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bazaltina [42]
3 years ago
15

Help with completing steps (photo attachted)

Chemistry
1 answer:
Leokris [45]3 years ago
5 0
Step 1 is correct.

Step 2.

There are 2 Iron (Fe) atoms in the formula so we will multiply 2 with the relative mass of Fe .

2\cdot 56=112 

Relative mass of Iron atoms in the formula is 112 amu (atomic mass unit)

Step 3.

To find the percentage,

we will divide mass of iron to total mass and equal that to x divided to 100.

\frac { 112 }{ 160 } =\frac { x }{ 100 } \\ \\ 0.7=\frac { x }{ 100 } \\ \\ 0.7=\frac { 7 }{ 10 } =\frac { 70 }{ 100 } \\ \\ \frac { 70 }{ 100 } =\frac { x }{ 100 } \\ \\ x=70

Total mass of iron is 70% of the total mass of the formula.

 
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If high temperatures are most effective at killing microbes, what statement correctly explains why some food products are treate
ZanzabumX [31]

Answer: A

Explanation:

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6 0
2 years ago
2HgO—>2Hg+O2. I start with 46.8 g HgO. What is my theoretical yield of O2?
jok3333 [9.3K]

Answer:

Theoretical yield = 3.52 g

Percent yield =65.34%

Explanation:

Given data:

Mass of HgO = 46.8 g

Theoretical yield of O₂ = ?

Percent yield of O₂ = ?

Actual yield of O₂ =  2.30 g

Solution:

Chemical equation:

2HgO  →   2Hg + O₂

Number of moles of HgO = mass/ molar mass

Number of moles of HgO = 46.8 g / 216.6 g/mol

Number of moles of HgO = 0.22 mol

Now we will compare the moles of HgO with oxygen.

                         HgO             :             O₂

                             2               :               1

                            0.22           :          1/2×0.22 = 0.11 mol

Theoretical yield:

Mass of oxygen = number of moles × molar mass

Mass of oxygen =  0.11 mol × 32 g/mol

Mass of oxygen = 3.52 g

Percent yield :

Percent yield = actual yield / theoretical yield × 100

Percent yield = 2.30 g/ 3.52 g × 100

Percent yield =65.34%

5 0
3 years ago
Which best describes the three general groups of elements?
Alex73 [517]

Answer:

D

Explanation:

3 0
3 years ago
Click on the graph to show the correct relationship between altitude and boiling point
spin [16.1K]

Explanation:

This graph shows that an increase in altitude causes a relative decrease in  boiling point temperatures. The two variables, it can be said, are inversely proportional.

This is because, with an increase in altitude, there is a proportionate decrease in air pressure. This means the vapor pressure of the fluid becomes strong enough, at a relatively lower temperature, to overcome the air pressure and for the liquid to boil.

This is why water can even boil without inputting heat into it but rather by just reducing the ambient air pressure.

8 0
4 years ago
Read 2 more answers
How many atoms are in 6.2 moles of aluminum?
Kazeer [188]
<span>6.2×6.022×<span>1023</span>=3.733×<span>1024</span></span><span> atoms.</span>
7 0
3 years ago
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