When a substance goes directly from solid state to a gaseous state as dry ice does?

What is a disadvantage to hydropower dams? A. Not every place is close to the ocean. B. People and animals can lose their homes to flooding. C. Not every place receives many hours of direct sunlight. D. Many pollutants are put into the air.

Bubbling or fizzing is an indicator of property change phase change physical change chemical change

C + O2 - -> CO2 + 60kJ is the reaction exothermic or endothermic?

A beaker contains two solutions of salt dissolved in water. The two solutions have different concentrations of salt (measured by molarity, M) and are separated by a membrane that is permeable to both salt and water.

The displacement method is used to find the volume of irregularly shaped objects. Question 10 options: True False

The sun is composed entirely of oxygen and helium True or False?

What is the oxidation number for Mn in Mn2O7? (provide sign and number)

If you have 9900 g of donuts, how many donuts do you have if each donut has a mass of 150 g?

Particles which revolve around nucleus are called

If you collect, organize and interpret you data properly, you will always be able to draw a logical conclusion