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3 years ago

An atom of Ni has 26 electrons. What is the charge of this atom?

Chemistry

1 answer:

mina [271]3 years ago

8 0

Answer:

Explanation:

Nickel has an atomic number of 28 meaning that it contains 28 protons in its nucleus. It would need 28 electrons in order to have no charge, because the positive and negative charges balance each other out. Since this atom of Ni has 26 electrons, it has lost 2 of its electrons, and therefore has a positive charge of 2.

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What is/are the product(s) of a neutralization reaction of a carboxylic acid?

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RCOOH + NaOH → RCOONa + H₂O (salt and water)

RCOOH + OH⁻ → RCOO⁻ + H₂O

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How many multiple bonds in ch4

chubhunter [2.5K]

It has 8 bonding electrons

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3 years ago

A student left a sealed jar of water outside her home. Water can be a solid, liquid, or gas. When she put it outside, the water

GenaCL600 [577]

The water molecules received enough energy through the heat for them to change to a liquid state by unfixing themselves from their fixed positions.

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3 years ago

Read 2 more answers

A mixture of 9.22 moles of A, 10.11 moles of B, and 27.83 moles of C is placed in a one-liter

AysviL [449]

The equilibrium constant is 1.3 considering the reaction as written in the question.

<h3>Equilibrium in chemical reactions</h3>

In a chemical reaction, the equilibrium constant is calculated based on the equilibrium concentration of each specie. The equation of this reaction is;

A (g) + 2B (g) ⇌ 3C (g).

The initial concentration of each specie is;

A - 9.22 M
B - 10.11 M
C - 27.83 M

The equilibrium concentration of B is 18.32 M

We now have to set up the ICE table as follows;

A (g) + 2B (g) ⇌ 3C (g)

I 9.22 10.11 27.83

C -x -x +x

E 9.22 - x 10.11 - x 27.83 + x

The equilibrium concentration of B is 18.32 M hence;

10.11 - x = 18.32

x = 10.11 - 18.32 = -8.21

Hence;

Equilibrium concentration of A = 9.22 - (-8.21) = 17.43

Equilibrium concentration of C = 27.83 + (-8.21) = 19.62

Equilibrium constant K = [19.62]^3/[17.43] [18.32]^2

K = 1.3

Learn more about equilibrium constant: brainly.com/question/17960050

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3 years ago

The heat required to raise the temperature of 12g of water from 16 C to 21 C is:

NemiM [27]

Answer:

The heat required to raise the temperature of 12g of water from 16 C to 21 C is 60 cal.

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

There is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Q=?
c= 4.186 $\frac{J}{g*C}$
m= 12 g
ΔT=Tfinal - Tinitial= 21 °C - 16°C= 5 °C

Replacing:

Q= 4.186 $\frac{J}{g*C}$ *12 g *5 °C

Solving:

Q=251.16 J

Since 1 J is equal to 0.2388 cal, then the following rule of three can be applied: if 1 J is equal to 0.2388 cal, then 251.16 J to how many cal are?

$cal=\frac{251.16 J * 0.2388 cal}{1 J}$

cal= 59.98 ≅ 60

<u><em>The heat required to raise the temperature of 12g of water from 16 C to 21 C is 60 cal.</em></u>

3 0

3 years ago