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Chemistry

Guest

Is this reaction endothermic or exothermic

d) NH4NO3 (s)  NH4 + (aq) + NO3 - (aq) [Note, this is the reaction that takes place in a cold pack]

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Chemistry

Miriam

Who developed a system of classifying organisms by genus and species

A) Darwin

B) Linnaeus

C) Watson

D) Mendel

P. S. - This is Science not Chemistry

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Chemistry

Ana Gilmore

Describe how formal charges are used to choose between possible molecular structures

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Chemistry

Braxton Callahan

What is the difference between a strong and weak base? select the best choice below to explain the difference. choose one:

a. strong bases are strong electrolytes and are completely ionized in solution. weak bases are weak electrolytes and produce limited quantities of the hydrogen ion h + (aq).

b. strong bases are strong electrolytes and are completely ionized in solution. weak bases are weak electrolytes and are only partially ionized in solution.

c. strong bases are strong electrolytes and produce abundant quantities of the hydrogen ion h + (aq). weak bases are weak electrolytes and are only partially ionized in solution.

d. none of the above.

e. strong bases are strong electrolytes and are partially ionized in solution. weak bases are weak electrolytes and are completely ionized in solution?

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Chemistry

Terrance Mcbride

The Molecule Is ___

A) Symmetrical and Polar

B) Symmetrical and non polar

C) Asymmetrical and polar

D) Asymmetrical and non polar

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Chemistry

Levine

Fill in the blanks:

Note: both blanks are the same word

The weight on an object depends on its (blank) and the (blank) of earth.

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Chemistry

Whiz

Why would putting argon and pottassium in order of there atomic masses be wrong

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Chemistry

Daphne Baxter

How many moles of calcium chloride (CaCl2) are needed to react completely with 6.2 moles of silver nitrate (AgNO3) ?

2AgNO3 + CaCl2 → 2AgCl + Ca (NO3) 2

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Chemistry

Maxwell Black

A block of aluminum has the dimensions: length 5cm, width 3cm and height 1cm and weighs 40.5 g. What is its density?

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Chemistry

Joseph Wheeler

Balance this equation

Pb (NO3) 2+Na2 (CrO4) = Pb (CtO4) + Na (NO3)

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Chemistry

Trevor Russo

Is yeast the same as baking powder

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Chemistry

Jan Dickerson

List the four components of natural gas in order of increasing strength of intermolecular forces.

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Chemistry

Dakota Dunlap

In what type of reaction or process does heat flow into the system?

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Chemistry

Pranav

Which statements describes Newton's law of universal gravitation?

A. Mass has little effect on gravity between objects

B. Gravity pushes objects away from Earth's center

C. Gravity does not act between Earth and the moon

D. Every object in the universe attracts every other object

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Chemistry

Ty Kline

What does it mean for a strong base to be in equilibrium?

The position of equilibrium lies far to the right, with products being favored.

The position of equilibrium lies far to the left, with products being favored.

There is a great deal of base and very few ions.

There is an equal amount of reactants and products.

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