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Anna007 [38]
4 years ago
14

Which type of wave does not require a medium to travel through?

Chemistry
1 answer:
nlexa [21]4 years ago
8 0

Hello,

I'm not very sure but I think the correct answer is D) Water Wave

I really hope this helps!!!! Happy Holidays!!!! (:

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Calculate the number of grams of xenon in 4.658 g of the compound xenon tetrafluoride.
andrezito [222]

Answer:

The mass of xenon in the compound is 2.950 grams

Explanation:

Step 1: Data given

Mass of XeF4 = 4.658 grams

Molar mass of XeF4 = 207.28 g/mol

Step 2: Calculate moles of XeF4

Moles XeF4 = mass XeF4 / molar mass XeF4

Moles XeF4 = 4.658 grams / 207.28 g/mol

Moles XeF4 = 0.02247 moles

Step 3: Calculate moles of xenon

XeF4 → Xe + 4F-

For 1 mol xenon tetrafluoride, we have 1 mol of xenon

For 0.02247 moles XeF4 we have 0.02247 moles Xe

Step 4: Calculate mass of xenon

Mass xenon = moles xenon * molar mass xenon

Mass xenon = 0.02247 moles * 131.29 g/mol

Mass xenon = 2.950 grams

The mass of xenon in the compound is 2.950 grams

5 0
4 years ago
Hydrogen has three isotopes with mass numbers of 1, 2, and 3 and has an average atomic mass of 1.00794 amu. This information ind
ki77a [65]

Answer:its actually 3 trust me

Explanation:

7 0
3 years ago
Read 2 more answers
How many orbitals are there in the n = 4 level of the h-atom?
Nikolay [14]

The H-atom has fourth energy level with n=4.

This energy level can have values of orbital angular momentum l = 0, 1, 2, 3

Now each l can also have magnetic momentum ml from – l to l.

Therefore,

l = 0

<span>ml = 0 </span>

l = 1

ml = -1, 0, 1

l = 2

ml = -2, -1, 0, 1, 2

l = 3

ml = -3, -2, -1, 0, 1, 2, 3

Now adding up all the number of ml’s will give us the total number of orbitals:

orbitals = 1 + 3 + 5 + 7

orbitals = 16

 

Alternatively, we can simply use the formula:

<span>orbitals = n^2 = 4^2 = 16</span>

8 0
3 years ago
What mass of oxygen is needed for the complete combustion of 6.90x10-3g of methane?<br> Svane
maks197457 [2]

Answer:

<em>Mass of oxygen needed for complete combustion of 6.90 x 10 -03 g CH4 = 2.753 x 10 -02 g</em>

7 0
3 years ago
Combining hydrogen and oxygen to make water is a physical change
shutvik [7]

id say physical cause your changing the physical form of the molucles

3 0
3 years ago
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