Which of the samples pictured is most likely a nonmetal?

Write the equilibrium constant expression for the following reaction in terms of concentrations of the components. (Concentratio

timofeeve [1]

<u>Answer:</u> The expression for equilibrium constant in terms of concentration is $K_c=[CO_2]$

<u>Explanation:</u>

Equilibrium constant in terms of concentration is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric coefficients. It is represented by $K_{c}$

For a general chemical reaction:

$aA+bB\rightarrow cC+dD$

The $K_{c}$ is written as:

$K_{c}=\frac{[C]^c[D]^d}{[A]^a[B]^b}$

The concentration of pure solids and pure liquids are taken as 1.

For the given chemical reaction:

$MgCO_3(s)\rightarrow MgO(s)+CO_2(g)$

The expression for $K_{c}$ is:

$K_{c}=\frac{[MgO][CO_2]}{[MgCO_3]}$

In the above expression, magnesium oxide and magnesium carbonate will not appear because they are present in solid state.

So, the expression for $K_c$ becomes:

$K_{c}=[CO_2]$

Hence, the equilibrium constant for the reaction is given above.

4 0

3 years ago

True or False: Salt will freeze with water molecules.

uysha [10]

Answer:

True

Explanation:

Salt is used to keep ice from forming but it only helps with certain tempuratures is still able to freeze

8 0

3 years ago

Read 2 more answers

How many total atoms are there in calcium hydroxide?

AleksAgata [21]

Answer:

5 atoms

Explanation:

1 calcium, 2 oxygen and 2 hydrogen makes for a total of 5 atoms in 1 molecule.

7 0

3 years ago

Read 2 more answers

Give the chemical symbol for the element with the ground‑state electron configuration [ Ar ] 4 s 2 3 d 1 . symbol: Determine the

Rus_ich [418]

Answer:

Sc (Scandium) has the given electronic configuration.

Explanation:

The given electronic configuration is [Ar] $4s^{2}3d^{1}$ .

The last electron enters the d-subshell and hence is a d-block element known as Scandium with chemical symbol Sc.

For 4s subshell

n=4,l=0 and m ranges from -l to +l so m=0.

For 3d subshell

n=3,l=2 and m ranges from -l to +l so m can take values -2,-1,0,+1,+2

Note:

l values for subshells:

s : 0

p : 1

d : 2

f : 3 and so on.

5 0

3 years ago

A musician hits a drum with a drumstick. In three to four sentences, explain the collision forces between the drum and drumstick

Likurg_2 [28]

Answer:

When the drumstick hits the drum, there is a force acting on both objects. The force are equal in magnitude and opposite in direction. So, when collision happens, both object receives the force and pushes each other away.

Explanation:

Hope this helps :)

5 0

2 years ago