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lilavasa [31]
3 years ago
10

The mass number of an atom is obtained by totaling the number of _____ and _____.

Chemistry
2 answers:
son4ous [18]3 years ago
8 0
Mass number is the sum of protons and neutrons inside an atom.

Atomic mass = no. of protons + no. of neutrons
Alborosie3 years ago
4 0

the sum of protons and neutrons inside an atom is your answer


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How many liters of 0.2805 M C6H12O6(aq) contain 1.000 g of C6H12O6? 
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<span>2. If 5.15 g Fe(NO3)3 is dissolved in enough water to make exactly 150.0 mL of solution, what is the molar concentration of nitrate ion? </span>
<span>a) 0.00319 M b) 0.0343 M c) 0.142 M d) 0.313 M e) 0.426 M </span>

<span>3. What is the mass of sodium iodide in 50.0 mL of 2.63  10-2 M NaI(aq)? </span>
<span>a) 0.00132 g b) 0.00877 g c) 0.0788 g d) 0.197 g e) 78.8 g </span>

<span>4. If 25.00 mL of 4.50 M NaOH(aq) is diluted with water to a volume of 750.0 mL, what is the molarity of the diluted NaOH(aq)? </span>
<span>a) 0.0333 M b) 0.150 M c) 0.155 M d) 6.67 M e) 1.35 × 103 M </span>


<span>5. What volume of 0.15 M HCl(aq) must be diluted to make 2.0 L of 0.050 M HCl(aq)? </span>
<span>a) 0.015 L b) 0.10 L c) 0.30 L d) 0.67 L e) 6.0 L </span>

<span>6. What is the pH of 0.51 M HCl(aq)? </span>
<span>a) -0.29 b) 0.29 c) 0.31 d) 0.51 e) 0.67 </span>

<span>7. The pH of an aqueous NaOH solution is 13.17. What is the hydrogen ion concentration of this solution? </span>
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<span>9. An aqueous nitric acid solution has a pH of 1.15. What mass of HNO3 is present in 2.0 L of this solution? </span>
<span>a) 0.071 g b) 0.14 g c) 2.2 g d) 4.5 g e) 8.9 g </span>

<span>10. Iron reacts with hydrochloric acid. </span>
<span>Fe(s) + 2 HCl(aq) → FeCl2(aq) + H2(g) </span>
<span>What volume of 2.55 M HCl(aq) will react with 35.0 g Fe(s)? </span>
<span>a) 0.246 L b) 0.492 L c) 1.60 L d) 3.20 L e) 27.5 L </span>


<span>11. What volume of 0.200 M Na2SO4(aq) will completely react with 50.0 mL of 0.135 M Ba(NO3)2(aq)? </span>
<span>Na2SO4(aq) + Ba(NO3)2(aq) → BaSO4(s) + 2 NaNO3(aq) </span>
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<span>12. A mass of 0.4113 g of an unknown acid, HA, is titrated with NaOH. If the acid reacts with 28.10 mL of 0.1055 M NaOH(aq), what is the molar mass of the acid? </span>
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<span>b) 9.128 g/mol </span>
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<span>e) 820.7 g/mol </span>

<span>13. A 25.00 mL sample of KOH is titrated with 21.83 mL of 0.2120 M HCl(aq). What is the concentration of the KOH solution? </span>
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4 0
3 years ago
What would be the vital capacity be for a man that has a tidal volume of 500mL, a residual volume of 1100 mL, an expiratory rese
dezoksy [38]

The vital capacity will be 4600ml.

<h3>What is vital capacity?</h3>

The highest amount of air a person can inhale following their maximal exhalation is known as their vital capacity. It is equivalent to the total of the inspiratory, tidal, and expiratory reserve volumes. It roughly corresponds to Forced Vital Capacity. A wet or conventional spirometer can assess a person's vital capacity.

Normal people have a 3 to 5-liter vital capacity.

It enables simultaneous inhalation of the greatest possible volume of clean air and exhalation of the greatest possible volume of stale air. So, by increasing gaseous exchange between the body's various tissues, it improves the amount of energy available for bodily function.

VC = TV₊IRV₊ERV

where,

VC = Vital capacity

TV = Tidal volume

IRV = inspiratory reserve volume

ERV = expiratory reserve volume

VC = 500 ₊ 3000 ₊ 1100

VC = 4600ml

Therefore, the vital capacity will be 4600ml.

To know more about  vital capacity refer to: brainly.com/question/14877276

#SPJ4

3 0
2 years ago
The position of the equilibrium for a system where k = 4.6 × 10-15 can be described as being favored to ________; the concentrat
Stolb23 [73]
Hello!

<span>The position of the equilibrium for a system where k = 4.6 × 10-15 can be described as being favored to the left; the concentration of products is relatively small.

For a reaction where A produces B, the chemical equation is the following:

A </span>⇄ B

The equilibrium constant expression is the following:

k= \frac{[B]}{[A]}

From this equation, we can see that when the constant is small, as in the case of the exercise, the concentration of products is also small, and the equilibrium is favored to the left. 

Have a nice day!
7 0
3 years ago
What will happen if there is an insufficient supply of oxygen during the combustion of a hydrocarbon?
Kamila [148]
As long as there is some oxygen, the reaction will occur. If there is an insufficient amount of oxygen, then the oxygen will be the limiting reacting and there will be excess of the other reactants. 
8 0
4 years ago
Use the balanced equation below to answer the question that follows
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It’s c hdjdkdmnfvdheidk
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