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2 years ago

In need of some help with this question please~

Chemistry

1 answer:

NeTakaya2 years ago

5 0

Answer:

5.60 Liters at STP

Explanation:

First you need the balanced reaction equation

2 H2 + O2 ====> 2 H2O

4 g of oxygen ( O<u>2</u> ) is 4/(15.999*2) moles of O2 (using periodic table)

Twice the number of moles of H2O re produced (from equation)

at STP the volume of a mole of gas is 22.4 liter/ mole

put all of this together

2 * 4 / (15.999*2) moles * 22.4 L/mole = 5.60 L

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Why do atoms connect to eachother?

satela [25.4K]

Answer:

electrons can bond atoms together

Explanation:

when two atoms share electrons,they are locked together by that sharing.These are called covalent bonds...but when an atom gives one of its electrons to another atom ,they are held together by electric forces.HOPE THAT HELPED☺

7 0

3 years ago

Read 2 more answers

8. If you have 100 ml of 10X Buffer A, how could you prepare 450 ml of 1 X buffer A?

lakkis [162]

We have that you can you prepare 450 ml of 1 X buffer A by adding 45ml of 10X buffer A with 405ml(450-45) of water

From the question we are told

If you have 100 ml of 10X Buffer A, how could you prepare 450 ml of 1 X buffer A

Generally the equation for the Concentration Volume relationship is mathematically given as

$C1V1=C2V2\\\\Where\\\\C1=10X\\\\C2=1X buffer A\\\\V2=450ml \\\\Therefore\\\\V1=\frac{450*1}{10}\\\\V1=45ml$

Therefore

You can you prepare 450 ml of 1 X buffer A by adding 45ml of 10X buffer A with 405ml(450-45) of water

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brainly.com/question/17756498

6 0

2 years ago

Look at the picture

Trava [24]

C is the answer did y get it right

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3 years ago

Why is knowing the density of water important to us? Give a reasonable answer

Ahat [919]

Measuring density is very important for many different industries because the density measurement will help determine the characteristics of a material, for example, whether the material will float or sink. Knowing the density of a material helps in determining the mass and volume of a material, all of which are extremely important measurements in all industries.

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Related questions (More answers below)

8 0

2 years ago

The solubility of nitrogen gas at 25 ◦C and 1 atm is 6.8×10−4 mol/L. If the partial pressure of nitrogen gas in air is 0.76 atm,

iris [78.8K]

Answer:

Concentration of dissolved nitrogen = 5.2 × 10⁻⁴ mol/L

Explanation:

More the pressure of the gas, more will be its solubility.

So, for two different pressure, the relation between them is shown below as:-

$\frac {P_1}{C_1}=\frac {P_2}{C_2}$

Given ,

P₁ = 1 atm

P₂ = 0.76 atm

C₁ = 6.8 × 10⁻⁴ mol/L

C₂ = ?

Using above equation as:

$\frac{1\ atm}{6.8\times 10^{-4}\ mol/L}=\frac{0.76\ atm}{C_2}$

$C_2=\frac{0.76\times 6.8\times 10^{-4}}{1}\ mol/L$

<u>Concentration of dissolved nitrogen = 5.2 × 10⁻⁴ mol/L</u>

5 0

3 years ago