How many atoms are included in a 12 gram sample of carbon 12

4. Thorium-234 has a half-life of 24.1 days. What percentage of the original thorium-234 in a sample will remain after 144.6 days?

When magnesium OMg) and sulfur (5) bond, what would be the charge of magnesium after the bond is made?

Carbon-14 has an atomic nuber of 6. Carbon has how many electrons? 20,8,6,14

Plants take in and give off gases through their stems. true or false?

What represents of the number of protons in the nucleus of an element?

if a sample if pure sodium bas a mass of 8.2 grams and sodium has an average atomic mass of 22.99 g/mol, how many sodium atoms are there in the sample?

The plunger on a bicycle pump with a 400 mL volume cylinder is depressed such that the pressure in the pump increases from 1.00 atm to 6.00 atm.

Identify the property of magma that causes it to be forced upward towards earth's surface.

Classify each of these compounds as a Brønsted-Lowry acid, a Brønsted-Lowry base, or neither. Drag each item to the appropriate bin. are these a Brønsted-Lowry acid or a Brønsted-Lowry base H2SO4, HNO2, (CH3) 3N, C3H7NH2, HF, NH3, NaBr, CCl4

If you dissolve sugar into water in a small jar, will the result be a mixture, a solution or both? Explain.