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3 years ago

PLEASE HELP!! I WILL MARK THE 1st ONE BRAINLIEST!

Chemistry

1 answer:

allsm [11]3 years ago

6 0

Answer:

I hope you do well on the test good luck

Explanation:

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How many moles are there in 5.699 liters of neon gas at STP? Express your answer with the appropriate significant figures and un

Svetradugi [14.3K]

Answer:

The number of moles: 0.25442 moles

Explanation:

One mole of Neon gas will occupy 22.4 at STP.

5.699L consists of $\frac{5.699}{22.4}$ = 0.25442 moles.

4 0

3 years ago

What part of the water cycle involves the leaves of plants

zvonat [6]

Answer: The answer to this question is transpiration.

Explanation: I know this answer because i looked it up in a book. The other explanation is I study about this a lot.

5 0

3 years ago

Propane burns according to the following equation:

GarryVolchara [31]

Answer:

a. 324 mL is the volume of CO₂ measured

b. 0.223 moles of carbonate

Explanation:

a. We determine the moles of used O₂ by the Ideal Gases Law

STP are 1 atm of pressure and 273.15K of T°

We convert the volume from mL to L → 0.465 mL . 1L/ 1000 mL = 0.465 L

Now, we replace data: 1 atm . 0465L = n . 0.082 . 273.15K

1 atm . 0465L / 0.082 . 273.15K = n → 0.0207 moles

The balanced combustion is: C₃H₈(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(g)

Ratio is 5:3. 5 moles of oxygen are needed to produce 3 moles of CO₂

Then 0.0207 moles must produce (0.0207 . 3) / 5 = 0.0124 moles of CO₂

Let's apply again the Ideal Gases Law. Firstly we convert:

37°C + 273.15K = 310.15K

98.59kPa . 1atm / 101.3 kPa = 0.973 atm

0.973atm . V = 0.0124 mol . 0.082 . 310.15K

V = (0.0124 mol . 0.082 . 310.15K) / 0.973atm = 0.324 L → 324 mL

b. The reaction is: CaCO₃(s) → CaO(s) + CO₂(g)

We used the Ideal Gases Law to determine the moles of produced CO₂

P . V = n . R . T → P .V / R . T = n

We replace data: 1 atm . 5L / 0.082 . 273.15K = 0.223 moles

As ratio is 1:1, 0.223 moles of CO₂ were produced by the decomposition of 0.223 moles of carbonate

6 0

3 years ago

BRAINLIESTTT ASAP! PLEASE HELP ME :)<br><br> Don't mind my answer... I clicked on it by accident.

MatroZZZ [7]

Answer:

○ Both electrons of Mg should be transferred to one O atom because the formula is MgO.

Explanation:

First, figure out the charges of each element:

Oxygen → Group 16 [−2]

Magnesium → Group 2 (Alkaline Earth Metals) [+2]

In this case, both charges are one-to-one, meaning they cancel each other out [opposite of each other], giving you this, from metal to non-metal:

$Mg^{+2}O^{-2} → MgO$

I am joyous to assist you anytime.

4 0

3 years ago

Which of the following devices provides the most protection against a contaminated environment?

Mumz [18]

Is there multiple choice?

4 0

3 years ago

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