General Chemistry Answers

How many moles of H₂O will be produced from 2.9 grams of HCl?

What is the change in energy of a system that requires 80 J of energy to do 150 J of work?

In a biochemical assay, a chemist needs to add 2.93 g of glucose to a reaction mixture. Calculate the volume in mL of a 1.35M glucose solution she should use for the addition.

The technologist in the STAT lab evaluates another problem sample. This specimen had a creamy tomato soup appearance in the heparinized whole blood specimen. The results of laboratory testing are listed below. Test Sodium Potassium Chloride Bicarbonate Anion gap Patient 135 mmol/L 3.6 mmol/L 99 mmol/L 24 mmol/L Reference-Ranges 136-145 3.5-5.1 98-107 22-28 10-20 16 1. If you are the Med. Tech. What result/s are erroneous Why? 2. What are the expected results of ALL the test? Enumerate and explain why 3. What will you do to correct the error? What method will you use if you decide to repeat the test? 

How many moles of NaOH are there in 1 kg of sodium hydroxide

When 10.0 g KOH is dissolved in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 25.18 0C to 47.53 0C. What is the enthalpy change in kJ per mole of KOH dissolved in the water? The specific heat capacity of water is 4.184 J/g0C

the loss of a positron by Yttrium-85

A tank contains 325 moles of compressed helium gas. How many Helium atoms are in the tank?

A soda can contains about 14 grams of aluminum (Al), the most abundant element in Earth's crust. How many soda cans can be made from 52 moles of Al?

the formation of Thorium-228 by beta emission