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nlexa [21]
2 years ago
14

I/3 of 12 = 2/3 ofplease help at 11 o'clock am it needs to be done ​

Chemistry
1 answer:
Nostrana [21]2 years ago
4 0

Answer:

6

Explanation:

This question is seeking for an equivalent of one expression. The first expression says 1/3 of 12, which means 1/3 × 12 = 4. To find 2/3 of a number that will give us 4, we say

Since; 1/3 of 12 is 4

Then, 4 = 2/3 of x, where x is the number, which when multiplied by two-third (2/3) will result to 4.

4 = 2/3 × x

4 = 2x/3

Cross multiply

2x = 3 × 4

2x = 12

x = 12/2

x = 6.

This means that; 1/3 of 12 = 2/3 of 6

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Describe a method to calculate the average atomic mass of the sample in the previous question using only the atomic masses of li
alexira [117]

Answer:

Explanation:

To calculate their average atomic masses which is otherwise known as the relative atomic mass, we simply multiply the given abundances of the atoms and the given atomic masses.

The abundace is the proportion or percentage or fraction by which each of the isotopes of an element occurs in nature.

This can be expressed below:

        RAM = Σmₙαₙ

where mₙ is the mass of isotope n

           αₙ is the abundance of isotope n

for this problem:

RAM of Li = m₆α₆ + m₇α₇

       m₆ is mass of isotope Li-6

        α₆ is the abundance of isotope Li-6

       m₇ is mass of isotope Li-7

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3 0
3 years ago
Why would an aqueous solution of a strong electrolyte conduct electricity better than an aqueous solution of a weak electrolyte?
Virty [35]
The answer is B because the more ions the more electrolytes it has
4 0
3 years ago
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Suppose you had used carbon tetrachloride, a liquid of density 2.20 g/mL, to determine the actual volume measured by your pipet.
VARVARA [1.3K]

Answer:

Carbon tetrachloride would be 2.2 fold heavier than water

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4 0
2 years ago
what pressure in N/m2 would be exerted if a 65 kg person were sitting on a stool with a seat diameter of 12 inches?
yaroslaw [1]

d = diameter of the seat = 12 inch

we know that , 1 inch = 0.0254 m

hence

d = diameter of the seat = 12 inch = 12 (0.0254) m = 0.305 m

r = radius of seat = diameter/2 = d/2 = 0.305/2 = 0.1525 m

A = area of seat = πr²

m = mass of the person = 65 kg

g = acceleration due to gravity = 9.8 m/s²

F = force due to weight of person on the seat = mg

pressure on the seat is given as

P = F/A

P = mg/A

P = mg/(πr² )

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P = (65 x 9.8)/((3.14) (0.1525)²)

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7 0
3 years ago
The equation that represents this reaction is Pb(NO3)2(aq) + 2 KI(aq) arrow PbI2(s) + 2 KNO3(aq). In what ways does this equatio
o-na [289]

Answer: The number of atoms remain constant and thus the  mass also remains conserved.

Explanation:

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Thus the number of atoms remain constant and thus the  mass also remains conserved.

3 0
3 years ago
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