3 years ago

Pls help this a test for Google classroom

Chemistry

1 answer:

muminat3 years ago

5 0

Occurs at a specific temperature

You might be interested in

. The element with the following

Ksenya-84 [330]

Explanation:

(a) Chlorine the first row Is 1s the second is 2s followed by 2p...etc as Chlorine has 17 electrons

7 0

3 years ago

What is Ka for HNO2(aq)

Sergio039 [100]

Answer:

I'm not sure if it's c I might be wring

3 0

3 years ago

Read 2 more answers

2Na+ 2H20 - > 2NaOH + H2

aalyn [17]

Answer:

3.17mol

Explanation:

moles of Na = m/M ; Where M - molar mass of Na which is 23

moles of Na = 73/23 =3.17mol

but from the eqn n(Na) : n(NaOH) = 2:2 = 1:1

: . moles of NaOH is also 3.17mol

3 0

3 years ago

Write reaction equations to explain how your acetic acid-acetate buffer reacts with an acid and reacts with a base.

guajiro [1.7K]

acetic acid = CH3COOH(aq) , acetate = CH3COO-(aq) and proton = H+(aq)

so...

CH3COOH(aq) <-> CH3COO-(aq) + H+(aq)

this is the dissociation of acid, therefore, it will yield H+ ions in solution, which are ACIDIC

then... for the acetate buffer, recall that

CH3COO-(aq) is a weak conjugate base, so, it can accept H+ if in excess

H+(aq) + CH3COO-(aq) <--> CH3COOH(aq)

therefore, addition of excess H+, will form CH3COOH slowly.. i.e. th epH will not increase drstically

Addition of OH- ins, from a strong base:

OH-(aq) + H+(aq) <--> H2O(l)

then, OH- is apdily converted to H2O, which is not basic, so pH won't change drastically.

6 0

4 years ago

The change from liquid to solid, or the reverse of melting, is called

Salsk061 [2.6K]

Wen a liquid turns into solid it loses thermal energy D freezing

3 0

4 years ago

Read 2 more answers