What is the mass, in grams, of 1.20x10^25 atoms of calcium?

If you add a chunk of zinc to a beaker of acid and zinc shavings to another beaker of acid, the sample with the zinc shavings will react faster.

When a field is declared static, there will be: A. a copy of the field in each class object B. only one copy of the field in memory C. a copy of the field for each static method in the class D. only two copies of the field in memory

A dilute solution of co2 in water contains 0.000540 g of co2 per 500.0 g of solution. What is the concentration of co2 in ppb?

Hydrogen bonding is an important intermolecular force in which of the following compounds: HF, CH3CH3, CH3OH, and H2S?

How have useful traits been accumulated in plants and animals over the centuries?

A couple is planning to have a child. The father - to-be has six fingers, a dominant trait. His genotype is Ff. His wife has five fingers. What are the odds that their child will have six fingers? a. There is not enough information. b. 1/2 c. 7/8 d.

Osmium has a density of 22.6 g/cm3. What volume (in cm3) would be occupied by a 21.8 g sample of osmium? 1.04 2.03 * 103 493 0.965 2.03 * 10-3

Zinc reacts with hydrochloric acid according to the reaction equation Zn (s) + 2 HCl (aq) ⟶ ZnCl 2 (aq) + H 2 (g) How many milliliters of 5.00 M HCl (aq) are required to react with 3.15 g Zn (s) ?

What two things makes a chemical reaction other than coke and mentos, vinegar and baking soda and alkaline metal and water

If i burn steel wool inside a closed jar or bottle will the oxygen be completly gone