How can i find the number of neutrons in an element

Chemistry

2 answers:

lawyer [7]4 years ago

7 0

Answer:

The mass number is the sum of protons and neutrons. This means to find the number of neutrons you subtract the number of protons from the mass number. On the periodic table, the atomic number is the number of protons, and the atomic mass is the mass number.

Explanation:

Ostrovityanka [42]4 years ago

3 0

Answer:

Use the equation N=M-n

Explanation:

N=neuron

M=atomic mass

n=atomic munber

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Wine goes bad soon after opening because the ethanol ch3ch2oh in it reacts with oxygen gas o2 from the air to form water h2o and

lilavasa [31]

The balanced chemical equation of the reaction described above is,

C2H6O + O2 --> H2O + C2H4O2

If we have 3.84 g of oxygen, we divide by its molar mass.

n = (3.54 g Oxygen gas) x (1 mole O2/ 32 g O2)
n = 0.11 moles O2

Using ratio and proportion,

number of moles of ethanol = (0.11 moles O2) x (1 mole C2H6)
= 0.11 moles C2H6

Then, we multiply the calculated value to its molar mass, 46 grams /mol.
mass of ethanol = (0.11 mol) x (46 grams / mol)
= <em>5.06 grams</em>

8 0

3 years ago

Please guys help me with this

Finger [1]

Answer:

It's B.

Explanation:

5 0

3 years ago

Read 2 more answers

Part 1: Draw the major organic product for the proton transfer reaction between sodium hydride and ethanol; be sure to include l

valina [46]

Answer:

Major product ethoxide ion

Explanation:

Sodium hydride acts as a strong base towards ethanol.
Hydride ion abstracts one proton from -OH group in ethanol to produce sodium ethoxide and hydrogen gas.
It is an example of acid-base reaction where sodium hydride acts as a base and ethanol acts as an acid
Structure of major organic product i.e. ethoxide ion has been shown below.