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Vadim26 [7]
3 years ago
13

Which polymer is a biopolymer?

Chemistry
2 answers:
babymother [125]3 years ago
8 0

Answer:

c

Explanation:

kodGreya [7K]3 years ago
6 0
Polylactic acid is the correct answer
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Given 7.45 g of butanoic acid and excess ethanol, how many grams of ethyl butyrate would be synthesized, assuming a complete 100
KengaRu [80]

The equation for the reaction is:

C₄H₈O₂ + C₂H₅OH = C₆H₁₂O₂ + H₂O

Now you see that the number of the moles of butanoic acid and etyl butyrate is equal in

the reaction. That means;

number of moles of C₄H₈O₂ = number of moles of C₆H₁₂O₂

mass of C₄H₈O₂/ Molar mass of C₄H₈O₂ = mass of C₆H₁₂O₂/ molar mass of C₆H₁₂O₂

mass of C₆H₁₂O₂ = molar mass of C₆H₁₂O₂ x mass of C₄H₈O₂/ Molar mass of C₄H₈O₂

Now, assuming <span>100% yield, the mass of ethyl butyrate produced is: </span>

<span>= 7.45/88.11 x 116.16</span>

<span>=9.82g</span>

<span>Thus, the theoretical yield of ethyl butyrate is 9.82g.</span>

3 0
3 years ago
Use the pull-down boxes to specify states such as (aq) or (s). If a box is not needed leave it blank. If no reaction occurs leav
Andrei [34K]

Answer:

ZnS(s) ⇄ S²⁻(aq) + Zn²⁺(aq)

Explanation:

First, we will write the molecular equation, since it is easier to balance.

2 HBr(aq) + ZnS(s) ⇄ H₂S(aq) + ZnBr₂(aq)

In the full ionic equation we include all ions and molecular species.

2 H⁺(aq) + 2 Br⁻(aq) + ZnS(s) ⇄ 2 H⁺(aq) + S²⁻(aq) + Zn²⁺(aq) + 2 Br⁻(aq)

In the net ionic equation we include only the ions that participate in the reaction and the molecular species.

ZnS(s) ⇄ S²⁻(aq) + Zn²⁺(aq)

6 0
3 years ago
What is the actual amount of phosphorous in a fertilizer with a npk ratio of 15-15-20?
OLga [1]
<span>NPK ratio system is a conventional shorthand for the ratio of the nitrogen N), phosphorus (P) and potassium (K) in a fertilizer. It actually shows amount of P</span>₂O₅.
If we use 100 kg of P₂O₅:
m(P₂O₅) = 0,15 · 100 kg.
m(P₂O₅) = 15 kg.
m(P₂O₅) : M(P₂O₅) = m(P) : 2M(P).
15 kg : 142 = m(P) : 62.
m(P) = 6,55 kg.
ω(P) = 6,55 kg ÷ 100 kg · 100% = 6,55%.
3 0
3 years ago
Read 2 more answers
Peter ate junk food at breakfast and worried about the examination, which combined to give him an annoying case of acid indigest
vova2212 [387]

Answer:

Consumption of Antacid

Explanation:

At breakfast when Peter ate junk food , excess acid could have got released due to which he had got acidity in his stomach. By consumption of Antacid can reduce the effect of acidity because antacid is a mild base. When a mild base reacts with acid it neutralises the effect of acid & hence gives a relief from acidity...

7 0
3 years ago
A a black metal measures 2 cm x 3 cm x 2.5 cm if it's much is 67.5 grams calculate its density​
liraira [26]

Answer:

d=4.5  g/cm³

Explanation:

v=l x w x h

v=2 x 3 x 2.5

v=15 cm³

d=m/v

d=67.5/15

d=4.5  g/cm³

3 0
3 years ago
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