Chemistry, 21.12.2020 07:30 quickestlearner5694

19. H2O, CO2, CaCl2, and Na2CO3 (the numbers are subscripts) are all examples of that tell which atoms and how much of each atom is needed to make a molecule of a substance. A. chemical formulas
B. types of atoms
C. elements

Answers: 3

Show answers

Other questions on the subject: Chemistry

Chemistry, 22.06.2019 08:30, microwave13016

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Answers: 1

continue

Chemistry, 23.06.2019 04:20, tyrickdavis1

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.

Answers: 1

continue

Chemistry, 23.06.2019 06:20, sw2098

Is water wet? my friends are debating.

Answers: 2

continue

Chemistry, 23.06.2019 06:30, madelineb6243

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction

Answers: 3

continue

You know the right answer?

19. H2O, CO2, CaCl2, and Na2CO3 (the numbers are subscripts) are all examples of that tell which ato...