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aleksandrvk [35]
3 years ago
6

In the reaction, 2K (s) + 2H2O (l) produces 2KOH (aq) produces H2 (g), which of the reactants is a solid

Chemistry
1 answer:
Angelina_Jolie [31]3 years ago
3 0

Answer:

k

Explanation:

2K (s) + 2H2O (l) produces 2KOH (aq) produces H2 (g),

2K (s) + 2H2O (l) --> 2KOH (aq) + H2 (g)

(s) = solid

(l) = liquid

(g) = gas

Left hand side are reactants

2K (s) + 2H2O (l)

Right hand side are products

2KOH (aq) + H2 (g)

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Phosphate buffers are commonly used in biological research. If a small amount of strong acid is added to a buffer solution that
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Answer:

A) [H3PO4] will increase, [KH2PO4] will decrease, and pH will slightly decrease.

Explanation:

A buffer is a solution which resists changes to its pH when a small amount of acid or base is added to it.

Buffers consist of a weak acid (HA) and its conjugate base (A–) or a weak base and its conjugate acid. Weak acids and bases do not completely dissociate in water, and instead exist in solution as an equilibrium of dissociated and undissociated species. When a small quantity of a strong acid is added to a buffer solution, the conjugate base, A-, reacts with the hydrogen ions from the added acid to form the weak acid and a salt thereby removing the extra hydrogen ions from the solution and keeping the pH of the solution fairly constant. On the other hand, if a small quantity of a strong base is added to the buffer solution, the weak acid dissociates further to release hydrogen ions which then react with the hydroxide ions of the added base to form water and the conjugate base.

For example, if a small amount of strong acid is added to a buffer solution that is 0.700 M H3PO4 and 0.700 M KH2PO4, the following reaction is obtained:

KH₂PO₄ + H+ ----> K+ + H₃PO₄

Therefore, [H₃PO₄] will increase, [KH₂PO₄] will decrease, and pH will slightly decrease.:

4 0
3 years ago
What is Gibbs free energy
Alenkinab [10]

Answer:

The minimum amount of energy needed the the cell to perform various cellular,biochemical and physiological activities is known is Gibbs free energy.

Explanation:

The change in gibbs free energy of is very much important to determine whether a given reaction is spontaneous,non spontaneous  or equilibrium.

 1 If gibbs free energy change of a reaction is negative then the reaction is spontaneous.

2  If the free energy change is 0 then the reaction is in equilibrium stage.

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3 years ago
Please help me I will do anything can you please show your work
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Answer:

(1) 720 seconds (2) 10800 seconds (3) 17 dozens (4) 1.45 x 10^{25} (5) 13.29 moles

Explanation:

(1) 720 seconds

1 minute = 60 seconds

12 minutes = 720 seconds   (12 x 60)

(2) 10800 seconds

1 hour = 60 minutes  1 minute = 60 seconds

3 x 60 = 180 minutes in 3 hours

180 x 60 = 10800 seconds in 180 minutes that are in 3 hours

(3) 17 dozens

1 dozen = 12

204 ÷ 12 = 17 dozens  

(4) 1.45 x 10^{25}

8.00 moles CO2 x \frac{3 moles atoms}{1 moles CO2} = 24.0 moles atoms

24.0 moles x \frac{6.022 × 10^{23}  }{1 mole} } = 1.45 x 10^{25}

(5) 13.29 moles

sorry but I'm not fully sure if this one is correct

8 x 10^{24} x \frac{1 mole}{6.02 × 10^{23} } = 13.29 moles

7 0
2 years ago
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tiny-mole [99]

Answer: A.

Explanation:

Gravitational potential energy is due to the position of an object above Earth's surface. The object has the potential to fall due to gravity. Gravitational potential energy depends on an object's weight and its height above the ground (GPE = weight x height).

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Hope this helps!

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The following table lists the number of protons, neutrons, and electrons in several different atoms. Which two
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Answer: The correct answer to this question is B because thats

what it states and says

Explanation:

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