Physical properties of toothpaste

Aluminum has a density of 2.70 g / cm3. What volume is occupied by a block of aluminum which weighs 4.32 kg?

The balanced equation below represents a molecule of bromine separating into two bromine atoms. Br2 → Br + Br What occurs during this change? Energy is absorbed and a bond is formed. Energy is absorbed and a bond is broken.

You and a friend each decide to build the same model airplane. After the airplanes are built, you decide to conduct an investigation to determine which airplane can glide through air the longest. Outline a plan to conduct your investigation.

10 Baking soda (NaHCO3) decomposes when it is heated according to the equation below. How many kilojoules of heat are required to decompose 1.95 mol NaHCO3 (s) ? 2NaHCO3 (s) + 1290 - Na2CO3 (s) + H20 (9) + CO2 (9) 126 13 258 129 la • 2.53 x 107

Which of the term best describe the developing country? Select the three

Why are noble metals for example Rhodium, Palladium, Platinum, and Iridium largely used in chemical manufacturing as heterogeneous catalyst?

If displacement is decreasing, then velocity is:

True or false an example of a theory is Newton's theory of gravity

What is a molecule with atoms from two or more different elements?

How do you find the percent composition of CuBr2