Lay

This page lists questions and answers that were posted by visitors named Lay.

Questions

The following questions were asked by visitors named Lay.

a solution of sulfuric acid was titrated with sodium hydroxide. if you took 23.7 mL of .025 M NaOH to reach the endpoint with a 5.0 mL sample of the acid what was its concentration?
10 years ago
Describe how one would prepare these solutions in the laboratory, using weights reagents and volumes of solutions: -500 mL of .100M K2Cr)4 stock solution from pure K2CrO4(s) -10mL of .0025M K2CrO4(aq) from .100M K2CrO4(aq) -What would the concentrations o...
10 years ago
A constant volume (bomb) calorimeter was calibrated in an analytical laboratory by burning 1.057g of benzoic acid (C7H6O2) which has an enthalpy of combustion of -3228 kJ/mol. The temperature of the calorimeter rose from 22.75°C to 29.00°C. What is the he...
9 years ago
10mL of 0.500M HCl was added to 50mL of 0.100M NaOH in a coffee cup calorimeter, and the temperature increased from 22.3°C to 23.1°C. What is the experimentally determined enthalpy of neutralization of HCl (in kJ/mol)? The specific heat of water is 4.184J...
9 years ago
Calculate the enthalpy of the reaction of boron trioxide with steam: B2O3(s) + 3H2O(g) → 3O2(g) + B2H6(g) Given: H2O(l) H2(g) + 1⁄2 O2(g) 2B(s) + 3H2(g) 2B(s) + 3/2 O2(g) → B2O3(s) → H2O(g) → H2O(l) → B2H6(g) 44 kJ/mol -286 kJ/mol 36 kJ/mol -1273 kJ/mol
9 years ago
Sketch the graph of a polynomial of degree 2 with a leading coefficient of -3 whose zeros are -5 and 1.
9 years ago
A store discounted everything by 51%. The sales price of a scarf is $72.89. What was the original cost of the item?
8 years ago
What actions did progressive take to deal with the issue of child labor?
8 years ago
In how many ways can a commitee of 6 be chosen from 7 couples if 5 must be males.
8 years ago
A rare bacterial culture is being grown in a lab. As time passes, the cells multiply in a specific pattern.After 1 day, there is only 1 cell.After 2 days, there are 8 cells.After 3 days, there are 18 cells.After 4 days, there are 31 cells.How many cells w...
7 years ago
An object has a volume of 5cm^3 and a mass of 20 g. what is the density of the object?
4 years ago

Answers

The following answers were posted by visitors named Lay.