the temperature changed - 2 per hour for 5 hours. How many degrees did the temperature drop during that time period.

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 24.0 g of carbon were burned in the presence of 82.9 g of oxygen, 18.9 g of oxygen remained unreacted. What mass of carbon dioxide was produced?

What volume of a 1.0 M HCl is required to completely neutralize 25.0 ml of a 1.0 M KOH?

How many total carbon atoms are found in a molecule of 3-ethyl-2-pentene? 5 6 7 8?

Predict which member of each pair will be more acidic. Explain your answers. (a) methanol or tert-butyl alcohol (b) 2-chloropropan-1-ol

Calculate the molality of 2.0 M MgCl2 solution. The density of the solution is 1.127 g/mL. (The molar mass of MgCl2 = 95.211 g/mol and the molar mass of H2O is 18.02 g/mol.)

Convert 3.57 moles of aluminum to grams

An average microwave uses a frequency of 2.54 GHz. How much energy is emitted?

Why scientist form a hypothesis

Step two of the procedure states: "Using sterile technique, place a loopful of inoculum from the M. luteus culture in the drop of nigrosin and mix." Which of the procedures qualifies as sterile technique?

If 4.34 moles of potassium react with excess water, how many moles of hydrogen gas would be produced at STP