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kolbaska11 [484]
3 years ago
14

Hey! Please help. Will mark brainlist if u are right, ty

Chemistry
1 answer:
Tema [17]3 years ago
8 0

Answer:

40 hopefully right

Explanation:

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I point
Mrrafil [7]

The ionization constant equation is:

K_{w}=1.0 × 10^{-14} at 25°C

the option is 1.

Explanation:

Sometimes in pure water one proton of the water molecule(hydrogen ion) will get attracted to the lone pairs present in another water molecule.This causes the hydrogen ion to leave the present water(leaving the OH^{-} behind) molecule ad gets attached to another water molecule leading  to the formation of the hydronium ion(H^{3} O{+},hydronium ion).

This process is called auto-ionization of water because the water molecule ionizes into H^{+} and OH^{-} ions.

<h2>H_{2}O<u>+</u>H_{2} O<u>→</u>H^{3} O{+}<u> + </u>OH^{-}</h2>

As such the equilibrium constant,which is measure of concentration of products to concentration of reactants,will be very slow.

∴the ionization constant of water at 25°C is 1.0 × 10^{-14}.

(i.e.)option<u> c</u> is correct answer [H^{+}]=[OH^{-}]

4 0
4 years ago
How many grams of aluminum oxide will you need to start with in order to make 6500 g of aluminum hydroxide?
kherson [118]

Answer:

Explanation:

2Al(s) + 3 2 O2(g) → Al2O3(s) And given the stoichiometry ...and EXCESS dioxygen gas...we would get 6.25⋅ mol of alumina. the which represents a mass... ...6.25 ⋅ mol ×101.96 ⋅ g ⋅ mol−1 molar mass of alumina ≡ 637.25 ⋅ g.

3 0
3 years ago
Read 2 more answers
If different masses of water are heated to the same temperature, which sample will absorb more energy? Base your argument on the
MArishka [77]

Answer:

Heat, energy that is transferred from one body to another as the result of a difference in temperature.

Explanation:

5 0
3 years ago
What mass of Na2SO4 is needed to make 2.5L of 2.0M solution? (Na=23g; S=32g; O=16g)
zaharov [31]
The molar mass of Na₂SO₄ - 
2 x Na - 2 x23 = 46
1 x S - 1 x 32 = 32 
4 x O - 4 x 16 = 64 
total = 46 + 32 + 64 = 142 g/mol
the molarity of solution - 2.0 M 
in 1 L of solution , 2.0 moles
Therefore in 2.5 L - 2 mol/L x 2.5 L = 5 mol
then the mass of Na₂SO₄ required = 142 g/mol x 5 mol = 710 g
8 0
3 years ago
Read 2 more answers
Use the following equation to answer questions 2 and 3. (Use the mole ratio for these problems only!)
MAVERICK [17]

Answer:

5.34 moles of NO_2 are required to produce 3.56 mol of HNO_3.

0.83 moles of water react with 2.5 moles of NO_2.

Explanation:

i) 3NO_2+H_2O\rightarrow 2HNO_3+NO

Moles of HNO_3 we want to produce = 3.56 moles

According to reaction, 2 moles of HNO_3 are obtained from 3 moles of NO_2

Then 3.56 moles of HNO_3 will be obtained from :

\frac{3}{2}\times 3.56 mol=5.34 mol of HNO_3

5.34 moles of NO_2 are required to produce 3.56 mol of HNO_3.

ii)

Moles of NO_2 = 2.5 moles

According to reaction,3 moles of NO_2 reacts with 1 mole of H_2O,then 2.5 moles of NO_2 will react with :

\frac{1}{3}\times 2.5 mol=0.83 mol of H_2O

0.83 moles of water react with 2.5 moles of NO_2.

4 0
3 years ago
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