What is the mole ratio of Fe3O4 to Fe?

Nitrogen makes up 78.08% of the volume of Earth's atmosphere, and oxygen makes up 20.95% of the volume. The total air pressure at sea level is 101.3 kPa. From this information, what can be calculated? A.

A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a volume of 77.0 mL. What is the density of the gold?

Which is the electron configuration for nobelium (No) ? [Rn]7s25f14 [Rn]7s25f7 [Ne]3s23p7 [Xe]6s25d1

Consider the reaction between hydrazine and hydrogen to produce ammonia, N2H4 (g) + H2 (g) →2NH3 (g). Use enthalpies of formation and bond enthalpies to estimate the enthalpy of the nitrogen-nitrogen bond in N2H4.

Waianapanapa Beach in Hawaii is a black sand beach that was formed by waves question against volcanic rock the sand can be very hot on sunny days which statement best explains why

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?

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