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Veronika [31]
2 years ago
11

Two students made a model of the world's tallest building, the Burj Khalifa in Dubai. The scale of the model is 1:400. The stude

nts' model has a height of 2.07 m. How tall is the real building? O A. 0.005 m O B. 400 m O C. 193 m O D. 828 m ​
Chemistry
1 answer:
Anna [14]2 years ago
4 0

Answer:D

Explanation:

828m

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The following are electronegativity. What value should be where the M is?0.981.57M2.553.043.443.98No data
ipn [44]

Answer 2.04

Explanation

Electronegativity decreases down the group and increases across the period in the periodic table.

In the period two of the periodic table,we have the following values for electronegativities with respect to its elements.

Li...........0.98

Be.........1.57

B..........2.04

C.........2.55

N..........3.04

O...........3.44

F...........3.98

Ne........n.a

The value that should be where M is is 2.04

6 0
1 year ago
Write the molecular formula for a compound with the possible elements C, H, N and O that exhibits a molecular ion at M
liberstina [14]

Answer:

= \mathbf{C_3H_6O}

Explanation:

From the given information, since the molecular mass of the ion M+ is not given;

Let's assume M+ = 58.0423

So, by applying the 13th rule;

we will need to divide the mass by 13, after dividing it;

The quotient n = no. of carbon; &

The addition of the quotient (n) with the remainder r =  no. of hydrogen.

So;

\dfrac{58}{13}= 4 \ remainder \ 6

So;

C_nH_{n+r} = C_4H_{4+6}

= C_4H_{10}

From the given information; we have oxygen present, so since the mass of oxygen = 16, we put oxygen in the molecular formula by removing CH_4. Also, since the mass is an even number then Nitrogen is 0.

So, we have:

= \mathbf{C_3H_6O}

6 0
3 years ago
What type of organic compound contains the following functional group?
Shtirlitz [24]
That's a ketone's functional group :)
4 0
3 years ago
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Can anyone think of some interesting facts about hydrogen? I know that there are plenty, I'm just drawing a blank right now. I'l
podryga [215]
hydrogen is the lightest element in the periodic table
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A) An iron nail is attracted to a magnet.
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there's no question on here

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3 years ago
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