Most of the mass of an element is found in the?

1 - proton

2 - electron

3 - neutron

4 - nucleus

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When 2.3 g of na (s) reacts with excess cl2, how many grams of nacl will be produced?

Which of the following is the best choice for an accessory when dressing for work? a. A watch which makes noises and lights up b. A necklace with dozens of charms c. A polished silver ring d. A belt buckle shaped like the Statue of Liberty

A balloon with a volume of 2.0 L at 25 c is placed in a hot room at 35c. The pressure on the ballon is constant at 1.0atm. How does the volume of the balloon change after moving it to the hot room

What is the empirical formula of a substance that contains 2.64g of C, 0.444g H and 3.52g of O

An example of an atom that has no charge is one that has A. 1 proton, 2 electrons, and 3 neutrons. B. 3 protons, 1 electron, and 3 neutrons. C. 2 protons, 2 electrons, and 1 neutron. D. 3 protons, 2 electrons, and 1 neutron.

g Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water. Suppose 2.71 g of ethane is mixed with 3.8 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction.

How many molecules of atp are produced in aerobic versus anaerobic cellular respiration

Write a balanced chemical equation for the complete combustion of C3H7BO3, a gasoline additive. The products of combustion are CO2 (g), H2O (g), and B2O3 (s).

Which of the following polymers is used in plastic bottles and plastic containers? Select one: a. LDPE b. PVC c. Polystyrene d. HDPE e. Polypropylene

Which of the following statement is not true? A) The sun is involved in producing tides B) There can be two high tides in one location during a single day C) Only the oceans have tides D) If there is a high tide, there will be a low tide