whiteclam74

Boyle’s law states that the volume of a gas is inversely proportional to the pressure if the temperature is held constant.

A gas has a volume of 784.4 mL when the pressure is 1.91 atm. What is the volume (in mL), to one decimal place, if the temperature remains constant and the pressure is increased to 4.86 atm?

Need help *Please refer to the attached file*

! “Write balanced equation for the complete combustion of each of the following substances (use the lowest possible coefficient. Include states of matter under SATP conditions in your answer)

 (a)  

 (b)    

 (c)

1.14 mol sample of argon gas at a temperature of 12.0 °C is found to occupy a volume of 30.0 liters. The pressure of this gas sample is ______ mm Hg.

A sample of krypton gas collected at a pressure of 385 mm Hg and a temperature of 284 K has a mass of 94.7 grams. The volume of the sample is _____L.

A 0.238 gram sample of hydrogen gas has a volume of 973 milliliters at a pressure of 2.06 atm. The temperature of theH₂ gas sample is _____°C

0.545 mole of krypton gas at temperature of 26 0C is found to occupie volume of 27.8 liter. Calculate the pressure of gas in mmHg.

Simplifying rational expressions.

What are the excluded values?

⭕ x = -3; z = 0

⭕ y= -5; z = 0

⭕ y= 0; z = -5

⭕ none of the above

How many grams of sodium bicarbonate (w/v)is needed to mixed with 500ml of water  to make a 15% solution.specific gravity of water is 1 .

Which of the following functions is linear?

⚪  

⚪  

⚪  

⚪  

The average of three 2-digit odd numbers is 39. One of the numbers is 65. What is the largest difference between the other two numbers?

What is the mass in grams of 300 mmol of MgO?

Why Titanium (22) and Thallium (81) elements symbol are same? 

The rate is equal to 0.0100 M/s. If [A] = 0.200 M and rate = k[A]2[B], what is the new rate if the concentration of [A] is increased to 0.400 M?

 A 30.00 L air sample was passed through an absorption tower contained a solution of 
Cd2+
, where H2S was retained as CdS. The mixture was acidified and treated with 10.00 
mL of 0.01070 M I2. After the reaction, 
S
2- + I2 S(s) + 2I- was complete, the excess iodine was titrated with 12.85 mL of 0.01344 M thiosulphate. 
Calculate the concentration of H2S in ppm; use 1.20 g/L for the density of gas stream.

Balance the following: 

(b)   

Anna bought soil that contains 12% of water. She wants to plant a flower that needs 18% of water. How much water does she need to pour in 2kg of soil to plant that flower?

Calculate the amount of manganese (54.94 g/mol) from a processed ore using the following data.

Standardization data: 

2.000 mL KMnO4 = 0.02015 g Na2C2O4 (134 g/mol) 

Sample analysis data: 

Weight of sample = 0.1012 g 

Na2C2O4 used(in excess)= 0.3200 g 

KMnO4 used for back-titration = 9.93 mL 

Rxn: 2MnO4^- + 5C2O42^- + 16H^+ → 2Mn2^+ + 10CO2 + 8H2O

Owen and Kenji are monkeys at a zoo. Owen weighs 5/6 as much as Kenji. If Owen weighs 90 pounds how much does Kenji weigh?

Ozone (OR) in the atmosphere can react with nitric oxide (NO) 

O2(g)+NO(g)- NO2(g)+O2(g)

Calculate the G for this reaction at 25C

(H=-199kJ/mol, S=-4.1 J/K.mol)

A certain wood stove has a firebox volume of 0.12 m^3. What firebox volume would be expected if all the dimensions of the stove were increased by a factor of 2.25? aver your answer to 2 decimal place.