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timama [110]
3 years ago
9

CAN SOMEONE HELP ME ON SCIENCE?!!! I NEED HELP. ITS JUST TRUE OR FALSE. I DONT UNDERSTAND. PLZ HELP ME!! TODAY. 1-6. I AINT CHEA

TING. THERE IS ACTUALLY 15 QUESTIONS BUT I JUST NEED THIS 6. PLZ HELP!!!

Chemistry
1 answer:
Aleksandr-060686 [28]3 years ago
3 0
Hi sorry i dont know this i know alot about science but i dont know this
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Explain what would happen to the air temperature at Riverdale School over the course of the
Ira Lisetskai [31]

Answer:

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2 years ago
ASAP please and thankyou<br><br>Options:<br>pollen<br>pistil<br>purple<br>white​
AURORKA [14]

Answer:

pistil

Explanation:

5 0
3 years ago
Which piece of equipment would be most useful for measuring the volume of some water?
kicyunya [14]
<span>graduated cylinder is the answer</span>
5 0
3 years ago
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Students in a chemistry class added 5 g of Zinc to 50 g of hydrochloric acid. A chemical reaction occurred that produced zinc ch
Vinil7 [7]

Answer:

Mass = 11 g

Explanation:

Given data:

Mass of Zn = 5 g

Mass of HCl = 50 g

Mass of hydrogen gas produced = 6 g

Mass of zinc chloride produced = ?

Solution:

Chemical equation:

Zn + 2HCl    →   ZnCl₂ + H₂

Number of moles of Zn:

Number of moles = mass / molar mass

Number of moles = 5 g / 65.38 g/mol

Number of moles = 0.08 mol

Number of moles of HCl :

Number of moles = mass / molar mass

Number of moles = 50 g / 36.5 g/mol

Number of moles = 1.4 mol

Now we will compare the moles of both reactant with zinc chloride.

              Zn           :           ZnCl₂

               1             :             1

              0.08       :        0.08

            HCl          :         ZnCl₂

              2            :           1

             1.4          :         1/2×1.4 =0.7 mol

The number of moles of zinc chloride produced by Zn are less so it will limiting reactant.

Mass of zinc chloride:

Mass = number of moles × molar mass

Mass = 0.08 mol × 136.3 g/mol

Mass = 11 g

5 0
3 years ago
The diagram below shows the positions of the Earth, Moon, and Sun. What is the date?
Anna35 [415]
Answer is: <span>B) June 21.
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3 years ago
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