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2 years ago

5

What is the positive ion and negative ion in sodium sulfate

1 answer:

garri49 [273]2 years ago

3 0

Answer:

positive is sodium, negative is sulfate

Explanation:

a compound has a cation and anion to form a compound. the first element is a cation and the second is an anion.

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An atom has completely filled inner shells and a single valence electron in an excited p state. The filled inner shells have an

umka2103 [35]

Answer:

1

Explanation:

Lz=projection of L vector on the direction of the magnetic field

l=-1: theta=135 deg

l=0: theta=90 deg

l=1: theta=45 deg

7 0

2 years ago

1. This balanced equation represents a chemical reaction.

Dafna1 [17]

Answer:

combustion is the answer

5 0

2 years ago

Start with 100.00 mL of 0.10 M acetic acid, CH3COOH. The solution has a pH of 2.87 at 25 oC. a) Calculate the Ka of acetic acid

jasenka [17]

Answer: a) The $K_a$ of acetic acid at $25^0C$ is $1.82\times 10^{-5}$

b) The percent dissociation for the solution is $4.27\times 10^{-3}$

Explanation:

$CH_3COOH\rightarrow CH_3COO^-H^+$

cM 0 0

$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Give c= 0.10 M and $\alpha$ = ?

Also $pH=-log[H^+]$

$2.87=-log[H^+]$

$[H^+]=1.35\times 10^{-3}M$

$[CH_3COO^-]=1.35\times 10^{-3}M$

$[CH_3COOH]=(0.10M-1.35\times 10^{-3}=0.09806M$

Putting in the values we get:

$K_a=\frac{(1.35\times 10^{-3})^2}{(0.09806)}$

$K_a=1.82\times 10^{-5}$

b) $\alpha=\sqrt\frac{K_a}{c}$

$\alpha=\sqrt\frac{1.82\times 10^{-5}}{0.10}$

$\alpha=4.27\times 10^{-5}$

$\% \alpha=4.27\times 10^{-5}\times 100=4.27\times 10^{-3}$

5 0

3 years ago

What property can be used to separate oil from milk?

Usimov [2.4K]

Answer:

Density oil will float

Explanation:

3 0

3 years ago

PLEASE ANSWER ASAP.id really appreciate it .Do metalloids have low or high density?

emmasim [6.3K]

Metalloids have a high density.

7 0

3 years ago

Read 2 more answers