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3 years ago

A thermodynamic cycle which works to cause heat to flow from a cold resorption to a hotter reservoir is called?

Chemistry

2 answers:

Anni [7]3 years ago

5 0

Answer:

a. a heat reservoir

Explanation:

Flauer [41]3 years ago

4 0

Answer:

a and c

Explanation:

I ain't sure I legit found ur quiz do u want me to do it and send the anwsers?

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How many grams of oxygen are required to react with 12.0 grams of octane(C8H18) in the combustion of octane in gasoline?

solniwko [45]

Answer : 42 grams of oxygen are required.

Explanation :

Step 1 : Write balanced chemical equation.

The combustion reaction of octane with oxygen can be written as,

$2 C_{8}H{18} (g) + 25 O_{2} (g) \rightarrow 16 CO_{2} (g) +18 H_{2}O (g)$

Step 2 : Find moles of octane.

The given mass of octane is 12 g

Molar mass of octane is 114.2 g/mol

The moles of octane are calculated as,

$moles =\frac{grams}{MolarMass} =\frac{12g}{114.2g/mol} = 0.105 mol$

We have 0.105 mol octane.

Step 3: Use mole ratio from balanced equation to find moles of O₂

The mole ratio of octane and O₂ is 2 : 25. Let us use this as a conversion factor.

$0.105 mol C_{8}H_{18} \times\frac{25mol O_{2}}{2molC_{8}H_{18}} = 1.31 mol$

We have 1.31 mol O₂.

Step 4 : Convert moles of O₂ to grams.

The molar mass of O₂ is 32 g/mol.

The grams of O₂ can be calculated as,

$1.31 mol O_{2} \times\frac{32g}{mol} = 42 grams$

42 grams of oxygen are required.

8 0

3 years ago

Choose the correct statement.

nata0808 [166]

Answer:

Explanation:

single displacement replaces one element with another and it's product is a pure element.

4 0

3 years ago

43. Which of the following statements concerning the action of G proteins on adenylate cyclase is true? I. G proteins always ser

ExtremeBDS [4]

Answer:

Some G proteins activate adenylate cyclase, while others inhibit it.

Explanation:

G proteins helps in the signal transduction process that transfer message in the body. GPCRs (G-protein-coupled receptors) are located on the surface membrane of the cell.

The G protein can activates the protein or might deactivate the proteins that helps in the adenylate cyclase. The particular phosphorylation and dephosphorylation process at different sites by the G proteins can result in activation and inactivation of adenylate cyclase.

Thus, the correct answer is option (C).

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4 years ago

Answerrrrrrrrrrrrrrrrrr

Drupady [299]

The answer is B.) Energy directly from the sun to both producers and consumers.

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3 years ago

What are the advantages and disadvantages of using renewable and nonrenewable energy resources?

nikklg [1K]

Answer:an advantage for using a renewable resources is the it really dont take up oil a it could be renewed one disadvantage is that it cost alot

on advantage for a non renewable is that it doesnt cost alot and one disadvantage is that it can't be renewed

Explanation:

5 0

3 years ago