The gas usually filled in the electric bulb is? 1. nitrogen 2. hydrogen 3. carbon dioxide 4. oxygen

Earth's ozone layer is most effective at filtering out what kind of radiation? A. UV-A radiation B. UV-B radiation C. UV-C radiation D. both a and b

A compound that contains 63.15% carbon, 5.30% hydrogen and the remaining percent oxygen

what is the average atomic mass of 125 atoms of uranium if there are 10 atomd of U-234, 75 atoms of U-235, and 40 atoms of U-238?

What is an distance force

Consider the balanced equation below. N2H4 + 2H2O2 → N2 + 4H2O What are the mole ratios of hydrazine (N2H4) to hydrogen peroxide (H2O2) and hydrazine to water? 1:2 and 1:4 1:3 and 1:4 1:2 and 3:5 1:3 and 3:5

What happens when a hydrogen atom acts like a nonmetal in a chemical reaction? a. It gains an electron. c. It loses an electron. b. It loses a neutron. d. It gains a neutron.

Which of the following is a n o n i n f e c t i o u s disease that affects the respiratory system a influenza b cold c asthma d parkinson's

Which is a family with nonmetals whose atoms gain or share one electron in chemical reactions

Franklin was performing an experiment by combining hydrochloric acid and sodium hydroxide. He measured the mass of his reactant materials to be 35g. The reaction resulted in the production of salt and water. He reported that his products weighed 32g.

Think about a wooden chair and a balloon. what do these two objects always have in common?