How many molecules are in 12.5g of water (H20)

In some pine trees, long needles are dominant over short needles. Which of the following statements is true? 1.) A pine tree with long needles must be homozygous dominant 2.) A pine needle with short needles must be heterozygous recessive 3.

How many groups are there in the modern periodic table?

Which type of crystal system is also known as cubic, includes diamonds, and has three axes of symmetry that are at right angles to each other?

Which of the following is a nonrenewable resource? A. Petroleum B. Biomass C. Hydropower D. Solar

The SI base unit for mass is the? a. gram b. cubic centimeter c. meter d. kilogram

Model describe how you would show j. j. thomson's model of the atom using small beads and clay

Switching one substance for another is called ... ? a) displacement b) synthesis c) decomposition d) oxidation

C2h4 + O2 - CO2 + H2O If we start with 20 grams of CH4, how many moles of CO2 will form?

How does chemical energy relate to the atom and how can we use it?

A positively charged atom is known as a cation. A cation will? ... A) have more protons B) have to same number of protons and electrons. C) Be the same as a neutral atom. D) have more electrons.