Can matter undergo both physical and chemical changes

Inside, the engine of a gasoline-powered car, chemical energy is converted primarily to which kind of energy? A. electric B. potential C. sound D. waste

3.5 grams is equivalent to how many kilograms? 3500 kg 35,000 kg 0.35 kg 0.0035 kg

Why did improvements in agriculture lead to the growth of cities?

How many moles are there in 200 grams of CI?

When a piece of magnesium is connected to an iron pipe, the iron is prevented from corroding. Which of the following is the best explanation? Magnesium reacts with the ground water to form a protective coat on the iron pipe of Mg (OH) 2.

Which of the following is not true about the importance of the carbon cycle to living things? a. Plants use carbon dioxide to make energy. b. Carbon is the second most abundant molecule in organisms. c.

Fruit flies can either have a brown body or a black body. The allele for a brown body (B) is dominant to the allele for a black body (b). A brown fruit fly was crossed with a black fruit fly as shown below.

A light-year measures the distance a light beam can travel in one year. One light-year is equal to 9 500 000 000 000 kilometers.

The first ionization energy, e, of a potassium atom is 0.696 aj. what is the wavelength of light, in nm, that is just sufficient to ionize a potassium atom? values for constants can be found here.

A gene is a to a chromosome as (A) a pea is to a pod (B) a front to a back (C) a bike is to a car (D) a building is to a window