A. 250 Kelvin to Celsius

A 100-g sample of zinc sulfide contains 67.1 g zinc and 32.9 g sulfur. If a 1.19-g sample of zinc is heated with excess sulfur, 1.77 g of zinc sulfide forms. Are these data in agreement with the law of definite proportions?

Using the periodic table, how would you find elements with chemical properties similar to helium?

Several genes change in a population of crows that no longer mate with crows in other populations this is an example of?

Refraction occurs when the speed of light changes as it travels between mediums. T F

How can rice and flour mixture be separated?

How do find the volume of 60.0g of ether if the density is. 70g/mL?

Did the test solution react with the supernatant from the test tube that had the largest amount of precipitate? what can you infer about the molar ratio of this reaction?

Contrast mixtures with pure substances

A standard cell potential of which value describes a spontaneous redox reaction?

Using the combined gas law, if the volume of a gas at 155kPa changes from 22L to 10L. What is the new pressure if the temperature remains constant?