A balloon contains 6.0 moles of helium. A hole lets 4.0 moles of helium escape the balloon. How many atoms of helium remain in the balloon?

A. 2.0 atoms

B. 1.2 x10^24 atoms

C. 6.02 x 10^24 atoms

D. 6.0 Atoms

How does a combustion reaction differ from other types of chemical reactions?

3. Consider the transport of galactose across a semi-permeable membrane from the extracellular space ([galactose] = 2 mM) to the cytosol ([galactose] = 10 mM) under biochemically standard conditions. (R = 0.08206 L atm/mol K = 8.

At a certain temperature, 0.4011 mol of N 2 and 1.501 mol of H 2 are placed in a 3.00 L container. N 2 (g) + 3 H 2 (g) - ⇀ ↽ - 2 NH 3 (g) At equilibrium, 0.1801 mol of N 2 is present. Calculate the equilibrium constant, K c. K c =

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Which of the following is true of gas? A gas is not compressed because of the low intermolecular forces. a gas does not easily mix with other gases becasye of the high density of substances as gases.

The balanced equation for the generation of sugar from sunlight water and co2 is

Isotopes of the same element have different ... A. Positions on the periodic table b. atomic numbers C. Mass number

How many moles of O2 are needed to make 1.98 moles of SO3

How many protons are in the nucleus of isotopes L?

What is the empirical formula for a compound that contains 38.77% Cl and 61.23% O?