(d) Which is the best material for a heat-resistant glove?

A student is given a sample of red cobalt sulfate hydrate. She weighed the sample in a dry covered crucible and obtained a mass of 25.050 g for the crucible, cover, and sample. Before adding the sample, the crucible and cover weighed 23.422 g. She then heated the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then let the crucible cool, and found it had a lower mass; the crucible, cover and contents then weighed 24.321 g. In the process the sample was converted to blue anhydrous CoSO,. Show all calculations necessary to answer the following questions. 1. What was the mass of the hydrate sample? g hydrate 2. What is the mass of the anhydrous CoSO,? g CoSO, 3. How much water was driven off? g H,O 61 I

Which of the glove materials listed in this study meet the standard guidelines set by OSHA for methylene chloride?  Explain.

The difference between rubber bands and car tyres is that: a.)Tyres are made through a process of romulisation b.)Rubber bands are made through a process of romulisation c.)Tyres have more cross links than rubber bands d.)Rubber bands have more cross links than tyres do

What makes diamond one of the strongest materials known by scientists?

describe two end uses of linen and wool fiber.

What information would you need in order to predict the best solvent for glue ?

The best known acrylic is polymethylmethacrylate, which is sold as a product known as lucite. (a) Sketch the structure of the polymer. (b) Is it linear or network-shaped?, (c) Is it crystalline?, (c) Is it thermoplastic?