Which of the following has the greatest mass, in grams?

a. 1 atom of lead (Pb)

b. 0.5 mol copper (Cu) atoms

c. 0.3 mol gold (Au) atoms

d. 25 atoms of mercury (Hg)

Do the number of protons in an atom of an element always equals its atomic weight.

To find the mass defect for uranium-238 several calculations must be made. which is the calculation that should be made first? assume atomic number for uranium-238 is 92. 92 (1.0073) x 92 (1.0087) = 92 (1.0073) x 146 (1.0087) = 146 (1.0073) x 238 (1.

Is the procedure a part of the scientific method

An ideal gas in a 1.25-gallon container is at a temperature of 125 degrees Celsius and pressure of 2.5 atmospheres. If the gas is oxygen (formula:O2 molecular weight = 32 grams per mole), what is the mass of gas in the container in units of grams?

A wide flat zone of small particles that orbit a planet. what is it

How does electronegativity affect the polarity of the bond between two atoms?

How much heat (energy) would need to be absorbed by 1.5 g of liquid water to cause a temperature change of 30.45 °C? The specific heat of water is 4.18 J/gºC.

What happens when electrons are passed from one atom to a more electronegative atom?

Calculate the k sp for zinc hydroxide if the solubility of zn (oh) 2 in pure water is 2.1 * 10-4 g/l. calculate the k sp for zinc hydroxide if the solubility of zn (oh) 2 in pure water is 2.1 * 10-4 g/l. 2.9 * 10-3 1.5 * 10-3 9.9 * 10-18 3.8 * 10-17

What is the importance of the coefficients in a balanced chemical reaction?