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3 years ago

What is the balanced chemical equation when an aqueous solution of calcium hydroxide reacts with liquid water?

Chemistry

1 answer:

Dmitrij [34]3 years ago

7 0

Explanation:

Equation for Calcium Hydroxide Dissolving in Water | Ca(OH)2 + H2O

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1.) How do plant scientists hope to improve plant processes?

NISA [10]

Question:

1.) How do plant scientists hope to improve plant processes?

Answer:

January 2, 2012. Plant scientists long have known they can alter crops genetically to improve performance; they've been doing it thousands of years.

Question:

2.) How could you find out which resources are the most important for a plant to grow?

Answer:

Three elements, carbon, oxygen and hydrogen, are essential to plant growth and are supplied by air and water.

Hope it helps (^^)

# Cary on learning

6 0

3 years ago

Read 2 more answers

(b) Which peak, the one at 365 nm or the one at 435 nm, results from the absorption of

GenaCL600 [577]

Answer:

365nm and Exothermic reaction

Explanation:

b) The Einstein Planck's equation states that

E = hf where E is the energy of a photon

h is the Planck's constant

f is the frequency

But Frequency f = c/λ where c is the speed of light

λ is the wavelength

Therefore Energy E = hc/λ

From the above equation we see that the Energy of a photon is indirectly proportional to its wavelength

Hence as the wavelength increases from 365nm to 435nm, the energy of the photons decreases

Therefore, a photon will wavelength 365nm would have a higher energy than one will wavelength of 435nm.

c) From the diagram we observe the following:

At high temperatures, HPR⁺ occurs at a higher concentration than at low temperatures.

At low temperatures, more of PR⁻ is formed than at high temperatures

The equation of the reaction is

HPR⁺ (aq) ⁺ ⇆ H⁺ + PR⁻(aq)

Le Chartelier's principle states that when an external constraint such as a change in concentration, pressure or temperature is placed on a system in equilibrium, the system acts in such a way as to oppose the change.

Hence a decrease in temperature on the side of reactant, HPR would force the equilibrium to the side of the products, PR in other to accommodate the change

The forward reaction, which produces more of the product PR⁻ is exothermic because the at low temperatures, the the forward reaction is favoured and equilibrium shifts to the right.

5 0

3 years ago

Identify the class of the 8 organic compound below (alcohol, carboxylic acid, halocarbon, alcohol, ketone, ester, ether). Some w

Darina [25.2K]

Answer:

See below ~

Explanation:

1) Ketone

2) Carboxylic Acid

3) Ketone

4) Ether

5) Alcohol

6) Halocarbon

7) Ester

8) Ketone

4 0

2 years ago

Please help me with b and c.

Zanzabum

Answer:

c.sf4 b.2

Explanation:

7 0

3 years ago

Select the properly written and balanced equation for the following chemical reaction: Sodium metal and an aqueous solution of m

Setler [38]

Answer: $2Na(s)+MgI_2 (aq)\rightarrow 2NaI(aq)+Mg(s)$

Explanation: The chemical reaction is written by writing down the chemical formulas of the reactants on the left hand side and the chemical formulas of products on the right hand side separated by a right arrow.

This is a single displacement reaction in which a more reactive element displaces the less reactive element from its salt solution. Thus sodium is more reactive than Mg and thus displaces it from $MgI_2$ .

$2Na(s)+MgI_2 (aq)\rightarrow 2NaI(aq)+Mg(s)$

The number of atoms of each element must be same on both sides of the reaction so as to follow the law of conservation of mass. Thus the equation is balanced.

5 0

3 years ago