Which of the following properties increase as you move from left to right across a period? Select all that apply.
A)Ionization energy
B)None
C)Electronegativity
D)Atomic radius
Answers
Ionization energy and Electronegativity increase as you move from left to right across a period.
A period is a row in the periodic table of elements. It consists of elements with a similar number of atomic orbitals. The table is arranged so that elements with the same number of valence electrons are located in the same group, making it easy to identify the properties of elements.
Ionization energy is the energy required to remove an electron from a neutral atom in its gaseous state.
Electronegativity is the measure of an atom's ability to attract electrons to itself.
As we move from left to right across a period, the effective nuclear charge increases, thus both ionization energy and electronegativity increase.
Therefore, the correct options are A) Ionization energy and C) Electronegativity.
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Related Questions
The volume of a gas sample is 22.4 liters at STP. The density of the gas is 1.34 grams per liter.
What is the mass
of the gas sample, expressed to the correct number of significant figures?
Answers
Answer:
The mass of gas is 30.02 g.
Explanation:
Given data:
Volume of gas = 22.4 L
Density of gas = 1.34 g/L
Mass of gas = ?
Solution:
The given problem will be solved through density formula.
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
D=m/v
Now we will put the values in formula.
1.34 g/L = m /22.4 L
m = 1.34 g/L × 22.4 L
m = 30.02 g
The mass of gas is 30.02 g.
Which statement is a testable hypothesis?
A. Beans are the best plants to use in a science fair experiment.
B. Watering bean plants with salt water will make them grow faster.
C. Bean plants will become extinct before corn plants do.
D. Everyone can grow beans given the right instructions.
please help. i’ll give brainliest if ur answer is correct
Answers
Answer:
b
Explanation:
I think B because its saying that perhaps watering with salt water would make them grow faster, you don't know yet unless tested.
q5. determine the volume of h2s (at 225 k and 725 torr) needed to produce 14.0 g of s. assume that there is excess so2 present.
Answers
Based on stoichiometry and the ideal gas law, approximately 0.143 L of H₂S gas is needed to make 14.0 g of S.
To determine the volume of H₂S gas needed to produce 14.0 g of S, we need to use stoichiometry and the ideal gas law.
The balanced equation for the reaction between H₂S and SO₂ to produce S is:
H₂S + 2 SO₂ -> 3 S + 2 H₂O
From the balanced equation, we can see that 1 mole of H₂S produces 3 moles of S.
First, we need to calculate the number of moles of S produced from 14.0 g of S:
Molar mass of S = 32.06 g/mol
Number of moles of S = 14.0 g / 32.06 g/mol = 0.436 mol
Since 1 mole of H₂S produces 3 moles of S, we can calculate the number of moles of H₂S needed:
Number of moles of H₂S = 0.436 mol / 3 mol = 0.145 mol
Next, we can use the ideal gas law to find the volume of H₂S gas:
PV = nRT
Where:
P = pressure = 725 torr
V = volume (unknown)
n = number of moles of H₂S = 0.145 mol
R = ideal gas constant = 0.0821 L·atm/(mol·K)
T = temperature = 225 K
Rearranging the equation to solve for V:
V = (nRT) / P
Substituting the values:
V = (0.145 mol * 0.0821 L·atm/(mol·K) * 225 K) / 725 torr
Converting torr to atm (1 atm = 760 torr):
V = (0.145 mol * 0.0821 L·atm/(mol·K) * 225 K) / (725 torr / 760 torr/atm)
Calculating the volume:
V = 0.143 L
Therefore, the volume of H₂S gas needed to produce 14.0 g of S is approximately 0.143 L.
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When you weigh yourself on good old terra firma (solid ground), your weight is 151 lb. In an elevator your apparent weight is 131 lb ?
Answers
The magnitude of the elevator's acceleration is 1.63 m/s².
The weight of an object is the force with which it is attracted to the center of the Earth due to gravity. On solid ground, your weight is equal to your mass times the acceleration due to gravity (g), which is approximately 9.81 m/s². Therefore, your mass would be;
mass = weight / g = 151 lb / (9.81 m/s² × 2.2046 lb/kg)
≈ 68.49 kg
In the elevator, your apparent weight is different because the elevator is accelerating. The force acting on you in the elevator is the sum of your weight and the force due to the acceleration of the elevator, which is given by;
force = mass × (g + acceleration)
When the elevator is moving upward with an acceleration a, your apparent weight is;
131 lb = mass × (g + a)
Substituting the value of mass, we get;
131 lb = 68.49 kg × (9.81 m/s² + a)
Solving for a, we get;
a = (131 lb / 68.49 kg - 9.81 m/s²)
≈ 1.63 m/s²
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--The given question is incomplete, the complete question is
"When you weigh yourself on good old terra firma (solid ground), your weight is 151 lb. In an elevator your apparent weight is 131 lb . What is the magnitude of the elevator's acceleration?"--
Some of the brine is encapsulated within ice crystals, but most is trapped in the spaces between neighboring crystals. When air temperature falls below 0°C, the brine migrates downward, toward the higher water temperatures below. Eventually, the high-density brine drains into the water beneath the ice. In the process, the sea ice freshens while the salinity of the underlying water. and becomes
a increases less dense
b
increases
more dense
c. decreases less dense
d. decreases
more dense
Answers
The high-density brine drains into the water beneath the ice and in the process, the sea ice freshens while the salinity of the underlying water decreases, becoming less dense (Option C).
Sea ice is usually less salty than the ocean water it freezes from. During the process of ice formation, salt in the ocean water is expelled from the ice as it grows; most of the salt is ejected into the ocean but some remain trapped inside pockets of brine within the ice. When the air temperature falls below the freezing point of seawater (usually around -1.8 °C), water molecules start to form ice crystals, which grow and aggregate into a solid sheet of ice.
During this process, the salt rejected by the growing ice also accumulates, causing the salinity of the remaining brine to increase. Some of the brine is encapsulated within ice crystals, but most are trapped in the spaces between neighboring crystals.
Thus, the correct option is C.
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write an equation that shows how the anion acts as a base.For F , write an equation that shows how the anion acts as a base.Express your answer as a chemical equation. Identify all of the phases in your answer
Answers
Create an equation that demonstrates the anion's base-like behavior. Put your response in the form of a chemical equation. In your response, list each phase.
Which five chemical equations can you think of?Simple Chemical Reaction Examples
oxygen and hydrogen ---> oxygen, iron, and water chloride, lime + carbon dioxide, rust, potassium and chlorine gas, sodium bicarbonate
Using water, carbon dioxide, and light, photosynthesis creates glucose and oxygen.
Give an example of a chemical equation.The initial entities are presented here on left hand side of a chemical equation, while the product things are given on the right hand side. A molecular formula is an universal symbol of a chemical reaction that takes the form of symbols and equations. such as CaCO3(s)CaO(s)+CO2 (g)
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hydrazine (N2H4) decomposes to produce N2 and NH3. how many molecules of NH3 will be formed if 60 molecules of N2H4 decompose into N2 and NH3?
Answers
Hydrazine is a chemical compound with the formula \(N_2H_4\). 120 molecules of\(NH_3\) will be formed if 60 molecules of \(N_2H_4\) decompose into \(N_2\) and \(NH_3\).
It is used as a rocket fuel and as a polymerization catalyst in the production of plastics and when hydrazine decomposes, it produces nitrogen gas (\(N_2\)) and ammonia (\(NH_3\)). If 60 molecules of hydrazine decompose into \(N_2\) and \(NH_3\), the number of molecules of \(NH_3\) that will be formed can be determined using the balanced equation for the reaction: \(N_2H_4 -- > N_2 + 2NH_3\). For every one molecule of hydrazine that decomposes, two molecules of ammonia are formed. Therefore, the number of ammonia molecules produced is twice the number of hydrazine molecules that decompose. Since 60 molecules of hydrazine are decomposing, the number of ammonia molecules formed is: 2 x 60 = 120 molecules of \(NH_3\)
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The study of ____ is called genetics
Answers
Answer: Heredity
Explanation:
At a more practical level, an understanding of human heredity is of critical importance in the prediction, diagnosis, and treatment of diseases that have a genetic component. The quest to determine the genetic basis of human health has given rise to the field of medical genetics.
carbondiooxide does not support in burning but mg burs in it why.?
Answers
To keep burning, fires require oxygen. Carbon dioxide is used in certain fire extinguishers to put out flames. Explanation: Because magnesium is higher on the reactivity scale than carbon, it is more reactive and eliminates oxygen from carbon dioxide (to give carbon and magnesium oxide).
Which letter represents energy released to make new intermolecular forces??
Answers
Answer: Its Energy D
Explanation:
a solid sample of copper is an excellent fondue to if electric current which type of chemical bonds are in the sample
Answers
If a solid sample of copper is an excellent conductor of electric current, it is likely due to the presence of metallic bonds in the sample.
What is meant by good conductor?Good conductors are the materials which offer very low resistance to the flow of electric current.
Solid copper is a metal, and metals have metallic bonds. Metallic bonds are a type of chemical bond that occur between atoms of metallic elements. In a metallic bond, valence electrons of the metal atoms are delocalized and shared among all the atoms in metallic solid, creating "sea" of electrons that are free to move throughout the structure.
This gives metals their unique properties such as high electrical conductivity and ductility. So, if solid sample of copper is an excellent conductor of electric current, it is likely due to the presence of metallic bonds in sample.
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: A solid sample of copper is an excellent conductor of electric current . Which type of chemical bonds are in the sample?
What is the formula for Water?
Name full name element's name
Answers
Answer:
2 Hydrogen atoms and 1 Oxygen atoms makes water
Explanation:
Hope this helps^^
Answer: Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms,
Explanation: i hopes it helps :)
PLS ANSWER ASAP THANKS
The boiling point of 2-chloroheptane is 46 °C at 19 mmHg. What
is the approximate normal boiling point? you can use the vapor
pressure nomograph
Answers
The approximate normal boiling point of 2-chloroheptane can be determined using a vapor pressure nomograph. Given that the boiling point of 2-chloroheptane is 46 °C at 19 mmHg, we can use the nomograph to estimate the boiling point at normal atmospheric pressure.
1. The vapor pressure nomograph is a graphical representation that relates the boiling point and vapor pressure of a substance at different pressures. To estimate the normal boiling point, we need to determine the vapor pressure at standard atmospheric pressure (760 mmHg) using the given data.
2. On the vapor pressure nomograph, locate the point representing 19 mmHg on the y-axis and draw a horizontal line to intersect with the diagonal line representing the normal boiling point. From this intersection, draw a vertical line down to the x-axis to determine the temperature corresponding to 19 mmHg.
3. By estimating the intersection point, we find that the temperature is approximately 46 °C at 19 mmHg. Since the normal boiling point is defined as the boiling point at atmospheric pressure (760 mmHg), we can approximate the normal boiling point of 2-chloroheptane to be around 46 °C.
4. It's important to note that the accuracy of this approximation depends on the precision and reliability of the vapor pressure nomograph used.
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What is the MOA of acetaminophen?
Answers
The exact mechanism of action (MOA) of acetaminophen is not fully understood. It is believed to work by blocking the production of prostaglandins, which are substances that cause inflammation and pain.
Acetaminophen, also known as paracetamol, is an analgesic and antipyretic medication used for the relief of mild to moderate pain and fever. Acetaminophen also has some inhibitory effects on the central nervous system and increases the pain threshold. It is thought to reduce the body's production of certain hormones that can cause fever.
Acetaminophen is considered to be a relatively safe drug with few side effects, and it is available over-the-counter. It is important to follow the recommended dosage and not to exceed the maximum daily amount. Acetaminophen is an effective medication for relieving mild to moderate pain and fever and can be used safely when taken at the recommended dosage.
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which of the following does not contain a covalent bond ( please answer asap!! )
Answers
Answer:
Option 4
Explanation:
If W, X, Y, and Z are different monodentate ligands, how many geometric isomers are there for this ion?
Tetrahedral [ZnWXYZ]2+
Answers
For a tetrahedral complex with four different monodentate ligands, there are two possible geometrical isomers: the cis isomer, where the identical ligands are adjacent to each other (i.e., either WX-ZY or WY-XZ), and the trans isomer, where the identical ligands are opposite to each other (i.e., either WX-YZ or WY-XZ).
Therefore, the number of geometric isomers for the [ZnWXYZ]2+ ion is two. It's worth noting that if any of the ligands were bidentate or polydentate, the number of isomers would be higher due to the possibility of different chelating modes.
In a tetrahedral [ZnWXYZ]2+ complex, there are no geometric isomers present. This is because a tetrahedral complex has a single symmetrical arrangement of the four monodentate ligands W, X, Y, and Z around the central metal ion Zn2+. Geometric isomerism arises when there are multiple possible arrangements of ligands around the metal ion, leading to distinct structures. However, in a tetrahedral complex, there is only one possible arrangement, and hence no geometric isomers can be formed.
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are electrons in an atom or molecule most stable when they are paired or unpaired?
Answers
Answer:
Unpaired
Explanation:
Electrons go with neutrons and have to pair to be able to get a molecule or atom. It would be better if they were paired so that you wouldn't have an unstable atom or element.
Estimate the ΔH (kcal/mol) for the reaction of hydrogen and oxygen to form water: 2 H2 + O2 2 H2O ΔH = ?
Answers
To estimate the deltaH for the reaction we can do it from the bond energies, that is, starting from the energy needed to form or break a bond.
The reaction energy will be equal to the binding energy of the reactants minus the binding energy of the products. To calculate each bond energy we must first identify which bonds are involved in the reaction. They give us a balanced reaction:
\(2H_2+O_2\rightarrow2H_2O\)For the reaction, we have the following bonds
\(\begin{gathered} 2\lbrack H-H\rbrack+1\lbrack O=O\rbrack\rightarrow2\lbrack H-O-H\rbrack \\ 2\lbrack H-H\rbrack+1\lbrack O=O\rbrack\rightarrow2\times2\lbrack O-H\rbrack \end{gathered}\)Now we are going to calculate the energy taking into account the values that we can find in tables of the bond energy.
Bond Ee (kJ/mol)
H - H 436
O=O 499
O - H 460
Therefore the energy on each side of the reaction will be:
\(\begin{gathered} 2\lbrack H-H\rbrack+1\lbrack O=O\rbrack\rightarrow2\times2\lbrack O-H\rbrack \\ 2\times436\frac{kJ}{mol}+1\times499\frac{kJ}{mol}\rightarrow2\times2\times460\frac{kJ}{mol} \\ 1371\frac{kJ}{mol}\rightarrow1840\frac{kJ}{mol} \end{gathered}\)The reaction energy will be:
\(\begin{gathered} \Delta H_r=\Delta H_{Reac\tan ts}-\Delta H_{Products} \\ \Delta H_r=1371\frac{kJ}{mol}-1840\frac{kJ}{mol}=-469\frac{kJ}{mol} \end{gathered}\)We have an exothermic reaction since the result is negative. This means that the energy of the products is greater than that of the reactants.
Now we will convert the energy units to kcal:
\(\Delta H_r=-469\frac{kJ}{mol}\times\frac{1\text{kcal}}{4.184kJ}=-112\frac{kcal}{\text{mol}}\)ΔH (kcal/mol) estimated of the reaction will be -112kcal/mol
Express the measurement using the appropriate SI prefix. 2.50 x 10-3g
Answers
WHAT TIME IS IT WHERE U ARE?
Answers
Answer:
3:46 pm
Explanation:
Answer:
8:47 p.m
Explanation:
Particles 91, 92, and q3 are in a straight line.
Particles q1 = -28.1 uc, q2 = +25.5 uc, and
q3 = -47.9 uc. Particles qi and q2 are separated
by 0.300 m. Particles q2 and q3 are separated by
0.300 m. What is the net force on q3?
Remember: Negative forces (-F) will point Left
Positive forces (+F) will point Right
Answers
The net force on particle 3 due to the presence of particle 1 and particle 2 on the same straight line is 50.5 N to the right.
Force between particle 1 and particle 2
The force between the two particles is determined from Coulomb's law as shown below;
F = kq₁q₂/r²
F(1,2) = -(9 x 10⁹ x 28.1 x 10⁻⁶ x 25.5 x 10⁻⁶) / (0.3)²
F(1,2) = - 71.66 N
Force between particle 2 and particle 3F(2,3) = + (9 x 10⁹ x 25.5 x 10⁻⁶ x 47.9 x 10⁻⁶) / (0.3)²
F(2,3) = + 122.15 N
Net force on particle 3The net force on particle 3 is determined as follows;
F(net) = 122.15 N - 71.66 N
F(net) = + 50.5 N
Thus, the net force on particle 3 due to the presence of particle 1 and particle 2 on the same straight line is 50.5 N to the right.
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The formula h20means
Answers
Answer:
water
Explanation:
Explanation
H2 means that there 2 hydrogen and O one Oxygen molecule
Calculate the volume of 10.3 g of MnO2?
Answers
V = Mass /Density
Density is supposed to be given, but its not
solids typically have a density of 5.03 g/cm^3
V = 10.3/5.03
V = 2.05 cm^3
Adipic acid is an organic compound composed of 49.31%C, 43.79%O, and the rest hydrogen. If the molar mass of adipic acid is 146.1 g/mol , what are the empirical and molecular formulas for adipic acid?
Answers
Considering the definition of empirical and molecular formula, the empirical formula is C₃H₅O₂ and the molecular formula is C₆H₁₀O₄.
Definition of empirical formulaThe empirical formula or minimal formula is one that indicates the type of atoms that make up a compound, the minimum ratio of the integer number of atoms and not necessarily the exact number of atoms in it.
Definition of molecular formulaThe molecular formula is the actual formula of the molecule and indicates the types of atoms and the number of each type involved in the formation of the molecule.
This formula can be obtained from the empirical or minimal formula, as long as the molecular mass of the compound is known. That is, divide the estimated molecular mass divided by the molecular mass of the empirical form. With the multiple obtained, we proceed to multiply the subscripts of the empirical formula, thus obtaining the molecular formula of the compound.
Empirical formula in this caseIn this case, you know:
Carbon (C): 49.31%Oxygen (O): 43.79%Hydrogen (H): 6.9%Assuming a 100 grams sample, the percentages match the grams in the sample. So you have:
Carbon (C): 49.31 gramsOxygen (O): 43.79 gramsHydrogen (H): 6.9 gramsThen it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:
Carbon (C): 49.31 grams÷ 12 g/mole= 4.109 molesOxygen (O): 43.79 grams÷ 16 g/mole= 2.74 molesHydrogen (H): 6.9 grams÷ 1 g/mole= 6.9 molesThe empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:
Carbon (C): 4.109 moles÷ 2.74 moles= 1.5 Oxygen (O): 2.74 moles÷ 2.74 moles= 1Hydrogen (H): 6.9 moles÷ 2.74 moles= 2.5The empirical formula must be expressed using whole number relationships, so:
Carbon (C): 1.5× 2= 3Oxygen (O): 1× 2= 2Hydrogen (H): 2.5× 2= 5Therefore the C: H: O mole ratio is 3: 5: 2
Finally, the empirical formula is C₃H₅O₂.
Molecular formula in this caseThe molar mass of adipic acid is 146.1 g/mol and the molar mass of empirical formula is 69 g/mole.
Dividing the estimated molecular mass divided by the molecular mass of the empirical form, you get:
146.1 g/mol÷ 69 g/mol ≅ 2
This means that in the molecular formula there are 2 unit formulas, so it is necessary to multiply the number of all atoms by 2:
Molecular formula= 2×C₃H₅O₂
Molecular formula= C₆H₁₀O₄
The molecular formula is C₆H₁₀O₄.
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What are the positive relationships of the great white shark called?
Answers
Other than carbon being relatively small, what is another reason that carbon can form so many compounds? the ability to form four covalent bonds the ability to change shape the ability to form a diatomic molecule the ability to split its electrons
Answers
Answer:
Ability to form four covalent bonds.
Explanation:
Carbon is the first member of group 14. It is essentially a nonmetal. It is a small atom which regularly exhibits tetra valency. This means that carbon is able to form four covalent bonds to four chemical species which may be the same or different each time. This leaves room for many different possible combination patterns of carbon with other chemical species.
Hence carbon forms a very large number of compounds due to its small size and its ability for form four covalent bonds to other chemical species in any bonding situation.
Answer: the ability to form four covalent bonds
Explanation:
If for good Z income elasticity is less than 1 but greater than zero, then demand for good Z is income __________, and good Z is a(n) __________ good.
Answers
If for good Z income elasticity is greater than 1, then demand for good Z is income elastic, and good Z is a(n) normal good, option C.
The pricing of some items are particularly inelastic, according to economists. In other words, neither a price decrease nor an increase in price significantly affect demand. For instance, the price-elasticity of demand for petrol is low. Drivers, as well as airlines, the trucking sector, and practically every other buyer, will continue to make as many purchases as necessary.
It is not unexpected that marketing experts are really interested in this idea. Even yet, it may be argued that their main objective is to increase inelastic demand for the goods they promote. They accomplish this by finding a significant distinction between their items and any others on the market.
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Complete question:
If for good Z income elasticity is greater than 1, then demand for good Z is income __________, and good Z is a(n) __________ good.
a. inelastic; normal
b. inelastic; inferior
c. elastic; normal
d. elastic; inferior
e. unit elastic; normal
calculate the amount of heat released from combustion of 2 g of wood. the heat capacity of the bomb calorimeter is 9.96 kj/°c .
Answers
If the heat capacity of the bomb calorimeter is 9.96 kj/°c, then the amount of heat released from combustion of 2 g of wood is 39.84 kJ.
To determine the amount of heat released from combustion of 2 g of wood, you need to use the formula
Q = C × ΔT Where:Q is the heat released or absorbed in joules (J)C is the heat capacity of the bomb calorimeter (given as 9.96 kJ/°C)ΔT is the change in temperature in degrees Celsius (°C)We can assume that all the heat released from the combustion of the wood is absorbed by the calorimeter, so we can use the heat capacity of the calorimeter to calculate the heat released. Since the calorimeter absorbs the heat, the value of Q will be negative (i.e. the heat is released).
Given: Mass of wood = 2 g Heat capacity of the bomb calorimeter = 9.96 kJ/°C First, we need to calculate the change in temperature. This can be done by measuring the temperature of the calorimeter before and after combustion. Let's assume that the temperature increases by 4.0 °C.ΔT = 4.0 °C Now, we can calculate the heat released: Q = C × ΔTQ = (9.96 kJ/°C) × (4.0 °C)Q = 39.84 kJ
Therefore, the amount of heat released from combustion of 2 g of wood is 39.84 kJ.
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The pressure of a 980.0 mL sample of gas at a constant temperature is increased from 0.4620 atm to
0.6320 atm. What is the final volume of the gas?
Answers
Answer:
P
1
V
1
T
1
=
P
2
V
2
T
2
Explanation:
P
1
V
1
T
1
=
P
2
V
2
T
2
, given a constant quantity of gas.
And thus,
P
1
×
V
1
×
T
2
V
2
×
T
1
=
P
2
, even given this format, we can see the problem is dimensionally sound. We do need to use
absolute temperature.
P
2
=
1.00
⋅
a
t
m
×
250
⋅
m
L
×
313
⋅
K
500
⋅
m
L
×
293
⋅
K
≅
1
2
⋅
a
t
m
.
Explanation:
MULTIPLE CHOICE QUESTION
You shouldn't believe scientific theories
because they are "just a theory" and not
a law.
Answers
Usually scientific law is description of the phenomenon observed but it doesn't explain why or what of that particular phenomenon .
What is the difference between scientific law and scientific theories?1) Scientific law predicts the results of certain initial conditions and scientific theories are the explanation of that particular condition or phenomenon.
Theories do not become law until repeated experiment, no matter the amount of supporting evidence.
examples of theories are Oparin and haldane theory, cell theory, germ theory .
Examples of Scientific Laws Newton's law, laws of inheritance, laws of reflection and Rarefraction .
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