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Question- Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a 2.62 g sample of fluorite contains 1.61 g calcium. Calculate the following.
(a) Mass of fluorine in the sample
(b) Mass fraction of calcium and fluorine in fluoritecalciumfluorine
(c) Mass percent of calcium and fluorine in fluoritecalciumfluorine
Answer all three questions and provide required steps
What is the change in internal energy (in J) of a system that releases 840 J of thermal energy to its surroundings and has 119 cal of work done on it? can you show work please the anser is -342
the chromatographic paper in the spot testing chromatogram. predict the effect of this procedural change on the solution of the cation in the standard mixture
When a solution of sodium sulfate, Na2SO4, adjusted to a pH of 7 is electrolyzed, red litmus and a gas is evolved in the anodic chamber. In the cathodic chamber, red litmus turns blue and a gas is also evolved.
you are back at your plant the monday after the dangerous when wet leaking tanker incident happened and you are telling
How does insulin promote glycogen synthesis in the liver? By binding to glycogen phosphorylase. By activating glycogen phosphorylase. By inhibiting glycogen synthase.
In the fish processing industry, the fish cake is dried in rotary drum dryers. The fish cake consists of bone dry fish (BDF) and water. The resulting product is finely ground as well as packed for sale.
Suppose you were asked to carry out an aldol condensation reaction between benzaldehyde and 5-methylhexanal,
The temperature of the calorimeter and its contents increases from 20.00 C to 23.69 C. What is the heat capacity of the calorimeter (J/C)
If lead, which makes up 86.6% of galena and a particular ore contains 68.5% galena, what ,mass of ore is required to make a lead sphere with a 4.00 cm radius?
0.25 mol of formic acid (HCO2H) is dissolved in enough water to make one liter of solution. The pH of that solution is 2.19. The Ka of formic acid is
What is the boiling point of a solution of 0.25g of a nonvolatile solute (molar mass 85 g/mol) dissolved in 12g Benzene. Kbp for benzene = 2.53 (oC/m), Normal boiling point 80.10 oC.
Problem- Assume that the Pit down forger has also used group 1 and group 2 cations to stain the bones. How could this potentially affect your results?
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