What is evidence of a physical change. A. ice melts B. silver tarnishes C. biycicle rusts

Using table 9.4, calculate an approximate enthalpy (in kj) for the reaction of 1.02 g gaseous methanol (ch3oh) in excess molecular oxygen to form gaseous carbon dioxide and gaseous water. (hint, remember to first write the balanced equation.)

Which monomers make up carbohydrates? A: amino acids B: monosaccharides C: triglycerides D: nucleotides

Lead has a density of 11.3 grams/cm cubed. What mass of lead will fit in a 20 cm cubed container?

Describe how a change in state could occur

What country used the most energy in world during both 1990 and 2003?

How does the calorie compare to the metric unit the joule? How do you calculate a calorie? Is it the same for all types of food?

Under which conditions would the solubility of a gas be greatest? A. high pressure and high temperature B. high pressure and low temperature C. low pressure and high temperature D. low pressure and low temperature

How many milliliters is 0.55 L? O A. 1000 ml OB. 0.00055 mL O C. 550 ml D. 55 mL

When a warm front passes your location, the temperature rises rapidly. As a result, air density: B? increases decreases remains the same

A scientist wished to carry out a chemical reaction in which two moles of aluminum combine with three moles of sulfur. He has 2.70 g of aluminum to react. How many grams of sulfur must he take to satisfy all the aluminum atoms? 1.51 g 2.14 g 3.