You collect 14.2 liters of CO gas from an experiment. How many molecules would be in the sample?

Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 5.40 moles moles of magnesium perchlorate, Mg(ClO4)2Mg

nexus9112 [7]

Answer:Moles of Mg, Cl, 0 = 5.40, 10.80, 43.2

Explanation:

1 mole of Mg(ClO4)2 contains 1 mole of Magnesium, Mg atoms

2 Moles of Chlorine, Cl atoms

8 Molresof Oxygen atoms

Such that to find the number of moles of each element, We have that

------1 mole Magnesum atoms/ 1 mol of Mg(ClO4)2 x 5.40 moles of magnesium perchlorate, Mg(ClO4)2 = 1 x 5.40 =5.40 moles

------2 moles ofChlorine atoms/ 1 mol of Mg(ClO4)2 x 5.40 moles of magnesium perchlorate, Mg(ClO4)2 = 2 x 5.40 = 10.80 moles

------8 moles Oxygen atoms/ 1 mol of Mg(ClO4)2 x 5.40 moles of magnesium perchlorate, Mg(ClO4)2 = 8 x 5.40 = 43.2 moles

4 0

3 years ago

classify the following compounds as ionic (metal + nonmetal) , covalent (nonmetal + nonmetal) or both (compound containing a pol

Savatey [412]

Answer:

11. ionic

12. both

13. covalent

14. ionic

Explanation:

7 0

3 years ago

Chromium(III) oxide reacts with hydrogen sulfide (H₂S) gas to form chromium(III) sulfide and water:

Vladimir79 [104]

From the stoichiometry of the reaction 214.71 g of H₂S is required.

The equation of the reaction is;

Cr₂O₃(s) + 3H₂S(g) ⟶Cr₂S₃(s) + 3H₂O(l)

Number of moles of Cr₂S₃ produced :

= 421 g/200 g/mol

= 2.105 moles

From the balanced reaction equation;

3 moles of H₂S produced 1 mole of Cr₂S₃

x moles of H₂S is required to produce 2.105 moles moles of Cr₂S₃

x = 3 moles × 2.105 moles/1 mole

= 6.315 moles of H₂S

Hence;

Mass of H₂S required

= 6.315 moles of H₂S × 34 g/mol

=214.71 g

What is the molar mass?

The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10²³ atoms, molecules, or formula units of that substance.

Is molar mass and atomic mass same?

Molar mass is the mass of the one mole of the compound whereas atomic mass is the mass of the individual unit of the compound. Basically, molar mass is the mass of an average of many elements of the compound and atomic mass is the mass of the atom.

Learn more about stoichiometry reaction :

brainly.com/question/16060223

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5 0

2 years ago

Which of the following would DECREASE the rate of a reaction?

tia_tia [17]

Answer: increasing volume

Explanation: adding a catalyst would increase reaction time and increasing INCREASING concentration definently makes reaction time alot faster increasing pressure actually makes it more concentrated, so no it is not

8 0

2 years ago

Uranium, an important component of both nuclear weapons and nuclearreactors, has two major isotopes, U-238, which has a half-lif

elixir [45]

Answer:

Hello your question is poorly written below is the well written question

Uranium, an important component of both nuclear weapons and nuclear reactors, has two major isotopes, U-238, which has a half-life of approximately 4.5 billion years, and U-235, which has a half-life of approximately 700 million years. Both were present in equal amounts at the time of the creation of the Earth, 4.5 billion years ago. How many years after the creation of the Earth had the amount of radiation from uranium decayed to half the amount present at the time of the creation of the Earth

Answer : 140 billion years

Explanation:

Given that :

U-238 h1/2 = 4.5 billion years

U-235 h1/2 = 700 million years

At the beginning both Isotopes where present in equal amount

Determine the T years before the amount of Uranium decays to Half

T = ? N'2 = N1 / 2

we know that N = No ( 1/2 )^h where h = time / half-life time

attached below is the detailed solution of the given problem

6 0

2 years ago