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alexandr402 [8]
2 years ago
14

When one form of energy is converted to another form in any physical or chemical change, energy input alwasy equals energy outpu

t?
Chemistry
1 answer:
aliya0001 [1]2 years ago
5 0
In the context of chemistry, yes. Energy input is always equal to the energy output.
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When a predator population increases what happens to the prey population? Increase Decrease Dies Stays the same
AnnyKZ [126]

Answer: as the number of predators increases, more prey are captured. as a result the prey population starts to decrease.

8 0
3 years ago
22.6 grams of mercury ii nitrate, hg(no3)2 reacts with an excess of potassium, k. how many grams of mercury is formed? the other
pentagon [3]

Mass = 14.0 g of mercury is formed, 22.6 grams of mercury nitrate, hg(no3)2 reacts with an excess of potassium, k.

An inorganic substance with the formula Hg(NO3)2xH2O is mercury nitrate. Hot, concentrated nitric acid is used to process mercury to create it. By using X-ray crystallography, neither anhydrous nor monohydrate have been verified. The drug might have an impact on the kidneys, peripheral nervous system, and central nervous system. Ataxia, tremors. Given data: Mass of mercury nitrate = 22.17 g, Mass of mercury formed = ?

Solution:

Chemical equation:

Hg(NO₃)₂ + 2K    →    2KNO₃ + Hg

Number of moles of mercury nitrate:, Number of moles = mass/molar mass, Number of moles = 22.17 g / 324.6 g/mol, Number of moles = 0.07 mol, Now we will compare the moles of Hg(NO₃)₂ and mercury.

             Hg(NO₃)₂       :        Hg

                 1                :          1

              0.07             :       0.07

Mass of mercury: Mass = number of moles × molar mass, Mass = 0.07 mol × 200.6 g/mol

Mass = 14.0 g

Learn more about mercury nitrate here:

brainly.com/question/4588222

#SPJ4

5 0
1 year ago
1. 2KCIO3, -- 2KCI + 302<br> How many moles of O2 will be produced from 2.25 moles of KCIO3?
Scilla [17]

Answer:

3.375moles of O₂

Explanation:

The reaction expression is given as;

                   2KClO₃ → 2KCl + 3O₂

Number of moles of KClO₃  = 2.25moles

Now;

To find the number of moles of O₂ produced we use known number of moles.

So;

                  2 mole of KClO₃ will produce 3 moles of O₂

                 2.25moles of KClO₃ will produce \frac{2.25 x 3}{2}   = 3.375moles of O₂

8 0
2 years ago
A sample of 8.00 g of Mg(OH)2 is added to 24.2 mL of 0.205 M HNO3. How many moles of Mg(OH)2 our present after the reaction is c
kogti [31]

The amount of Mg(OH)2  present after the reaction is complete is 0.136 moles of Mg(OH)2.

The equation of the reaction is;

2HNO3(aq) + Mg(OH)2(aq) -------> Mg(NO3)2(aq) + 2H2O(l)

Number of moles of Mg(OH)2 = 8.00 g/58 g/mol = 0.138 moles

Number of moles of HNO3 = 0.205 M × 24.2 mL/1000 = 0.00496 moles

Given that;

2 moles of HNO3 reacts with 1 mole of Mg(OH)2

0.00496 moles of HNO3 reacts with 0.00496 moles ×  1 mole /2 moles = 0.00248 moles of Mg(OH)2

Hence, Mg(OH)2 is the reactant in excess.

The amount of Mg(OH)2 remaining = Amount present - Amount reacted

Hence; 0.138 moles - 0.00248 moles = 0.136 moles of Mg(OH)2

Learn more: brainly.com/question/9743981

6 0
2 years ago
Please help me fast!!!
Dominik [7]
3 is trans form 4 is subsection zone and 5is convergent
3 0
2 years ago
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