What kitchen products would you be able to replace without using petroleum made products?

What semimetal can form four single covalent bonds.

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c