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3 years ago

Which state of matter are particles packed tightly together and fix positions

Chemistry

2 answers:

svet-max [94.6K]3 years ago

7 0

Answer:

Solids.

Explanation:

In a solid object, particles are packed tightly together in fixed positions even if in a container.

olganol [36]3 years ago

5 0

Answer:

solids

Explanation:

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This is called a catalyst

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When 2 grams of Hydrogen (H2) react with 32 grams of Oxygen (O2) the reaction yields hydrogen peroxide (H2O2). How many grams of

Alisiya [41]

Given information:

Mass of H2 = 2 g

Mass of O2 = 32 g

To determine:

Mass of H2O2 produced

Explanation:

The reaction between H2 and O2 can be given as:

H2 + O2 → H2O2

Based on the reaction stoichiometry:

1 mole of H2 reacts with 1 mole of O2 to form 1 mole of H2O2

# moles of H2 = mass of H2 / molar mass of H2 = 2 g/ 2 g.mol-1 = 1 mole

# moles of O2 = mass of O2/ molar mass of O2 = 32 g/ 32 g.mol-1 = 1 mole

Hence for the given reactant conditions, moles of H2O2 produced = 1

Mass of H2O2 = moles of H2O2 * molar mass H2O2 = 1 mole * 34 g.mole-1 = 34 g

Ans: 34 g of H2O2 is produced in this reaction

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3 years ago

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Deep sea divers use a mixture of helium and oxygen to breathe. Assume that a diver is going to a depth of 150 feet where the tot

Svetlanka [38]

Answer:

4.525% is the percentage by volume of oxygen in the gas mixture.

Explanation:

Total pressure of the mixture = p = 4.42 atm

Partial pressure of the oxygen = $p_1=0.20 atm$

Partial pressure of the helium = $p_2$

$p_1=p\times \chi_1$ (Dalton law of partial pressure)

$0.20 atm=4.42 atm\times \chi_1$

$\chi_1=\frac{0.20 atm}{4.42 atm}=0.04525$

$\chi_2=1-\chi_1=1-0.04525=0.95475$

$chi_1+chi_2=1$

$n_1=0.04525 mol,n_2=0.95475 mol$

According Avogadro law:

$Moles\propto Volume$ (At temperature and pressure)

Volume occupied by oxygen gas = $V_1$

Total moles of gases = n = 1 mol

Total Volume of the gases = V

$\frac{n_1}{V_1}=\frac{n}{V}$

$\frac{V_1}{V}=\frac{n_1}{n}=\frac{0.04525 mol}{1 mol}$

Percent by volume of oxygen in the gas mixture:

$\frac{V_1}{V}\times 100=\frac{0.04525 mol}{1 mol}\times 100=4.525\%$

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4 years ago

At STP, which element is brittle and not a conductor of electricity

Sever21 [200]

Your answer is the element of S I think.

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