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4 years ago

Starting with the sun,what energy transformations take place when cows graze in a meadow?

1 answer:

6 0

Heat and light energy gets transformed as energy for the plants to grow via the process of photosynthesis. The cows eat the grass, using the grass as an energy source to live and move around. Thus the grass, though indirectly, provides a means of kinetic energy that the cows use to move around and graze in the meadow.

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Which of the following is federal student aid that does not have to be paid

SSSSS [86.1K]

Your answer is A grants

5 0

3 years ago

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How many grams of lead product would theoretically be produced between 17. 0 g potassium iodide, ki, and 25. 0 g of lead (ii) ni

Fantom [35]

The number of grams of lead product that would theoretically be produced from the given reaction is; <u><em>Mass of lead product = 23.6 g</em></u>

Potassium iodide reacting with Lead(II) Nitrate would yield the balanced equation;

2KI + Pb(NO₃)₂ = 2KNO₃ + PbI₂

2moles : 1 mole = 2 moles : 1 mole

From online tables;

Molar mass of KI = 166 g/mol

Molar mass of Pb(NO₃)₂ = 331.2 g/mol

We are given;

Mass of KI = 17 g

Mass of Pb(NO₃)₂ = 25 g

Thus;

Number of moles of PbI₂ yielded in order to find the limiting reactant will be;

no of moles of PbI₂ from KI = (17g/166 g/mol) × (1 mole of PbI₂/2 mol of KI)

no of moles of PbI₂ from KI = 0.0512 mols

Similarly;

no of moles of PbI₂ from Pb(NO₃)₂ = (25g/331.2 g/mol) × (1 mole of PbI₂/1 mol of Pb(NO₃)₂)

no of moles of PbI₂ from Pb(NO₃)₂ = 0.0755 moles

We can see that KI produced the least amount of moles. Thus;

Mass = 0.0512 * molar mass of PbI₂

From tables, molar mass of PbI₂ = 461 g/mol

Thus;

Mass of lead product = 461 * 0.0512

Mass of lead product = 23.6 g

Read more about theoretical yield at; brainly.com/question/21091465

5 0

2 years ago

Which reaction will most likely take place based on the activity series? li > k > ba > ca > na > mn > zn >

Ivenika [448]

The only reaction that will most likely take place based on the activity series is; C: Ba + Na₂CO₃

<h3>Activity Series</h3>

From the activity series given, we can say that during a displacement reaction, the more reactive metal will always displace the lesser reactive metal from a compound.

Let us look at each of the given options;

A) Ag + FeCl₃

From the activity series, Silver(Ag) is less reactive than Iron(Fe) and as such Silver cannot displace iron from its' compound.

B) Zn + CaO

Zinc (Zn) is a less reactive metal than Calcium (Ca), so it cannot cannot displace Calcium from its' compound.

C) Ba + Na₂CO₃

Barium (Ba) is a more reactive metal than Sodium (Na), and therefore Barium will displace sodium from its compound in a displacement reaction.

D) Cr + KNO₃

Chromium (Cr) is a lesser reactive metal than Potassium (K), and it therefore cannot displace Potassium from its compound.

Complete question is;

Which reaction will most likely take place based on the activity series? Li > K Ba > CaNa > Mn > Zn > Cr> Fe> Cd Ni > H > Sb > Cu > Ag > Pd > Hg > Pt

A. Ag + FeCl₃

B. Zn + CaO

C. Ba + Na₂CO₃

D. Cr + KNO₃

Read more about Activity Series at; brainly.com/question/17469010

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2 years ago

His worrying nature and his ______________ were the results of a constant fear of death.

umka21 [38]

I think the answer is D

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3 years ago

SOME ONE HELP WITH THIS 5 QUESTIONS !!!!!!!!!!!! Packet economics

Solnce55 [7]

I don't know if I'm right but I think is:

1- D
2-A
3-C
4-A

3 0

3 years ago

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