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photoshop1234 [79]
2 years ago
8

50 + 50 - 25 x 0 + 5 + 5 =​

Chemistry
2 answers:
Contact [7]2 years ago
7 0
USE PEMDAS

50+50-25x0+5+5

first do any multiplication which is 25x0 and that equals 0

50+50+5+5

now just add and the total is 110
Morgarella [4.7K]2 years ago
5 0
Answer :

110



Explanation : my brain
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13. What is the total pressure inside the container​
nasty-shy [4]

<u>Answer:</u> The total pressure inside the container is 77.9 kPa

<u>Explanation:</u>

Dalton's law of partial pressure states that the total pressure of the system is equal to the sum of partial pressure of each component present in it.

To calculate the total pressure inside the container, we use the law given by Dalton, which is:

P_T=p_{N_2}+p_{O_2}+p_{Ar}

We are given:

Vapor pressure of oxygen gas, p_{O_2} = 40.9 kPa

Vapor pressure of nitrogen gas, p_{N_2} = 23.3 kPa

Vapor pressure of argon, p_{Ar} = 13.7 kPa

Putting values in above equation, we get:

p_T=23.3+40.9+13.7\\\\p_{T}=77.9kPa

Hence, the total pressure inside the container is 77.9 kPa

7 0
3 years ago
Oxygen gas is collected over water. The atmospheric pressure is 748 mmHg, and the temperature of the oxygen is 29 ºC. The pressu
KonstantinChe [14]

The pressure of the oxygen gas collected : 718 mmHg

<h3>Further explanation</h3>

Given

P tot = 748 mmHg

P water vapour = 30 mmHg

Required

P Oxygen

Solution

Dalton's law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases

Can be formulated:

P tot = P1 + P2 + P3 ....

The partial pressure is the pressure of each gas in a mixture

P tot = P H₂O + P Oxygen

P Oxygen = 748 mmHg - 30 mmHg

P Oxygen = 718 mmHg

6 0
3 years ago
What is the name given to substances like iron and sulfur, which contain only one type of atom?
Schach [20]

Answer:

iron sulfide(II)

Explanation:

Hope that helps!

3 0
3 years ago
Suppose you have crude reaction mixture containing napthalene, benzoic acid, and aniline dissolved in an organic solvent, and yo
Leto [7]

Answer:

d. Adding 5% HCl solution to the crude reaction mixture will protonate aniline increasing its solubility in the aqueous solution.

Explanation:

On this case, we have to check the <u>structures of each compound</u> (figure 1). For naphthalene we dont have <u>any functional groups</u> therefore, the addition of HCl or NaOH it will not affect naphthalene so <u>we can discard "B" and"C".</u>

When we add HCl solution we will have the production H^+ the presence of this <u>hydronium ion will protonate the acid</u>, so we can <u>discard a.</u>

<u />

Finally, for d when we add H^+ the <u>hydronium ion will react with aniline</u> (a base) and will produce an <u>ammonium ion</u>. This ammonium ion have a <u>positive charge</u>, therefore the <u>polarity will increase</u> and the molecule would be more soluble on water (figure 2).

I hope it helps!

7 0
3 years ago
Q3. Consider the reaction; Mg + O2 → MgO Calculate the mass of magnesium oxide possible if 2.5 g Mg reacts with 3.0 g O2? *
r-ruslan [8.4K]

<u>Answer</u>:

mass of  magnesium oxide is 4.2 grams.

<u>Explanation</u>:

                     Balanced equation:  2Mg + O2 → 2MgO.

Given that 2.5 g Mg reacts with 3.0 g O2

  • mass = moles * Mr
  • moles = mass/Mr
  • Mr = mass/moles

First find the moles of Mg:

moles = mass/Mr

moles = 2.5/ 24

moles = 0.104 moles

Using molar ratio, magnesium oxide will have same moles as Mg as they both have "2" molar ratio. So moles of Mg is 0.104 moles.

mass = moles * Mr

mass = 0.104 * 40

mass - 4.1667 g

mass = 4.2 g ___________this is the mass of MgO

7 0
2 years ago
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