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julia-pushkina [17]
3 years ago
15

Take a look at this dandelion. The yellow flower on the right is _______ pollinated and the seeds on the left are transported by

___________. A) wind; water B) insect; wind C) insect; birds D) animals; water
Chemistry
2 answers:
bearhunter [10]3 years ago
8 0

Answer:

gay bowsah

Explanation:

tester [92]3 years ago
3 0
The answer is A,
The yellow flower on the right is wind pollinated and the seeds on the left are transported by water.
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Consider the voltaic cellZn(s) + Cu{2+}(aq)--> Zn{2+}(aq)+Cu(s){}=chargeUnder standard conditions, what is the maximum electr
blondinia [14]

Answer:

Max. work done in 60 g of copper plated out is 200472.14 J

Explanation:

Given cell reaction is:

Zn(s)+Cu^{2+} \rightarrow Zn^{2+}+Cu(s)

Standard reduction potential of Zn electrode (E_{Zn^{2+}/Zn}) is 0.763 V.

Standard reduction potential of Cu electrode (E_{Cu^{2+}/Cu}) is -0.337 V.

Copper acts as cathode and Zinc acts as anode.

Cell potential (E) = E° cathode - E° anode

                           = 0.763 - (-0.337)

                           = 1.10 V

formula for the work done is as follows:

W_{max}=-nFE

Here, n is no. of electron involved in the reaction.

F(Faraday's constant) = 96500

In the given reaction, n = 2

W_{max}=-nFE\\=-2 \times\ 96500 \times 1.10\\=-212300\ J/mol

Therefore, 212300 J work is done by reducting 1 mol of copper.

Copper given is 60 g.

Molecular mass of copper is 63.54 g/mol.

No.\ of\ mol = \frac{60\ g}{63.54\ g/mol}

Max. work done in 60 g of copper plated out is:

W_{max}=212300\ J/mol \times \frac{60\ g}{63.54\ g/mol} \\=200472.14\ J

3 0
2 years ago
Which are examples of biotic factors? Select three options.
alina1380 [7]

The biotic factors are bacteria soil, dead leaves, and stream water.

<h3>What is an abiotic factor?</h3>

An abiotic factor is a non-living part of an ecosystem that shapes its environment.

Biotic and abiotic factors make up a community via interaction.

Biotic factors are considered living things (having "life") while abiotic factors are simply non-living things.

The dead leaves of plants are an abiotic factor, the bacteria in soil are living matter and stream flowing, etc.

Hence, the biotic factors are bacteria soil, dead leaves, and stream water.

Learn more about the abiotic factor here:

brainly.com/question/12689972

#SPJ1

6 0
1 year ago
Air containing 20.0 mol% water vapor at an initial pressure of 1 atm absolute is cooled in a 1- liter sealed vessel from 200°C t
chubhunter [2.5K]

Answer:

This solution is quite lengthy

Total system = nRT

n was solved to be 0.02575

nH20 = 0.2x0.02575

= 0.00515

Nair = 0.0206

PH20 = 0.19999

Pair = 1-0.19999

= 0.80001

At 15⁰c

Pair = 0.4786atm

I used antoine's equation to get pressure

The pressure = 0.50

2. Moles of water vapor = 0.0007084

Moles of condensed water = 0.0044416

Grams of condensed water = 0.07994

Please refer to attachment. All solution is in there.

6 0
3 years ago
If you begin with 2.7 g Al and 4.05 g Cl2, what mass of AlCl3 can be produced?
Tresset [83]
<span>atomic weights: Al = 26.98, Cl = 35.45 In this reaction; 2Al = 53.96 and 3Cl2 = 212.7 Ratio of Al:Cl = 53.96/212.7 = 0.2537 that is approximately four times the mass Cl is needed. Step 2: (a) Ratio of Al:Cl = 2.70/4.05 = 0.6667 since the ratio is greater than 0.2537 the divisor which is Cl is not big enough to give a smaller ratio equal to 0.2537. so Cl is limiting (b)since Cl is the limiting reactant 4.05g will be used to determine the mass of AlCl3 that can be produced. From Step 1: 212.7g of Cl will produce 266.66g AlCl3 212.7g = 266.66g 4.05g = x x = 5.08g of AlCl3 can be produced (c) Al:Cl = 0.2537 Al:Cl = Al:4.05 = 0.2537 mass of Al used in reaction = 4.05 x 0.2537 = 1.027g Excess reactant = 2.70 - 1.027 = 1.67g King Leo · 9 years ago</span>
8 0
3 years ago
What is the approximate pressure of a storage cylinder of recovered R-404A that does not contain any non-condensable impurities
gregori [183]

Answer:

288 psig

Explanation:

4 0
3 years ago
Read 2 more answers
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