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PtichkaEL [24]
4 years ago
11

20 points!! Please help me! Will mark Brainliest!! complete the following word equations:) also write the balanced equation, ful

l ionic equation, and net ionic equation. Also include the states:)
a) zinc nitrate + calcium sulphide—>

b) potassium + calcium chloride—>
Chemistry
1 answer:
vazorg [7]4 years ago
4 0

Answer:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The total ionic equations shows the equation in which all the species of the reactants and the products are in dissociated form and are represented as ions.

The net ionic equations shows the equation in which all the species of the reactants and the products are in dissociated form and do not show the spectator ions which are same in the reactants and the products.

a) zinc nitrate + calcium sulphide \rightarrow zinc sulphide + calcium nitrate

balance equation : Zn(NO_3)_2(aq)+CaS(aq)\rightarrow ZnS(s)+Ca(NO_3)_2(aq)

total ionic equation :

Zn^{2+}(aq)+2NO_3^-(aq)+Ca^{2+}(aq)+S^{2-}(aq)\rightarrow ZnS(s)+Ca^{2+}(aq)+2NO_3^-(aq)

net ionic equation :

Zn^{2+}(aq)++S^{2-}(aq)\rightarrow ZnS(s)

b) potassium + calcium chloride  \rightarrow potassium chloride + calcium

balance equation : 2K(s)+CaCl_2(aq)\rightarrow 2KCl(aq)+Ca(s)

total ionic equation :

2K(s)+Ca^{2+}(aq)+2Cl^-(aq)\rightarrow 2K^+(aq)+2Cl^-(aq)+Ca

net ionic equation: 2K(s)+Ca^{2+}(aq)+\rightarrow 2K^+(aq)++Ca

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What is a radio wave?
geniusboy [140]

Answer:

Radio waves are a type of electromagnetic radiation best-known for their use in communication technologies, such as television, mobile phones and radios.

5 0
3 years ago
Which statement below correctly describes the relationship between Q and K for both reactions? Are these reactions spontaneous a
nikklg [1K]

Answer:

Q < K for both reactions. Both are spontaneous at those concentrations of substrate and product.

Explanation:

Hello,

In this case, the undergoing chemical reactions with their proper Gibbs free energy of reaction are:

A->B;\Delta _rG^o=-13 kJ/mol

C ->D ;\Delta _rG^o=3.5 kJ/mol

The cellular concentrations are as follows: [A] = 0.050 mM, [B] = 4.0 mM, [C] = 0.060 mM and [D] = 0.010 mM.

For each case, the reaction quotient is:

Q_1=\frac{4.0mM}{0.050mM}=80\\ Q_2=\frac{0.010mM}{0.060mM}=0.167

A typical temperature at a cell is about 30°C, in such a way, the equilibrium constants are:

K_1=exp(-\frac{-13000J/mol}{8.314J/mol*K*303.15K} )=173.8\\K_2=exp(-\frac{3500J/mol}{8.314J/mol*K*303.15K} )=0.249

Therefore, Q < K for both reactions. Both are spontaneous at those concentrations of substrate and product.

Best regards.

6 0
3 years ago
A. If both Assertion &amp; Reason are true and the reason is the correct explanation of the assertion. B. If both Assertion &amp
Fofino [41]

Answer:

D- Assertion is false and Reason is true

Explanation:

Precipitation is said to have occurred when an insoluble product is formed from soluble ones. Let us take an instance;

BaCl2(aq) + H2SO4(aq) -------> BaSO4(s) + 2HCl(aq)

The barium sulphate so formed is an insoluble product obtained from the reaction of soluble barium chloride and sulphuric acid. This is a typical example of a double replacement reaction as the both ions exchanged partners.

Thus, the assertion is false but the reason is true.

8 0
3 years ago
What volume (l) of 0.750 m kcl solution contains 25.0 g of kcl?
Effectus [21]
Conc = moles / Vol you have C but need to find moles 
moles KCl = mass / molar mass 
25 g / 74.55 g,p; 
0.335 moles 
So rearrange the formula to find volume. Vol = moles / Conc 
0.335 moles / 0.750 mol / L = 0.447 L or 447 mL

The answer in this question is 447 mL.
5 0
3 years ago
Read 2 more answers
HELPPPPPPPPPPPP
erica [24]

Answer:

Pressure inside soda can = 5.56 atm

Explanation:

Given data:

Initial volume = 1250 mL

Initial pressure = 1.00 atm

Final volume = 225  mL

Final pressure = ?

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

1.00 atm × 1250m L =  P₂ × 225 mL

P₂ =  1250 atm. mL/ 225 mL

P₂ = 5.56 atm

8 0
3 years ago
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