We're did the pollution from acid rain and the factory eventually end up

Which formula is an empirical formula? a) C4H10 b) C3H6 c) CH4 d) C2H6 (the numbers should be smaller)

Which of the following types of stars is the coolest?

What is the chemical formula of carbon

Define the word sunlight

How many valance electrons are there in group 10?

What is the power of a kitchen blender if it can perform 3750 joules of work in 15 seconds?

A 75.00 g a sample of a substance is analyzed and found to consist of 32.73 g phosphorus and 42.7 g oxygen. calculate the percent composition of this substance.

Which one of the following melts the fastest: rectangular prism, cylinder, and rectangular trapezoidal trough?

A 1.8-mL volume of seawater contains about 4.0 * 10^-10 g of gold. The total volume of ocean water is about 1.5 * 10^21 L. Calculate the total worth of all the gold in the world's oceans if the price of gold is $19.

Why are numbers placed before the elements and molecules in a chemical equation?