Which components do all circuits have in common? Check all that apply.

- energy source

- voltmeter

- wires

- ammeter

- device that needs electrical energy

Why is water a polar molecule and Carbon Dioxide is not?

Calculate the amount of heat (in kJ) released when 18.5 g or calcium hydroxide is formed. The molar mass of calcium hydroxide is 74.09g CaO (s) + H2O (I) - > Ca (OH) 2 (s) + 65.2 kJ A. 16.3 kJ B 260.8 kJ C 130.4 kJ D 4.18 kJ

The density of a 20.3 m ch3oh (methanol) solution is 0.858 g/ml. what is the molality of this solution? h2o is the solvent. a. 17.4 m b. 20.8 m c. 23.7 m d. 70.0 m e. 97.6 m

What is the SI base unit for time?

Science Question: Why does the same side of the moon always face Earth? The rotational period of the moon is different than one revolution around Earth. The rotational period of the moon is equal to one revolution around Earth.

Which statements correctly describe water boiling in a pot? Air bubbles from the atmosphere are being absorbed. The water's internal kinetic energy is increasing. The water is gaining internal potential energy. The water's temperature is increasing.

Biofuel is any fuel that is produced from living or once living matter in a short period of time, days, weeks, or even months.

How are revolution and year related

Read the scientific question below. "Does sunlight make plants live?" What is a likely hypothesis for the question?

A chemist is using a solution of HNO3 that has a pH of 3.75. What is [H+] for the solution?