If a mass of a mole of H2X is 34 grams, then x must represent.. (SHOW WORK) ​

Answers

Answer 1

In the formular X repesents Sulphur

H2X = 34

mass of H = 2

( 1 ) * 2 + X = 34

X = 34 - 2

X = 32

X is an element with atomic mass of 32 which is Sulphur

hope it helps....


Related Questions

How do you determine the chemical reactivity for nonmetals by using the periodic table?

Answers

elements increase in reactivity as they go down in groups and up in periods!!

lead 2 nitrate and potassium iodide net ionic equation​

Answers

Answer:

Pb2+(aq) + l+(aq) ------------pbl2(s) net ionic equation

Explanation:

Pb(NO3)2(aq) + kI(aq)------------PbI2(s) + kNo3(aq)

Pb2+ (aq)No3-(aq) + k+(aq) l-(aq) ______PbI2(s) + k+(aq) + NO32+(aq)

Pb2+(aq) + I-(aq). ------------Pbl2(s)

A 2.74-g sample of a substance suspected of being pure gold is warmed to 72.1 oC and submerged into 15.2 g of water initially at 24.7 oC. The final temperature of the mixture is 26.3 oC. What is the heat capacity of the substance? Could the substance be pure gold?

(The specific heat capacity of water is 4.184 J/g oC)

J/g oC (Round to three significant digits)

Look up the specific heat capacity of gold.

Could the unknown substance be pure gold? Write yes or no in the following box:

Answers

1. The specific heat capacity of the sample of gold obtained is 0.81 J/gºC

2. The substance is not pure gold

1. How to determine the specific heat capacity of gold From the question given above, the following data were obtained:Mass of gold (M₉) = 2.74 gTemperature of gold (T₉) = 72.1 °CMass of water (Mᵥᵥ) = 15.2 g Temperature of water (Tᵥᵥ) = 24.7 °C Equilibrium temperature (Tₑ) = 26.3 °C Specific heat capacity of the water (Cᵥᵥ) = 4.184 J/gºC Specific heat capacity of gold (C₉) =?

The specific heat capacity of the sample of gold can be obtained as follow:

Heat loss = Heat gain

M₉C₉(M₉ –Tₑ) = MᵥᵥC(Tₑ – Tᵥᵥ)

2.74 × C₉(72.1 – 26.3) = 15.2 × 4.184 (26.3 – 24.7)

C₉ × 125.492 = 101.75488

Divide both side by 125.492

C₉ = 101.75488 / 125.492

C₉ = 0.81 J/gºC

2. How to determine if the substance is pure Specific heat capacity of gold calculated = 0.81 J/gºC Specific heat capacity of pure gold = 0.13 J/gºC

From the above we can conclude that the substance is not pure gold since the calculated and standard value of the specific heat capacity of the gold sample is not the same

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What is the density at 27 °C of 28.0 milliliters of a liquid that has a mass of 4.05 grams?

Answers

Answer:

The answer is 0.14 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 4.05 g

volume = 28 mL

We have

[tex]density = \frac{4.05}{28} \\ = 0.1446428571...[/tex]

We have the final answer as

0.14 g/mL

Hope this helps you

This is the chemical formula for acetic acid (the chemical that gives the sharp taste to vinegar):
CH. CO,H
An analytical chemist has determined by measurements that there are 4.2 moles of carbon in a sample of acetic acid. How many moles of hydrogen are in the
sample?
Be sure your answer has the correct number of significant digits.

Answers

Answer:

2.408 moles of hydrogen are in the sample.

Explanation:

Molecular formula of acetic acid =CH3COOH

Ratio of carbon to hydrogen :2/4:1/2

Measured  number of moles of carbon atoms = 1.204

Let the moles of hydrogen be = x

Number of carbon atoms in 1.204 mol = 1.204mol*Avogadro number

Number of hydrogen atoms in x mol = x*Avogadro number

As we know that ratio of carbon to hydrogen atoms is 1:2.

1/2=1.204mol* avogadro/ x* avogadro

x = 2.408 moles

2.408 moles of hydrogen are in the sample.

Pure gold has a density of 19.32g/cm^3. You find a gold ring with a mass of 6g and a volume of 0.31cm^3.is this ring pure gold?

Answers

Answer:

Yes, this ring is pure gold because when we divide the mass by the volume we get our density for the ring, which comes out to about 19.32.

Explanation:

A rock has been placed in water. The mass of the rock is 20 g. What is the rock's density?
g/mL

Answers

Answer:

0.67 g mL-1

Explanation:

Every time a problem asks you to find the density of a substance, your goal will essentially be to determine the mass of one unit of volume of said substance.

squence the steps in constructing and interpreting an electron dot diagram

Answers

43 EXPLAINION The cardiac system comes in various different shapes and sizes

Write the name for each of the following chemical formulas.
d. P3N5 (for doping semiconductors)

Answers

Answer:

Triphorphorus Pentanitride

Explanation:

since there are three phosphorus use the prefix tri-, since there are five nitrogen use the prefix penta. tri=3, penta=5. then add a suffix -ide to the end of nitrogen. that will give you triphosphorus pentanitride.

Determine the subunit composition of a protein from the following information:

a. Molecular mass by gel filtration: 200 kD
b. Molecular mass by SDS-PAGE: 100 kD
c. Molecular mass by SDS-PAGE with 2-mercaptoethanol: 40 kD and 60 kD

Answers

Answer:

Explanation:

The protein comprises of two 60-kD polypeptides and two 40-kD polypeptides. Each one of the 40-kD chains has a disulfide-bond which is directly bonded to a 60-kD chain.

The 100-kD units attach noncovalently to produce a protein with a molecular mass of 200 kD. The interaction among the different subunits in the protein is not affected by the Gel filtration chromatography.

Hence, the protein seems to be 200 kD in size. When SDS-PAGE takes place samples are being subjected to heat and therefore undergoing denaturation conditions. The aftermath effect of this causes disorganization in the 100 kD units.

However, the reducing agent (BME) main task is the reduction of disulfide bonds in a protein.

It implies that BME is responsible for the reduction between the R1-S-S-R2 bond between 40 kD and 60 kD to R1-SH and R2-SH, resulting in seperate proteins.

For the chemical reaction
2 NaOH + H2SO4 — Na2SO4 + 2H2O
how many moles of sodium sulfate will be produced from 28.3 g of sodium hydroxide?

Answers

The number of mole of sodium sulphate, Na₂SO₄ that will be produced from 28.3 g of sodium hydroxide, NaOH is 0.35 mole

How to determine the mole of NaOH Mass of NaOH = 28.3 gMolar mass of NaOH = 40 g/mol Mole of NaOH =?

Mole = mass / molar mass

Mole of NaOH = 28.3 / 40

Mole of NaOH = 0.7075 mole

How to determine the mole of Na₂SO₄ produced

2NaOH + H₂SO₄ —> Na₂SO₄ + H₂O

From the balanced equation above,

2 moles of NaOH reacted to produce 1 mole of Na₂SO₄.

Therefore,

0.7075 mole of NaOH will react to produce = (0.7075 × 1) / 2 = 0.35 mole of Na₂SO₄

Thus, 0.35 mole of Na₂SO₄ was obtained from the reaction

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At 600. K how many moles of gas are in a 1.00 L cylinder at atmospheric pressure?

Answers

Answer:

0.02moles

Explanation:

To answer this question, the general gas law equation is used. The General gas law is:

Pv = nRT

Where; P = standard atmospheric pressure (1 atm)

V = volume (L)

n = number of moles

R = Gas law constant

T = Temperature

For this question; volume = 1.00L, atmospheric pressure (P) = 1 atm, R = 0.0821 L-atm / mol K, T = 600K, n = ?

Therefore; Pv = nRT

n = PV/RT

n = 1 × 1/ 0.0821 × 600

n = 1/49.26

n = 0.0203moles

Hence, there are 0.02 moles of gas.

The number of mole of the gas present in the cylinder is 0.02 mole

From the question given above, the following data were:

Temperature (T) = 600 K

Volume (V) = 1 L

Pressure (P) = 1 atm

Number of mole (n) =?

The number of mole of the gas present in the cylinder can be obtained by using the ideal gas equation (PV = nRT) as illustrated below:

Temperature (T) = 600 K

Volume (V) = 1 L

Pressure (P) = 1 atm

Gas constant (R) = 0.0821 atm.L/Kmol

Number of mole (n) =?

PV = nRT

1 × 1 = n × 0.0821 × 600

1 = n × 49.26

Divide both side by 49.26

[tex]n = \frac{1}{49.26}\\\\[/tex]

n = 0.02 mole

Thus, 0.02 mole of the gas is present in the cylinder.

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Help please I need help fast.

Answers

Answer:

d) It incorrectly describes the two processes

Hope it helps you

And please mark it as the brainliest answer

Explain what happens to the imidazole side chain of histidine in a buffer of pH 4.0 and at pH 10.2.

Answers

Histidine, an essential amino acid, has as a positively charged imidazole functional group. The imidazole makes it a common participant in enzyme catalyzed reactions. The unprotonated imidazole is nucleophilic and can serve as a general base, while the protonated form can serve as a general acid.

HELP PLZ!!! A sample contains only the compound CaCl2 and water. When it is dried, its weight decreases from 5.00g to 4.24g. What is the mass percentage of water in the original sample? Round to three significant figures.

Answers

Answer:is 15.2%

Explanation:

Got it wrong and this the correct answer it told me

The percentage of water in the original sample is 15.2 %.

From the information provided in the question;

Weight of the wet sample = 5.00g

Weight of the dried sample = 4.24g

Loss in mass =  5.00g - 4.24g = 0.76 g

percentage of water in the original sample = Difference in mass between wet and dry sample/ mass of wet sample × 100/1

Hence, when we substitute values;

percentage of water in the original sample =  0.76 g/5.00g × 100/1

percentage of water in the original sample = 15.2 %

So, the percentage of water in the original sample is 15.2 %.

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how does temperature affect solubility​

Answers

Answer:

The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.

Explanation:

Solubility is affected by temperature due to heatness.

How do you know what’s inside of an atom

Answers

Answer:

microscope

Explanation:

What is the rate law for the following mechanism? Step 1: A + B = C (fast) Step 2: B + C=D (slow) Rate = k*​

Answers

Answer:

The rate law is

rate

=k[A][B]^2

If the molecular weight of horseradish peroxidase is about 44,000 g/mol, how many moles of enzyme are used per mole of vanillin?

Answers

What is when the molecular weight of horseradish peroxidase is about 44,000 g/mol, The number of moles of the enzyme used per mole of vanillin is

ME=289.188moles

What is the number of moles of the enzyme used per mole of vanillin?

Generally, the equation for the moles of the enzyme  is mathematically given as

[tex]ME=\frac{molecular weight}{vanilin MW}[/tex]

Therefore

ME=44000/152.15

ME=289.188moles

In conclusion, the number of moles of the enzyme is

ME=289.188moles

Read more about Molarity

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Number of electrons for all of these even the ones with a number by them ? Will give brain-list!!!!

Answers

Explanation:

s=2

p=6

d=10

f=14

I hope this was helpful

What would happen to the density of a mass of air that is heated?

Would that mass of air rise above and float on top of cooler air above it or would it sink down below cooler air below it? (Assume that the majority of the masses do not mix.)

Answers

Answer: As air is heated its density decreases because its mass remains constant but its volume increases. As air is cooled, its density increases because its mass remains constant but its volume decreases. ... The decrease in density as air is heated causes it to rise above cooler, more dense air. Hope this helped.

How many grams are in 2.3 moles of Aluminum

Answers

Answer:

62.1 gram

Explanation:

Al molar mass = 27 g/mol

mass = molar mass × no of moles

= 27 × 2.3 = 62.1 gram

What is the slope of the line on the graph?

Answers

Answer:

6

Explanation:

slope= [tex]\frac{rise}{run}[/tex]

slope=[tex]\frac{6}{1}[/tex]

slope=6

Answer:

its one half

Explanation:

i learned this last week

the # molecules in 52.1 grams of NH4OH

Answers

Answer:

Explanation:

Hey there!

From question;

The molecular mass of NH₄OH is 35.

Avogadro number = 6.023*10²³ molecules.

Then,

From mole concept,

Molecular mass =  Avogadro number

So, 35 grams contains  6.023*10²³ molecules.

1 gram contains [tex]\frac{ 6.023*10^{23} }{35}[/tex] molecules.

52.1 grams contains [tex]\frac{6.023*10^{23} }{35} *52.1[/tex] molecules.

Therefore, 52.1 grams contains 8.96*10²³ molecules.

Hope it helps!

SOMEONE PLEASE HELP I WILL Mark u BRAINLIST

Answers

Answer:

answer 7.4 atm

Explanation:

i did this and got it correct

What's meant by chemistry

Answers

Answer: Chemistry is the properties, composition, and structure of elements and compounds, how they can change, and the energy that is released or absorbed when they change.

Explanation:

Answer:

The scientific study of the structure of substances and what happens to them in different conditions or when mixed with each other is known as Chemistry.

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Calculate the molarity of solution of "sodium sulfate" that contains 5.2 grams sodiums sulfate diluted to 500mL

Answers

Taking into account the definition of molarity, the molarity of solution of sodium sulfate is 0.0732 [tex]\frac{moles}{liter}[/tex].

Definition of molarity

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

[tex]Molarity=\frac{number of moles}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

Molarity of solution of sodium sulfate.

In this case, you have:

number of moles of sodium sulfate= [tex]5.2 grams\frac{1 mole}{142 grams} = 0.0366 moles[/tex] (being 142 g/mole the molar mass of sodiums sulfate)volume= 500 mL= 0.5 L (being 1000 mL= 1 L)

Replacing in the definition of molarity:

[tex]Molarity=\frac{0.0366 moles}{0.5 L}[/tex]

Solving:

Molarity= 0.0732 [tex]\frac{moles}{liter}[/tex]

Finally, the molarity of solution of sodium sulfate is 0.0732 [tex]\frac{moles}{liter}[/tex].

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How many moles of Co would be required to react with 6.14m of P4

Answers

The number of moles of Co that would be required to react with 6.14 moles of P4 would be 36.84 moles

Stoichiometric calculations

From the equation of the reaction:

6Co + P4 → 2Co3P2

For every 1 mole of P4, 6 moles of Co is required for complete reaction.

Thus, the mole of Co that would be needed for 6.14 moles of P4 would be:

                      6 x 6.14 = 36.84 moles

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What are the basis of making symbols of an element?​

Answers

Each element is given its own chemical symbol, like H for hydrogen or O for oxygen. Chemical symbols are usually one or two letters long. Every chemical symbol starts with a capital letter, with the second letter written in lower case. For example, Mg is the correct symbol for magnesium, but mg, mG and MG are wrong...

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Mg + AgNO3 MgNO3 + Ag

How many grams of magnesium are needed to produce 5.0 moles of silver

Answers

Answer:

539.35 g

Explanation:

molar mass of Mg = moles of Ag * molar mass of Ag

x = 5 * 107.87

x = 539.35 g

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