What do we call elements that always travel in pairs?

If one mole of a substance has a mass of 56.0 g, what is the mass of 11 nanomoles of the substance? Express your answer in nanograms using the correct number of significant figures. Do not enter your answer using scientific notation.

A sugar crystal contains approximately 2.2*1017 sucrose (c12h22o11) molecules. part a what is its mass in mg?

What is the chemical formula for cuprite?

22.4 L of a gas at a temperature of 0°C are at a pressure of 2.0 atm. How many moles of gas are contained in the sample? 0.5 mol 1.0 mol 2.0 mol 3.0 mol

A sample of nitrogen gas (N2) containing 1.5 x10^23 particles has the same number of particles as a sample containing: A. 0.50 moles Ne B. 2.0 moles He C. 1.0 moles hydrogen gas D. 25 moles oxygen gas

How do you express 0.00026 in scientific notation

All organisms need instructions to specify their traits. The instructions, or code, that is responsible for all the inherited traits of an organism.

1. Are state changes chemical or physical changes? Provide an example of a state change and explain why it is a chemical or physical change.

What is the morality of a 750.0 milliliter solution containing 2.5 miles of solute?

An electron in a sodium atom moves from the third shell to the fourth shell. This change is a result of the atom (1) absorbing energy (3) gaining an electron (2) releasing energy (4) losing an electron