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Tatiana [17]
2 years ago
14

What three types of Protists have been discovered

Chemistry
2 answers:
frosja888 [35]2 years ago
8 0

Answer:

the answer is D

Explanation:

but hope this helps

Musya8 [376]2 years ago
7 0

Answer:

Yo, wassup I think its D.

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Using the balanced equation below,
Zielflug [23.3K]

Answer:

Mass = 6.538 g

Explanation:

Given data:

Mass of zinc hydroxide produced = 9.65 g

Mass of zinc required = ?

Solution:

Chemical equation:

Zn + 2MnO₂ + H₂O      →      Zn(OH)₂ + Mn₂O₃

Number of moles of zinc hydroxide:

Number of moles = mass/molar mass

Number of moles = 9.65 g/ 99.42 g/mol

Number of moles = 0.1 mol

now we will compare the moles of zinc and zinc hydroxide,

                  Zn(OH)₂           :          Zn

                       1                  :          1

                    0.1                  :         0.1

Mass of zinc required:

Mass = number of moles × molar mass

Mass = 0.1 mol × 65.38 g/mol

Mass = 6.538 g

8 0
3 years ago
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Water from a lake changes to a gas state in the process of what?
boyakko [2]
Of heating. Or when the lake is exposed to boil because of the temperature.
7 0
3 years ago
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do you think that the continental plates continue to move across the surface of the earth? what evidence do you have to support
cestrela7 [59]
Yes I think & I Belive it moves across the surface
5 0
3 years ago
How does an objects speed affect its kinetic energy?​
rewona [7]
Because it’s kinetic energy INCREASES the speed
8 0
2 years ago
How many grams of ca are needed to react completely with 2.20 L of a 4.50 m hcl solution
Dmitry_Shevchenko [17]
Ca + 2HCl = CaCl₂ + H₂

c=4.50 mol/l
v=2.20 l

n(HCl)=cv

m(Ca)/M(Ca)=n(HCl)/2

m(Ca)=M(Ca)cv/2

m(Ca)=40g/mol·4.50mol/l·2.20l/2=198 g

198 grams of Ca are needed

5 0
3 years ago
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