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goldenfox [79]
3 years ago
9

Chem homework, help?

Chemistry
1 answer:
IrinaVladis [17]3 years ago
4 0
I'm not writing random things to reach the 20 character requirement so I can tell you that Magnesium has the least amount of atoms.
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Which statement is right please explain giving brainliest
Anna11 [10]

Answer:

D

Explanation:

Because if I said its 35 degrees outside that has nothing to do with climate maybe if I said its usually 35 degrees in the month of December but just saying what temperature it doesn't tell you anything about climate

Well, the definition of climate is the weather conditions prevailing in an area in general or over a long period so I don't really know

So maybe it is d

7 0
3 years ago
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The molarity of a solution of 5.0 g of kcl in 100. ml of solution is ________.
sdas [7]
Molarity is defined as the number of moles of solute in 1 L of solution 
mass fo KCl in the solution is - 5.0 g
number of moles of KCl - 5.0 g/ 74.5 g/mol  = 0.067 mol
number of moles of KCl in 100 mL - 0.067 mol
therefore number of KCl moles in 1 L - 0.067 / 100 mL x 1000 mL = 0.67 M
molarity of KCl is 0.67 M
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Do you agree with using pesticides that kill honeybees? What better alternative to pesticides could farmers use and explain the
AveGali [126]

Answer:

I do not agree with using pesticides as it is a chemical and can inflict poison in the system. A better alternative would be using smoke to keep the pests away or some natural pesticide. The effect would most likely be lower quantities of crops and higher food prices however.

Explanation:

this is the possible answer on edg.

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When electrons move to a shell closer to the nucleus, energy is released as
Zarrin [17]

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it is released as lower energy

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3 years ago
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26 grams of 2,2 dimethyl hexane( C8H16) under goes combustion. How
sattari [20]

Answer: The CO_{2} gas occupies a space of 5.57 L at 26 Celsius and 101.75 kPa.

Explanation:

Given: Mass = 26 g

Pressure = 101.75 kPa

Convert kPa into atm as follows.

1 kPa = 0.00986923 atm\\101.75 kPa = 101.75 kPa \times \frac{0.00986923 atm}{1 kPa}\\= 1 atm

Temperature = 26^{o}C = (26 + 273) K = 299 K

Now, moles of a substance is defined as mass of substance divided by its molar mass.

As molar mass of 2,2 dimethyl hexane is 114.23 g/mol. So, its number of moles are calculated as follows.

No. of moles = \frac{mass}{molar mass}\\= \frac{26}{114.23 g/mol}\\= 0.227 mol

Formula used to calculate the volume is as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

PV = nRT\\1 atm \times V = 0.227 mol \times 0.0821 L atm/mol K \times 299 K\\V = 5.57 L

Thus, we can conclude that the CO_{2} gas occupies a space of 5.57 L at 26 Celsius and 101.75 kPa.

3 0
2 years ago
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