How many g of calcium were formed
Two samples of calcium flouride are decomposed into their constituent elements. The first sample produced 1.64 g of calcium and 1.56 g of flourine. If the second sample produced 294 mg of fluorine, how many g of calcium were formed?
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Find the number of moles of water that has been lost from MgSO4.7H2O, when you heat 2.9560 g of this hydrate to give the anhydrous MgSO4. Molar mass of MgSO4.7H2O = 246.5 g/mol and molar mass of H2O = 18.0 g/mol.
What is the probability of getting a negative test result? Given that you got a positive test result, what is the probability that you are actually healthy (i.e. that you do not have the disease)?
Find the flux of Earth's magnetic field of magnitude 5.00 10-5 T through a square loop of area 40.0 cm2 for the following: (a) when the field is perpendicular to the plane of the loop
A motor having a drive shaft which turns at 40 rad/s is available to provide the necessary power. Specify the location of the motor and design a mechanism required to perform the motion.
The rivets are 10 mm in diameter, spaced a distance s = 24.4 mm apart, and have an average shear strength of 35 MPa. Determine the maximum internal pressure in MPa if the rivets are not to shear.
Construct a 95% confidence interval estimate for the population proportion of adult cellphone owners who report that they use their phone to keep themselves occupied during commercials or breaks in something they were watching on television.
500 mL of a gas is collected under the following conditions, Pressure = 750 torr and temperture = 24 degree celsius. What will the new volume be when the temperature is 341 K and the pressure is 4.9 atm?
A 5.96-g sample of homogentisic acid, a weak organic acid having Ka=4.0 x 10^-5, is dissolved in 35.0 mL of water and its pH is measured to be 2.20. What is the molar mass of homogentisic acid?
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