What are three ways simple machines give us an advantage

What is the main reason scientists perform experiments a) to summarize experimental information b) to collect scientific data c) to find answers to their questions d) to play with equipment in the lab

What are all the elements to the left of the zigzag line in a periodic table called?

The synthesis of methanol from carbon monoxide and hydrogen gas is described by the following chemical equation: CO (g) + 2H2 (g) ? CH3OH (g) The equilibrium constant for this reaction at 25? Cis Kc=2.3*104.

The sequence in which energy sublevels are filled is specified by

To vaporize 2.00g of ammonia, 656 calories are required. How many kilojoules are required to vaporize the same mass of ammonia?

How many valence electrons are in atom of sulfur?

My sister needs this answered! Donald is creating an experiment to determine if fertilizer affects plant color. He makes this statement: "If each plant receives a different amount of fertilizer, then the plant's color intensity will change.

What would happen to life if earth were in a different location within the solar system

Substance that undergoes a change in a chemical reaction is a. a product c. a reactant. b. a chemical. d. an enzyme.

List the number of protons, neutrons, and electrons in Iodine-127. (atomic number is 53)