Complete the sentence to explain why the atomic weight of carbon is reported as 12.011 in the table of elements and the periodic table in the front inside cover of the textbook.

A 7.36 g sample of copper is contaminated with a additional 0.51 g sample of zinc. suppose an atomic mass measurement was performed on this sample. What would be the measured atomic mass? 64.46 63.67 63.94 65.38

In the nitrate reduction test, only after the addition of zinc to your 24-hour incubated solutions a and b is there a color change. what does this indicate?

Iron plus lead (||) sulfate react forming iron (||) sulfate plus lead

Is the earths crust brittle? Why is this? Do the earthquakes occur in the crust? Heellp

How far can you advance in psychology?

Which of these is a chemical property? A. Mercury is a dense liquid. B. Iodine vapor has a purple color. C. Aluminum is a very conductive metal. D. Ice melts at 0°C. E. Iron rusts in wet weather.

Which of the following is not true about the importance of the carbon cycle to living things? a. Plants use carbon dioxide to make energy. b. Carbon is the second most abundant molecule in organisms. c.

Fruit flies can either have a brown body or a black body. The allele for a brown body (B) is dominant to the allele for a black body (b). A brown fruit fly was crossed with a black fruit fly as shown below.

A light-year measures the distance a light beam can travel in one year. One light-year is equal to 9 500 000 000 000 kilometers.

The first ionization energy, e, of a potassium atom is 0.696 aj. what is the wavelength of light, in nm, that is just sufficient to ionize a potassium atom? values for constants can be found here.