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vodomira [7]
3 years ago
6

Click this link to view O*NET's Work Context section for Emergency Medical Technicians. Note that common tools

Chemistry
2 answers:
lawyer [7]3 years ago
7 0

Answer:

( B, C, E, F)

Explanation:

Person above is right!

But I hope this helps!!

agasfer [191]3 years ago
4 0

Answer:

2,3,5,6

Explanation:

i got it right

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What would be the mass of a 33.5dm3 sample of O2 at STP?
liraira [26]

Answer:

• One mole of oxygen is equivalent to 16 grams.

→ But at STP, 22.4 dm³ are occupied by 1 mole.

{ \tt{22.4 \:  {dm}^{3}   \: \dashrightarrow \: 16 \: grams}} \\  { \tt{33.5 \:  {dm}^{3}  \:  \dashrightarrow \: ( \frac{33.5 \times 16}{22.4} ) \: grams}} \\  \\  \dashrightarrow \: { \boxed{ \tt{23.94 \: g \approx \: 24 \: grams}}}

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2 years ago
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B: They are the results of many experiments over a long period of time.

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2 years ago
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In the compound AbO3, the ratio of aluminum to<br> oxygen is
jasenka [17]
The compound is Al2O3. The ratio of aluminum to oxygen is 2:3.
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3 years ago
Help! 15 Points!<br><br> Science!
Klio2033 [76]
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Iron (III) oxide is formed when Iron combines with oxygen in the air. How many grams of Fe₂O₃ are formed when 16.7 grams of reac
sladkih [1.3K]

Answer:

23.9g of Fe₂O₃ are produced

Explanation:

<em>Are formed when 16.7g of Fe reacts completely...</em>

<em />

Based on the reaction:

4Fe + O₃ → 2Fe₂O₃

<em>4 moles of Iron react per 1 mole of O₃ producing 2 moles of Fe₂O₃.</em>

<em />

To solve this question we need to convert the mass of iron to moles. The ratio of reaction is 2:1 -That is, 2 moles of Fe produce 1 mole of Fe₂O₃-. Thus, we can find the moles of Fe₂O₃ produced and its mass:

<em>Moles Fe -Molar mass: 55.845g/mol-:</em>

16.7g Fe * (1mol / 55.845g) = 0.299 moles of Fe

<em>Moles Fe₂O₃:</em>

0.299 moles Fe * (2 mol Fe₂O₃ / 4 mol Fe) = 0.150 moles Fe₂O₃

<em>Mass Fe₂O₃ -Molar mass 159.69g/mol-:</em>

0.150 moles Fe₂O₃ * (159.69g / mol) =

<h3>23.9g of Fe₂O₃ are produced</h3>

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7 0
3 years ago
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