Use the values of A, which follow to answer the questions below.
H=1; C = 12; N= 14; O = 16; Ne = 20; Na = 23;
Mg = 24; S = 32; K= 39; Fe = 56; Cu= 63.5; Zn = 65.
One mole of any gas at rtp occupies 24 dm3.
1 Calculate the number of moles in:
a 2g of neon atoms
b 4g of magnesium atoms
( 24g of carbon atoms.

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

What is the molecular formula for a compound that is 46.16% carbon, 5.16% hydrogen, and 48.68% fluorine? the molar mass of the compound is 156.12 g/mol

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123