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NISA [10]
3 years ago
11

What is the oxidation number of each phosphorus atom in H4P2O7

Chemistry
1 answer:
nekit [7.7K]3 years ago
7 0

Answer:

+5

Explanation:

The oxidation number of phosphorus can be obtained as follows:

H4P2O7 = 0

4(+1) + 2P + 7(—2) = 0

4 + 2P —14 = 0

Collect like terms

2P = 14 — 4

2P = 10

Divide both side by 2

P = 10/2

P = +5

The oxidation number of phosphorus is +5

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What is speed? If you walk 3 kilometers in 30 minutes, what is your average speed in kilometers per hour? Compare and contrast i
Mrrafil [7]

Answer:

See explanation

Explanation:

distance = 3 kilometres

time = 30 minutes or 0.5 hours

speed = distance/time = 3/0.5 = 6 Kmhr-1

Average speed is given by total distance covered divided by the total time taken while the instantaneous speed is the speed of an object at a particular instant or moment in time. Average speed refers to the whole journey while instantaneous speed refers to a particular point or instant in the journey.

distance= x

time = 3 hours

speed = 50 miles per hour

speed = distance/time

distance = speed * time

distance = 3 * 50

distance = 150 miles

3 0
2 years ago
If 4.5 moles of AlCl3 were made, how many moles of CuCl2 were used?
Troyanec [42]

Answer:

6.75 moles of CuCl₂ were used

Explanation:

Given data:

Number of moles of AlCl₃ formed = 4.5 mol

Number of moles of CuCl₂ used = ?

Solution:

Chemical equation:

3CuCl₂ + 2Al  →   2AlCl₃ + 3Cu

Now we will compare the moles of CuCl₂ and AlCl₃

               AlCl₃       :      CuCl₂

                   2         :        3

                 4.5        :      3/2×4.5 = 6.75

6.75 moles of CuCl₂ were used.

7 0
2 years ago
What did rutherford's gold foil experiment tell about the atom
yawa3891 [41]

Answer:

The alpha particles that were fired at the gold foil were positively charged. ... These experiments led Rutherford to describe the atom as containing mostly empty space, with a very small, dense, positively charged nucleus at the center, which contained most of the mass of the atom, with the electrons orbiting the nucleus.

8 0
2 years ago
What is the theoretical yield of something if 20g are formed with a 10% yield
Sauron [17]
To predict the theoretical yield we would have to know the amount we of product we actually produced in a reaction, and the amount that should have been produced based on calculations involving the balanced equation for the reaction.

For instance, suppose we made water from hydrogen and oxygen.  Starting with 2 moles of hydrogen and 1 mole of oxygen we should produce 2 moles of water (or 36 gram).  But suppose we actually ran the reaction in the lab and collected only 34g of water.

The percent yield would be 34g / 36g   x 100 =94.4%

 

So, if I'm reading your question correctly, 20g is the experimental yield and 10% is the percent yield.

Plugging in gives us                               10/100 =  20/x

The theoretical yield must be 200g.

.



I HOPE THAT HELP MY FRIEND :)

3 0
2 years ago
Which is not considered a water flow?
Artemon [7]
Rain maybe?? Cause it doesn’t flow??? It comes out of the sky?? Sorry if its wrong or sth
6 0
3 years ago
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