How many calories are needed to raise the temperature of 25 grams of water form 50°C to 70°C. The specific heat of water is

1cal/g °C

Oxidation state of the compound SeO2

Which of the following can be used to neutralize a sodium hydroxide (NaOH) solution? NaCl NH3 HCl Ca (OH) 2

The organic compounds that scientist use to cut, copy, and move segments of DNA are

A weak acid placed in water contains a. the same number of unionized acid molecules as a strong acid in water. b. no unionized acid molecules. c. a lower concentration of unionized acid molecules than a strong acid in water. d.

6 small glass beads are found to weigh 9.34 g. The beads are placed in a graduated cylinder filled with ethyl alcohol (density 0.78 g/mL). The reading of the liquid in the cylinder before the beads were added is 21.5 mL.

According to the kinetic molecular theory, when a gas particle hits something what will happen?

Protons and neutrons are made from which of the following? hadrons down quarks only up quarks and down quarks up quarks only

Not all of the water falls as rain, snow, or sleet evaporates. What happens to the rest of the water?

58.5 million excess electrons are inside a closed surface. What is the net electric flux through the surface?.

Nitrogen monoxide and oxygen, both colorless gases, form a red-brown gas when mixed. Nitrogen monoxide and oxygen are called the