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3 years ago

[40 points] How do I find the average atomic masses of these?

Chemistry

1 answer:

RUDIKE [14]3 years ago

4 0

Answer:

14.02 amu

Explanation:

The following data were obtained from the question:

Isotope A (N–13):

Mass of A = 13 amu

Abundance (A%) = 28.97%

Isotope B (N–14):

Mass of B = 14 amu

Abundance (B%) = 41.04%

Isotope C (N–15):

Mass of C = 15 amu

Abundance (C%) = 29.97%

Average atomic mass of nitrogen =?

The average atomic mass of nitrogen can be obtained as illustrated below:

Average = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]

= [(13 × 28.97)/100] + [(14 × 41.04)/100] + [(15 × 29.97)/100]

= 3.77 + 5.75 + 4.50

= 14.02 amu

Thus, the average atomic mass of nitrogen is 14.02 amu

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Equation balancing

meriva

Answer:

For a: The balanced equation is $2S(s)+3O_2(g)\rightarrow 2SO_3(g)$

For c: The balanced equation is $2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+2H_2O(l)$

Explanation:

A balanced chemical equation is one where all the individual atoms are equal on both sides of the reaction. It follows the law of conservation of mass.

For (a):

The given unbalanced equation follows:

$S(s)+O_2(g)\rightarrow SO_3(g)$

To balance the equation, we must balance the atoms by adding 2 infront of both $S(s)$ and $SO_3$ and 3 in front of $O_2$

For the balanced chemical equation:

$2S(s)+3O_2(g)\rightarrow 2SO_3(g)$

For (b):

The given balanced equation follows:

$2Al(s)+3Cl_2(g)\rightarrow 2AlCl_3(s)$

The given equation is already balanced.

For (c):

The given unbalanced equation follows:

$2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+H_2O(l)$

To balance the equation, we must balance the atoms by adding 2 infront of $H_2O(l)$

For the balanced chemical equation:

$2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+2H_2O(l)$

For (d):

The given balanced equation follows:

$C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)$

The given equation is already balanced.

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3 years ago

You are given a cup of milk and a spoon of sugar. What type of mixture will be formed? justify your answer.

IrinaK [193]

Milk that’s really sweet? or clumpy milk?

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3 years ago

How many moles of glucose can be produced

Arturiano [62]

Answer:

moles of glucose

2.3166 moles of glucose

Explanation:

The balance reaction for the formation of glucose is :

$6CO_{2}+6H_{2}O\rightarrow C_{6}H_{12}O_{6}+6O_{2}$

here , CO2 = carbon dioxide

H2O = water

C6H12O6 = glucose

O2 = Oxygen

According to this equation :

6 mole of CO2 = 6 mole of H2O = 1 mole of C6H12O6 = 6 mole of O2

We are asked to calculate the mole of Glucose from carbon dioxide.

So,

6 mole of CO2 produce = 1 mole of C6H12O6

1 mole of CO2 will produce =

$\frac{1}{6}$ moles of glucose

13.9 moles of CO2 will produce :

$\frac{1}{6}\times 13.9$

=2.3166 moles of glucose

Note : first , Always calculate for one mole (By dividing)

. After this , multiply the answer with the moles given.

Always write the substance whose amount is asked(glucose) to the right hand side

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4 years ago

What is the pH of a 6.4*10-10 m oh- solution?

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PH: 4.80617997
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TRUE OR FALSE? Solvents are the component in solutions with highest percent composition

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Answer:

True

Explanation:

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