A (a) is a pure substance that cant be broken down into simpler substances by chemical or physical means

a) element

b) mineral

c) chemical

d) atom

What is the mass of 1.5 moles of CO2?

Which compound has the highest precent composition by mass of strontium? A) SrCl2 B) SrI2 C) SrO D) SrS

In the 1920s, Edwin looked at the spectra of stars from distant galaxies. To his surprise, he found that all of these spectra were red-shifted, and that the more distant the galaxy, the greater the red shift.

Which statememt best describes a mole

When do foods not need to have their temperature measured?

If the human body were a car, glucose would be:

Which part of the circulatory system contains blood rich in carbon dioxide (1) arteries (2) alveoli (3) veins (4) capillaries

Andrea was watching her brother in the ocean and noticed that the waves were coming into the beach at a frequency of 0.571429 Hz. How many waves hit the beach in 28 s? Answer in units of waves.

How many chloride ions are needed to cancel the 2 + charge of magnesium in magnesium chloride?

How many liters of air are in: A) a room that measures 10.0 ft * 11.0 ft and has an 8.00 ft ceiling? B) a room that measures 11.0 ft x 11.0 ft and has a 10.0 ft ceiling? 1 in. = 2.54 cm (exactly); 1 L = 103cm3