1. Explain with reasons why burning of paper is a chemical change.

If heat energy is removed from a sample of water the water will most likely?

A sample of barium nitrate is placed into a jar containing water. The mass of the barium nitrate sample is 27g. Assume the water is at 20 degrees C and the resulting barium nitrate solution is saturated. What mass of water is present in the jar?

Describe the results of a chemical change

11. What geologic feature do we find at the following coordinates: 47 degrees north latitude and 120 degrees west longitude?

According to The Evolution of Useful Things, what caused the popularity of Post-it notes? a prior need for them their varied styles widespread availability their varied uses

What's the difference between Mixture and Solution?

Which describes the alkalaine solution? A) pH less than 7 B) pH equal to seven C) basic D) acidic

Limestone is primarily a crystal form of caco 3 . How many moles of oxygen are in a 1.25 mol sample of caco 3 ? Only include the numerical value in your answer. Do not include units.

The expression of 5522 km in scientific notation is

Gallium crystallizes in a primitive cubic unit cell. The length of an edge of this cube is 362 pm. What is the radius of a gallium atom?