Answer:
To do this question. we first have to find the mass% of nitrogen in N2O and then, using that percentage, we can simply find the number of moles of N from the number of moles of N2O
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<u>Mass % of Nitrogen:</u>
Mass% of nitrogen = (Molar mass of N2 / Molar mass of N2O)*100
Mass% nitrogen = (28 / 44)*100
Mass% of Nitrogen = 0.63 * 100
Mass% nitrogen = 63%
<u>Mass of Nitrogen:</u>
So, now we can say that in any given mass of N2O. 63% of the total mass is the mass of Nitrogen
Hence, total mass * 63/100 = Mass of Nitrogen
Replacing the variables
40 * 0.63 = Mass of Nitrogen
Mass of Nitrogen = 25.2 grams
Answer:
Ca
Explanation:
Calcium atom has two electrons that are loosely attached to its outermost energy level. It easily looses these electrons during reactions than the other three elements ( aluminium,sodium and oxygen).
Ca₍aq₎⇒ Ca²⁺₍aq₎+2e⁻
Calcium ionizes by losing 2 electrons from its outer shell to form an ion with a charge of 2+
The H₂O is the formula of the chemical specie while the (s), (l) and (g) tell us the state in which it is present, where s is solid, l is liquid and g is gas.
Answer:
3.0 x 10⁻⁴ moles
Explanation:
Given parameters:
Amount of Ag atoms = 1.8 x 10²⁰ atoms
Unknown:
Number of moles of Ag atoms
Solution:
From mole concept, we know that a mole of a substance contains Avogadros number of particles.
The Avogadro's number of particles is 6.02 x 10²³.
Now:
Number of moles
= number of particles/6.02 x 10²³
Therefore:
Number of moles= 1.8 x 10²⁰ / 6.02 x 10²³
Number of moles = 0.3 x 10⁻³ moles
= 3.0 x 10⁻⁴ moles
Solubility is the amount of solute that can dissolve in a given solvent at a specified temperature or pressure. Therefore, solubility is affected by pressure and temperature such that increase in temperature increases the rate of solubility of substances. In additional solubility depends on the molecular size of the solute such that when other factors are kept constant then a solute with small particles will dissolve more faster. Therefore, to increase the rate of solubility Ryan may; increase the temperature of water.
