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

A) 23.7 x 3.8 What is

During a canoe race, a camper paddles a distance of 406 meters in 70 seconds. what's the average speed of the race?

What would decrease the pH lvl of an acidic solution

Is sodium hydroxide dissolves in water a physical change

How much carbon dioxide in kilograms is produced upon the complete combustion of 29.4 L of propane (approximate contents of one 5-gal tank) ? Assume that the density of the liquid propane in the tank is 0.621 g / mL.

Define "Homoglycan" and "Heteroglycan" and give an example of each

If you have 200 grams of iodine how many atoms do you have?

Sea salt is formed by natural evaporation of ocean water and contains 98% sodium chloride. The remaining 2% are natural minerals such as iron and sulfur. Consider a 84.7-g sample of sea salt.

Which element in group 15 is the strongest metallic character?

Can neptune sustain life?