A piece of magnesium ribbon reacts with hydrochloric acid to produce magnesium chloride. what is the empirical formula of the compound, that is 25.3% magnesium and 74.7% chlorine.

What is the bond type of CaO

A sample of ideal gas is in a sealed container. The pressure of the gas is 485 torr, and the temperature is 40 ∘C.

Which polyatomic ion contains the greatest number of oxygen atoms? (1) acetate (3) hydroxide (2) carbonate (4) peroxide

Hydrogen is 99% hydrogen-1; 0.8% hydrogen-2; and 0.2% hydrogen-3. calculate it's average atomic mass

Use the drop-down menus to select the correct answer for each statement. Current is the variable. Voltage is the variable. This graph shows a (an) relationship. A current of 0.04 A gives a voltage of V. A voltage of 2 V corresponds to a current of A.

All organisms need instructions to specify their traits. The instructions, or code, that is responsible for all the inherited traits of an organism.

1. Are state changes chemical or physical changes? Provide an example of a state change and explain why it is a chemical or physical change.

What is the morality of a 750.0 milliliter solution containing 2.5 miles of solute?

An electron in a sodium atom moves from the third shell to the fourth shell. This change is a result of the atom (1) absorbing energy (3) gaining an electron (2) releasing energy (4) losing an electron

Which of the following best describes how erosion by groundwater might create a landform? A. Slightly acidic water dissolves Serbian rocks underground to form a cavern B.