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3 years ago

How many moles of Fe2O3 can be made from 50 moles of Fe?

Chemistry

1 answer:

olga_2 [115]3 years ago

8 0

Answer:

25 mol.

Explanation:

The balanced chemical equation for the reaction depicted in this question is as follows:

4Fe + 3O2 → 2Fe2O3

Based on the above balanced equation, 4 moles of Fe produced 2 moles of Fe2O3.

Hence, 50 moles of Fe will produce as follows:

50 mol Fe × 2 mol Fe2O3/4 mol Fe

= 100/4

= 25 mol of Fe2O3

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How many grams of carbon dioxide will form if 5.5 g of C3H8 burns in 15 g of O2?

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C3H8+3O2--->3CO2+8H
Therefore for every 1:3 there are 3 Carbon dioxides that form. That means find the limiting reactant from the two reactants.
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5 0

3 years ago

Find the number of moles of water that can be formed if you have 170 mol of hydrogen gas and 80 mol of oxygen gas. Express your

Sav [38]

<u>Answer:</u> The amount of water that can be formed is 160 moles

<u>Explanation:</u>

We are given:

Moles of hydrogen gas = 170 moles

Moles of oxygen gas = 80 moles

The chemical equation for the reaction of hydrogen gas and oxygen gas follows:

$2H_2+O_2\rightarrow 2H_2O$

By Stoichiometry of the reaction:

1 mole of oxygen gas reacts with 2 moles of hydrogen gas

So, 80 moles of oxygen gas will react with = $\frac{2}{1}\times 80=160mol$ of hydrogen gas

As, given amount of hydrogen gas is more than the required amount. So, it is considered as an excess reagent.

Thus, oxygen gas is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

1 mole of oxygen gas produces 2 moles of water

So, 80 moles of oxygen gas will produce = $\frac{2}{1}\times 80=160moles$ of water

Hence, the amount of water that can be formed is 160 moles

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3 years ago

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Aneli [31]

Answer:

secrete cytotoxic substance which triggers apoptosis of target cell.

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Cytotoxic T cells have cell surface receptor which recognizes the antigen present on the receptor of target cell. This interaction initiates the process of killing of target cell.

After interaction cytotoxic t cell release cytotoxic substance called granzyme and perforin. Granzyme triggers apoptosis through the activation of caspases or by making the release of cytochrome c and activation of the apoptosome.

Perforin make pores in the cell and its action is similar to complement membrane attack complex. Therefore cytotoxic substances are released by Tc cells which trigger apoptosis of target cell.

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