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Sergeu [11.5K]
2 years ago
6

How do changes in temperature and activation energy compare in how they

Chemistry
2 answers:
Shkiper50 [21]2 years ago
7 0

Answer:

The answer is d

Explanation:

vaieri [72.5K]2 years ago
4 0

Answer: D

Explanation:

Ap3x

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Fe + O2 —&gt; Fe2O3<br><br> can someone pls help me balance this??
zimovet [89]

Answer:

4Fe + 3O2 → 2Fe2O3

5 0
2 years ago
How many moles of oxygen atoms are in 1.2x10^25 diphosphorus pentoxide molecules
insens350 [35]

Answer:

19.9 atoms

Explanation:

Grams --- Moles --- Atoms

You're converting from atoms (molecules) to moles.

You do not have to calculate the mass of "di phosphorus pentoxide."

Since you're already given 1.2x10^25 atoms, you start with that. You need to cancel out the atoms, so you need Avogadro's number as shown in the image.

(This has nothing to do with the problem) But in case if you're wondering, the "di" in phosphorus means there's 2 phosphorus and the "pent" means that there are 5 oxygens. So P2O5. Go to your periodic table, multiply their respective atomic masses. You would multiply phosphorus twice and oxygen 5 times. And add them up to get the overall mass.

I hope this helped!

3 0
2 years ago
According to Hund's rule, what's the expected magnetic behavior of vanadium (V)?
vodka [1.7K]

Answer:

C. paramagnetic.

Explanation:

1s2 2s2 2p6 3s2 3p6 4s2 3d3 It is Vanadium.

It has 3 unpaired d- electrons, so it is paramagnetic.

6 0
3 years ago
The burning of paper is an example of which type of change?
Setler [38]

Answer: B. A chemical Change

Explanation:

The Burning of paper changes the paper into a new substance (ash). So the ashes cannot be reversed into paper, therefore it is a chemical change.

7 0
2 years ago
What mass of li3po4 is needed to prepare 500 ml of a solution having a lithium ion concentration of 0.175 m?
otez555 [7]
M(Li₃PO₄)=115.8 g/mol
c(Li⁺)=0.175 mol/L
v=500 mL= 0/5 L

n(Li⁺)=3n(Li₃PO₄)=3m(Li₃PO₄)/M(Li₃PO₄)=c(Li⁺)v

m(Li₃PO₄)=c(Li⁺)vM(Li₃PO₄)/3

m(Li₃PO₄)=0.175*0.5*115.8/3=3.3775* g


*Solubility lithium phosphate in water about 0,34 g/L. Litium phosphate can be dissolved in solution of a phosphoric acid. For example:

2Li₃PO₄(s) + H₃PO₄(aq) = 3Li₂HPO₄(aq)

3 0
3 years ago
Read 2 more answers
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