luvinavril07

3H2 + N2 -> 2NH3

How many molecules (not moles) of NH3 are produced from 5.17×10−4 g of H2

Which of the following kinds of proteins would you expect to contain a nuclear localization signal? Please choose all correct answers

Ribosomal proteins

DNA polymerases

Chromosomal proteins that bind DNA into a compact configuration

Secreted enzymes destined for the extracellular space

I am going to buy an iphone soon on a family plan for me and my dad who lives in california. i live in az, so i was wondering if i could buy a phone in az and get a california area code on it at activation or can i only get az area codes?

Find the amount of heat it would take to bring all of the ice to its melting point, 0C. (in J)

Q= suppose that in an insulated container, 0.100kg of water at 20.0C is mixed with 1.500kg of ice at . You are asked to find the final temperature of the system, but you are not told what the final phase of the system in equilibrium is.

You know, the one where it's playing on the intercom where Harrison ford is chasing Gary down the bowls of his 747.

An Open Barge is 12m tall, 22m wide, and 40m long.

If the barge is made out of 4.00cm -thick steel plate on each of its four sides and its bottom, what mass of coal can the barge carry in fresh water without sinking.

You construct an ocean-going barge out of 2.50×10^5kg of iron. The shape of your barge is a rectangular bottom measuring 18mx15m and having vertical sides.

What is the minimum height the sides must be so that your barge will float in the ocean?

Suppose you make the sides 75.0 % higher than the minimum necessary. What is the mass of the heaviest load you could carry in the ocean without sinking?

If your barge goes up the Mississippi River, which is fresh water, how much extra mass can you carry without sinking?

A sealed tank containing seawater to a height of 11.0m also contains air above the water at a gauge pressure of 3.00atm . Water flows out from the bottom through a small hole.

Calculate the speed in which the water comes out of the tank.

A large wooden turntable in the shape of a flat disk has a radius of 2.00m and a total mass of 120kg . The turntable is initially rotating at 3.00rad/s about a vertical axis through its center. Suddenly, a 70.0kg parachutist makes a soft landing on the turntable at a point on its outer edge.

What is the angular speed of the turntable after the parachutist lands? I tried combining the before and after speed, but that didn't work.

A 2.00kg frictionless block is attached to an ideal spring with force constant 315n/m . Initially the spring is neither stretched nor compressed, but the block is moving in the negative direction at 12.0m/s.

tried finding omega and T by using T= 2pi/omega and then plugging it into v=-omegaAsin(omega x T). didn't work?

A string is wrapped around a uniform solid cylinder of radius (r) , The cylinder can rotate freely about its axis. The loose end of the string is attached to a block. The block and cylinder each have mass (m) . Note that the positive y direction is downward and counterclockwise torques are positive.

I got Alpha= 2g/r but that's not right, so help please?

How many grams of indigo can be formed from 0.894 grams of 2-nitrobenzaldehyde? 2 C7H5NO3 + 2 C3H6O ---> C16H10N2O2 + 2 CH3CO2H + 2 H2O

Use the atomic weights given below. Atomic weights: C, 12.01; H, 1.01; N, 14.07; O, 16.00

A woman with mass 50.0kg is standing on the rim of a large disk that is rotating at 0.500rev/s about an axis perpendicular to it through its center. The disk has a mass of 110kg and a radius of 4.00m.

Calculate the magnitude of the total angular momentum of the woman-plus-disk system, assuming that you can treat the woman as a point.

I tried doing two separate momentum calculations for both woman and disk and adding, but didn't work.

A 15.0kh bucket of water is suspended by a rope of negligible weight that is wrapped around a solid cylinder 0.300m in diameter and with mass 12.0kg . The cylinder pivots on a frictionless axle through its center. The bucket is released from rest at the top of a well and falls 10.0m to the water.

a)tension in rope while falling?

b) time of fall?

c) while the bucket is falling, what force is exerted by the axle?

a) Calculate the angular momentum of a solid uniform sphere with a radius of 0.120m and a mass of 14.0kg if it is rotating at 6.00rad/s about an axis through its center

b)Calculate kinetic energy of a solid uniform sphere with a radius of 0.120 and a mass of 14.0 if it is rotating at 6.00 about an axis through its center.

A grinding wheel in the shape of a solid disk is 0.220m in diameter and has a mass of 2.50kg . The wheel is rotating at 2300rpm about an axis through its center.

a) kinetic energy?

b) how far would it have to drop in free fall to obtain this kinetic energy

You overindulged on a delicious dessert, so you plan to work off the extra calories at the gym. To accomplish this, you decide to do a series of arm raises holding a 5.00 weight in one hand. The distance from your elbow to the weight is 35.0 , and in each arm raise you start with your arm horizontal and pivot it until it is vertical. Assume that the weight of your arm is small enough compared with the weight you are lifting that you can ignore it. As is typical, your muscles are 20.0 in converting the food energy they use up into mechanical energy, with the rest going into heat.

If your dessert contained 350 food calories, how many arm raises must you do to work off these calories??

10.00 mL of a solution containing 0.20 M NaCl and 0.25 M AlCl3 is introduced into a cation exchange column.

Typically, such satellites orbit around 400km above the surface of the earth. If an astronaut weighs 750N on the ground, what will he weigh if he is 400km above the surface?

Given a stock solution of a food dye having a concentration of 1.0 x 10-5 and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 25.1 mL of distilled water, what should the absorbance of the new solution be???