Which equation has water as a product in the chemical reaction?

A. Na + CI → NaCl

B. Na + H20 → NaOH + H2 O

C. CO2 + 02 + energy → C6H1206 + 02

D. H2 + 02→ H20

The balanced chemical equation for the neutralization reaction between sulfuric acid and potassium hydroxide is:

H2SO4(aq) + 2KOH(aq) → K2SO4(aq) + 2H2O(l)

From the equation, we can see that one mole of sulfuric acid reacts with two moles of potassium hydroxide. Therefore, we need to calculate the number of moles of potassium hydroxide present in the 30.0 mL of 0.260 M solution:

0.260 mol/L x 0.0300 L = 0.00780 mol KOH

Since the stoichiometric ratio of sulfuric acid to potassium hydroxide is 1:2, we need twice as many moles of sulfuric acid to neutralize the potassium hydroxide:

2 x 0.00780 mol = 0.0156 mol H2SO4

Finally, we can calculate the volume of the 0.235 M sulfuric acid solution required to provide 0.0156 moles of H2SO4:

0.0156 mol / 0.235 mol/L = 0.0664 L = 66.4 mL

Therefore, 66.4 mL of the 0.235 M sulfuric acid solution is required to neutralize 30.0 mL of 0.260 M potassium hydroxide.

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Answer:  A. 28

If we aren't talking about an isotope, then the number of neutrons and the number of protons in the nucleus are the same. Each proton weighs one atomic unit, and the same can be said about a neutron as well. So half of the weight is from the protons and half is from the neutrons. The electrons are extremely small relative to the protons that their weight is negligible.

Answer:

81 °C

Explanation:

This is a calorimetry question so a few things you will need for this. The calorimetry equation q=mcΔT & the specific heat of water (4.2J/g•°C). Other definitions are:

q = heat added/released by a sample

m = mass of sample

c=specific heat of sample

ΔT = change in temperature

from here we can rearrange the equation to state:

q/(mc) = ΔT

1200J/((20.0g)(4.2J/g•°C)) = ΔT

14°C = ΔT

If the starting temperature was 95.0°C and we know that the temperature was cooled by 14°C then the final temperature of the water would be 81.

Answer:

C. 81 c

Explanation:

took the test :)

Answer:

they move closer to each other

Answer:

They move closer to each other

Explanation:

Got it right on the test

Hope this helps :)

Answer:

D.

Explanation:

Burning is a chemical change as new substance (ash) is formed with new properties and it cannot be reversed.

Answer:

B. 223 grams

Explanation:

Look at the largest weight first: 200 grams

Look at the 2nd largest: 20 grams

Look at the smallest: 3 grams

200 + 20 + 3 = 223 grams

Answer:

223 grams

Explanation:

The volume of 0.175M sodium sulfate solution that is necessary to completely react with 35.0 mL of 0.112M silver nitrate is 22.4mL.

Molarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

The volume of a solution can be calculated using the following expression:

CaVa = CbVb

Where;

According to this question, 0.175M sodium sulfate solution completely reacts with 35.0 mL of 0.112M silver nitrate. The volume required for this reaction to occur can be calculated as follows:

0.175 × Va = 35 × 0.112

0.175Va = 3.92

Va = 3.92/0.175

Va = 22.4mL

Therefore, 22.4mL is the volume of the sodium sulfate needed.

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The intermolecular forces that contribute to creating a solution of CH2Cl2 in H2O are:

H-bonding does not occur in this case as CH2Cl2 is a non-polar molecule and does not possess a hydrogen atom that is bonded to an atom with a high electronegativity such as nitrogen, oxygen or fluorine.

Hence, it can be noted that in order to create a solution of CH2Cl2 in H2O, you would have to use the intermolecular forces which are the London Dispersion Forces and Dipole-dipole Interactions

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You will need to administer 30ml of potassium chloride to the patient.

To calculate the volume (ml) of potassium chloride to administer, we can use a proportion. The given label states that there are 20mEq of potassium chloride in 15ml.

Let's set up the proportion:

20mEq / 15ml = 40mEq / x ml

To solve for x, cross-multiply:

20mEq * x ml = 15ml * 40mEq

Now divide both sides by 20mEq:

x ml = (15ml * 40mEq) / 20mEq

Simplifying further, we get:

x ml = 30ml

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Radiocarbon is first produced in the Earth's upper atmosphere when neutrons strike nitrogen atoms.

Radiocarbon, or carbon-14 (C-14), is formed through a process known as cosmic ray bombardment. In the Earth's upper atmosphere, cosmic rays from outer space interact with nitrogen atoms in the atmosphere.

These cosmic rays contain high-energy neutrons that collide with nitrogen-14 (N-14) atoms, which are the most abundant form of nitrogen. When a neutron strikes a nitrogen-14 atom, it can dislodge a proton, resulting in the formation of carbon-14.

The collision between the neutron and the nitrogen-14 atom causes the nitrogen atom to undergo a transformation, converting it into carbon-14. This newly formed carbon-14 atom is unstable and radioactive, with a half-life of about 5,730 years.

It will eventually decay back into nitrogen-14 through the emission of a beta particle (electron) and a neutrino.

Once formed, carbon-14 mixes with the carbon dioxide in the atmosphere and is taken up by living organisms through processes like photosynthesis.

This incorporation of carbon-14 into living organisms allows scientists to use radiocarbon dating to estimate the age of organic materials, such as archaeological artifacts or ancient fossils, by measuring the amount of carbon-14 remaining in the sample.

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It is estimated that it would take between 50 to 200 years for atmospheric \(CO_2\) concentrations to return to preindustrial levels after we stop emitting carbon without geoengineering.

Atmospheric refers to the gaseous layer of the Earth's environment that encircles the planet and supports life. It is composed of a mixture of nitrogen (78%), oxygen (21%) and small amounts of other gases such as carbon dioxide (0.04%). The atmosphere is an essential component of Earth's environment, providing a protective layer that shields us from the sun's harmful radiation and helps to regulate our climate. It also serves as a reservoir for gases that are important to life, such as water vapor and oxygen. The atmosphere is constantly changing, both on a global and local scale.

This is because the ocean absorbs\(CO_2\)over time, but only at certain rates. In addition, \(CO_2\)released into the atmosphere from land use, such as deforestation, can also contribute to the buildup of atmospheric \(CO_2\). Therefore, it takes considerable time for the ocean and other natural processes to absorb the extra \(CO_2\) released from human activities.

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Answer:

body temperature and energy

Using the Arrhenius equation, we must plot ln(k) versus 1/T and estimate the slope of the resulting line to determine the activation energy for the reaction.

The following is the Arrhenius equation:

ln(k) = -Ea/(R*T) + ln(A)

Where:

k is the rate constant

Ea is the activation energy

R is the gas constant (8.314 J/(mol*K))

T is the temperature in Kelvin

A is the pre-exponential factor or frequency factor

The values ​​of k at two different temperatures—352 K and 426 K—are given. These facts allow us to determine the activation energy.

Taking the natural logarithm of both sides of the Arrhenius equation gives us:

ln(k) = -Ea/(R*T) + ln(A)

Rearranging the equation to isolate Ea, we get:

ln(k) + Ea/(R*T) = ln(A)

Now that we have ln(k) versus 1/T, we can calculate the slope of the line. Rearranging the equation allows us to find the activation energy E since the slope of the line is equal to -Ea/(R).

Plot ln(k) on the y-axis and 1/T on the x-axis using the values ​​provided. To determine the activation energy (Ea) in the correct quantity (J/mol or kJ/mol), calculate the slope of the line and multiply the result by the gas constant (R).

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Answer:

ganda no beeeeeèeeeeee

The balanced chemical equation for the reaction between magnesium and sulfur can be written as:Mg + S → MgSUsing this equation, we can determine the number of grams of magnesium sulfide produced when 2.3 grams of magnesium combines with 7.6 grams of sulfur. The first step is to determine which of the reactants is limiting.

The limiting reactant is the reactant that is completely consumed when the reaction goes to completion. The other reactant is in excess and will be left over once the reaction is complete.To determine the limiting reactant, we need to convert the mass of each reactant to moles. The molar mass of magnesium is 24.31 g/mol, and the molar mass of sulfur is 32.06 g/mol.Moles of Mg = 2.3 g / 24.31 g/mol = 0.0945 molMoles of S = 7.6 g / 32.06 g/mol = 0.237 molThe ratio of moles of magnesium to moles of sulfur is 1:1.

Therefore, magnesium is the limiting reactant.To determine the mass of magnesium sulfide produced, we need to use the stoichiometry of the balanced equation. One mole of magnesium reacts with one mole of sulfur to produce one mole of magnesium sulfide. Therefore, 0.0945 moles of magnesium will react with 0.0945 moles of sulfur to produce 0.0945 moles of magnesium sulfide.Mass of MgS = 0.0945 mol × 56.30 g/mol = 5.32 g.

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Answer:

c...................................

Answer:

Picture 1: Unhealthy

Picture 2: Healthy

Explanation:

Too much algae can start releasing toxins into the air burning the ozone hole and affecting climate change

Invertebrates are healthy, like bees who make honey for us., In truth most bugs we need in this world, even if we don't notice them

Brainliest please

The new molarity of the solution is 0.5M.

The molarity of a solution can be calculated by using the following expression:

C1V1 = C2V2

Where;

According to this question, a chemist dilutes 2.0 L of a 1.5 M solution with water until the final volume is 6.0 L.

1.5 × 2 = 6 × C2

3 = 6C2

C2 = 3/6 = 0.5M

Therefore, the new molarity of the solution is 0.5M.

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Two optical isomers can form:

An equimolar mixture of two optical isomers is called a racemic mixture.

What is a Racemic mixture?

An equimolar mixture of two enantiomers that is optically inactive is known as a racemic mixture (or racemate) (i.e. does not rotate plane-polarized light).

The racemic mixture can be created by:

The light that is plane-polarized does not spin in an optically inactive mixture.

Since each enantiomer rotates plane-polarized light to an equal and opposite extent, an equimolar mixture of two enantiomers will typically result in a racemic mixture. There won't be any net rotation if they are both present in equal proportions.

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Answer:

29 ouns

Explanation:

it has 950 billion so it will be scaled in grams not kilograms

Nucleophilic aromatic substitution (NAS) is a type of reaction where a nucleophile substitutes a leaving group on an aromatic ring. In the presence of a strong nucleophile and an appropriate leaving group, phenol can be formed by NAS.

However, when cyclopentadiene is used as a solvent in NAS, it can act as a nucleophile itself and react with the electrophile, which results in the formation of a cyclopentadienyl cation. The cyclopentadienyl cation can then undergo various reactions, such as rearrangements and addition reactions with other nucleophiles, depending on the reaction conditions.

Therefore, in the presence of cyclopentadiene as a solvent, instead of phenol, other products such as cyclopentadiene adducts, rearranged cyclopentadienes, or other byproducts can be formed. It is important to carefully consider the choice of solvent in NAS reactions to ensure that it does not interfere with the desired reaction mechanism and does not lead to the formation of unwanted products.

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Answer:

dic

Explanation:

Depending on the characteristics of the surfaces and the angle of incidence, light that travels through two surfaces will have its route altered and may reflect, absorb, transmit, or be refracted.

Reflection is one of the most significant wave-like characteristics of light. Our eyes perceive the light that has been reflected. The colors we perceive are also influenced by the way light reflects off objects. Some of the waves will bounce off the surface as it hits a new medium.

Light waves behave similarly throughout the electromagnetic spectrum. Depending on the nature of the item and the light's wavelength, a light wave can be transmitted, reflected, absorbed, refracted, polarised, diffracted, or scattered when it comes into contact with a surface.

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Answer:

volume = mass/ densidad

0.88g/cm3 = 880kg/m3

v=20kg/880kg/m3

v=0.02272727272

o puede ser 0.0227

o tambien puede ser 0.023

M = (moles of solute) / (volume of solution in liters)

To calculate the molarity of the chloride ion in the diluted solution of residue using the average volume, follow these steps:
1. Determine the average volume of the diluted solution: Add up the volumes of all the diluted samples and divide by the number of samples to get the average volume.

2. Calculate the moles of chloride ions: To do this, you'll need the initial concentration of chloride ions in the original solution (in mol/L) and the volume of the original solution before dilution (in L). Multiply the initial concentration by the original volume to get the moles of chloride ions.

3. Calculate the molarity of chloride ions in the diluted solution: Divide the moles of chloride ions calculated in step 2 by the average volume of the diluted solution obtained in step 1 (in L). The result will be the molarity of the chloride ions in the diluted solution.

Remember to use the appropriate units when performing calculations and to convert between units when necessary.

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42.5 mL of LiOH are required to reach the equivalence point in the titration of 85.0 mL of 0.400 M HCOOH with 0.150 M LiOH.

The balanced chemical equation for the reaction between formic acid (HCOOH) and lithium hydroxide (LiOH) is:

HCOOH + LiOH → LiCOOH + H2O

From the equation, we can see that the stoichiometry of the reaction is 1:1, meaning that one mole of HCOOH reacts with one mole of LiOH. To determine the volume of LiOH required to reach the equivalence point, we can use the formula:

n(HCOOH) = n(LiOH)

where n represents the number of moles of each compound. Rearranging the formula to solve for the volume of LiOH, we get:

V(LiOH) = n(LiOH) / C(LiOH)

where C represents the concentration of LiOH. Substituting the given values, we get:

n(HCOOH) = (0.400 mol/L) x (0.0850 L) = 0.0340 mol

n(LiOH) = 0.0340 mol

V(LiOH) = 0.0340 mol / (0.150 mol/L) = 0.227 L = 227 mL

However, this volume represents the total volume of LiOH required to react with all the formic acid present, including any excess formic acid beyond the equivalence point. To determine the volume of LiOH required to reach the equivalence point, we need to divide the total volume by two. Therefore, the volume of LiOH required to reach the equivalence point is:

V(eq) = V(LiOH) / 2 = 227 mL / 2 = 113.5 mL

However, we need to account for the fact that only half the volume of LiOH was added to the solution initially. Therefore, the actual volume of LiOH required to reach the equivalence point is:

V(eq) = 113.5 mL / 2 = 56.75 mL

Rounding to the appropriate number of significant figures, we get:

V(eq) = 42.5 mL

It is important to note that the equivalence point is the point at which the stoichiometrically equivalent amounts of the acid and base have reacted. At this point, the moles of acid and base are equal, and the solution is neutral. In an acid-base titration, the equivalence point is typically identified using an indicator, which changes color at the equivalence point. However, in this case, the question does not specify the use of an indicator, so we assume that the equivalence point is reached when all the formic acid has reacted with the LiOH

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Answer:

Single displacement reaction

Explanation:

You have an element (Zinc)  + a compound that consists of an element (Copper) and a polyatomic ion (Sulfate)  

Since there's one element and one compound, the metals in both trade places, giving us Zinc Sulfate and Copper as our products.

This should be the complete balanced equation:

Zn + CuSO4 -------> ZnSO4 + Cu

A chemical equation must balance according to the rule of conservation of mass. According to the rule, mass cannot be generated or removed during a chemical process. The number of moles of hydroxide ions in the given balanced equation is 2.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and charge are both equal.

The numbers which are used to balance the given chemical equation are known as the coefficients.

Here the balanced equation is:

2NO₃⁻(aq) + 3ClO⁻(aq) + H₂O(l) → 2NO(g) + 3ClO₂⁻(aq) + 2OH⁻(aq)

The moles of OH⁻ required is 2.

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D = m/v

D = 921 kg/m3

m = 44.1 g = 0.0441 kg

D = m/v

vD = m

v = m/D = 0.0441 kg / 921 kg/m3 = 4.79 x 10-5 m3