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4 years ago

Please help me!!!!!!!!

Chemistry

1 answer:

IrinaVladis [17]4 years ago

7 0

Its surface runoff as shown in the diagram.

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If you were to observe a handful of soil, what materials would you MOST LIKELY find?

zhuklara [117]

Please Give me Brainliest

(1) A. (weathered rock and decomposed organic remains)

(2) B. (Use more land to plant crops)

(3) D. (top soil; organic matter)

(4) C. (They decompose the remains of plants and animals and add nutrients back to the soil)

(5) C. (Physical weathering)

(6) D. (The plates that formed these mountains were once under an ocean)

(7) B. (The water from her gutter pipe was washing away the soil in her flowerbed)

(8) A. (erosion)

(9) B. (Area A was completely underwater in the past)

(10) B. (Soil #2)

(11) B. (loam)

(12) D. (sediment)

Wow that took me more than an hour well Thanks And I hope I get brainliest because I worked soo hard

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6 0

3 years ago

Read 2 more answers

What is the volume of 7.50 x 10^24 molecules of NH3 at STP?

Allushta [10]

27.9L

Explanation:

Given parameters:

Number of molecules = 7.5 x 10²⁴molecules

Condition = STP

Unknown:

Volume of gas = ?

Solution;

The volume of gas at STP is expressed below;

Volume of gas = number of moles x 22.4

Number of moles = $\frac{Number of molecules }{6.02 x 10^{23} }$

Now if we can obtain the value of the number of moles from the expression above, we can plug it back into the equation of the volume of gas at STP;

Number of moles of NH₃ = $\frac{[tex]7.5 x 10^{24}$ }{6.02 x 10^{23} }[/tex]

Number of moles of NH₃ = 12.5moles

Volume of gas = 12.5 x 22.4 = 27.9L

learn more:

Volume of gas at STP brainly.com/question/7795301

#learnwithBrainly

3 0

3 years ago

Two motivations for the development of

7nadin3 [17]

Answer:

True

Explanation:

Because fossil fuels are non-renewable resources and that means it take thousands of years to form. Also, it harm the environment and create this climate change. While renewable resources, however, don't take thousand of years to form and it do not harm the environment.

8 0

4 years ago

Which of the elements has the same Lewis dot structure as calcium (Ca)?

cricket20 [7]

It’s gonna be which ever element(s) that has the same number of valence electrons!!

3 0

3 years ago

Read 2 more answers

Help plz:)))I’ll mark u Brainliest

emmasim [6.3K]

Answer:

$\Delta _{fus}H=205J/g=13.03kJ/mol$

Explanation:

Hello there!

In this case, since the heat of fusion is a property that allows us to calculate the heat involved during the change from solid to liquid (fusion) and is calculated as shown below:

$Q=m*\Delta _{fus}H$

In such a way, given the heat involved during this process and the mass of copper, we calculate the heat of fusion as shown below:

$\Delta _{fus}H=\frac{Q}{m}=\frac{41000J}{200.g}\\\\\Delta _{fus}H=205J/g$

Or in kJ/mol:

$\Delta _{fus}H=205\frac{J}{gCu}*\frac{63.546 gCu}{1molCu}\\\\ \Delta _{fus}H=13026.93J/mol=13.03kJ/mol$

Regards!

8 0

3 years ago