Answer:
The radius of an atom can only be found by measuring the distance between the nuclei of two touching atoms, and then halving that distance.
Explanation:
If we dry the hydrate then, what will remain is the amount of salt, all of the water will evaporate. We are then able to determine the masses of the salt and water and consequently be able to determine the number of moles by dividing the masses by the molar mass. Then, solve for the mole ratio.
Single replacement/displacement
<h3>Further explanation</h3>
Given
Type involves free element
Required
Type of reaction
Solution
Single replacement/displacement occurs when a more active element replaces another less active element in the compound to form a new compound
The activity of this element can be seen from the voltaic series
<em>Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au </em>
The more to the left, the element is more reactive (easily release electrons) and the stronger reducing agent
The general formula for single replacement :
A + BC ⇒ AC + B
From this general formula shows that <em>there are 2 free elements</em> on both sides (reactants and products)
Answer:
A pure substance consists of a single element or compound. Iron is formed only of iron (Fe) atoms; table salt is formed only by sodium chloride (NaCl) molecules. A mixture, however, is made up of different compounds and/or elements.
Explanation:
Answer:
1218.585
Explanation:
Looking at the subscripts we know there are 2 atoms of Fe, 3 atoms of C, and 6 of O.
Take the molar mass of each atom (from the periodic table) and multiply by the # of atoms
Fe: 55.845×2= 111.69
C: 12.011×3= 36.033
O:15.999×6=95.994
Add the values together: 243.717 g/mol
That is 1 mole of the molecule. Multiply by 5 for the final answer.
243.717×5=1218.585