Answer:

**Answer:**

Bond length of C=C is largest(134 pm) because both the carbon atoms have same electronegativity. In case of C=O. and C=N carbon is bonded to highly electronegative atoms so bond length is shoreter as compared to C=C

If the molecule C6H12 does not contain a double bond, and there are no branches in it, what will its structure look like?

How much heat is required to change the temperature of two cups of water (500 g) from room temperature (25◦C) to boiling? Specific heat of water is c=4.184 J/(g oC) a 78.5 kJ b 15.7 kJ c 157 kJ d 1.57 kJ

Sulfur and oxygen form both sulfur dioxide and sulfur trioxide. When samples of these were decomposed the sulfur dioxide produced 3.49g oxygen and 3.50g sulfur, while the sulfur trioxide produced 9.00g oxygen and 6.00g sulfur.A) Calculate the mass of oxygen per gram of sulfur for sulfur dioxide.B) Calculate the mass of oxygen per gram of sulfur for sulfur trioxide.

Which of the following statements is true with regard to transverse and longitudinal waves?Group of answer choices Both transverse waves and longitudinal waves have motion parallel to velocity. Both transverse waves and longitudinal waves have motion perpendicular to velocity. Transverse waves have motion parallel to velocity, while longitudinal waves have motion perpendicular to velocity. Transverse waves have motion perpendicular to velocity, while longitudinal waves have motion parallel to velocity.

What is the mass of silver that can be prepared from 1.50 g of copper metal? Cu(s)+2AgNO3(aq)→Cu(NO3)2(aq)+2Ag(s)

How much heat is required to change the temperature of two cups of water (500 g) from room temperature (25◦C) to boiling? Specific heat of water is c=4.184 J/(g oC) a 78.5 kJ b 15.7 kJ c 157 kJ d 1.57 kJ

Sulfur and oxygen form both sulfur dioxide and sulfur trioxide. When samples of these were decomposed the sulfur dioxide produced 3.49g oxygen and 3.50g sulfur, while the sulfur trioxide produced 9.00g oxygen and 6.00g sulfur.A) Calculate the mass of oxygen per gram of sulfur for sulfur dioxide.B) Calculate the mass of oxygen per gram of sulfur for sulfur trioxide.

Which of the following statements is true with regard to transverse and longitudinal waves?Group of answer choices Both transverse waves and longitudinal waves have motion parallel to velocity. Both transverse waves and longitudinal waves have motion perpendicular to velocity. Transverse waves have motion parallel to velocity, while longitudinal waves have motion perpendicular to velocity. Transverse waves have motion perpendicular to velocity, while longitudinal waves have motion parallel to velocity.

What is the mass of silver that can be prepared from 1.50 g of copper metal? Cu(s)+2AgNO3(aq)→Cu(NO3)2(aq)+2Ag(s)

**Answer:**

To 318.18 mL would you need to dilute 20.0 mL of a 1.40 M solution of LiCN to make a 0.0880 M solution of LiCN

**Explanation:**

Dilution is the reduction of the concentration of a chemical in a solution and consists simply of adding more solvent.

In a dilution the amount of solute does not vary. But as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

In a solution it is fulfilled:

Ci* Vi = Cf* Vf

where:

- Ci: initial concentration
- Vi: initial volume
- Cf: final concentration
- Vf: final volume

In this case:

- Ci= 1.40 M
- Vi= 20 mL
- Cf= 0.088 M
- Vf= ?

Replacing:

1.40 M* 20 mL= 0.088 M* Vf

Solving:

Vf= 318.18 mL

**To 318.18 mL would you need to dilute 20.0 mL of a 1.40 M solution of LiCN to make a 0.0880 M solution of LiCN**

To make a 0.0880 M solution of LiCN, you would need to dilute 20.0 mL of the 1.40 M solution to a final volume of 318.18 mL.

To **dilute a solution,** you can use the formula:

M1V1 = M2V2

where M1 and V1 are the** initial molarity **and volume, and M2 and V2 are the final molarity and volume. Rearranging the formula, we can solve for V2:

V2 = (M1 · V1) / M2

Plugging in the values given:

V2 = (1.40 M · 20.0 mL) / 0.0880 M = 318.18 mL

To make a 0.0880 M solution of LiCN, you would need to dilute 20.0 mL of the 1.40 M solution to a final volume of 318.18 mL.

#SPJ3

**Answer:**

**1) 0.18106 M is the molarity of the resulting solution.**

**2) 0.823 Molar is the molarity of the solution.**

**Explanation:**

**1)** Volume of stock solution =

Concentration of stock solution =

Volume of stock solution after dilution =

Concentration of stock solution after dilution =

( dilution )

**0.18106 M is the molarity of the resulting solution.**

**2)**

Molarity of the solution is the moles of compound in 1 Liter solutions.

Mass of potassium permanganate = 13.0 g

Molar mass of potassium permangante = 158 g/mol

Volume of the solution = 100.00 mL = 0.100 L ( 1 mL=0.001 L)

**0.823 Molar is the molarity of the solution.**

To determine the molarity of the resulting solution, we can use the formula M1V1 = M2V2. Plugging in the given values, we find that the molarity of the resulting solution is 0.180 MM.

To determine the** molarity** of the resulting solution, we need to use the formula:

M1V1 = M2V2

Where M1 is the molarity of the stock solution, V1 is the volume of the stock solution used, M2 is the molarity of the resulting solution, and V2 is the final volume of the resulting solution.

Using the given values, we have:

M1 = 0.823 MM

V1 = 11.00 mL

V2 = 50.00 mL

Substituting these** values** into the formula, we can find the molarity of the resulting solution.

M2 = (M1 * V1) / V2

Plugging in the values:

M2 = (0.823 MM * 11.00 mL) / 50.00 mL = 0.180 MM

The molarity of the resulting solution is 0.180 MM.

#SPJ3

**Answer:**

A. Equator

**Explanation:**

The equator is located in the centre of the Earth, dividing the northern and southern hemispheres.

**Answer:**

Equator because equator divides the earth into Northern and Southern hemisphere.

a. Irreversible

b. Reversible

Answer: b

A change of state is a reversible process.

B that’s the answer

Good luck

Good luck

___2.Variables

___3.Conclusion

___4.Scientific Method

___5.Procedure

a.The steps you take to complete the experiment

b.Factors that changes in an experiment

c.A possible solution to a problem

d.The result of the experiment

e.The process scientist follow to complete an investigation

Hypothesis - A possible solution to a problem

Variables - Factors that changes in an experiment

Conclusion - The result of the experiment

Scientific Method - The process scientists follow to complete an investigation

Procedure - The steps you take to complete the experiment

Variables - Factors that changes in an experiment

Conclusion - The result of the experiment

Scientific Method - The process scientists follow to complete an investigation

Procedure - The steps you take to complete the experiment

**Answer:**

1. d

2. b

3. d

4. e

5. a

explanation:

there's nothing else to explain

**Pb(NO₃)₂ ⇒limiting reactant**

**moles PbI₂ = 1.36 x 10⁻³**

**% yield = 87.72%**

**Given**

Reaction(unbalanced)

Pb(NO₃)₂(s) + NaI(aq) → PbI₂(s) + NaNO₃(aq)

**Required**

- moles of PbI₂
- Limiting reactant
- % yield

**Solution**

Balanced equation :

Pb(NO₃)₂(s) + 2NaI(aq) → PbI₂(s) + 2NaNO₃(aq)

mol Pb(NO₃)₂ :

= 0.45 : 331 g/mol

= 1.36 x 10⁻³

mol NaI :

= 250 ml x 0.25 M

= 0.0625

Limiting reactant (mol : coefficient)

Pb(NO₃)₂ : 1.36 x 10⁻³ : 1 = 1.36 x 10⁻³

NaI : 0.0625 : 2 = 0.03125

**Pb(NO₃)₂ ⇒limiting reactant(smaller ratio)**

moles PbI₂ = moles Pb(NO₃)₂ =** 1.36 x 10⁻³**(mol ratio 1 : 1)

Mass of PbI₂ :

= mol x MW

= 1.36 x 10⁻³ x 461,01 g/mol

= 0.627 g

% yield = 0.55/0.627 x 100% = **87.72%**