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nalin [4]
3 years ago
14

6. Which of the following labels for the picture below is correct? a) Solute + solvent = solution b) Solvent + solute = saturati

on c) Solvent + solute = soluble d) Solvent + solute = solution ​
Chemistry
1 answer:
SVETLANKA909090 [29]3 years ago
4 0

Answer:

answer is a since solute dissolve a solvent to give a solution

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How many grams of O₂ are required to react completely with 14.6 g of Na to form sodium oxide, Na₂O?
Bad White [126]

The balanced chemical reaction is :

O_2 + 4Na \ -> \ 2Na_2O

Number of moles of Na, n = \dfrac{14.6}{23} = 0.635 \  mol .

Now, from balance chemical reaction we can see that 1 mole of oxygen reacts with 4 moles of sodium.

So, number of moles of oxygen are :

n = \dfrac{0.635}{4}\  mole

So, amount of oxygen required is :

m = \dfrac{0.635 \times 32}{4}\  gm\\\\m = 5.08 \ gm

Therefore, 5.08 gram of oxygen will react with 14.6 gram of sodium.

7 0
3 years ago
Which of the following statements correctly explains why we experience seasons?
Basile [38]
Answer: I believe C is your best answer

Explanation: The earth revolves around the sun in an elongated circle. Every year is one full “circle.” Due to the earth also having a tilt on its axis, one “side” of the earth is usually closer to the sun. So In the first quarter of the earth’s travel around the sun, it’ll be winter, then the next quarter, spring, followed by Summer halfway through and then Autumn/fall. Such can be compared to how the seasons each usually fill in about a quarter of your calendar. That was explained a bit confusing but I hope I helped, good luck!
8 0
2 years ago
How many moles of CaO are needed to react with excess water to produce 370g of calcium hydroxide?
never [62]

Answer:

5 moles

Explanation:

CaO+H20--> Ca(OH)2

mass 280 90 370g

RFM 56 18 74

moles 5 5 5

4 0
3 years ago
What is the definition of toxicity?​
larisa [96]

Answer:

The level of toxins in solutions

4 0
3 years ago
Read 2 more answers
What is the volume (in dm3 of 1 mole of oxygen at 5 MPa and 200 K?
vodka [1.7K]

<u>Answer:</u> The volume of oxygen gas is 0.332dm^3

<u>Explanation:</u>

To calculate the volume of the gas, we use the equation given by ideal gas equation:

PV=nRT

where,

P = pressure of the gas = 5 MPa = 5000 kPa   (Conversion factor: 1 MPa = 1000 kPa)

V = Volume of gas = 3.34 L

n = number of moles of oxygen gas = 1 mole

R = Gas constant = 8.31dm^3\text{ kPa }mol^{-1}K^{-1}

T = Temperature of the gas = 200 K

Putting values in above equation, we get:

5000kPa\times V=1mol\times 8.31dm^3\text{ kPa }mol^{-1}K^{-1}\times 200K\\\\V=0.332dm^3

Hence, the volume of oxygen gas is 0.332dm^3

7 0
3 years ago
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