Is ice melting a physical change or a chemical change and why

A student makes a compound of sulfur and oxygen. She uses 5.00 g of sulfur and 4.99 g of oxygen, and all of the elemental substances are completely used up. What is the percent sulfur in the compound?

The following equation can be used to relate the density of liquid water to Celsius temperature in the range from O°C to about 20°C, rho (g/cm3) = 0.99984 + (1.6945 x 10-2 t) - (7.987 x 10-6 t2) 1 + (1.

Give me 15 diffent elements

What is the most endangered animal in water and on land?

What is the [H3O+] of a solution with a pH of 8.43?

Describe how the atoms in Calcium Chloride obey the octet rule.

How many milliliters of 2.55M NaOH is needed to make 125mL of 0.75M NaOH solution?

2. What type of bond holds together nitrogen atoms? a. Single Bond b. Double Bond c. Triple Bond d. no bonds hold nitrogen together

Charge on monatomic ions: a) I b) Sr c) K d) N e) S f) In

What is the actual yield if only 50% of a theoretical yield of 200g is formed. A.) 100g B.) 75g C.) 120g D.) 140g