Describe how samples of nitrogen and oxygen can be obtained from air?

E. Answer the following questions in brief. 1. Which is a synthetic fibre: nylon or Jute? 2. Which simple unit forms polymer? 3. Which type of fibres are manufactured in factories? 4. Which fabric is also known as artificial silk? 5.

Cost of production reports can also be used to compare the materials output quantity to the a. administrative staff input quantity. b. materials input quantity. c. conversion output quantity. d. total conversion for the period.

Phosphorus has three electrons in its 3p sublevel and sulfur has four. Phosphorus should have the lower ionization energy but it does not, sulfur does. Why? A.

For the reaction: 6 Li (s) + N2 (g) → 2 Li3N (s) Determine: a) the mass of N2 needed to react with 0.536 moles of Li. b) the number of moles of Li required to make 46.4 g of Li3N. c) the mass in grams of Li3N produced from 3.65 g Li.

Describe the relationship between gravitational force and distance as shown in the diagram.

What happens when light from the sun passes through any type of matter? the light slows down. the light speeds up. most of the light is absorbed. most of the light is reflected.

What is the chemical name for Fe (HCO3) 2

How are protons, electrons, and neutrons correctly compared

You compare two layers to a because the crust and upper mantle are solid

A substance that speeds up the rate of a chemical reaction is called a. a catalyst. b. a lipid. c. a molecule. d. an element.