You leave a piece of bread outside for a few days. It forms green and blue mold. It smells awful. A chemical change has occurred - True or False?

Explain with facts

It requires1200 kg of coal to produce the energy needed to make 1.0 kg of aluminum metal. If a single soda can requires approximately 15 g of Al, what mass of coal would be needed to produce a 6-pack of cans?

When a thermometer is placed in a beaker of warm water, the liquid rises. Why does this happen?

Identify the structure that protects and gives support to this plant cell. A) vacuole B) cell wall C) cytoskeleton

Typical household bleach has a pH of 13. What is the H3O + concentration in household bleach?

10. When a 13.6 g sample of a compound containing only magnesium and oxygen is decomposed, 5.4 g of oxygen is obtained. What is the percent of magnesium in this sample? • 5.4 g / 13.6 g * 100 • (13.6 g - 5.4g) / 13.6 g x 100 • (13.6 g - 5.

Identify the following: 1. The only 2 liquid elements. 2. The element in period 4, group 0. 3. The second metalloid in period 4. 4. The first element in group 4A.

You are about to open a container of soy milk but notice that there are instructions to "shake well before serving." the soy milk is most likely a

Give reason: a. Fractionating columns with beads are used for fractional distillation b. Crystallisation is a better technique than evaporation

How can a gardener remedy soil that is overly acidic?

True or false everything has the same amount of energy?