Respitory system is responsible for the exchange of oxygen in conjunction with which other system to control breathing in humans?

a) muscular

b) circulatory

c) respiatory

d) endocrine

During a titration experiment water and salt are produced from 120.4 x 10²² molecules of Ca (OH) 2 reacting with 1.5 moles (HCI): a.) Write out the balanced equation b.) What is the limiting reagent? c.) How much mass of each product is produced?

Which principle best explains how this thermometer works? (1) A liquid changes to a gas when heated. (2) A gas changes to a liquid when heated. (3) A liquid expands when heated and contracts when cooled.

How do you do empirical formula

What kind of molecule is table sugar? a. Monosaccharide c. Trisaccharide b. Disaccharide d. Octosaccharide

An acid can be defined as a. a proton acceptor. b. a proton donor. c. neither a proton donor nor a proton acceptor. d. both a proton donor and a proton acceptor.

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda