Answer:
False
Explanation:
Because it is false heat will always transfer so it require matter
Answer:
1.51 x 10²⁴ things
Explanation:
According to Avogadro's Constant.
1 mole of any substance, constains 6.02×10²³ particles of that subtance.
From the question,
If we have 2.50 moles of anything,
1 mole of anything ⇒ 6.02×10²³ things
2.50 moles of anything ⇒ y things
solving for y
y = (2.50× 6.02×10²³)/1
y = 15.05×10²³
y = 1.505×10²⁴
y ≈ 1.51×10²⁴
Answer:
camphor sublimates salt is soluble in water while sand does not sublime and does not dissolve in water you first heat the mixture in a beaker covered with a watch glass camphor will then accumulate on the watch glass then you dissolve the remaining mixture of sand and salt salt will dissolve forming a salt solution then you filter using a filter paper and a beaker the residue on the filter paper is sand while the filtrate is salt solution you then heat the salt solution so that it can evaporate leaving salt particles thus you will have obtained salt sand and camphor
<span>3 NO2 + H2O -------->. 2 HNO3. + NO
3(46g)------------------------> 2 ( 63g) HNO3
? kg-------------------------5.89 x10^3kg HNO3
Mass of NO2. = 5.89x10^3 x 138/ 2(63) = 6.45 x10^3 kg</span>
