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Orlov [11]
3 years ago
9

Use exponential (scientific) notation to express the value 385,500 to 1 s.f.

Chemistry
1 answer:
lara31 [8.8K]3 years ago
7 0

To express the value 385 500 in scientific notation with 1 significant figure we have to move the decimal point to the left until we're left with a number between 1 and 10:

385500.0

38550.00 (1 space)

3855.000 (2 spaces)

385.5000 (3 spaces)

38.55000 (4 spaces)

3.855000 (5 spaces)

The number of spaces we moved to the left, is going to be the exponent of the number 10 that we are going to multiply to that number

3.855000*10⁵

Finally, we round the number so we have only one number different from 0 and this is the number expressed with scientific notation to 1 significant figure:

<u>4.0 * 10⁵</u>

<u></u>

Have a nice day!

#LearnwithBrainly

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Answer:


The Order is as follow,

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Explanation:

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Electronegativity Difference between Hydrogen and other given elements are as follow,


1) C-H;

               E.N of Carbon     = 2.55

               E.N of Hydrogen = 2.20

                                           ------------

               Difference              0.35


2) S-H;

               E.N of Sulfur       = 2.58

               E.N of Hydrogen = 2.20

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               Difference               0.38


3) H-Br;

               E.N of Bromine   = 2.96

               E.N of Hydrogen = 2.20

                                          -------------

               Difference              0.76


4) H-Cl;

               E.N of Chlorine   = 3.16

               E.N of Hydrogen = 2.20

                                           -----------

               Difference               0.96


Hence it is proved that the greatest electronegativity difference is found between H and Chlorine in H-Cl, therefore it is highly polar bond and vice versa.

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astraxan [27]

Answer:

Volume of the CO_{2} gas at 44°C is <u>258 ml.</u>

Explanation

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using Charles' law ,

\frac{V}{T} =\frac{v}{t}

where , V= initial volume          v= final volume

             T=initial temperature    t = final temperature

Given - pressure is constant ,

so , putting the values -

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v =?

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Now , putting the given values in charles' law ,

\frac{240ml}{295K} =\frac{v}{317K}

240ml x317K = v x 295K     (through cross multiplication )

v =\frac{240ml\times317K}{295K}

= 258ml .

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