How many atoms of helium are in a balloon, which contains 0.47 moles of the gas?

How does waters polarity contribute to the fact that water expands when it freezes?

What items are true about a block of ice at - 10°C as you continue to apply heat You can select more than one 1. It's temperature will rise continuously until it completely melts 2. It's temperature will rise until reaching 0°C 3.

Dr. Hakoda is studying tsunamis-large waves that can reach heights of 1,700 feet. Tsunamis are often caused when large chunks of ocean floor displace vast amounts of water deep in the ocean during an earthquake.

What is chemical symbol for potassium

Social class is defined as a group of people with similar levels of wealth, power, and prestige. a group of people of the same sex, race, and ethnicity. a group of people with nothing in common. a group of people of the same age.

Which one is a true statement about endothermic reactions? A. Energy from an outside source is continuously being added. B. More heat is given off than is put into the reaction. C. The reactants have less heat energy than the last products. D.

How is the partial pressure of a gas in a mixture calculated?

Part II. Formulas From Names Write the chemical formula of the covalent compounds below. 11. Carbon dioxide CO2

Spell out the full name of the compound Cl2O7

True or False. When covalent bonds are formed between atoms having different electronegativities, the electrons tend to spend less time at the atom with the greater electronegativity. Such chemical bonds are called polar covalent bonds.