Chemistry » Page 66

Chemistry

Judah Williamson

A student has a solution with a pH of 7. The student adds HF, hydrogen floride, to the solution, hoping to increases the pH of the solution. What is wrong with this student's approach?

Select one: A. You cannot change the pH of a solution. B. HF is an acid, so it will lower the pH of the solution. C. The pH of the solution is already as high as possible. D. The pH is 7, so the solution is already as acidic as possible.

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Chemistry

Kaylyn Cohen

What is more likely to happen if wetlands are drained?

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Chemistry

Isabell Hogan

A) If you weigh a hydrated compound before and after heating it. Do you expect the mass to be

more or less than before heating? Explain why.

b) How about if you weigh a bag of popcorn before and after heating it. Does the popped corn

weigh more or less than the unpopped kernels? Explain why.

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Chemistry

Kaleb Hampton

Define the term relative molecular mass

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Chemistry

Janelle Greer

It took many of the metals several minutes to begin to react. Once the reaction was initiated, several of these metals continued to react quite vigorously. What was the most probable cause of this delayed reaction? (Hint: The metal getting hot isn't the only reason.)

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Chemistry

Kamari Fitzpatrick

What dose the smooth ER do

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Chemistry

Leonardo Brandt

How many valence electrons are in each atom?

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Chemistry

Kennedi Farrell

77.60 ml of. 210 M NaOH are required to neutralize 25.05 ml

ofH2SO4 solution in a titrationexperiment.

Calculate the molarity and normality of

theH2SO4 solution.

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Chemistry

Rachael Norton

A 25.0 g bold made of an alloy absorbed 250 J of heat as its temperature changed from 25.0 °C to 78.0 °C. What is the specific heat of the alloy?

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Chemistry

Lorena

How is an areas topography determined?

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Chemistry

Melanie Williams

How to put a solution back into solution when it comes out of solution chemistry?

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Chemistry

Quintin Powell

When the isotonic saline solution described in part A is connected to an unknown solution via a semipermeable membrane, the unknown solution level drops. Based on this information, what can be said about these two solutions?

A) The two solutions have the same concentration.

B) The unknown solution had the lower concentration.

C) The unknown solution had the higher concentration.

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Chemistry

Izaiah Leon

What is the best estimate and range for 22 20 18 24 21 23

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Chemistry

Caleb Vaughn

19 How many moles of Cly are produced from 1 mole of CCle.

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Chemistry

Charlize Lloyd

Which question can be answered using the scientific method?

A) Which dog food is best for healthy teeth?

B) What color is the most attractive?

C) What is my purpose in life?

D) Which flower smells the best?

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