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Kobotan [32]
4 years ago
12

Luke can paint 91 portraits in 7 weeks. How many portraits can Luke paint in 4 weeks?7

Chemistry
1 answer:
Arada [10]4 years ago
6 0
91/7 ?/4. 91×4 is 364 divided by 7 is 52. The answer is 52
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What is a mixture of hot gasses and volcanic material that moves at highspeeds
Nadya [2.5K]

I'm pretty sure the answer is Pyroclastic flow

8 0
3 years ago
Find the molecular mass of<br>MgSO4 7H₂O.​
mario62 [17]

Answer:

MgO +H2SO4

Explanation:

use photomath

7 0
3 years ago
Ibuprofen, an aspirin substitute, has a mass percent composition of 75.69% C, 8.80% H, and 15.51% O. Calculate its empirical for
Andreas93 [3]

Answer:

C₁₃H₁₈O₂

Explanation:

Empirical formula is the simplest ratio in moles of the elements presents in the compound. Assuming a basis of 100g, we need to convert the mass of each element to moles and, find the ratio of each of these:

<em>Moles C:</em>

75.69g * (1mol / 12.01g) = 6.3 moles of C

<em>Moles H:</em>

8.80g * (1mol / 1.01g) = 8.7 moles of H

<em>Moles O:</em>

15.51g * (1mol / 16g) = 0.97 moles of O

The ratio dividing in the moles of O -Because is the element with the lower amount of moles-:

C = 6.3mol / 0.97mol = 6.5

H = 8.7mol / 0.97mol = 9

O = 0.97mol / 0.97mol = 1

As the ratio must be in whole-numbers, multiplying in 2:

C = 13;

H = 18

O = 2

And empirical formula is:

<h3>C₁₃H₁₈O₂</h3>
7 0
3 years ago
If animals could talk, which animal would be the most annoying?
raketka [301]

Answer:

Birds or maybe a sloth or maybe cats or Rooster or Dogs. Well some Birds already talk but like they talk a lot.  Sloths they are slow and imagine having a sloth making the same slow motion sounds all day. Or cats Asking for food. Rooster Wake up really early just imagine if it could talk. Now Dogs barking at you but instead of barking imagine them screaming at you. I'm Gonna eat you full.

Explanation:

5 0
3 years ago
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Predict the formula for Ba+2 and S-2
prisoha [69]
I believe it is BaS I hope this helps! 
3 0
3 years ago
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