A 75 watt incandescent light bulb and an 18 watt compact fluorescent bulb are equally bright. How much warmer will an insulated closed 12 by 11 by 8.0 foot room get in 1.0 hour if it is lighted by an incandescent bulb than if it is lighted by a fluorescent bulb? At room temperature, the specific heat of air is 1.007 J/gC and its density is 1.2 g/L. The watt is the SI unit of power; 1 watt = 1 J/s.

1) A bottling plant has 1.26521×10⁵ bottles with a capacity of 355 mL , 1.08937×10⁵ caps, and 4.8740×10⁴ L of beverage.

-How many bottles can be filled and capped, how many bottles left over, how much beverage left over, how many caps left over?

2) Hydrogen gas reacts with nitrogen gas to produce ammonia

3H2(g)+N2(g)→2NH3(g)

-What is the theoretical yield in grams and percent yield for this reaction?

3) Methane (CH4 ) burns and reacts with oxygen gas to produce carbon dioxide and water

CH4(g)+2O2(g)→CO2(g)+2H2O(g)

-What is the mass of carbon dioxide, water, and oxygen from this complete combustion of 1.40*10^-3 g of methane?

Reviewing for test using online appliction, application keeps rejecting answers, some of these concepts I thought I understood well I am struggling with these problems, first one seems simple but I am missing something big thank you in advance.

thanks

Fe+3 + SCN-
---->
<----
FeSCN+2
You mix the following:
Volume of KSCN solution 4.27 mL
Original concentration of KSCN solution 0.00495 M
Volume of ferric ion solution 4.74 mL
Original concentration of ferric ion solution 0.02488 M
Voluume of distilled water 5.25 mL
You measure the %T of the blank and sample at 447 nm using the same cuvet. Only FeSCN2+ absorbs at 446 nm! KSCN and Fe+3 are transparent.
%T of blank 100.6
%T of sample 42.7
constant [Molarity FeSCN2+ per absorbance] 0.001264 M/A
Note: This constant is only for this pre-lab
Calculate:
a) Millimoles of SCN- originally put in solution _______________ mmoles
b) Millimoles of Fe+3 originally put in solution _______________ mmoles
c) Total volume of solution _______________ mL
d) Molarity of FeSCN2+ at equilibrium _______________ M
e) Millimoles of FeSCN2+ at equilibrium _______________ mmoles
f) Molarity of SCN- at equilibrium _______________ M
g) Molarity of Fe+3 at equilibrium _______________ M
h) Calculated equilibrium constant _______________

Nickel metal reacts with sulfuric acid in a redox reaction. In an experiment, 1.25g of nickel reacted with 55.0ml od 0.110M sulfuric acid. Hydrogen gas was collected in a 150.0ml container. The reaction takes place at 20 degrees C. One product of the reaction contained nickel (IV) ion.

a. When the reaction is complete, what will be the pressure of the gas in the container?

b. How many grams of the excess reactant will remain?

2. Which of the following statements is true (explain why)?
a. A sample of oxygen gas at 273K will have a higher urms than a sample of oxygen at 1000K
b. A sample of hydrogen gas at 273K will have more molecules that are able to achieve a a speed of 2000m/s than a sample of oxygen gas at 1000K (number of moles remaining constant)
c. A sample of hydrogen gas at 273K will have a higher urms than a sample of the same gas at 1000K
d. None of these statements are true
e. All of these statements are true

3. Which of the following statements regarding energy entering a system is false (explain why)?
a. Energy cannot enter or leave a system from the surroundings in the case of an isolated system
b. Both heat (q) and work (w) would require a positive sign
c. Heat (q) would require a negative sign, while work (w) would require a positive sign
d. All of these statements are true
e. All of these statements are false

4. Recall that the internal energy of a system is a state function and depends only on temperature. In the isothermal expansion of an ideal gas, which of the following statements are true (explain why)?
a. The gas absorbs energy from its surroundings
b. The gas does work
c. The change in internal energy remains constant
d. Only a and b are true
e. All of these statements are true

5. The electron configuration for Ge is [Ar] (3d^10)(4s^2)(4p^2) What is the maximum number of electrons that can have an ml value equal to 0 (show the calculations)?

a. 8

b. 15

c. 16

d. 32

Half-reaction E° (V) Br2(l) + 2e- 2Br-(aq) 1.080V

Sn2+(aq) + 2e- Sn(s) -0.140V

Al3+(aq) + 3e- Al(s) -1.660V

(1) The weakest oxidizing agent is: enter formula (2) The strongest reducing agent is: (3) The strongest oxidizing agent is: (4) The weakest reducing agent is: (5) Will Al(s) reduce Br2(l) to Br-(aq)? (6) Which species can be oxidized by Sn2+(aq)? If none, leave box blank.

20 microliters of 1% H2O2 (weight by volume) was added to 2980 microliters of water to make 3000 microliters of solution.

(a) What is the concentration of H2O2 for this scenario?

(b) What is the concentration of H2O2 if 60 microliters of 1% H2O2 was added to 2940 microliters water?

(c) What is the concentration of H2O2 if 100 microliters of 1% H2O2 was added to 2900 microliters water?

Please show your work so I can replicate them in other similar situations, thank you.

Decide which of the following statements are true and which are false.

1. Real gas molecules behave most ideally at high temperature and low pressure.

2. At constant temperature, the heavier the gas molecules, the larger the average velocity.

3. Ideal gas molecules have small volumes and exert weak attractive forces on one another.

4. In order for two separate 1.0 L samples of O2(g) and H2(g) to have the same average velocity, the O2(g) sample must be at a lower temperature than the H2(g) sample.

5. As temperature increases, the average kinetic energy of a sample of gas molecules decreases.

6. At constant temperature, the heavier the gas molecules, the smaller the average kinetic energy.

Propranolol is an adrenergic antagonist. Compare the structure of propranolol with noradrenaline and identify which features are similar in both molecules. Suggest why this molecule might act as an antagonist rather than an agonist.

Calculate the [H3O+] of each aqueous solution with the following [OH-]. 1) NaOH, 1.6x10^2 M. 2) milk of magnesia, 1.0x10^-5 M. 3) aspirin, 2.2x10^-11 M. 4) seawater, 2.5x10^-6 M.

1. (I)- Calculate pH and pOH to 2 decimal places for the following:

a) 1.43×10^-1 M CaH₂

b) 8.77×10^-3 M KH

(II)- Determin pH&pOH to two decimal places for a solution that is produced by:

c) by mixing 883 mL of 6.18×10^-5 M KH with 251 mL of 4.86×10^-5 M KOH.

D) by mixing 79.4 mL of 5.66×10^-3 M HNO₃ with 5.87 mL of 2.11×10^-2 M Ca(OH)₂.

A compound has a pKa of 7.4. To 1 L of a 0.1 M solution of this compound at pH 8.0 is added 10 mL of 3.0 M hydrochloric acid. What is the pH of the resulting solution?

How much energy (in kJ) is required to convert a 2.56 lb block of ice at -12.5oF to steam at 234oF? Use the space provided on this page to draw a complete heating curve, labeling the axes and each important point on the graph. Below the graph, show your calculations and the final answer.