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solmaris [256]
3 years ago
12

If a neutral atom of boron (B) contains 5 protons, 5 electrons and 6 neutrons, what is the mass number of this atom? (2 points)

Chemistry
2 answers:
viktelen [127]3 years ago
7 0
The atomic mass it 11. 5 Proton and 6 Neutrons is 11 mass. Protons and Neutrons both weigh 1U.
Shkiper50 [21]3 years ago
6 0
I believe the answer is 11, its been awhile since i was in science
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Calculate each of the following quantities.<br> (a) mass in kilograms of 3.7 x 1020 molecules of NO2
HACTEHA [7]

Answer:

The answer to your question is:  0.028 kg of NO2

Explanation:

Data

3.7 x 10²⁰ molecules of NO2 in kg

MW of NO2 = 14 + (16 x 2) = 14 + 32 = 46 kg

                   1 mol of NO2 ---------------------  6.023 x 10 ²³ molecules

                   x                     --------------------- 3.7 x 10²⁰ molecules

                   x = 3.7 x 10²⁰ x 1 / 6.023 x 10 ²³

                   x = 0.00061 mol

         

                 1 mol of NO2 ---------------------  46 kg of NO2

                 0.00061 mol     ------------------    x

                 x = 0.00061 x 46/1

                x = 0.028 kg of NO2

7 0
3 years ago
Plzz help i will give brillants and stars and thx.
dalvyx [7]
Hdhdjejdhebdehxhshwhdb d nonsense
3 0
3 years ago
Read 2 more answers
TRUE/FALSE. the profit-maximizing rule leaves room for cases where it is both possible and reasonable for a firm to operate at a
SCORPION-xisa [38]

The statement was false as it mentioned, the profit-maximizing rule leaves room for cases where it is both possible and reasonable for a firm to operate at a loss over the long run

What is profit-maximizing rule ?

According to the Profit Maximization Rule, if a corporation want to maximise its profits, it must select the level of output where Marginal Cost (MC) equals Marginal Revenue (MR) and the Marginal Cost curve is increasing. To put it another way, it must generate at a level where MC = MR.

The profit maximization rule formula is as follows:

MC = MR

The marginal cost is the cost increase caused by manufacturing one extra unit of an item.

The difference in total revenue as a result of altering the rate of sales by one unit is referred to as marginal revenue. The slope of Total Revenue is also known as Marginal Revenue.

Total Revenue - Total Costs = Profit

Profit maximisation happens when there is a considerable gap or disparity between total revenue and total cost.

so the given statement the profit-maximizing rule leaves room for cases where it is both possible and reasonable for a firm to operate at a loss over the long run. was a false statement.

To learn more about profit-maximizing rule  follow the given link: brainly.com/question/7586794

#SPJ4

5 0
1 year ago
Which scientist arranged the elements in order of increasing atomic number, rather than increasing atomic mass? Antoine Lavoisie
Natalka [10]
The answer is Henry Moseley
6 0
3 years ago
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B. Describe hydrogen bonding. (1 point)
marishachu [46]
Hydrogen bonding is an attractive force between a hydrogen atom attached to a electronegative element
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