The rock record indicates that photosynthesis began on Earth about 3.5 million years ago.

a. True

b. False

How to identify if a natural substance is mixture or compound?

When salt dissolves in water, what type of substance is formed?

Describe, in detail, how to make 2.0 liters of a 1.0 molar HCl solution from a 12.5 molar HCl stock solution.

The shape of elongated hills labeled drumlins is most useful in determining the A) Age of glaciers B) Direction of glacier movement C) Thickness of glacial ice D) Rate of glacial movement

How does a chemist count the number of particles in a given number of moles of a substance?

Part 2: Finding Speed and Height Using Energy Directions: Use the KE and GPE equations to solve for speed or height depending on the situation. 1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed? 2.

Why is conductivity be the best test to find a metal, non-metal or metalloid?

In which way does a na1 + ion differ from a neutral na atom?

Which would not be associated with stable atmospheric conditions afternoon thunder showers is the answer

Which is not a characteristic of a compound? It is a mixture of elements. It has properties that differ from its component elements. It has a fixed proportion of elements.