A sample composed only of atoms having the same atomic number is classified as

1. A compound

2. A solution

3. An element

4. An isomer

Which of the following are observations Pick all correct choices The candle floats. The tires are flat. The dog is barking. The tire is flat because of a decrease in temperature. If a person walks by, then the dog will bark.

22.4 liters is the same as: cm3 and mL

a dairy farm a hairless cow with a cow that had hair. the offspring had hair. assess whether you can conclude that the gene for hairlessness is dominate or recessive answer.

When carbon-14 undergoes beta decay, it becomes which of the following? oxygen-13 + a beta particle nitrogen-14 + a beta particle carbon-13 + a beta particle boron-14 + a beta particle?

Which tool has been used since the 1930s to guide government policy about the economy? A. Externalities B. wealth index C. gross domestic product D. natural resource reserves

Do all liquids freeze at the same rate

Convert 1.67 x10^24 atoms of carbon to moles of carbon

The knowledge of chemistry not important in one of the following? A, in agriculture B, in Geology C, in medicine D, none

Which is the balanced equation for: Al2O3 + Fe - Fe3O4 + AL

Why are lab apparatus made of ceramics