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Oliga [24]
3 years ago
10

Which of the compounds below is not an example of a molecular solid?

Chemistry
1 answer:
Goshia [24]3 years ago
8 0
E
Water is the only polar compound so I guess that must be odd one out. I’m sorry I’m of no actual help.
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Determine the mass of 2.75 moles of CaSO4. Record your work and your answer.
maw [93]

Explanation:

RFM \:  = 160 \: g \\ 1 \: mole \: weighs \: 160 \: g \\ 2.75 \: moles \: weighs \:  \frac{2.75 \times 160}{1} g \\  = 440 \: g

6 0
3 years ago
An idea is being proposed. The steps that led to the idea are listed below:
Lena [83]

Answer:

No because opinion and social values may lead to bias

Explanation:

I'm smart >:)

3 0
3 years ago
What is the Ka of a weak acid (HA) if the initial concentration of weak acid is 4.5 x 10-4 M and the pH is 6.87? (pick one)
rewona [7]

Answer:

Ka = 4.04 \times 10^{-11}

Explanation:

Initial concentration of weak acid = 4.5 \times 10^{-4}\ M

pH = 6.87

pH = -log[H^+]

[H^+]=10^{-pH}

[H^+]=10^{-6.87}=1.35 \times 10^{-7}\ M

HA dissociated as:

HA \leftrightharpoons H^+ + A^{-}

(0.00045 - x)    x     x

[HA] at equilibrium = (0.00045 - x) M

x = 1.35 \times 10^{-7}\ M

Ka = \frac{[H^+][A^{-}]}{[HA]}

Ka = \frac{(1.35 \times 10^{-7})^2}{0.00045 - 0.000000135}

0.000000135 <<< 0.00045

Therefore, Ka = \frac{(1.35 \times 10^{-7})^2}{0.00045 } = 4.04 \times 10^{-11}

5 0
3 years ago
Which model was proposed as a result of Rutherford's scattering experiment where positive particles did not pass straight throug
dimulka [17.4K]

Answer:

the nuclear model of the atom

6 0
2 years ago
Pick the correct products for the following reaction acid + metal reaction: 2 HNO3 + Co --&gt;
MrMuchimi

Answer:

2. Co(NO3)2 + H2

Explanation:

Hello,

In this case, we are evidencing a simple displacement reaction wherein the cobalt is able displace the hydrogen to produce cobalt (II) nitrate and gaseous hydrogen as a result of cobalt's higher activity:

2 HNO_3 + Co\rightarrow Co(NO_3)_2+H_2

Therefore, answer is 2. Co(NO3)2 + H2.

Best regards.

3 0
3 years ago
Read 2 more answers
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