All categories

3 years ago

Which of these is a compound??

Chemistry

2 answers:

Leona [35]3 years ago

8 0

I think it is C.potassium

koban [17]3 years ago

6 0

Potassium ......................

You might be interested in

Help please I need it

anastassius [24]

2 and 4 i think sorry if wrong

8 0

3 years ago

PLEASE HELP ME NO LINKS

Y_Kistochka [10]

Answer: I don’t think the answer is A or C. Maybe B.

The word chemosynthesis means

the synthesis of organic compounds by bacteria or other living organisms using energy derived from reactions involving inorganic chemicals, typically in the absence of sunlight.

Explanation:

3 0

3 years ago

Read 2 more answers

Scientist A produces 83.67 g KMnO4 while Scientist B produces 81.35 g KMnO4.

noname [10]

Answer:

$Y_A=92.1\%\\\\Y_B=89.6\%$

Explanation:

Hello there!

In this case, according to the given chemical equation for the reaction for the production of potassium permanganate, we can see a 2:2 mole ratio of this product to the starting manganese (II) oxide, which means, we can calculate the theoretical yield of the former via stoichiometry:

$m_{KMnO_4}=50.0gMnO_2*\frac{1molMnO_2}{86.94gMnO_2}*\frac{2molKMnO_4}{2molMnO_2} *\frac{158.034gKMnO_4}{1molKMnO_4} \\\\m_{KMnO_4}=90.9gKMnO_4$

Now, we are able to compute the percent yields, by using the actual yield each scientist got:

$Y_A=\frac{83.67g}{90.9g} *100\%=92.1\%\\\\Y_B=\frac{81.35g}{90.9g} *100\%=89.6\%$

Regards!

8 0

3 years ago

1. At 7 a.m., the science classroom had a temperature of 68°F. By 3 p.m., the temperature had

andrew11 [14]

A because chem is so cool and when you do that it equals the correct answer

8 0

3 years ago

Calculate the gravitional force in between two object of mass 25kg and 20kg if distance between them is 5m?

astraxan [27]

Answer:

Explanation:The equation for this is F = -GmM/R^2 where the minus sign says the force is attractive m is 10 kg, M is 20 kg and R is 5 meters. If you crunch the numbers you get an answer of:

7 0

3 years ago