viks511

Identify the C-C bond forming reactions that should be considered while proposing a synthesis.

OF2 (g) + H2O (g) --> O2 (g) + 2HF (g) DH=-318 kj
Bond: O-O=148 kj/mol; O-H=467 kj/mol; O=O=498 kj/mol; H-F=565kj/mol
My work:
[(2 * 498)+(2*565)]-[2x+(2*467)]

2126-2x-934

= 1192-2x = -318
-2x= -1510

x= 755

This is not correct, however. :/

Directions: Predict the shapes of the following molecules and ions.

1. CCl4 -

2. ClO2 -

3. XeF2 -

4. XeOF4 -

5. HCN - 

6. ClO3 -

7. XeO4 -

8. OF2 - 

9. CO32 -

10. NH3 - 

1. Last month a manufacturing company's profit was GHS2,000, calculated using absorption costing principles. If marginal costing principles have been used, a loss of GHS3,000 would have occurred. The company's fixed production cost is GHS2 per unit. Sales last month were 10,000 units. What was last month's production (in units)?

A. 7,500

B. 9,500

C. 10,500

D. 12,500

Show work!!!!!?

How to print a hanoi tower using python?

Classify each of the following as an element, compound, homogeneous mixture, or heterogeneous mixture:

a) copper wire
b) copper ore
c) copper oxide
d) brass alloy

Classify each of the following as an element, compound, homogeneous mixture, or heterogeneous mixture:

a) silver ingot
b) silver ore
c) silver oxide
d) silver alloy

Write the chemical symbol for each of the following elements:

a) strontium
b) xenon
c) oxygen
d) zinc
e) fluorine
f) sodium
g) copper
h) nickel

What is the formula of (A+B)²

1. Anybody please help me

Directions: Follow the instructions in Parts A, B, C, and D below to complete the assignment.

Part A

Boyle’s Law

Directions: Solve the following problems using Boyle’s gas law:

1. If I have 5.6 liters of gas in a piston at a pressure of 1.5 atm and compress the gas until its volume is 4.8 L, what will the new pressure inside the piston be?

2. I have added 15 L of air to a balloon at sea level (1.0 atm). If I take the balloon with me to Denver, where the air pressure is 0.85 atm, what will the new volume of the balloon be?

3. I’ve got a car with an internal volume of 12,000 L. If I drive my car into the river and it implodes, what will be the volume of the gas when the pressure goes from 1.0 atm to 1.4 atm?

Directions: Solve the following problems using Charles’s gas law:

4. If I have 45 liters of helium in a balloon at 250 C and increase the temperature of the balloon to 550 C, what will the new volume of the balloon be?

5. Calcium carbonate decomposes at 12000 C to form carbon dioxide and calcium oxide. If 25 liters of carbon dioxide are collected at 12000 C, what will the volume of this gas be after it cools to 250 C?

6. I have 130 liters of gas in a piston at a temperature of 2500 C. If I cool the gas until the volume decreases to 85 liters, what will the temperature of the gas be?

Directions: Solve the following problems using the Combined gas law:

7. If I initially have 4.0 L of a gas at a pressure of 1.1 atm, what will the volume be if I increase the pressure to 3.4 atm?

8. A small research submarine with a volume of 1.2 x 105 L has an internal pressure of 1.0 atm and an internal temperature of 150 C. If the submarine descends to a depth where the pressure is 150 atm and the temperature is 30 C, what will the volume of the gas inside be if the hull of the submarine breaks?

9. People who are angry sometimes say that they feel as if they’ll explode. If a calm person with a lung capacity of 3.5 liters and a body temperature of 360 C gets angry, what will the volume of the person’s lungs be if their temperature rises to 390 C. Based on this, do you think it’s likely they will explode?

Directions: Solve the following problems using the Ideal gas law:

11. How many moles of gas are in a 30-liter scuba canister if the temperature of the canister is 300 K and the pressure is 200 atmospheres?

12. I have a balloon that can hold 100 liters of air. If I blow up this balloon with 3 moles of oxygen gas at a pressure of 1 atmosphere, what is the temperature of the balloon?