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frosja888 [35]
1 year ago
9

The table compares the frequency of some unknown electromagnetic waves,

Chemistry
1 answer:
Sedaia [141]1 year ago
5 0

Answer:

Wave X

Explanation:

because the lower the frequency, the longer the wave length

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How many formula units are in 9.8 grams of calcium hydroxide?
Neporo4naja [7]

Answer:

There are 9.8 ×1021. formula units in 10,005.8gCaO 

5 0
2 years ago
Cinnamon owes its flavor and odor to cinnamaldehyde (C9H8O). Determine the boiling point elevation of a solution of 92.7 mg of c
Flauer [41]

Answer:

The boiling point elevation is 3.53 °C

Explanation:

∆Tb = Kb × m

∆Tb is the boiling point elevation of the solution

Kb is the molal boiling point elevation constant of CCl4 = 5.03 °C/m

m is the molality of the solution is given by moles of solute (C9H8O) divided by mass of solvent (CCl4) in kilogram

Moles of solute = mass/MW =

mass = 92.7 mg = 92.7/1000 = 0.0927 g

MW = 132 g/mol

Moles of solute = 0.0927/132 = 7.02×10^-4 mol

Mass of solvent = 1 g = 1/1000 = 0.001 kg

m = 7.02×10^-4 mol ÷ 0.001 kg = 0.702 mol/kg

∆Tb = 5.03 × 0.702 = 3.53 °C (to 2 decimal places)

6 0
3 years ago
Which of the following could have the formula XY₂?
Savatey [412]

Answer: B

Explanation:

There is an atom of one type of element and then two atoms of another type of element.

5 0
2 years ago
Which describes the molecule below?
Ira Lisetskai [31]
C. A lipid with three unsaturated fatty acids.
(got the question correct on a test)
4 0
2 years ago
Balance the following:<br> _H2SO4 + _NaNO2 → _HNO2 + _Na2SO4
Alisiya [41]

Answer:

it is balanced

Explanation:

i solved it

4 0
3 years ago
Read 2 more answers
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