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4vir4ik [10]
2 years ago
7

An element with 11 neutrons, 11 protons, and 11 electrons would have a mass number o?

Chemistry
1 answer:
vova2212 [387]2 years ago
4 0

The mass number of element  is 22.

The mass number is the sum of number of electrons/proton and number of neutron .

Mass number = number of proton/electron + number of neutrons

If an element with 11 neutrons, 11 protons, and 11 electrons then mass number is calculated as,

Mass number = number of proton/electron + number of neutrons

Mass number = 11 + 11 = 22

learn about element

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a sample of ammonia liberates 5.66 kj of heat as it solidifies at its melting point . what is the mass of the sample?
Reil [10]
The correct answer for the question that is being presented above is this one: "<span>16.728 g."</span>

Given that 
ΔHsolid = -5.66 kJ/mol.
This means that 5.66 kJ of heat is released when 1 mole of NH3 solidifies 

When 5.57 kJ of heat is released
amount of NH3 solidifies = 5.57/5.66 = 0.984 moles 

<span>molar mass of NH3 = 17 g/mole </span>
<span>1 mole of NH3 = 17 g </span>
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7 0
3 years ago
I got the total but can’t get these ???
LiRa [457]

Answer:

Volume of heptane in cylinder = 51.2mL

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Explanation:

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Please prompt me if I'm wrong in my workings. Hope this helped.

5 0
3 years ago
The nitrogenous base adenine is found in all members of which group?
svetoff [14.1K]

Answer:

<h2>ATP, RNA, NAD and DNA.</h2>

Explanation:

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Adenine is a nitrogenous base which is found in ATP, RNA. NAD, FAD and DNA. adenine pairs with thymine in DNA synthesis.

3 0
3 years ago
Please answer this for points
kolbaska11 [484]
I believe the answer is Synthesis
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If you have 3 dozen pennies how many ml of water would they displace
wel

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3 0
3 years ago
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