Determine how many molecules of water occur
If Epsom salt, MgSO4, H2O, is heated to 250degrees C, all the water of hydration is lost.0.824g of MgSO4remains, on heating a 1.687-g sample of the hydrate. Determine how many molecules of water occur the pure formula unit of MgSO4?
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With a volume of 59.7ml a metal slug weighing 25.17g is added to a flask. It is found that to fill the glass the 43.7g of methanol (d=0.791g/ml) must be added to the metal. Discuss the density of the metal?
Glucose levels in patients free of diabetes are assumed to follow normal distribution with mean of 120 and a standard deviation of 16. What proportion of patients have glucose levels exceeding 115?
Ascorbic acid, Vitamin C is a water-soluble vitamin. At 55 C a solution having the 80.5 g of ascorbic acid dissolved in the 210 g of water has a density of 1.22 g/ml.
Determine number of bacteria present in culture after7 hours. Determine time that it takes culture to grow to20 times its initial size.
Calculate a 95% confidence level for the difference in means of the two treatment tand select the best answer below. Assume that the independent random samples were taken from normal distributions and that the two population variances are equal.
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What distinguishes raw scores from difference scores besides the fact that difference scores are used in t-statistic for repeated-measures research design?
Calculate if the heat of solution is endothermic and exothermic from the magnitude of the lattice energy and the hydration energy and vice versa and define the difference among the hydration energy and lattice energy.
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