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Dominik [7]
3 years ago
13

What is a chemical property of the fruit shown above? A. The fruit can decompose. B. The fruit has a mass of 250 grams. C. The f

ruit is orange. D. The fruit is a solid.
Chemistry
2 answers:
saw5 [17]3 years ago
6 0

i think the best answer for this is B)


Karolina [17]3 years ago
6 0

Answer:

the answer  is B

Explanation:

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Many computer chips are manufactured from silicon, which occurs in nature as SiO2 . When SiO2 is heated to melting, it reacts wi
Ierofanga [76]

Answer:

a. Theoretical yield of Si = <u>72.58 kg</u>

b. Percent Yield =<u> 91.2 %</u>

Explanation:

The chemical reaction involved is:  SiO₂ (l) + 2C (s) → Si (l) + 2CO (g)

The stoichiometric ratio = 1 mol SiO₂ ÷ 2 mol C = 0.5 mol SiO₂ ÷ 1 mol C

Given: mass of SiO₂: w₁ = 155.3kg = 155.3 × 10³g,  mass of C: w₂ = 79.3kg = 79.3 × 10³g,  mass of Si: w₃ = 66.2kg = 66.2 × 10³g                  (∵ 1 kg =1000g)

Molar mass of SiO₂: m₁ = 60.08 g/mol, atomic mass of C: m₂ = 12.01 g/mol, atomic mass of Si: m₃ = 28.08 g/mol

Number of moles of SiO₂ taken: n₁ = w₁ ÷ m₁ = 155300 g ÷ 60.08 g/mol = 2584.88 mol

Number of moles of C taken: n₂ = w₂ ÷ m₂ = 79300 g ÷ 12.01 g/mol = 6602.83 mol

Actual ratio = n₁ ÷ n₂ = 2584.88 mol SiO₂ ÷ 6602.83 mol C = 0.39 mol SiO₂ ÷ 1 mol C

Since the stoichiometric ratio > actual ratio

<u>Therefore, SiO₂ is the limiting reagent.</u>

<u />

Now, the mass of SiO₂ in 1 mol = number of moles × molar mass = 1 mol × 60.08 g/mol = 60.08 g

the mass of Si in 1 mol = number of moles × molar mass = 1 mol × 28.08 g/mol = 28.08 g

 

So 28.08 g of Si is produced from 60.08 g SiO₂

Therefore, the amount of Si produced from 155300 g SiO₂ = 155300 g × 28.08 g ÷ 60.08 g = 72583.62 g = 72.58 kg

<u>Therefore, the </u><u>theoretical yield</u><u> of Si = 72.58 kg</u>

<u>Actual yield</u><u> of Si = 66.2 kg</u>

Therefore,<u> </u><u>Percent Yield</u><u>  </u>= Actual yield ÷ Theoretical yield × 100 = 66.2 kg ÷ 72.58 kg × 100 =<u> 91.2 %</u>

3 0
3 years ago
Whose idea was it to classify living things?
Elanso [62]

Answer:

Aristotle's idea was to classify living beings.

I think so

5 0
4 years ago
Read 2 more answers
What is the molecular geometry about nitrogen in ch3nh2?
Molodets [167]
In Methyl Amine the Nitrogen atom is attached to two Hydrogen Atoms and one Methyl (CH₃-) group. From Lewis structure it is shown that the Nitrogen atom also contains a lone pair of electron.
So,
According to Valence Shell Electron Pair Repulsion (VSEPR) Theory, those central atoms which have four electron pairs and all of them are bonding electron pairs gives Tetrahedral Geometry.

Methylamine also contains four electron pairs, but out of four only three are bonding pair electrons and one lone pair electron. Now, due to presence of lone pair of electron (which has greater repulsion effect than bonding electron pair) the bond angle between H-N-H will decrease from 109° to 107° and results in the formation of <span>Trigonal Pyramidal geometry as shown below,</span>

8 0
3 years ago
A 49.3 sample of CaCO3 was treated with aqueous H2SO4, producing calcium sulfate, 3.65 g of water and CO2(g). What was the % yie
yaroslaw [1]

Answer:

41.1%

Explanation:

First write the balanced reaction:

CaCO₃ + H₂SO₄ → CaSO₄ + H₂O + CO₂

Now calculate the theoretical yield:

49.3 g CaCO₃ × (1 mol CaCO₃ / 100 g CaCO₃) = 0.493 mol CaCO₃

0.493 mol CaCO₃ × (1 mol H₂O / 1 mol CaCO₃) = 0.493 mol H₂O

0.493 mol H₂O × (18 g H₂O / mol H₂O) = 8.87 g H₂O

Now calculate the % yield:

3.65 g H₂O / 8.87 g H₂O × 100% = 41.1%

5 0
3 years ago
Read 2 more answers
Which graph represents an object that is decreasing in speed
Arte-miy333 [17]

Answer:

The first one

Explanation:

8 0
3 years ago
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