Which of the following methods will usually cause a reaction to speed up? Combining the reactants at a lower temperature. Reducing the concentration of reactants. Grinding one of the reactants into a powder. Removing the catalyst.

How many molecules of CaCL2 are equivalent to 75.9g CaCl2

Why is carbon monoxide especially dangerous?

Eva is in a closed, dark room. She uses her arm muscles to turn on a lamp. When she moves her hand closer to the lamp, the light heats her hand. The light bounces off the pages of a book and into her eyes.

A system is a group of related parts with specific roles that work together to achieve an observed result. Seeds, soil, a plow, and a large field are parts of what type of system? A. an agricultural system B. an organ system C. a legal system D.

The hypothetical explosion that created the universe is called the big bash. true or false

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda