The correct answer should be letter choice C) There is an equal number of each type of atom on the reactant and product side. Its C) because if its trying to conserve mass, than that means save or be equally balanced so it should be even for both sides.
Answer:
1. 0.22 mol/dm³
2. 0.23 mol/dm³
Explanation:
Molarity: This can be defined as the concentration of a substance in mol per dm³
1.
M = n/v ...................... Equation 1
M = molarity of methanol, n = number of mole of methanol, v = volume of the solvent/water/solution.
<em>n = g/m.m</em>
<em>Where g = mass of methanol, m.m = molar mass of methanol.</em>
<em>g = 6.4 g, m.m = 32 g /mole.</em>
<em>n = 6.4/32 = 0.2 mole</em>
<em>and ,</em>
<em>v = m/d </em>
<em>Where m = mass of water, d = density of water</em>
<em>m = mass of 50 moles of water = 18×50 = 900 g.</em>
d = 1000 g/dm³.
v = 900/1000 = 0.9 dm³
Substituting the value of v and n into equation 1
M = 0.2/0.9
M = 0.22 mol/dm³
2.
M = n/v
v = volume of the solution
v = (mass of methanol + mass of water in the solution)/density of the solution
v = [(900+6.4)/1000]/1.03
v = 0.9064/1.03
v = 0.88 dm³
n = 0.2 mole
Therefore,
M = 0.2/0.88
M = 0.23 mol/dm³
This is the answer that is completely drawn out
Compared to visible light, an electromagnetic wave that has a higher wavelength will also have <u>a lower frequency</u>.
That's because frequency and wavelength are inversely related.
f ∝ 1/λ
When one goes up, the other goes down and <em>vice vesa</em>.
Answer:
true
Explanation:
Polyatomic ions are covalent compounds that have an overall charge. In the ammonium ion, NH4 , nitrogen is covalently bonded (shares electrons)to four separate hydrogen atoms
