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Makovka662 [10]
4 years ago
6

1. In a hypothetical city, the temperature is dropping and the skies are clearing. How would the barometer be changing?

Chemistry
1 answer:
Klio2033 [76]4 years ago
5 0
<span>The barometric pressure would be rising a
cold would have just passed through Gotham. Higher pressure hinders cloud development and clears the skies</span><span>
</span>
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How much pure antifreeze must be added to 8 gallons of 10% antifreeze to make a 50% antifreeze solution?
QveST [7]

<u>Answer:</u> The amount of pure antifreeze that must be added is 6.4 gallons

<u>Explanation:</u>

We are given:

Percent of antifreeze given = 10 %

Amount of solution = 8 gallons

Let the amount of pure antifreeze be 'x'

Calculating the amount of pure antifreeze:

0.1=\frac{x}{8}\\\\x=(0.1\times 8)=0.8

Let the amount of pure antifreeze added in the solution be 'y'

Percent of solution to be made = 50 %

So,

0.5=\frac{0.8+y}{8+y}\\\\0.5(8+y)=(0.8+y)\\\\y=6.4

Hence, the amount of pure antifreeze that must be added is 6.4 gallons

5 0
4 years ago
The imagine shows the atomic arrangements of four different substances.
lukranit [14]
The answer would be water , carbon dioxide and methane because they all contain more than one element.

Water-H2O
Carbon Dioxide-CO2
Methane-CH4
7 0
3 years ago
Read 2 more answers
What mass of melamine, c3n3(nh2)3, will be obtained from 113.0 kg of urea, co(nh2)2, if the yield of the overall reaction is 73.
creativ13 [48]

The balanced equation for the reaction is:

6 HNCO(l) → C3N3(NH2)3(l) + 3 CO2(g)

Convert amount of urea from kg to moles

Molar Mass of urea = 60.06 g/mol so, 113 kg urea contains

113 kg / 60.06 = 1.88 mol urea

From balanced equation 6 moles of urea yields only 1 melamine, so divide the moles of urea by 6. 

1.88 / 6 = 0.313 kmol melamine

Now multiply 0.313 with molar mass of melamine that is 126 g/mol

126 x 0.313 = 39.438 kg

Yield of overall reaction is 73% so multiply 39.438 with 0.73

<span>39.438 x 0.73 = 28.799 kg is the answer</span>

6 0
3 years ago
What is the bond polarity of So2?
Bumek [7]

Answer:

covalent bonding

Type of Bonding: Sulfur Dioxide is a process of covalent bonding, since Sulfur and Oxygen are both non-metals. The Sulfur is in the center surrounded by 2 Oxygen atoms.

4 0
4 years ago
Determine the partial negative charge on the bromine atom in a c−br bond. the bond length is 1.93 å and the bond dipole moment i
vaieri [72.5K]

Answer:

The value is x  =  0.151  \ e

Explanation:

From the question we are told that

The bond length is l  =  1.93\  \r  a =  1.93 *1 *10^{-10}  =1.93 *10^{-10}\  m

The bond dipole moment is \mu  = 1.40 d  = 1.40 *  3.33564 *10^{-30}  =  4.6699 *10^{-30} \  C \cdot m

Generally the dipole moment is mathematically represented as

\mu  =  Q *  l

Here Q is the partial negative charge on the bromine atom

So

Q =  \frac{\mu}{ l}

=> Q =  \frac{4.6699 *10^{-30}}{ 1.93 *10^{-10} }

=> Q = 2.42 *10^{-20} C

Generally

1 electronic charge(e) is equivalent to 1.60*10^{-19} C

So x electronic charge(e) is equivalent to Q = 2.42 *10^{-20} C

=> x  =  \frac{2.42 *10^{-20}}{1.60*10^{-19} }

=>     x  =  0.151  \ e

3 0
3 years ago
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