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Lady_Fox [76]
3 years ago
11

Mikayla says that air is an element since it has oxygen in it. Jose says that air is a mixture because each part of air keeps it

s properties. Grant says that both Mikayla and Jose are wrong, because air is a compound. Who is correct and why? Group of answer choices
Chemistry
1 answer:
tatyana61 [14]3 years ago
5 0

Answer: Jose is correct because air is a mixture of gases ( both elements and compounds).

Explanation:

An element consist of only one type of atom and a compound made up of 2 or more types of elements joined together ( by ionic or covalent bonds).

Whereas air around us is a mixture of gases (both elements and compounds) like nitrogen, oxygen, argon, and carbon dioxide, and very small amounts of other gases and water vapors

Hence, Jose is correct because air is a mixture of gases ( both elements and compounds).

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How many moles are in 153’pp grams of KClO3
katen-ka-za [31]

Answer:

n = 1.24 moles

Explanation:

Given that,

Mass = 153 grams

Molar mass of KClO₃ = 122.55 g/mol

We need to find the number of moles.

We know that,

No. of moles = given mass/molar mass

So,

n=\dfrac{153}{122.55 }\\\\n=1.24

So, there are 1.24 moles in 153 g of KClO₃.

4 0
3 years ago
Let’s assume that you put a balloon into the freezer. Initially,the balloon had 3.0liters of gas at a pressure of 400kPa and was
EastWind [94]
Here, we should use combined gas law which can be derived from combined gas law, “PV=nRT”. Rearranging, we can get PV/T=nR. Then we can set the two states in the problem together to get

P1V1/T1 = P2V2/T2

Then just plug in and solve algebraically.

Hope this helps
6 0
3 years ago
Which piece of equipment should be used to measure 12 mL of DI water?
irga5000 [103]
100 mL graduated cylinder because the device is more precise.
6 0
4 years ago
Who was the first to propose the idea of atoms?
inessss [21]
Democritus<span> first suggested the existence of the atom.</span>
4 0
4 years ago
Read 2 more answers
Ethyl alcohol has a heat of vaporization of 850. J/g. What mass of ethyl alcohol can be boiled using 15000 J of energy?
Verdich [7]
The amount of heat, H, needed to boil off certain mass, m, of the substance is given by the equation,
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Substituting the known values,
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Thus, the mass of ethyl alcohol is approximately 17.65 g. 
3 0
4 years ago
Read 2 more answers
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