Answer:
Ola tudo bem??
Meu nome é Ana Kesia, e o seu?
Foi mal, Nn consegui responder sua pergunta!
Mais mesmo assim obrigada pelos pontos!
Qualquer dúvidas estou aqui para ajudar!
Boa tarde, Tchau.
Answer:
most of the positively charged particles should bounce back at a range of angles as they collide with the atoms in the foil; only a few should pass straight through the foil
Explanation:
Given :
A 10.99 g sample of NaBr contains 22.34% Na by mass.
To Find :
How many grams of sodium does a 9.77g sample of sodium bromine contain.
Solution :
By law of constant composition , in any given chemical compound, the elements always combine in the same proportion with each other.
Therefore , percentage of Na by mass in NaBr will be same for every amount .
Percentage of Na in 9.77 g NaBr is 22.34 % too .
Gram of Na = 
.
Hence , this is the required solution .
Answer:
Explanation:
Sn(WC)2
if it is tungsten carbide this should be correct but there are many versions of carbide
Sn(MC2)2
could also be possible
the 2 next to MC should be a subscript
Chemical reaction
C2H2(g) + H2O(g) ⇄ CH2CHO(g)
a) Removing H2O(g) from the system
Remember that Le Chatelier principle states that when an equilibrium is disturbed the system will try to counteract to restate the equilibrim.
If you remove H2O(g) then the equilibrium will be displaced to the left, trying to produce more H2O(g), which means to reduce CH3CHO(g) and increasing the C2H2(g).
b) Adding CH3CHO(g)
To counteract the addition of CH3CHO(g) the system will try to regain equilibrium by producing more reactants: C2H2(g) and H2O(g)
c) Removing C2H2(g)
The system will again displace to the left, that is CH3CHO(g) will reduce and H2O(g) will increase.
d) Adding H2O(g)
The systmen will displace to the right reducing C2H2(g) and increasing CH3CHO(g).
