Qual a massa, em gramas, de duas moléculas de CH4? C = 12g H = 1g

Resposta: 5,31x10^-23

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Determine the [oh-] of a solution that is 0.260 m in hco-3.

How is a bunsen burner different than burning a candle?

What must always be true if a covalent bond is to be polar?

Identify each of the following energy exchanges as primarily heat or work and determine whether the sign of is positive or negative for the system. a. A rolling billiard ball collides with another billiard ball.

How many grams of KNO3 will be required to prepare 800 mL of 1.4 M KNO3?

Which is the atomic number of an atom with six valence electrons

O2 + CS2 → CO2 + SO2 Which of the following shows the equation balanced?

Convert 970. mm Hg to atm.

The addition of a catalyst in a chemical reaction (A) increases the concentration of products at equilibrium. (B) increases the fraction of reactant molecules with a given kinetic energy.

Is fire hot or cold?