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maw [93]
3 years ago
14

An atom of oxygen (O) has 8 protons, 8 neutrons, and 8 electrons. What is its mass number?

Chemistry
1 answer:
Tema [17]3 years ago
5 0

16 is the mass of an atom of Oxygen

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Concentrated hydrochloric acid is an aqueous solution that is 34.70 % HCl. The density of the solution is 1.19 g/mL. What mass o
mixas84 [53]

The mass of HCl that is contained in the solution is 147 g HCl

Why?

To find the mass of HCl we have to apply what is called a conversion factor. In a conversion factor we put the units we don't want at the bottom, and the ones we want at the top.

For this question, we want to go from liters of solution to mass of HCl, and the conversion factor is laid out as follows:

0.356Lsolution*\frac{1000mL}{1L}*\frac{1.19 g solution}{1 mL solution}*\frac{34.70 g HCl}{100 g solution}=147 g HCl

Have a nice day!

#LearnwithBrainly

3 0
3 years ago
If 100 yards = 1 football field, what is the length, in meters, of 4.9<br> football fields?
Veseljchak [2.6K]
* Answer: 448.056 meters *
——
1 yard = .9144 meters (according to Google)
100 yards= 91.44 meters
——
100*4.9= 490 yards
490 yards = 448.056 meters

* 4.9 Football fields= 448.056 meters *

I hope this helps! :)
4 0
2 years ago
Sonar stands for “sound navigation and ranging.” What assumption was proved wrong after the invention of sonar?
Vesna [10]

Answer:

B. The ocean floor is featureless.

Explanation:

4 0
2 years ago
If a dog has a mass of 21.5kg, what is his mass in the following units?
PolarNik [594]

Answer: 21.5kg in grams is 21,500 grams

21.5kg in mg is 215,000,00

Explanation:

5 0
3 years ago
Motivation that is physical and can be touched like a trophy or a medal is:
Talja [164]

Answer:

Tangible

Explanation:

Tangible alone means it is "perceptible by touch," meaning you physically observe the object with your sense of touch.

Having tangible motivation is like working for money or a trophy.

7 0
2 years ago
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