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galben [10]
2 years ago
7

The atomic mass of oxygen is 15.999 amu whatbdoes the value equal

Chemistry
1 answer:
sweet-ann [11.9K]2 years ago
7 0

Answer:

The sum of the protons and neutrons.

Explanation:

protons + neutrons = atomic mass

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How many ml of 0.5M of HNO3 would be needed to react with 85ml of 0.75M of KOH
olganol [36]

Answer: 127.5ml

Explanation:

To calculate the volume of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is HNO_3

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is KOH.

We are given:

n_1=1\\M_1=0.5M\\V_1=?mL\\n_2=1\\M_2=0.75M\\V_2=85mL

Putting values in above equation, we get:

1\times 0.5\times V_1=1\times 0.75\times 85\\\\V_1=127.5mL

Thus 127.5 ml of 0.5M of HNO3 would be needed to react with 85ml of 0.75M of KOH

6 0
2 years ago
If you start with 42 g of Fe-53, how much is left after 8.51 minutes? I​
Paladinen [302]

Answer:

2:38

Explanation:

4 0
3 years ago
Read 2 more answers
Using the equation
o-na [289]

Answer:

13.36

first you have to convert the grams of nitrogen into moles when you got the moles of nitrogen. Then 2 moles of ammonia react with 1 mole nitrogen you have doubled the nitrogen mole and then convert the moles into the grams of ammonia.

use this formula for that:

moles = gram/molar mass

5 0
3 years ago
Describe how platelets function
VashaNatasha [74]

Answer:

Platelets are tiny blood cells that help your body form clots to stop bleeding.

Explanation:

If one of your blood vessels gets damaged, it sends out signals to the platelets. The platelets then rush to the site of damage and form a plug (clot) to fix the damage.

7 0
3 years ago
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if some of the Mg ribbon had not reacted because it stuck to the side of the tube and did not contact the acid, how would this h
larisa [96]

Answer:

For chemical reactions involving gases, gas volume measurements provide a convenient means of  determining stoichiometric relationships.

Explanation:

Hope this helps! ∩ω∩

6 0
3 years ago
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