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Chemistry

Darion Norris

To test the purity of sodium bicarbonate, you dissolve a 3.50g sample in water and add sulfuric acid. if 1.04g of carbon dioxide forms, what is the percent purity of the sodium bicarbonate?

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Chemistry

Jefferson Cantrell

a ballon is filled with 35.0 f of helum in the moring when the twmoerature is 68 f. by noon the temperature has risen to 13 f. what is the new volume of the baloon

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Chemistry

Jaeden Waters

What happens to the mass if the volume is tripled?

A: it is also tripled

B: it doesnt change

C: it is reduced to 1/3

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Chemistry

Parker Fuller

1. A student calculated the theoretical yield of BaSO4 (s) in a precipitation experiment to be 1.352 grams. When she filtered, dried, and weighed her precipitate, however, her actual yield was only 1.279 grams. Calculate the student's percent yield.

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Chemistry

Damari Hill

What is a fan-shaped feature at the mouth of a river

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Chemistry

Athena Compton

How many moles of mgbr2 are there in 118.0 g of that compound?

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Chemistry

Olive Barry

What is 99 times 100

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Chemistry

Alexis Sloan

Using complete sentences, explain how large-scale agriculture leads to increased atmospheric CO2?

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Chemistry

Donaldson

What is the trend in effective nuclear charge for elements on the periodic table?

It decreases across a period but is constant down a group.

It increases across a period but is constant down a group.

It is constant across a period but decreases down a group.

It is constant across a period but increases down a group.

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Chemistry

Conley

Which of the following is a benefit of having a standard measurement system that can be used by scientists worldwide

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Chemistry

Mona

Salt mixed in water is an example of a___

a. solution

b. heterogeneous mixture

c. colloid

d. suspension

e. pure substance

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Chemistry

Alejandro Kerr

How are intermolecular forces different from the forces that bond atoms together into molecules? How are they similar?

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Chemistry

Guest

Assuming a constant temperature which sample below would you expect to be at the highest pressure?

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Chemistry

Santos Cole

What is 16.7 cubic feet expressed in cubic centimeters

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Chemistry

Lauryn Dillon

3. Using Equation 18-5 and the pKIn value you found, determine the ratio [In-]/[HIn] at the pH in the middle of the range you studied (i. e., pH = 6.0 for bromocresol purple, pH = 7.0 for bromothymol blue, and pH = 7.7 for phenol red). Show how you accomplished this. Draw a conclusion about the relative concentrations of In - and HIn at pH values very close to the pKIn of the indicator.

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