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3 years ago

_ and ___ are necessary for rusting.

Chemistry

2 answers:

Anastaziya [24]3 years ago

3 0

Answer :-

<h3>Water and Air are necessary for rusting .</h3>

Evgen [1.6K]3 years ago

3 0

Answer:

Water and Oxygen are necessary for rusting.

Explanation:

<h2>HOPE IT HELPS U!!!! </h2>

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Choose the thermochemical equation that illustrates ΔH°f for Li2SO4. Choose the thermochemical equation that illustrates ΔH°f fo

Deffense [45]

Answer:

2Li(s) + ⅛S₈(s, rhombic) + 2O₂(g) → Li₂SO₄(s)

Explanation:

A thermochemical equation must show the formation of 1 mol of a substance from its elements in their most stable state,.

The only equation that meets those conditions is the last one.

A and B are wrong , because they show Li₂SO₄ as a reactant, not a product.

C is wrong because Li⁺ and SO₄²⁻ are not elements.

D is wrong because it shows the formation of 8 mol of Li₂SO₄.

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3 years ago

Which of the following correctly describes a compound?

Oksi-84 [34.3K]

I think its c, it makes sense to me to be c

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3 years ago

Read 2 more answers

10.

Andru [333]

Answer: 1.8 moles Fe and 2.7 moles $CO_2$ are produced.

Explanation:

The balanced chemical reaction is:

$Fe_2O_3+3CO\rightarrow 2Fe+3CO_2$

According to stoichiometry :

3 moles of $CO$ require 1 mole of $Fe_2O_3$

Thus 2.7 moles of $CO$ will require= $\frac{1}{3}\times 2.7=0.9moles$ of $Fe_2O_3$

Thus $CO$ is the limiting reagent as it limits the formation of product and $Fe_2O_3$ is the excess reagent.

As 3 moles of $CO$ give = 2 moles of $Fe$ and 3 moles of $CO_2$

Thus 2.7 moles of $CO$ will give = $\frac{2}{3}\times 2.7=1.8moles$ of $Fe$ and $\frac{3}{3}\times 2.7=2.7moles$ of $CO_2$

Thus 1.8 moles Fe and 2.7 moles $CO_2$ are produced.

7 0

3 years ago

6. Calculate the molarity if 35.0 grams of KBr are dissolved in 700. ml?

olga55 [171]

Answer:

To calculate molarity, divide the number of moles of solute by the volume of the solution in liters. If you don't know the number of moles of solute but you know the mass, start by finding the molar mass of the solute, which is equal to all of the molar masses of each element in the solution added together.

Explanation:

try starting with 35.0 and dived it by the volume

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3 years ago

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What should each experiment only have one of?

Ket [755]

Answer: varriable

Explanation:meaning one element, feature or factor able to change

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3 years ago

_____ and _______ are necessary for rusting.​

_ and ___ are necessary for rusting.