All categories

2 years ago

Andrew drew this diagram to show a certain type of weather front. Which type of front is it?

Chemistry

1 answer:

jolli1 [7]2 years ago

5 0

Where is the diagram then I will be able to answer

You might be interested in

Glycerol is a subunit molecule of a

Schach [20]

<span>Glycerol is a sub-unit molecule of a Lipid

So, option C is your answer.

Hope this helps!
</span>

6 0

2 years ago

Which describes the elements in a given group of the periodic table?

victus00 [196]

C is the answer I think

3 0

2 years ago

3.5g of a Certain compound X, known to be made of carbon, hydrogen, and perhaps oxygen, and to have a molecular molar mass of 15

shutvik [7]

Answer:

C₅H₁₀O₅

Explanation:

1. Calculate the mass of each element in 2.78 mg of X.

(a) Mass of C

$\text{Mass of C} = \text{5.13 g CO}_{2}\times \dfrac{\text{12.01 g C}}{\text{44.01 g }\text{CO}_{2}}= \text{1.400 g C}$

(b) Mass of H

$\text{Mass of H} = \text{2.10 g H$_{2}$O}\times \dfrac{\text{2.016 g H}}{\text{18.02 g H$_{2}$O}} = \text{0.2349 g H}$

(c) Mass of O

Mass of O = 3.5 - 1.400 - 0.2349 = 1.87 g

2. Calculate the moles of each element

$\text{Moles of C = 1400 mg C}\times\dfrac{\text{1 mmol C}}{\text{12.01 mg C }} = \text{116.6 mmol C}\\\\\text{Moles of H = 234.9 mg H} \times \dfrac{\text{1 mmol H}}{\text{1.008 mg H}} = \text{233.1 mmol H}\\\\\text{Moles of O = 1870 mg O} \times \dfrac{\text{1 mmol O}}{\text{16.00 mg O}} = \text{116 mmol O}$

3. Calculate the molar ratios

Divide all moles by the smallest number of moles.

$\text{C: } \dfrac{116.6}{116.6}= 1\\\\\text{H: } \dfrac{233.1}{116.6} = 1.999\\\\\text{O: } \dfrac{116}{116.6} = 1.00$

4. Round the ratios to the nearest integer

C:H:O = 1:2:1

5. Write the empirical formula

The empirical formula is CH₂O.

6. Calculate the molecular formula.

EF Mass = (12.01 + 2.016 + 16.00) u = 30.03 u

The molecular formula is an integral multiple of the empirical formula.

MF = (EF)ₙ

$n = \dfrac{\text{MF Mass}}{\text{EF Mass }} = \dfrac{\text{150 u}}{\text{30.03 u}} = 5.00 \approx 5$

MF = (CH₂O)₅ = C₅H₁₀O₅

The molecular formula of X is C₅H₁₀O₅.

8 0

3 years ago

The acceleration of a runner who accelerates from 0 m/s to 3 m/s in 12s

Naily [24]

4 m/s^2

I hope this helps!

5 0

2 years ago

How many atoms are there in 4 moles of table sugar ?

Likurg_2 [28]

Answer: 2.408×10^24 atoms

Explanation:

Applying the formula

No. moles= (no. Of atoms)/Avogadro's number

4 = n/6.02×10^23

no. of atoms= 2.408×10^24 atoms

7 0

2 years ago