A bucket of muddy water is an example of a (n):

1) homogeneous mixture

2) heterogeneous mixture

3) compound

4) element

How is nuclear energy produced?

The quantity of heat required to change the temperature of 1 g of a substance by 1°c is defined as

When a radioactive isotope releases an alpha particle, the mass number of the atom is a. decreased by two. b. decreased by four. c. increased by two. d. increased by four.

Which of the following for an object should be known to calculate its density? a) the heat present in it b) the amount of matter in it c) the force of gravity acting on it d) space between object and another object

What hydrocarbons burn completely in an excess of oxygen, the products are A) carbon monoxide and water B) carbon dioxide and water C) carbon monoxide and carbon dioxide D) carbon dioxide and carbon

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?

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