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Archy [21]
3 years ago
12

According to Ohm’s law, if V is voltage, I is current, and R is resistance, their relationship is expressed by the equation

Chemistry
1 answer:
stepan [7]3 years ago
6 0
V=IxR       v equals i multiplied by r therefore you can find any of the three by moving around the parts of the equation
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Sodium metal and water react to create sodium hydrogen and hydrogen gas through the unbalanced equation.
Maurinko [17]

Answer:

Theoretical yield = 2.5 g

Explanation:

Given data:

Mass of sodium = 79.7 g

Mass of water = 45.3 g

Theoretical yield of hydrogen gas = ?

Solution:

Chemical equation:

2Na + 2H₂O → 2NaOH + H₂

Number of moles of sodium:

Number of moles = mass/ molar mass

Number of moles = 79.7 g / 23 g/mol

Number of moles = 3.5 mol

Number of moles of water:

Number of moles = mass/ molar mass

Number of moles = 45.3 g / 18g/mol

Number of moles = 2.5 mol

Now we will compare the moles of hydrogen gas with water and sodium.

                        H₂O           :             H₂

                           2             :              1

                          2.5           :            1/2×2.5 =1.25 mol

                     

                           Na           :              H₂

                             2            :               1

                           3.5           :             1/2×3.5 =1.75 mol

water will be limiting reactant.

Theoretical yield:

Mass = number of moles × molar mass

Mass =  1.25 mol  × 2 g/mol

Mass = 2.5 g

8 0
3 years ago
Please help!! I don’t think I did this right.?
harkovskaia [24]

Answer:

It was done correctly, Your answer is completely correct.

Explanation:

8 0
3 years ago
Read 2 more answers
Match each term with the correct location on a trophic pyramid.
zubka84 [21]

Answer:

I think it's C

hope this helps

6 0
2 years ago
Is cold water more dense
Paraphin [41]
Cold water<span> is </span>more dense<span> and will sink in room-temperature </span>water<span>. hope it helps :)</span>
5 0
3 years ago
Need help with question 4.) hurry please ASAP
Vanyuwa [196]

Answer:

a mixture that is made when one substance dissolves and mixes with another substance

6 0
3 years ago
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