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2 years ago

What is the total pressure when 0.400 g of H2, 2.00 g of N2, and 10.5 g of CO2 are injected into a 10.0 liter flask at 273 K?

Chemistry

1 answer:

kodGreya [7K]2 years ago

7 0

Answer:

0.93 atm is the total pressure for the mixture

Explanation:

In a mixture of gases, we can apply the Ideal Gases Law to determine the total pressure.

Total pressure . V = Total moles . R. T

Let's find out the total moles. Therefore, we must convert the mass to moles:

0.4 g / 2 g/mol = 0.200 mol

2 g / 28g/mol = 0.0714 mol

10.5 g / 44g/mol = 0.238 mol

Total moles = 0.200 + 0.143 + 0.0714 → 0.4144 moles

We replace the data to the formula

Total pressure . 10L = 0.4144 moles . 0.082 L.atm/mol.K . 273K

Total pressure = (0.4144 moles . 0.082 L.atm/mol.K . 273K) / 10L

Total pressure = 0.93 atm

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What types of mixtures are these? a cup of tea and sugar peanuts and almonds mixed together in a bowl a bucket full of sand and

Allushta [10]

Answer:

The answer to your question is below

Explanation:

There are two kinds of mixtures

- Homogeneous is a mixture of two or more elements or compounds and its components can not be distinguished visually.

- Heterogeneous is a mixture of two or more elements or compounds and its components can be distinguished visually.

a cup of tea and sugar homogeneous

peanuts and almonds mixed together in a bowl heterogeneous

a bucket full of sand and gravel heterogeneous

food coloring dissolved in water homogeneous

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2 years ago

Enter the expression 14/7N+α, where α is the lowercase Greek letter alpha. Express your answer as a chemical expression.

Marizza181 [45]

Answer:

¹⁴₇N + ⁴₂He → ¹⁷ ₈O + ¹₁p

Explanation:

¹⁴₇N represents the isotope of nitrogen-14, where the superscript 14 to the left of the chemical symbol of the element is the mass number (number of protons and neutrons) and the subscripst 7 is the atomic number (number of protons).

α is used to represent alpha particles. Alpha particles are nucleus of helium, ⁴₂He: mass number 4, atomic number 2,

The expression ¹⁴₇N + α represents a nuclear reaction: the nucleus of the isotope of nitrogen-14 (¹⁴₇N) is hit by α-particles ( ⁴₂He).

As result, the nucleus of ¹⁴₇N absorbs 1 proton, increasing its atomic number and mass number in 1, becoming ¹⁷ ₈O. In this process, also one proton is produced.

The total reaction is represented by ¹⁴₇N + ⁴₂He → ¹⁷ ₈O + ¹₁p, where you can verify the mass balance:

Mass numbers: 14 + 4 = 17 + 1 = 18.

Number of protons: 7 + 2 = 8 + 1 = 9.

8 0

2 years ago

Read 2 more answers

The density of methanol is 0.7918g/mL. Calculate the mass of 89.9mL of this liquid.

Novosadov [1.4K]

The mass is 71.2 g.

Mass = 89.9 mL × $\frac{0.7918 g}{1 mL}$ = 71.2 g

4 0

2 years ago

A 17.0-g sample of hf is dissolved in water to give 2.0 x 10 2 ml of solution. the concentration of the solution is:

fredd [130]

The concentration of the solution is 4.25 M

Explanation

molarity=moles/volume in liters

moles = mass/molar mass
molar mass of HF = 19 + 1 = 20 g/mol
moles is therefore = 17.0 g/ 20 g/mol = 0.85 moles

volume in liters = 2 x10^2ml/1000 = 0.2 liters

therefore molarity = 0.85/0.2 = 4.25 M

8 0

2 years ago

Read 2 more answers

Calcium reacts with bromine to form calcium bromide. 2.1 Which atom will lose electrons? 2.2 How many electrons will it lose? 2.

Juli2301 [7.4K]

Answer:

For 2.1: Calcium atom will loose electrons.

For 2.2: It will loose 2 electrons.

For 2.3: Bromine atom will gain electrons.

For 2.4: It will gain 1 electron.

For 2.5: The ions formed are $Ca^{2+}\text{ and }Br^-$

For 2.6: The chemical formula is $CaBr_2$

Explanation:

Calcium bromide is formed by the combination of calcium and bromine atoms. This compound is ionic compound because electrons get transferred from one atom to another atom.

Calcium is the 20th element of the periodic table. It is a metal and it looses its electrons. The electronic configuration for this element is $1s^22s^22p^63s^23p^64s^2$

This element will loose 2 electrons and forms $Ca^{2+}$ ion.

Bromine is the 35th element of the periodic table. It is a non-metal and it gains electrons. The electronic configuration for this element is $[Ar]4s^23d^{10}4p^5$

This element will gain 1 electron and forms $Br^-$ ion.

The chemical formula for the given compound is $CaBr_2$

8 0

2 years ago