A 1.38-g sample of a pure compound, with formula M2SO4 was dissolved in water and treated with an excess of aqueous calcium chloride, resulting in the precipitation of all the sulfate ions as calcium sulfate. The precipitate was collected, dried, and found to weigh 1.08 g. Determine the atomic mass of M and identify M. atomic mass of M WebAssign will check your answer for the correct number of significant figures. amu identity of

Answer: C

Explanation:

Answer:

Nitrogen fixation is the process of converting nitrogen to a usable form.

Answer:

What is the atomic number of neon?

10

What is the atomic mass of neon? Give your answer to the nearest tenth.

20.2

The periodic table is a representation of the periodic elements based on atomic numbers. The atomic number of neon is 10, and the atomic mass is 20.2 amu.

Neon is categorized as a stable gas that belongs to the noble gas group. It has been represented as Ne and is a monoatomic gas with no odor or color. It has an atomic number of 10 and an electronic configuration as, [He] 2s²2p⁶.

The atomic mass of neon elements is 20.2 amu and is said to have full electrons per shell. They do not need to donate or accept any electron as they have a balanced orbital. They have the property of fluorescence and are used in electric signs and lamps.

Therefore, neon is placed in group 18 and has atomic number 10 and a mass of 20.2 amu.

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Answer:

ionization energy and electronegativity

Explanation:

both increase as you go right and up

The final temperature of the water, after absorbing 17 kJ of heat, is approximately 48.35°C.

To find the final temperature of the water after absorbing 17 kJ of heat, we can use the equation:

q = m * c * ΔT

where:

q is the heat absorbed by the water,

m is the mass of the water,

c is the specific heat capacity of water,

ΔT is the change in temperature.

First, let's calculate the mass of the water using the volume and density:

Volume of water = 245 mL

Density of water = 1.0 g/mL

Mass of water = Volume * Density

Mass of water = 245 mL * 1.0 g/mL

Mass of water = 245 g

Next, we need to determine the specific heat capacity of water. The specific heat capacity of water is approximately 4.18 J/g°C.

Now, rearranging the equation, we can solve for the change in temperature (ΔT):

ΔT = q / (m * c)

ΔT = 17,000 J / (245 g * 4.18 J/g°C)

ΔT ≈ 16.35°C

The change in temperature (ΔT) represents the final temperature minus the initial temperature:

ΔT = Final Temperature - Initial Temperature

Rearranging the equation, we can solve for the final temperature:

Final Temperature = ΔT + Initial Temperature

Final Temperature = 16.35°C + 32°C

Final Temperature ≈ 48.35°C

It's important to note that this calculation assumes no heat loss to the surroundings or any phase changes occurring in the water (such as boiling or freezing). The specific heat capacity used (4.18 J/g°C) is an approximation and may vary slightly depending on the temperature range considered.

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The molecular formula of the unknown compound is C2H2O2.

To determine the molecular formula of the unknown compound, we need to calculate the empirical formula first and then find the multiple of its subscripts to obtain the molecular formula.

Given:

Percentage of carbon = 40.0%

Percentage of hydrogen = 6.7%

Percentage of oxygen = 53.3%

Molecular mass = 60.0 g/mol

Step 1: Convert the percentages to grams.

Assuming we have 100 grams of the compound:

Mass of carbon = 40.0 g

Mass of hydrogen = 6.7 g

Mass of oxygen = 53.3 g

Step 2: Convert the masses to moles using the molar masses of the elements.

Molar mass of carbon = 12.01 g/mol

Molar mass of hydrogen = 1.008 g/mol

Molar mass of oxygen = 16.00 g/mol

Number of moles of carbon = Mass of carbon / Molar mass of carbon

= 40.0 g / 12.01 g/mol

= 3.332 mol

Number of moles of hydrogen = Mass of hydrogen / Molar mass of hydrogen

= 6.7 g / 1.008 g/mol

= 6.648 mol

Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen

= 53.3 g / 16.00 g/mol

= 3.331 mol

Step 3: Determine the empirical formula by dividing the moles by the smallest value.

Dividing the moles of carbon, hydrogen, and oxygen by 3.331 gives approximately 1 for each element.

So, the empirical formula of the compound is CHO.

Step 4: Determine the multiple of the subscripts to obtain the molecular formula.

To find the multiple, we divide the molecular mass by the empirical formula mass.

Molecular mass = 60.0 g/mol

Empirical formula mass = (12.01 g/mol) + (1.008 g/mol) + (16.00 g/mol) = 29.018 g/mol

Multiple = Molecular mass / Empirical formula mass

= 60.0 g/mol / 29.018 g/mol

= 2.07

Rounding to the nearest whole number, we get 2.

Therefore, the molecular formula of the unknown compound is C2H2O2.

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Answer:

I'm pretty sure it's The second one

Explanation:

That one is the only one that looks like it started on a positive 5

Answer:

B

Explanation:

Answer:

              1.   114.62 g H2O

              2.   8.7616 g H2O

              3.   404.14 g of Ca3(PO4)2

              4.   583.63 g of PCl5

              5.   53.494 g of AlCl3

The incorrect rule for assigning oxidation numbers is Hydrogen is usually –1.

Hydrogen is usually +1

Oxidation numbers can be defined as that number which is assigned to an element in chemical reaction which represents the number of electrons lost or gained.

So therefore, the incorrect rule for assigning oxidation numbers is Hydrogen is usually –1.

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Answer:

B: Oxygen is usually –2.

Explanation:

To make 1 liter of a 10% NaCl solution from a solid stock, you will require the following materials and containers.MaterialsSolid NaClDistilled water1-Liter volumetric flask250-mL volumetric flask 2-beakersProcedureTo prepare 1 liter of a 10% NaCl solution, the following procedure should be followed:Measure out 100g of NaCl using a balance.

Measure the weight of an empty 250-mL volumetric flask.Add the NaCl to a 250-mL beaker and add a small amount of distilled water to it to dissolve the NaCl.Carefully pour the dissolved NaCl solution into the 250-mL volumetric flask. Add distilled water to the mark on the flask to make up the volume. Stopper the flask and invert it several times to mix the solution.Measure the weight of the 1-Liter volumetric flask.Add the 250-mL volumetric flask solution to a 1-Liter volumetric flask.Add distilled water to the mark on the flask to make up the volume.

Stopper the flask and invert it several times to mix the solution.The final volume of the solution will be 1 liter of a 10% NaCl solution.PrecautionsEnsure the NaCl has completely dissolved before adding more water to avoid making a less concentrated solution.Measure the weight of the volumetric flask before and after adding the solution to calculate the volume of solution that was added.Use distilled water to prepare the solution.

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Answer:

yolo go with C

Explanation:

Answer:

Two Lithium ions and one carbonate ion

Explanation:

Let us look at this equation;

Li2CO3(s) ------->2Li^(aq) + CO3^2-(aq)

We can see that each unit of Li2CO3 has two lithium ions and one carbonate ion.

Let us not forget that Li has a valency of 1 while carbonate ion has a valency of 2. Exchange of valencies gives the final formula of the compound.

Answer:

Two Lithium ions and one carbonate ion

Explanation:

Answer: Below is the answer

Explanation:

CaCO3 (s) = CaO (s) + CO2(g)

a) The CO2 will be removed. The CaCO3 mass will increase.

b) If the volume is decreased the pressure is increased in CO2.  The CaCO3 mass will decrease.

c) The Pressure will increase.

The relationship between acceleration due to gravity (g), mass of earth (M) and the radius of earth (R) is \(g = \frac{GM}{R^2} \).

The weight of an object is determined as the product of the object's mass and acceleration due to gravity.

F = mg

The gravitational force between two objects in the universe is directly proportional to the product of mass of the objects and inversely proportional to the square of the distance between the objects.

\(F = \frac{GmM}{R^2} \)

\(mg = \frac{GmM}{R^2} \\\\ g = \frac{GM}{R^2} \)

where;

M is the mass of the earth

R is the radius of the earth

Thus, the relationship between acceleration due to gravity (g), mass of earth (M) and the radius of earth (R) is \(g = \frac{GM}{R^2} \).

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Answer:

Sodium (Na) has more protons than carbon (C).

hope that helps!

Answer:

6,570,000

Rounded to 3 significant figures. The figures therefore are 6, 5, 7

The element in the second period of the periodic table with two 2p electrons is beryllium (Be).

How do I remember electron configurations?

In order to remember electron configurations, consider the following tips:

i.  1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p6

ii. When writing the configuration, start with the nearest noble gas and proceed onward. This is known as the core notation.

iii. Use the periodic table to determine the outermost electrons' positions.

The row number equals the highest principal quantum number, n, in the configuration, while the group number equals the highest value of the magnetic quantum number, l, in the valence subshell.

iv. The highest number of electrons that can fit into a subshell is given by 2 (2l + 1).

Pauli's exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers. As a result, if two electrons share a subshell, they must have different spin quantum numbers.

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The total dilution factor for the extracted curcumin sample is 60. The final solution is 60 times more dilute than the original extract.

To calculate the total dilution factor, we need to multiply the dilution factors of each step. In the first step, the 1 mL sample is diluted to 10 mL, which is a dilution factor of 10. In the second step, the 2 mL solution is diluted to 6 mL, which is a dilution factor of 3.

To find the total dilution factor, we multiply these individual dilution factors: 10 x 3 = 30. However, since we have two steps of dilution, we multiply by another factor of 2: 30 x 2 = 60.

Therefore, the total dilution factor is 60, indicating that the final solution is 60 times more dilute than the original extract.

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It will raise the concentration of OH- (aq), which will cause equilibrium to move in the other direction, causing the concentration of OH- (aq) to fall in order to restore balance.

The Latin term libra, which signifies weight or balance, is where the word equilibrium first appeared. Equilibrium can be visualized as an interesting story that is currently in rest. a vehicle that is going steadily. a chemical process where both the forward and backward rates of reaction are equal.

\(NH3(aq) + H2O (l) < === > NH4+ (aq) + OH- (aq)\)

NaOH is added to system \(: NaOH (aq) === > Na+ (aq) + OH- (aq)\)

(i) It will raise the concentration of OH- (aq), causing equilibrium to shift in a way that lowers the conc of OH- (aq) to attain equilibrium again: thus equilibrium will shift towards reactants (Left) .

(ii) Q\(= [OH-] [NH4+]/ [NH3] [H2O]\)

with increase in concentration of OH- (aq) (stress) ,value of Q​​​​​​​ will increase, since OH- appear in numerator .

(iii) Before equilibrium is re-established, rate of reverse reaction will exceed forward reaction, not vice-versa. As conc. of OH-(aq)decreases in towards reactants.

(iv) When equilibrium is re-established, rate of reverse reaction will be equal to rate of forward reaction, to maintain equilibrium.

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Answer:

mol is a measurement of large amounts so big

Answer:

Indium (49)

Explanation:

You can also add all the small numbers up to find the atomic mass of the element, in this case, all the small numbers add up to 49, so if you look for 49 on a periodic table you will find that it is Indium.

Answer:

Electrical conductivity

Explanation:

Electrical conductivity - A material's ability to conduct electricity

Actually, the presence of equal amounts of free hydrogen, as well as hydroxide ions is indicated by the neutral point at 7.0.

pH is a numerical indicator of how acidic or basic aqueous or even other liquid solutions are. The phrase, which is frequently used during chemistry, biology, as well as agronomy, converts the hydrogen ion concentration, which typically ranges between 1 but also 1014 gram-equivalents per liter, into numbers between 0 and even sometimes even 14.

A chemical solution that is neutral, being either acidic or basic. A neutral particle is one that has no electrical charge.

Therefore, actually, the presence of equal amounts of free hydrogen, as well as hydroxide ions is indicated by the neutral point at 7.0.

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Answer:

Negative

Explanation:

Electron is a subatomic particle with a negative charge of -1e unlike the proton which has a positive charge of +1e

In an atom, an electron has a net negative charge revolving in orbits around the nucleus.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer: When a mixture of carbon and water is filtered, the residue is the undissolved solid: carbon. Filtering is a process used to separate solid particles from a liquid by passing the mixture through a filter. The solid particles are retained on the filter, while the liquid passes through. In this case, the solid particles are the carbon, and the liquid is the water.

Therefore, the correct answer is: The UNDISSOLVED SOLID: carbon.

When a mixture of carbon and water is filtered, the undissolved solid carbon residue obtained. Therefore, option A is correct.

The term filtration is defined as the process in which solid particles in a liquid or gaseous fluid are extracted by the use of a filter medium that permits the liquid to transfer through but retains the solid particles.

When a mixture of carbon and water are filtered, the residue obtained is the undissolved solid carbon. Filtering is a process used to separate solid particles from a liquid by transferring the mixture through a filter.

The solid particles are remain on the filter paper, while the liquid passes through it. In this case, the solid particles are the carbon, and the liquid is the water.

Thus, option A is correct.

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Answer:

Evaporation

Explanation:

The water evaporated when heat was added causing the water to go.

Answer:

When water is heated the molecules move faster and since they vibrate the evaporate.

Explanation:

sciense :)

[HCHO₂] < [NaCHO₂]. This means that there are more NaCHO₂molecules present in the solution than HCHO₂ molecules, making option b the correct answer.

This is because when the pH of the solution is lower than the pKa of the weak acid (in this case, HCHO₂), the acid is in its protonated form (HCHO₂) and the conjugate base (NaCHO₂) is in its deprotonated form.

The formula "The molarity of products is divided by the molarity of reactants" is used to calculate the equilibrium constant of a process.

The equilibrium constant would be the ratio of the product concentration to the reactant concentration.

The amount of a solute per unit volume of solution, or the concentration of a chemical entity in a particular form of solution, has been determined by its molar concentration.

The formula "The molarity of products is divided by the molarity of reactants" is used to calculate the equilibrium constant of a process.
Additionally, it is possible to make a buffer from HCHO₂ and NaCHO₂ at this pH, as long as the ratio of the two is appropriate. The buffer capacity would be highest when the concentrations of HCHO₂ and NaCHO₂ are equal, making option e also a correct statement.

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A single water molecule (H-O-H) is held together by covalent bonds.

In a water molecule, one oxygen atom is bonded to two hydrogen atoms. These atoms are held together by covalent bonds, which involve the sharing of electrons between the atoms. Specifically, the oxygen atom shares one electron with each of the hydrogen atoms, and each hydrogen atom shares one electron with the oxygen atom. This sharing of electrons allows each atom to have a stable electron configuration, forming a strong and stable bond.

The resulting molecule has a bent shape, with an angle of approximately 104.5 degrees between the hydrogen-oxygen-hydrogen atoms. This shape contributes to the unique properties of water, such as its polarity and hydrogen bonding capabilities.

Additionally, water molecules have a dipole moment, meaning they have a slight positive and negative charge, allowing them to interact with other polar molecules. Overall, the structure and properties of the water molecule play a crucial role in its importance for life and the environment.

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