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Chemistry

Glenn Pham

Sulfur dioxide gas (SO2) reacts with excess oxygen gas (O2) and excess liquid water (H2O) to form liquid sulfuric acid (H2SO4). In the laboratory, a chemist carries out this reaction with 67.2 L of sulfur dioxide and gets 250 g of sulfuric acid.

• Write a balanced equation for the reaction.

• Calculate the theoretical yield of sulfuric acid.

• Calculate the percent yield of the reaction. (One mole of any gas occupies 22.4 L under certain conditions of temperature and pressure. Assume those conditions for this question.)

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Chemistry

Marcel Collier

Which of the following ions came from an atom that gained 2 electrons?

A. 0^2-

B. Li+

C. Mg^3+

D. N^3-

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Chemistry

Shnookie

Anesthetic gases. one type of gas mixture used in anesthesiology

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Chemistry

Wendy Casey

A student investigated the rate of reaction between sodium thiosulphate and dilute hydrochloric acid

the student placed a conical flask over a cross on a piece of paper

the student mixed the solutions in the flask

the solution went cloudy

the student timed how long it took until the cross could not be seen

the equation for the reaction is:

Na2 S2O3 (aq) + 2HCl (aq) = 2NaCl (aq) + H2O (l) + SO2 (g) + S (s)

explain why the solution goes cloudy

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Chemistry

Koko

Which has more particles, a mole of copper (Cu) atoms or a mole of neon

(Ne) atoms?

A.

Impossible to determine

B.

they both are the same

C.

Copper

D. Neon

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Chemistry

Guest

A blank is a substance that is made by combining two substances

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Chemistry

Kaila Singh

Which statement is true about your mass?

A) You would have less mass on the moon.

B) You would have less mass on the Earth.

C) You would have more mass on the Earth.

D) You would have the same mass on the Earth and moon.

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Chemistry

Lamont

To how many significant figures can the liquid density be properly reported

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Chemistry

Izabelle Castro

Where do people and other animals get energy to move around

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Chemistry

Jonah Shah

What is Sn on the periodic table of elements

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Chemistry

Nigel Dawson

Calculate the osmotic pressure of this solution.

69.7 grams of a solute with a molecular mass of 2790 grams are

dissolved in enough water to make 1.00 dm' of solution at 20 °C.

What is the osmotic pressure of the solution?

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Chemistry

Annabelle Potter

When mixing HCl (aq) and NaOH (aq) of the same concentration (1.0 m) to produce 100 mL of product solution what volume ratio produces the largest temperature change

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Chemistry

Shadow

Who was the first to state the concept of an atom?

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Chemistry

Kimberly Ortiz

Which is an example of an exit her mic process?

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Chemistry

Clarence Vincent

The most active of all the chemical elements is a halogen known as

A. iodine.

B. fluorine.

C. astatine.

D. bromine.

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