2. When do chemical reactions happen?

O

When matter changes states

O

When water freezes into ice

O

When atoms gain, lose, or share electrons

O

When water boils

The specific heat for liquid ethanol is 2.46 J / (g•°C). When 210 g of ethanol is cooled from 50 °C to 5 °C, the surrounding 7.80 x 103 g of air absorbs the heat. The specific heat of air is 1.01J / (9•°C).

Question 5 1 pts Burning or converting food or fuel to generate energy is called sleeping being metabolic dieting exercising

Which substance is most compressible? A. a molten metal B. a salt crystal C. boiling water D. water vapor

Which mineral has the chemical formula Fe2O3?

A sample of water with a mass of 587.00 kg is heated with 87 kJ of energy to a temperature of 518.4 K. The specific heat of water is 1 J-1 kg K-1. What is the initial temperature of the water?

Which statements are true about the linear inequality y > x - 2? Check all that apply

How is the Gobi Desert different from the Sahara Desert

Which average wind speed do areas need to effectively power wind farms? A:1 mph B:5 mph C:10 mph D:16 mph

What is the total number of moles represented by 20 grams of CACO3 A. 0.1 B. 0.2 C. 1 D. 2

Which describes the polarity in a water molecule? a). partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms b).