Answer
HCl+NaOH=NaCl+H2O (NaCl+H20)=the product
is a double substitution reaction
so the product ,one of them will be or Nacl or Water(H2O)
Explanation:
2H2 + O2 = 2H2O
2mol. 1mol. 2mol
2mol reacts with 1mol
13mol reacts with x
x=<u>13mol</u><u> </u><u>×</u><u> </u><u>1mol</u>
<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u>2mol</u>
x= <u>13mol</u>
<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u>2mol
x= 6.5mol of oxygen
Answer: Group 1 would have the lowest electronegativity values.
Explanation:
Electronegativity is the power of an atom in a molecule to attract electrons. It is also synonymous with the oxidizing ability or non-metallic character of elements.
Generally, across a given period from left to right, electronegativity increases due to increasing nuclear charge and decreasing atomic radius ( or atomic size ). This is because there is a greater tendency for a smaller atom with higher nuclear attraction to attract electrons than a larger atom with a lower nuclear attraction due to the shielding effect of the nuclear attraction by the inner shell electrons on the outermost electrons in the larger atom.
Also, down a particular group, electronegativity generally decreases due to increasing atomic radius/size.
This is why metals are generally electropositive ( lose electrons ) and non-metals are electronegative ( gain electrons ) as they are both found more on the left and right sides of the periodic table respectively.
Multiply the number of each element by its mass on the periodic table.
Add them together.
Put the mass of carbon only over the total mass and multiply the result by 100 to get the percentage.
The half life of an isotope is the amount of time it will take for the given isotope to decay till the point where it reaches half of what amount you had started with.
If the half life of Ra-229 is 4 minutes then every 4 minutes the sample is reduced to half of what you had before
4 minutes.) 50/2 Ra-229 --> 25g Ra-229
8 minutes.) 25/2 Ra-229 --> 12.5 Ra-229
12 minutes.) 12.5/2 Ra-229 --> 6.25 Ra-229 remaining
<em>I beleive this is the correct answer</em>
