The masses of reactants is always greater than the masses of the products in a chemical reaction, because the products are combined together. TRUE FALSE

45.3 in. to millimeters

Candidates do not always need a majority of votes to win an election

Ca+HCI->CaCI2+H2, what is the reaction?

N order for a double replacement reaction to take place, the reactants must be

A circuit contains two devices that are connected in parallel. If the resistance of one of these devices is 12 ohms and the resistance of the other device is 4 ohms, the total resistance of the two devices is

Mr Smith is walking his dog. He walks for 5 minutes (300 seconds) at a speed of 1.5 m/s. His dog runs at a speed of 5 m/s for the same time. a How far does Mr Smith walk? b How far does the dog run?

Gasoline has a density of 0.749 g/mL. How many pounds does 19.2 gallons of gasoline weigh? Use significant figures. Do not enter "pounds" as part of your answer.

Which of these changes involved a physical change and not a chemical change?

Which of the following statements is true? Running an electric current through a magnet can create a magnetic field. Electric engines change electricity into magnetism. The strength of a magnetic field increases with distance.

valancy of x is 3 while that of y is 1. write a formula of the compounds when each of the seperaty combines with oxygen