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Physical Chemistry
PLEASE HELP WITH THESE 4 QUESTIONS I CAN FIGURE OUT ON MY CHEM HOMEWORK! THANKS!
1) Compute 21405.6 + 9.3456 . Round the answer appropriately.
Express your answer numerically using the proper number of significant figures
2) A graduated cylinder contains 155 of water. A 17.0 piece of iron (density = 7.86 ) and a 24.0 piece of lead are added. What is the new water level in the cylinder?
3) An object has a mass of 3.45 and a volume of 0.1107 . What is the density () of the object?
4)
The specific gravity of iron is 7.87, and the density of water at 4.00 is 1.00 . You can use this information to find the density of iron. Find the volume occupied by 8.00 of iron.
Express your answer to three significant figures and include the appropriate units.
1) Compute 21405.6 + 9.3456 . Round the answer appropriately.
Express your answer numerically using the proper number of significant figures
2) A graduated cylinder contains 155 of water. A 17.0 piece of iron (density = 7.86 ) and a 24.0 piece of lead are added. What is the new water level in the cylinder?
3) An object has a mass of 3.45 and a volume of 0.1107 . What is the density () of the object?
4)
The specific gravity of iron is 7.87, and the density of water at 4.00 is 1.00 . You can use this information to find the density of iron. Find the volume occupied by 8.00 of iron.
Express your answer to three significant figures and include the appropriate units.
Physical Chemistry
What generalization can be made about the reaction between a metal and its own aqueous ion? - electrochemisty - an intro to redox.
Physical Chemistry
sample were collected in a zinc smelter to determine the exposure of a furnace tender to lead fume during his normal work duties which involves “furnace draws” and general activities around the furnace. Each draw lasts about 1.5 hr. These samples were collected at a flow rate of 3.5 LPM. The laboratory reported these lead masses on the samples for each draw: 1st draw: 12 ug: 2nd draw: 18 ug: 3rd draw: 25 ug. An 8 hour general room air sample collected at 1.9 LPM was found to contain 9.5 ug of lead. This worker spends 1.5 hours with each draw and the balance of his 8-hour day is spent watching the furnaces. Assume for the period of time he spends watching the furnaces, he has the same exposure as the general room air. You can be 95% confident that his true exposure for this day was between ug/m3 and ug/m3. At 95% confidence, would you conclude the exposure was in or out of compliance
Physical Chemistry
when one water molecule is fused with another water molecule, what does it become
Physical Chemistry
A sample of N2 has 1.70 moles and occupies 3.80 l at 25.0˚C.
A) What volume will it occupy with 2.60 moles?
B) How many moles are in a sample that occupies 1.45 L?
A) What volume will it occupy with 2.60 moles?
B) How many moles are in a sample that occupies 1.45 L?
Physical Chemistry
How much work is done if I push a crate 12 meters with a force of 362 n?
Physical Chemistry
Need observation
Half fill a test tube with tap water add teaspoon of ammonium chloride
Half fill a test tube with tap water add teaspoon of ammonium chloride
Physical Chemistry
how long is a spool of copper has a mass of 4.26 KG,diameter of 2.2 mm and a density of 8.96 g/cm3
Physical Chemistry
The volume of a gas is 400.0 mL when the pressure is 1.00 atm. At the same temperature, what is the pressure at which the volume of the gas is 2.0L?
Physical Chemistry
The volume of a sample of hydrogen is 798 mL and it exerts 621 mm Hg pressure at 5.00℃. What volume does it occupy at standard temperature and pressure?
