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The sodium emission intensity from the diluted sample is 0.092. The calibration curve for sodium is INa = 0.083 L.mg-1 [Na] + 0.001. What is the concentration of Na in the diluted carrot solution? W
initially unpolarized light is sent into a system of three polarizing sheets whose polarizing directions make angles of ?1 = ?2 = ?3 = 51° with the direction of the y axis, What percentage of th
The mass of a beaker is 123.2537 g. After carrots were added to the beaker, its mass is 128.2671 g. The sample was then placed in the oven to remove water.
How does bioremediation restore stability or clean up toxic pollutants and how does bioremediation control levels of pollution?
A zookeeper and a monkey. The zookeeper shot a tranquilizer gun with an initial v=30m/s. The monkey was up on a tree 140m high. What is the monkeys speed during free fall
What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA-, A2-) at pH 6.26
How many components are necessary to explain 90% of the variance"? Visual- ize the data by a scatter plot of the data projected on the rst two principal components.
A bike wheel (I=m*(r^2)) is spinning at 20 rad/s, at which point a 100 g rat jumps onto the wheel, what is the mass of the bike wheel
How many moles of hydrogen gas would be needed to react with excess carbon dioxide to produce 30.6 moles of water vapor? Express your answer with the appropriate units.
What concentrations of acetic acid (pKa = 4.76) and acetate would be required to prepare a 0.10 M buffer solution at pH 5.0. Enter your answer to two significant figures.
What mass of carbon dioxide was produced? Express your answer to three significant figures and include the appropriate units.
Calculate the pH when 6.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in dimethylamine (aq) and 0.100 M in dimethylamine hydrochloride (aq). Use the pKa given in
A block of mass 77 g floats on a fluid, oscillating up and down at a frequency of 8 Hz. What is the value (in N/m) of the effective spring constant of the fluid
How many moles of nitrogen, N, are in 65.0 g of nitrous oxide,N2O ? Express your answer with the appropriate units.
Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: \rm 2Al}+3Cl_2rightarrow2AlCl_3 What is the maximum mass of aluminum chloride that can be formed when reacting
A microscope has an objective lens with a focal length of 2.0cm, an eyepiece with a focal length of 0.25 cm, What is the magnification of the microscope
You come across an open container which is filled with two liquids. Since the two liquids have different density there is a distinct separation between them. what is the density of the unknown fluid
What is the mass of 3.20 moles of magnesium chloride,MgCl2 ? Express your answer with the appropriate units. mass of MgCl2 =
A high-speed photograph of a club hitting a golf ball is shown in the figure below. find the average force exerted on the ball by the club
A spaceship with a proper length of 101 m passes an observer at a speed of 0.82770c. What is the length of the ship as seen by the observer
Two blocks are connected by an ideal string that passes over a massless, frictionless pulley. determine the magnitude of the blocks acceleration
A 2.80 kg object moves in a plane with velocity components vx = 14.0 m/s and vy = -84.0 m/s as it passes through the point (x,y) = (0.7,-4.2) m. What is the magnitude of its angular momentum relative
An astronaut applies a force of 500 N to an asteroid, and it accelerates at 7.00 m/s2. What is the asteroid's mass
what the information about newly discovered virus that we should know before we could devolope an effective drug therapy
A beam of protons, each with kinetic energy of 40MeV, approaches a step potential of 30MeV. What fraction of the beam is reflected and transmitted