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tekilochka [14]
3 years ago
5

How do scientist know climate change is happening is it

Chemistry
2 answers:
gogolik [260]3 years ago
8 0

Answer: The answer is A. Thay measure the amount of greenhous gases in the atmosphere and the temperature over many years

Explanation:

babunello [35]3 years ago
7 0

Answer: The answer would be A;They measure the amount of greenhouse gases in the atmosphere, and the temperature over many years.

Explanation: If scientists only went off of clouds, they'd only be able to tell if it is about to rain. If they only observed the oceans, they'd only be able to tell when a tornado or tsunami was about to occur.

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How many electron dots should As have?
Effectus [21]

Answer:

5

Explanation:

8 0
3 years ago
A formula unit made with Na and unknown nonmetal "Z" has the formula, NaZ. Which element does "Z" represent?
vovangra [49]
The answer is chloride ig ‍♀️
6 0
2 years ago
A brick has a mass of and the Earth has a mass of . Use this information to answer the questions below. Be sure your answers hav
weeeeeb [17]

The given question is incomplete. The complete question is:

A brick has a mass of 4.0 kg and the earth has a mass of 6.0\times 10^{27}g Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of bricks? Round your answer to 2 significant digits. How many moles of bricks have a mass equal to the mass of the Earth? Round your answer to 2 significant digits.

Answer: The mass of 1 mole of bricks is 2.4\times 10^{27}g

2.5 moles of bricks have a mass equal to the mass of the Earth

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number 6.023\times 10^{23} of particles.

Mass of 1 brick = 4.0 kg = 4000 g     (1kg=1000g)

Thus mass of 1 mole of brick or 6.023\times 10^{23} bricks will be = \frac{4000g}{1}\times 6.023\times 10^{23}=2.4\times 10^{27}g

The mass of 1 mole of bricks is 2.4\times 10^{27}g

Now 2.4\times 10^{27}g will correspond to = 1 mole of bricks

6.0\times 10^{27}g will correspond to =\frac{1}{2.4\times 10^{27}}\times 6.0\times 10^{27}=2.5moles

2.5 moles of bricks have a mass equal to the mass of the Earth

5 0
2 years ago
What change would increase the amount of gas able to be dissolved in a given amount of liquid water?
butalik [34]
It would be the change in pressure that would <span>increase the amount of gas able to be dissolved in a given amount of liquid water. Increasing the pressure of a system would allow more gas to be dissolved into a liquid. Hope this answers the question. Have a nice day.</span>
3 0
2 years ago
Read 2 more answers
If 20.0 mL of glacial acetic acid (pure HC2H3O2HC2H3O2) is diluted to 1.70 L with water, what is the pH of the resulting solutio
Andreas93 [3]

Answer:

The answer to your question is pH = 0.686

Explanation:

Data

Acetic acid = 20 ml

Final volume = 1.7 L

pH = ?

density = 1.05 g/ml

Process

1.- Calculate the mass of acetic acid

density = mass / volume

mass = density x volume

mass = 1.05 x 20

mass = 21 g

2.- Calculate the moles of acetic acid (CH₃COOH)

Molar mass = (12 x 2) + (16 x 2) + (4 x 1)

                   = 24 + 32 + 4

                   = 60 g

                 60 g of acetic acid ---------------- 1 mol

                 21 g of acetic acid ----------------- x

                 x = (21 x 1) / 60

                 x = 0.35 moles

3.- Calculate the concentration

Molarity = 0.35 moles / 1.70 L

              = 0.206

4.- Calculate the pH

pH = -log[0.206]

pH = 0.686

6 0
3 years ago
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