Which is the best description of what happens in a chemical reaction? A. Atoms rearrange. B. Atoms change into other atoms. C. Matter is destroyed. D. Matter is formed.

What does homogeneous mixture of elements

How many mL of 50% (v/v) alcohol should be mixed with 10% alcohol to obtain 50mL of 35% (v/v) alcohol? Round to the hundredths place.

Which of the following is true? A. Lithium is the least reactive element in group 1, because it is the smallest and holds its valence electron more tightly than the others in the same group. B.

Why is pure water neutral

The diagram represents the movement of a train from left to right, with velocity v. Which statement is true? A) The train is speeding up. B) The train is slowing down. C) The train is moving at a constant speed.

Polar covalent bonds are formed when the electrons in the bond are not shared equally between the two nuclei. which one of these molecules contains polar bonds?

The flame from my candle gives off black smoke heat and light what type of changes do these indicate

Which one of the following processes results in a decrease in the number of neutrons? corrosion electron capture gamma emission positron emission alpha emission

Calculate the root mean square velocity of F2, Cl2, and Br2 at 304 K.

The total pressure inside a 1.62 cylinder kept at 35°C is 1.15 atm. If the volume of the cylinder drops to 0.74 L and the temperature remains the same, what is the new pressure inside the cylinder?