A neutral atom has two electrons with n = 1, eight electrons with n = 2, eight electrons with n = 3, and one electron with n = 4. It has no other electrons. What is the atomic number of this element?

To raise the temperature of 166.3 g of water from 50.00 °C to 60.00 °C requires how much heat?

A block of wood has a height of 10 m, a length of 2 m, and a width of 2 m. What is the volume of the block? A. 14 m³ B. 20 m³ C. 40 m³ D. none of the above

Gasohol is a mixture of ethanol and gasoline. C2H5OH (l) + O2 (g) CO2 (g) + H2O (g) Balance the equation. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.

Carbon can form many different types of covalent compounds with a variety of other elements. True False

Which of the following properties of a transverse wave is the distance from one trough to next? A) amplitude B) frequency C) intensity D) wavelength

Why does the body of the bird covered with feathers?

One molecule of caffeine contains 8 atoms of carbon, 10 atoms of hydrogen, 2 atoms of oxygen, 4 atoms of nitrogen. write the formula for caffeine with the elements in the order they are given.

A piece of magnesium metal is heated in the presence of chlorine gas, and a reaction takes place. What compound will most likely be produced? A. Mg2C1 B. MgCl3 C. MgCl2 D. MgCI

What is the pressure of the gas in this mercury manometer if h = 81 mm and atmospheric pressure is 749 mmHg

A microscope containing two or more lenses is an