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3 years ago

Can someone help? Ill give brainliest!

Chemistry

1 answer:

Darya [45]3 years ago

5 0

Answer:

It does follow the law of conservation of mass.

Explanation:

You start with 4 phosphorous atoms and 6 oxygen atoms, you end with 4 phosphorous atoms and 6 oxygen atoms.

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how many liters of O2 are needed to produce 5.62 g of SO2 in the following reaction? 4FeS2+11O2 ->2Fe2O3+8SO2

Liula [17]

8moles of SO_2 need 11mol O_2

1mol need=11/8=1.4molO_2

Moles of sO_2

$\\ \rm\hookrightarrow \dfrac{5.62}{64}=0.1$

Moles of O_2

1.4(0.1)=0.14mol

We know

1mol at STP=22.4L
1.4mol=0.14(22.4)=3.13L O_2

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3 years ago

Classify the following items based on the type of polymer they are made from: raincoats and leather shoes.

Karolina [17]

In order to clasify these based on the type of polymer they are made from, we can say that B. <span>Leather shoes are made from natural polymers; raincoats are made from synthetic polymers, is the most accurate option from the ones you are giving me. Hope this is useful</span>

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3 years ago

How many oxygen atoms are contained in the following chemical formula? 2agno3

sesenic [268]

It would be: 2*3 = 6 oxygen atoms

OPTION D IS YOUR ANSWER......

7 0

4 years ago

Name two compounds with more exothermic lattice energies than scandium oxide and justify your choice.

N76 [4]

Answer:

1 . $Al_2O_3$

2. $TiO_2$

Explanation:

The more stable the ionic compound, the more is it lattice energy.

The more the charge on the cation and the anion, the greater is the lattice energy.
The less the size of the cation and the anion, the greater is the lattice energy.

Scandium oxide ( $Sc_2O_3$ ) is an oxide in which $Sc^{3+}$ behaves as cation and $O^{2-}$ behaves as anion.

The compounds which has higher lattice energy than scandium oxide are:

1 . $Al_2O_3$

This is because the charge are same on the cation and the anion as in the case of the Scandium oxide but the size of the cation $Al^{3+}$ is smaller than $Sc^{3+}$ . Thus, this corresponds to higher lattice energy.

2. $TiO_2$

This is because the charge on the cation $Ti^{4+}$ is greater than that of $Sc^{3+}$ and also the size of the cation $Ti^{4+}$ is smaller than $Sc^{3+}$ . Thus, this corresponds to higher lattice energy.

3 0

3 years ago

What is stoichiometry used for

Dennis_Churaev [7]

Answer:

Stoichiometry measures these quantitative relationships, and is used to determine the amount of products and reactants that are produced or needed in a given reaction.

3 0

4 years ago

Read 2 more answers