What is the total number of moles represented by 20 grams of CACO3

A. 0.1

B. 0.2

C. 1

D. 2

You are a scientist working on increasing the effeciciency of appliances to waste less electricity. Yoy are running experiments measuring the input, output and waste energy from devices.

describe how a physical property such as mass and texture, can change without causing a change in the substance

3. Wearing appropriate PPE cannot significantly reduce the risk of True or False antly reduce the risk of contracting HBV.

According to the kinetic theory, what is the kinetic energy of a gas molecule proportional to?

What is the second most abundant element in stars? A. iron B. helium C. oxygen D. hydrogen

What happens when the electron moves from the first energy level to the second energy level? Energy is absorbed, and an emission line is produced. Energy is released, and an emission line is produced. Energy is absorbed by the atom.

Calculate how many mg is lethal to resident Arnold who weighs 45 kg and resident Harold who weighs 96 kg. The LD50 of lead is 450 mg/kg

The specific heat of aluminum is 0.125 cal/g °C. If 12.5 grams of aluminum were heated from 20.0 °C to 100.0 °C, calories of heat energy would be absorbed by the aluminum.

What type of radioactive decay results in uranium-238 becoming thorium-234?

What is the differnce between a stimlus and a response