A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is 19.78 nm. What is the total width of a crystal in millimeters 105 molecules across? Write your answer as a decimal.

Isotopes of the same element have different a. numbers of neutrons b. numbers of protons c. numbers of electrons d. atomic numbers

Over the past 150 years, how has fossil fuel consumption affected the carbon dioxide concentrations in the atmosphere?

If you wanted to detect x-rays coming from the sun, where would you place the detector? And why?

What scientist design an experiment that enabled the first successful detection of an individual particle

Calculate the thermometer in an air-conditioned room reads 20.0°C what is the temperature of the room In degrees Fahrenheit and in kelvins? Show your work

Which atomic orbitals overlap to form the C-O bond of dimethyl ether, (CH3) 20? O c 2sp^3 + 2sp^3 OC 2sp^2 + 0 2p O c 2sp^2 + 0 25p^2 O C 2sp^3 + O 2sp?

For the reaction CO+2H2=CH3OH at 700 K, equilibrium concentrations are [H2]=0.072 M, [CO] = 0.020M, and [CH3OH] = 0.030 M. Calculate K

How to make fluffy slime without contact solution?

When you mixed 20 grams of magnesium and an excess of nitric acid, 1.7 grams of hydrogen was actually produced. What is the percent yield of hydrogen during this reaction? Mg + 2HNO3 Mg (NO3) 2 + H2 3.3 % 48.5 % 25.7 % 102 % 98 %

A small cubical furnace 50 by 50 by 50 cm on the inside is constructed of fireclay brick [k = 1.04 W/m. degree C] with a wall thickness of 10 cm. The inside of the furnace is maintained at 500 degree C, and the outside is maintained at 50 degree C.