Write a chemical formula for NH4+ and PO43

When aluminium and chlorine compared , which has smaller atomic size ? Why ?

Zielflug [23.3K]

Chlorine has a smaller atomic size.
Explanation: As you move towards right of the periodic table, the atomic size decreases. This is because the number of protons is increasing towards the right of the periodic table, which applies a greater inward force on the electrons. that is why the elements on the right of the periodic table have a smaller atomic size when compared to the elements on the left. Since chlorine is on the right side of aluminium, it has a smaller atomic size.

7 0

3 years ago

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4. Think and discuss: Why is there an attraction between the two ions in this chemical bond?

Iteru [2.4K]

Answer:

One atom will give electrons to another atom to fill its shell, this is an ionic bond. The atom giving away electrons becomes positive and the one recieving electrons becomes negative.

Hope this helps

Explanation:

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3 years ago

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What effect does an increase in products have on the reaction rate of a mixture at equilibrium? A. The forward reaction rate inc

Anna007 [38]

Answer:

D. The reverse reaction rate increases.

Explanation:

The rate of reverse increases if the products are increased in a mixture at equilibrium.

At first, rate of forward and backward reactions are same for a mixture in equilibrium. 

If we add products or,the reaction moves to the opposite side I.e towards reactants side.

so,according to the Le Chateliers principle,the reaction shifts opposite to the side of increase. so,according to the Le Chateliers priciple, the rate of reverse or backward reaction will increase with the increase in the products.

4 0

3 years ago

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide. Ca) + H2O --> Ca(OH)2 In a particular

mars1129 [50]

Answer:

Percent yield = 92.5%

Explanation:

The question asks for the percent yield which can be defined as:

$\frac{actual yield}{theoretical yield} .100$

Where the actual yield is how much product was obtained, in this case 6.11 g of Ca(OH)₂, and the theoretical yield is how much product could be obtained with the given reactants theoretically, that is if the reaction would work perfectly. So we need to calculate first the theoretical yield.

1. First lets write the chemical equation reaction correctly and check that it is balanced:

CaO + H₂O → Ca(OH)₂

2. Calculate the amount of product Ca(OH)₂ that can be obtained with the given reactants (theoretical yield), which are 5.00g of CaO and excess of water. So the amount of CaO will determined how much Ca(OH)₂ we can obtained.

For this we'll use the molar ratio between CaO and Ca(OH)₂ which we see it is 1:1. For every mol of CaO we'll obtain a mol of Ca(OH)₂. So lets convert the 5.00 g of CaO to moles:

Molar Mass of CaO: 40.078 + 15.999 = 56.077 g/mol

moles of CaO = 5.00 g / 56.077 g/mol = 0.08916 moles

As we said before from the molar ratio moles of Ca(OH)₂ = moles of CaO

So the moles of Ca(OH)₂ that can be obtained are 56.077 g/mol

We need to convert this value to grams:

Molar Mass of Ca(OH)₂ = 40.078 + (15.999 + 1.008)*2 = 74.092 g/mol

Theoretical yield of Ca(OH)₂ = 0.08916 moles x 74.092 g/mol = 6.606 g

3. Calculate the percent yield:

$\frac{actual yield}{theoretical yield} .100$

Percent yield = (6.11 g / 6.606g) x 100 = 92.5 %

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3 years ago

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I have asked this question before but I was not clear enough. I want to prepare a 37% w/w solution (in water)of sulfuric acid fr

Zarrin [17]

Actually you have now a roport of 4:96 water to acid . All you have to do is add water to bring the raport to 37 acid and 63 water.
You need to have 0.5L mixture so
you have to have 18.5acid and the rest water 31.5
so for 18.5 acid you need to add 192.7 ml 96% acid and the rest water

4 0

4 years ago

Write a chemical formula for NH4+ and PO43–