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boyakko [2]
3 years ago
13

A construction worker uses a pulley and a rope to

Chemistry
1 answer:
Umnica [9.8K]3 years ago
3 0

Answer: Work is 1.7 kJ,  Power is 280 W

Explanation: Work  W = mgh, power P= W/t

W = 85 kg·9.81m/s²·2 m = 1667.7 J

P = 1667.7 J / 6 s = 277.95 W

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What is the theoretical yield of SO3 produced by 8.96 g of S?
Virty [35]

Answer: Theoretical yield of SO_3 produced by 8.96 g of S is 33.6 g

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}

\text{Moles of} S=\frac{8.96g}{32g/mol}=0.28moles

The balanced chemical equation is:  

2S+3O_2\rightarrow 2SO_3  

According to stoichiometry :

2 moles of S produce =  3 moles of SO_3

Thus 0.28 moles of S will produce=\frac{3}{2}\times 0.28=0.42moles  of SO_3  

Mass of SO_3=moles\times {\text {Molar mass}}=0.42moles\times 80g/mol=33.6g

Thus theoretical yield of SO_3 produced by 8.96 g of S is 33.6 g

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2 years ago
What do scientists mean when they refer to population
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population is the number of species living in a given area if this is regarding biology or earth studies :)

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Binomial nomenclature example and sentence using that word<br><br> please help im going to cry
Alexandra [31]
What’s wrong? ...........:.........
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2 years ago
Whats two answers I know B is wrong
JulijaS [17]

Answer:A and D

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A compound A has prominent infrared absorptions at 1050, 1786, and 1852 cm–1 and shows a single absorption in the proton NMR spe
olya-2409 [2.1K]

Answer:

Compound A is succinic anhydride and B is methyl succinate (the monomethyl ester).

Structural Diagram is attached.

Explanation:

A.

Succinic anhydride appears as colorless needles or white crystalline solid. ... Succinic anhydride, also called dihydro-2, 5-furandione, is an organic compound with the molecular formula C4H4O3. It is the acid anhydride of succinic acid.

B.

Monomethyl succinate is a dicarboxylic acid monoester that is succinic acid in which one of the carboxy groups has been converted to its methyl ester. It is a dicarboxylic acid monoester and a hemisuccinate. ... They have the general structure RC(=O)OR', where R=fatty aliphatic tail or organyl group and R'=methyl group.

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2 years ago
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