3.7 moles sodium (6.022 X 10^23/1 mole Na)
= 2.2 X 10^24 atoms of sodium
Sodium does not have allotropes with more than a single atom of sodium. Therefore, the number of atoms in 3.91 moles is (3.91) X Avogadro's number or 2.35 X 1024 atoms.
1 mole of Na contains no. of atoms = 6.02 *1023
3 moles of Na contains no. of moles = 3(6.02 *1023) = 1.806 * 1024
3.5 mol Na * (6.022*1023 atoms Na/1 mol Na) = 2.1077*1024 atoms
There are about 2.108*1024 atoms in 3.5 moles of sodium.
3.5 moles Al (6.022 X 1023/1 mole Al)
= 2.1 X 1024 atoms of aluminum
=======================
3.5 times Avogadro's Number (which is roughly 6.02x1023)
or about 2.11 x ten to the 24th power.
204.54 grams.
-391 degrees Fahrenheit is -235 degrees Celsius.
CO2 levels were about 260-280 ppm immediately before industrial emissions began and did not vary much from this level during the preceding 10,000 years. The concentration of carbon dioxide (CO2) in Earth's atmosphere has reached 391 ppm (parts per million) as of October 2012. ((391-260)/391)*100 = 33.50 Thus there has been a 33.5% increase in the levels of CO2 in Earth's atmosphere over the past 250 years.
A mixture of chlorine and oxygen gases does not react. However a photochemical reaction can occur when a mixture of gases is irradiated with UV light. This forms the chlorine monoxide, ClO a molecule with an odd number of electrons, a radical. This is highly reactive. Chemists have synthesised a number of chlorine oxygen compounds but these do not involve the reaction of the gases. There are a number of compounds known, chlorine dioxide, ClO2, dichlorine monoxide, Cl2O, dichlorine hexoxide, Cl2O6; dichlorine heptoxide, Cl2O7. All of these are reactive compounds. Additionally there are a number of chloroxy anions, such as hypochlorites, ClO- , chlorites, ClO2- and perchlorates, ClO4-
Yes and no. We need greenhouse gases in our atmosphere to keep the earth warm enough for human life. So the right level of greenhouse gas is good. Too much greenhouse gases are bad for us. Carbon dioxide, methane, nitrous oxide and fluoridated gases are the gases which trap sunlight and heat from the surface of the earth and so they are used by the greenhouse effect to heat the atmosphere. This leads to overheating in the atmosphere which in turn leads to global warming.
It depends. Is it 391 pounds of foam, or 391 pounds of gasoline, or 391 pounds of uranium, or what?
Strictly, elements such as calcium do not have "moles", but the corresponding term, for Avogadro's Number of atoms of an element, is called "gram atomic mass". For calcium, this number is about 40.08 grams. Therefore, 9.8 grams of calcium is about 9.8/40.08 or 0.24 gram atoms, to the justified number of significant digits.
391
"Hush, Hush" by Becca Fitzpatrick has approximately 391 pages.
Saippuaprinsessa has 391 pages.
1000 Eros are worth nothing. It is no official currency and can be used for playing.
391
"Fools Crow" by James Welch has 391 pages in its paperback edition.
391 over 500 as a decimal = 0.782 391/500: = 391 ÷ 500 = 0.782 in decimal
391 miles
.............. ....391.... ....../\...... ...../..\..... ..../....\.... ..17..23.. ..............
25 is 6.39% of 391.