2. In a polyblend, of PVC with a Tg of 80 °C, and PTFE with a Tg of 115 °C, how much % PTFE is needed for a polyblend Tg = 92.7 °C ?

Why is GSC not used nearly as extensively as GLC?

In 10 g of a PVC sample (Mw = 100,000; Mn = 70,000), you add 20 g another PVC sample with Mw 60,000, PDI = 3. What will be the Mn of the new polymer mixture

Ash was estimated in the sample of hay, and the records were as follows, note that the moisture is 18%. Weight of crucible = 14 g Weight of crucible + sample = 15.2 g Weight of crucible + ash = 14.1 g Calculate: i. Ash percentage according to the fresh material ii. Ash percentage according to the dry matter iii. Organic matter percentage according to the dry matter iv. Organic matter percentage according to the fresh material

A dry-wet-dry oxidation cycle of 20 min – 80 min – 20 min is performed at 1100 °C. (a) What is the final oxide thickness for a <100> silicon wafer? (b) What is the final oxide thickness for a <111> silicon wafer?

An acid solution containing 2 per cent by mass of NaNO3, and an unknown concentration of HNO3 is used to regenerate a strong acid resin. After sufficient acid had been passed over the resin for equilibrium to attained, analysis showed that 10 per cent of resin sites were occupied by sodium ions. What was the concentration of HNO3 in the solution, if its density were 1,030 kg/cu.m.?

20. How does the operator control digestion time in an aerobic digester? 1. By controlling degree of sludge thickening before digestionmoon als sis and 2. By measuring out the amount of polymer added how 3. By automatically controlling when the tank s and closes through valves and the SCADA system opens 4. By controlling sludge blanket depth and thickness

A1.

If the cells were spread out into a thin layer that was a single cell thick, what would be the total surface area ( in square meters) for the top side of the cell layer ? Be sure your answer has the correct number of significant digits? ……m^2pls help me

An ore sample contains 11% impurity in additon to a mix of CuS and Cu2S. Heating 100g of the mix produces 75.4g of copper metal with a purity of 89.5%. What is weight 5 of CuS and Cu2S in the ore?