A quantity of an unknown gas is placed in a volume-adjustable cylinder. The temperature is 36.0ºC and the volume is set at 8.1 L. Then the temperature is raised to 250.0ºC and the volume is adjusted...

A quantity of an unknown gas is placed in a volume-adjustable cylinder. The temperature is 36.0ºC and the volume is set at 8.1 L. Then the temperature is raised to 250.0ºC and the volume is adjusted...

An irregular shape mineral has a density of 1.196 g/cm3. What is the mass of this mineral when placed in a graduated cylinder containing 200.mL of water, water rises to 208.6 mL?

If 12.0 g of hydrogen gas reacts with 15.0 g of oxygen gas to form water, what is the maximum amount of water that can be formed?

Determine the age of a rock containing .065g of 238uranium(Half-life: 4.5x10^9) and .042 of 206Carbon. (Assume all lead came from U). Enter answer in scientific notation and with correct...

A radioactive isotope at time t is 1/2 ^ t/t(half-life). The halflife of carbon 14 is 5730 yrs. What fraction of carbon 14 in a piece of charcoal remains after 19.0 yrs 1.600 x 10^4 yrs and 1.8000...

The following diagram (sorry, cant put in the diagram)shows what happened 10 minutes after the start of an experiment. The starch suspension in the membrane turned blue-black while the iodine solution...

A fabric remant from a burial site has a Carbon-14 / Carbon 12 ratio of .721 of the original value. How old is the fabric in years?

A cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. The system experiences an evolution of heat and the temperature change is 55 K. Calculate q. Express...

A 0.65 g sample of glucose (MW = 180. g/mol) is burned in a bomb calorimeter that has a heat capacity of 1.56 kJ/oC. The temperature of the calorimeter increases by 6.53oC. Calculate the molar...

A cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. The temperature of the gas inside the cylinder is then lowered by 97 K. Calculate q for this system...

A 2.44 g sample of stearic acid (C18H32O2), a common constituent of fats, is burned in a bomb calorimeter. The temperature of the calorimeter increases by 48.0oC (Celsius). Given that the energy...

Please look up the completed Lewis structure of atrazine and answer the following questions: -How many atoms are sp3 hybridized? -How many sigma bonds are in the completed...

You are given a piece of metal alloy that is made of tin and copper. If the density of the sample is found to be 8.59 g/mL what is the % Sn and % Cu in the sample?

Please help me calculate pH pOH = 7

There are two stable oxides of Lead(pb) that exist. Using concepts of stability, predict the formulas for the two oxides. ie Find the formula for the stable versions of PbxOy

A 591 mg sample of vaporized gaseous organic solvent containing only C and H occupies 258 ml volume at 100 C• and 760torr solvent is 85.63% C by mass what is the molar mass and molecular formula of...

university level question

UNIVERSITY LEVEL QUESTION

Question #1 In a titration 23.46 ml of 0.00325 M Ba(OH)2 neutralized 13.8 ml of HCL solution. What is the molarity of the HCl solution? Answer in units of M Question...

Thanks for the help