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

What is the speed of a cheetah that travels 224 m in 8 Seconds

What physical method can separate a mixture of steel ball bearings and marbles

How would you prepare 10 ml of a 0.25% m/v hcl solution if 1% m/v hcl was available? how much 1% m/v hcl is needed? how much distilled water is used?

What are the two main sources of energy in the water cycle? hydro energy and gravitational energy kinetic energy and thermal energy gravitational energy and thermal energy gravitational energy and mechanical energy

What is responsible for the whistling sound that often accompanies fireworks?

The burning of wood in a fireplace generates heat and light in the form of flames. Which of the following terms best describes this type of reaction? a. condensation reaction b. exergonic reaction c. endergonic reaction d.

How are the number of protons and the number of neutrons related?

If a sample of copper with a density of 8.90 g/cm3 displaces 13.0 mL of water when placed in a beaker, what is its mass? a 1.46 g b. 0.685 g c. 116 g

Which statement accurately describes the origin and expansion of the universe

Conversion. 5 km to inches