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Setler79 [48]
3 years ago
9

PLSSSSSSSSS HELP!!!!!!!! FIRST TO AWNSER GETS BRAINLIEST!!!!!!!!

Chemistry
2 answers:
katrin [286]3 years ago
4 0

Answer:

measles are caused by virus

strep throat is caused by bacterium

aspergillosis caused by fungus

malaria caused by protist

hope this helps!

Explanation:

iris [78.8K]3 years ago
4 0
Measles are caused by a virus
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How many atoms are in 0.750 moles of zinc?
Ira Lisetskai [31]
1 mole Zn ---------- 6.02 x 10²³ atoms
0.750 moles Zn ----- ? 

atoms = 0.750 * ( 6.02 x 10²³ / 1 )

= 4.515 x 10²³ atoms

hope this helps!


4 0
4 years ago
Suppose you are given samples of pentane, 2,2-dimethylpropane, 2-methylbutane and hexane. how you would go about determining whi
Annette [7]

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Addiction

Explanation:

7 0
3 years ago
Tin(IV) sulfide, SnS2, a yellow pigment, can be produced using the following reaction.
Maksim231197 [3]

The theoretical yield of SnS_2 will be 4.20 grams while the percent yield will be 7.93%

<h3>How is yield calculated?</h3>

From the equation of the reaction, the mole ratio of SnBr_4 to Na_2S is 1:2.

Mole of 48.1 mL, 0.478 M  SnBr_4 = 0.478 x 48.1/100 = 0.023 mols

Mole of 48.8 mL, 0.160 M   Na_2S = 0.160 x 48.8/1000 = 0.0078 moles

SnBr_4Na_2S is the limiting reactant.

Mole ratio of  SnBr_4  and SnS_2 = 1:1

Equivalent mole of  SnS_2 = 0.023 moles

Mass of 0.023 noles SnS_2= 0.023 x 182.81 = 4.20 grams

With 0.0333 g of SnS_2 recovered, percent yield = 0.333/4.2 x 100 = 7.93%

More on yields of reactions can be found here: brainly.com/question/17042787

#SPJ1

Tin(IV) sulfide, SnS2, a yellow pigment, can be produced using the following reaction.

SnBr4(aq)+2Na2S(aq)⟶4NaBr(aq)+SnS2(s)

Suppose a student adds 48.1 mL of a 0.478 M solution of SnBr4 to 48.8 mL of a 0.160 M solution of Na2S.

1) Calculate the theoretical yield of SnS2. ;

2) The student recovers 0.333 g of SnS2. Calculate the percent yield of SnS2 that the student obtained.

7 0
2 years ago
T or F: Lone pairs around the oxygen atom of a water molecule play no role in determining its molecular geometry?
Mama L [17]

Answer:

Explanation:

They play a very important part. The geometry is not a straight line. It is an angle over 90 which means that the molecule has the same general shape as a boomerang. The two hydrogens and the 2 lone electron pairs try to get away as far as possible from each other. The actual shape results in a tetrahedron shape. But the two hydrogens and 1 oxygen actually look like the aforementioned boomerang.

5 0
3 years ago
Suppose that CO2 in the atmosphere was held at a constant, natural level for a few thousand years. Then, CO2 was added to double
MissTica

Answer:

temperature before the increase in CO2 was a few degrees lower than temperature after the increase.

Explanation:

CO2 in the atmosphere has the property of trapping heat by absorbing it. So, with increase in the level of CO2 in the atmosphere the more heat will be absorbed by it and hence the temperature before the increase in CO2 was a few degrees lower than temperature after the increase.

Level of CO2 ∝ Temperature of the Earth

8 0
3 years ago
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