Chemical formulas describe the type and number of atoms within a compound. The molecular formula lists the symbol of each element within the compound followed by a number (usually in subscript). The letter and number indicate how many of each type of ele
The easiest way to count atoms: 1. Write down all of the symbols for all of the elements present in the formula 2. If there is a coefficient, write this number next to each of the symbols 3. Multiply the coefficient by the subscripts of each of the elements present in the formula Let...
Re: How do you know the number of atoms in a substance? «Reply #1 on:September 10, 2018, 07:14:47 AM » Its hard to know how to answer your question, just as is stated. If someone tells you 'KCl' or 'H2SO4', then you can simply count the formula. You gave us the for...
How many C atoms are present in the compound?a. 8 b. 4 c. 6 d. 2I recalled from lecture that when dealing with M+1 peak, we used this formula: intensity of M+1 peak / 0.011 = number of C atoms (important to round to the nearest whole number)So I dealt with: 0.0381 / 0.011...
How could Avogadro and his colleagues determine the number of atoms in a given substance, or any quantitative property of a single atom, when the technology to observe individual atoms was not invented until the twentieth century? Pioneering scientists of the atom, such as Avog...
With reactions, it's whole particles (atoms and molecules) you need to count. These are measured inmoles, and translating them into this "language" from mass only requires you to know the molar masses of the constituent atoms. What Is a Mole?
Atomic number:The number of protons in an atom's nucleus is referred to as the atomic number of that element. The number of protons defines what element it is and determines its chemical behavior. For example,carbon atomsalways have six protons;hydrogen atomsalways have one; andoxygen atomsalw...
A strong lamp illuminates the sheet of paper to be copied. Making a photocopy requires a light source with enough energy to boot electrons out of the photoconductive atoms. What wavelengths of light can do this? It turns out that most of the visible spectrum of light contains enough energy ...
I am known to be occasionally wrong. Re: How many atoms of P are in 5 moles of P4O10? «Reply #5 on:January 02, 2011, 02:53:44 PM » Wasn't that hard. Logged ChemBuddychemical calculators - stoichiometry, pH, concentration, buffer preparation,titrations.info ...
Carbon atoms rising in the flame emit light as they heat up. (Check out How Light Bulbs Work to find out why heated objects emit light.) The heat of the flame keeps the fuel at the ignition temperature, so it continues to burn as long as there is fuel and oxygen. As you can see,...