How many grams of i2 are needed to react with 30.1 g of n2h4?

The mass of iodine gas needed to react is 477.14 g

Explanation:

To calculate the number of moles, we use the equation:

     .....(1)

Given mass of = 30.1 g

Molar mass of = 32 g/mol

Putting values in equation 1, we get:

The chemical equation for the reaction of and iodine gas follows:

By Stoichiometry of the reaction:

1 mole of reacts with 2 moles of iodine gas

So, 0.94 moles of will react with = of iodine gas

Now, calculating the mass of iodine gas by using equation 1, we get:

Molar mass of iodine gas = 253.80 g/mol

Moles of iodine gas = 1.88 moles

Putting values in equation 1, we get:

Hence, the mass of iodine gas needed to react is 477.14 g

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e