Nomadic people received income from where

Which one of the following is not the property of graphite? A. Soft B. Greasy C. Transparent D. Black

What are 2 factors that affect gravitational attraction?

Write a balanced half-reaction for the reduction of dichromate ion cr2o-27 to chromium ion cr 3 in basic aqueous solution. be sure to add physical state symbols where appropriate.

Why are ionic solids poor conductors of electricity?

What is an end product when sodium bicarbonate is used as an antacid? a. NaCl b. CaCl2 c. HCl d. CO

Which of the following experimental observations proved that the idea of matter and mass being evenly distributed in an atom was flawed? A. Less than 1% of the alpha particles went un-deflected through the gold foil. B.

Calculate the energy E of a sample of 3.50 mol of ideal oxygen gas (O2) molecules at a temperature of 310 K. Assume that the molecules are free to rotate and move in three dimensions, but ignore vibrations.

Gasohol is a fuel containing ethanol (c2h6o) that burns in oxygen (o2) to give carbon dioxide and water.

What type of rock does the ocean floor consist of? 1 Igneous basalt rock 2 Igneous granite rock 3 Sedimentary rock 4 Metamorphic rock

Consider the combustion of liquid methanol, ch3oh (l) : ch3oh (l) + 3/2o2 (g) →co2 (g) + 2h2o (l) δh=-726.5kj part a what is the enthalpy change for the reverse reaction?