How long has there been life on earth?

a. 4.6 billion years,

b. 3.7 billion years,

c. 65 million years,

d. 3 million years

Based on the balanced chemical equation shown below, determine the mass percent of fe3 + in a 0. strings_1450g sample of iron ore, if 22.40 ml of a 0.

i have a question about atoms. How would i find electrons when the atomic number is the number of protons and electrons?

What is the difference between an incendiary fire and an accidental fire

Identify the gas particle that travels the slowest. ne h2 co n2 o2

What experiment led to the discovery of the nucleus

Based on sulubility rules, which of the followingwill occur when solutions of ZnSO4 (aq) andMgCl2 (aq) are mixed? Write the NIE if aprecipitation is considered likely. A. ZnCl2 wil precipitate; Mg2andSO42_ will be spectatior ions. B.

Can somewhere show me the dimensional analysis of this? The pressure inside of a can is 245mmHg. What is the pressure in kPa?

How does the molecular property of water affect its cohesive properties?

Which organism is able to cause an infection? A red blood cell B bacteria C white blood cell D skin cell

What is x + 4 = - x - 4?