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Marrrta [24]
3 years ago
11

How to find molecular weight​

Chemistry
1 answer:
Nastasia [14]3 years ago
3 0

Answer:

Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen's is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.

Explanation:

hope this helped

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Use the atom builder interactive to identify each nucleus. Two protons represented as purple spheres and one neutron represented
aleksandr82 [10.1K]

Answer:

\frac{3}{2}He

\frac{6}{2} He

\frac{7}{4}Be

\frac{3}{1} H

\frac{6}{4}Be

\frac{7}{3} Li

Explanation:

In the first nucleus we are told that there are two protons and one neutron. Let us remember that the mass number = number of protons + number of neutrons.

This implies that, for the first specie the mass number is 3, for the second specie the mass number is 6 and the third specie has a mass number of 7 and so on. The mass number is indicated as a superscript.

The atomic number is the number of protons in the nucleus of the atom and helps us to identify the atom. It is always written as a subscript as shown.

5 0
3 years ago
If kc = 0.143 at 25°c for this reaction, predict the direction in which the system will shift if the initial concentrations of c
GenaCL600 [577]
The equation is as follows:
Cyclohexane (C6H12) ⇔ Methyl cyclopentane (C6H12)
The equilibrium constant Kc = 0.143 >>> (1)
Qc is the reaction quotient 
where; If Q = K >>>> No shift left or right >>> (2)
Q > K >>>> Reaction shifts left >>> (3)
Q < K >>>> Reaction shifts right >>> (4) 
And in our equation; Q = 0.3 / 0.4 = 0.75 >>> (5) 
From (1), (3) and (5), Q > Kc 
∴ the reaction shifts left

3 0
3 years ago
Why are all of the substances on the periodic table classified as elements?
natta225 [31]

Because just like compounds, the table of chemicals can be looked at as having all the different pieces of it.  So the different chemicals are the different "elements" to the periodic table.

6 0
3 years ago
Which is the electron configuration for boron?
blagie [28]

Answer:

electron configuration for boron is 1s22s22p1

hope this helps :)

Explanation:

8 0
3 years ago
What is an example of tipping point?
tensa zangetsu [6.8K]

Answer:Examples of tipping points are everywhere: a glass falling off a table upon tilting; a bacterial population hitting a level where it pushes your body into fever; the boiling point of water, or a cube of ice being thrown into warm water, where it rapidly melts.

Explanation:

6 0
3 years ago
Read 2 more answers
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