Explanation:
Solids have definite shape and distinct boundaries as such the intermolecular forces between them is maximum
Answer:
Density is a physical property that is determined by dividing the mass of a given amount of a substance by its volume.
Explanation:
Answer:
17.03052 or 17 for a whole number
Explanation:
Option (a) is correct.
A reducing agent is the one which loses electrons to other substance and an oxidizing agent is one which accepts electrons.
Here, In
![CrO_{3}](https://tex.z-dn.net/?f=%20CrO_%7B3%7D%20)
, Cr has oxidation number 6+ in the L.H.S of the equation, but on R.H.S its oxidation number is 0 i.e. it Cr has gained electrons such that total charge is 0.
And the oxidation state of Al in the left-hand side of equation is 0 and in right-hand side, it is +6.i.e. it has donated its electrons to Cr.
Hence, Cr is the oxidizing agent and Al is the reducing agent.
Answer: -
37.5 g of NaCl are in 250 g of a 15.0% (by weight) solution.
Explanation: -
Total mass = 250 g
Percentage of NaCl = 15.0 %
= ![\frac{Number of grams of NaCl present}{total mass}](https://tex.z-dn.net/?f=%20%5Cfrac%7BNumber%20of%20grams%20of%20NaCl%20present%7D%7Btotal%20mass%7D%20%20)
Thus
= ![\frac{Number of grams of NaCl present}{250g}](https://tex.z-dn.net/?f=%20%5Cfrac%7BNumber%20of%20grams%20of%20NaCl%20present%7D%7B250g%7D%20%20)
Number of grams of NaCl present = ![\frac{15 x 250g}{100}](https://tex.z-dn.net/?f=%20%5Cfrac%7B15%20x%20250g%7D%7B100%7D%20%20)
= 37.5 g