In order for a substance to change from a liquid to a gas,

heat must be taken away

heat must be added

heat could be either added or taken away

heat must be kept constant

Four properties of water are listed. 1. It reacts with halogens to form oxygen gas as one of the products. 2. It is transparent and tasteless in its pure form. 3. It freezes at a temperature of 0 °C and lower. 4.

Which wave can be transmitted through empty space

A few pieces of dry ice, CO2 (s), at - 78°C are placed in a flask that contains air at 21°C. The flask is sealed by placing an uninflated balloon over the mouth of the flask.

Is tantalum radioactive?

How many zn atoms are contained in 922 g of zn

Which was the limiting reactant: the zinc or the hydrochloric acid? Remember that the limiting reactant is completely consumed in a reaction and no new product is formed unless more of the limiting reactant is added.

How many moles are in 4,55 X 10^23 molecules of CO2 (rounded)

In standardization of NaOH solution, a student found that 25.55cm3 of base neutralized exactly 21.35cm3 of 0.12M HCl. Find the molarity of the NaOH.

Which is a base unit in SI? A. centimeter B. kilogram C. gram D. grams/milliliter

The primary mechanism for converting atmospheric carbon into usable forms for life on earth is achieved by