Which of the following can be considered evidence of a chemical change? (Click the 4 that apply)

A. Evaportation

B. Production of a new substance

C. Production of Bubbles

D. Melting

E. Color change

F. Dissolving

G. Freezing

H. Heat is released

When you read the label on a chemical container, what are the 3 most important pieces of information? (Choose three answers.) the concentration the volume the chemical name any hazard warnings the manufacturer

Quiz 1. When a gas is heated, A all of the absorbed energy is converted to kinetic energy O B none of the energy is converted to kinetic energy Csome of the absorbed energy is converted to potential energy and some is converted to kinetic energy D

This fine-grained dark colored igneous rock is most likely to

What 987kj to calories

For the reaction at equilibrium 2so3 2so2 + o2 (dhºrxn = 198 kj/mol), increasing the reaction temperature would:

What would be the change in pressure in a sealed 10.0 L vessel due to the formation of N2 gas when the ammonium nitrite in 1.00 L of 0.500 M NH4NO2 decomposes at 25.0°C?

Read the given equation. Na2O2 + CO2 → Na2CO3 + O2 What volume of O2 gas is produced from 2.80 liters of CO2 at STP?

Drinking water may contain a low concentration of lead ion (Pb2) due to corrosion of old lead pipes. The EPA has determined that the maximum safe level of lead ion in water is 15 ppb.

A student examines the temperature and precipitation on a given day using a thermometer and a rain gauge. The student is measuring- A. temperature only B. climate only C. wind speed only D. specific weather conditions

Atoms - 1 2 3 4 Protons - 8 10 9 8 Neutrons - 10 9 9 11 Electrons - 8 10 9 8 Which two are isotopes of one another?