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-Dominant- [34]
3 years ago
6

Imagine the earth's hydrosphere began to dry up and disappear. all of the following would be affected except

Chemistry
2 answers:
RoseWind [281]3 years ago
6 0
Answer most suited would be A
katen-ka-za [31]3 years ago
3 0

A is right. I just took the test on plato.

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Isoflurane, shown here, is a common inhalation anesthetic. write its molecular formula and calculate its percent composition by
Natalka [10]

Molecular formula of Isoflurane is <span><span>C</span></span>₃H₂ClF₅O.

Now calculate the percent composition by mass, which means percent of each element in the compound.

Mass of Isoflurane = 184.49 g/mol

Mass of carbon in the compound = 3 x 12.011 = 36.033g

Mass of hydrogen in the compound = 2 x 1.008 = 2.016g

Mass of chlorine in the compound = 1 x 35.453 = 35.453 g

Mass of fluorine in the compound = 5 x 18.998 = 94.99g

Mass of Oxygen in the compound = 1 x 16 = 16 g

Carbon’s percentage = Mass of carbon in the compound /mass of isoflurane x 100 =36.033/184.49 x 100 =19.53%

Hydrogen’s Percentage = Mass of hydrogen in the compound/mass of isoflurane x 100 = 2.016/184.49 = 1.09%

Chlorine’s percentage = Mass of chlorine in the compound/mass of isoflurane x 100 = 35.453/184.49 =19.22%

Flourine’s percentage = Mass of fluorine in the compound/mass of isoflurane x 100 = 94.99/184.49 x 100 = 51.49%

Oxygen’s percentage = Mass of Oxygen in the compound/mass of isoflurane x 100 =16/184.49 x 100 = 8.67%

<span> </span>

7 0
3 years ago
. A ________________ is formed when two or more ______electrons____ bond by a covalent bond.
Liono4ka [1.6K]
The first blank is Covalent compound
For the second blank, you are correct, though you may elaborate by specifying 'valence' electrons
6 0
3 years ago
Determine the molecular formulas of these compounds:
lianna [129]

The molecular formulas of the empirical ones of P₂O₅ and CH₂O are P₄O₁₀ and C₇H₁₄O₇, respectively, knowing that their molar masses are 310 and 200.18 g/mol, respectively.  

<h3>1. Molecular formula of P₂O₅</h3>

We can calculate the molecular formula as follows:

MF = n*EF   (1)

Where:

  • MF: is the molecular formula
  • EF: is the empirical formula
  • n: is an integer  

To calculate the integer <em>n</em>, we need to use the following equation:

n = \frac{M}{M_{EF}}   (2)

Where:

  • M: is the molar mass of P₂O₅ =  310 g/mol
  • M_{EF}: is the molar mass of the empirical formula

The molar mass of the empirical formula of P₂O₅  is given by:

M_{EF} = 2A_{P} + 5A_{O}

Where:

  • A_{P}: is the atomic weight of phosphorus = 30.974 g/mol
  • A_{O}: is the <em>atomic weight</em> of oxygen = 15.999 g/mol

So, the <em>molar mass</em> of the <em>empirical formula</em> of P₂O₅  is:

M_{EF} = (2*30.974 + 5*15.999) g/mol = 141.943 g/mol  

Now, we can find the integer <em>n </em>(eq 2).

n = \frac{M}{M_{EF}} = \frac{310 \:g/mol}{141.943 \:g/mol} = 2  

Finally, after multiplying the integer <em>n</em> by the number of atoms on the empirical formula of P₂O₅, we have (eq 1):

MF = n*EF = 2 \times P_{2}O_{5} = P_{(2 \times 2)}O_{(5 \times 2)} = P_{4}O_{10}

Therefore, the molecular mass of P₂O₅ is P₄O₁₀.

<h3>2. Molecular formula of CH₂O   </h3>

We know:

  • M: molar mass of CH₂O = 200.18 g/mol

To calculate the integer <em>n</em> and so the molecular mass of the molecule, we need to calculate the<em> molar mass</em> of the <em>empirical formula</em> of CH₂O.

M_{EF} = A_{C} + 2A_{H} + A_{O} = (12.011 + 2*1.008 + 15.999) g/mol = 30.026 \:g/mol

 

Now, the integer <em>n </em>is equal to (eq 2):

n = \frac{M}{M_{EF}} = \frac{200.18 g/mol}{30.026 g/mol} \approx 7

Finally, the molecular formula of the molecule is (eq 1):

MF = n*EF = 7 \times CH_{2}O = C_{(1 \times 7)}H_{(2 \times 7)}O_{(1 \times 7)} = C_{7}H_{14}O_{7}                              

Therefore, the molecular formula of CH₂O is C₇H₁₄O₇.

Learn more about molecular formula here:

  • brainly.com/question/1247523
  • brainly.com/question/14327882

I hope it helps you!

4 0
2 years ago
the density of pure gold (au) is 19.3 g/cm3. what is the mass of a block of gold that measures 1.2 cm x 5.00 cm x 3.20 cm? pleas
Julli [10]

The density of pure gold (au) is 19.3 g/cm3. what is the mass of a block of gold that measures 1.2 cm x 5.00 cm x 3.20 cm? please show work.


Given: Density of pure gold = 19.3 g /cm^3

Measurement of block of gold =1.2 cm x 5.00 cm x 3.20 cm

To calculate : mass of gold

Formula used: Density = Mass / Volume

Volume = 1.2 cm x 5.00 cm x 3.20 cm = 19.2 cm^3

Mass of gold = Density X volume = 19.3 g /cm^3 X 19.2 cm^3  = 370.56 g

4 0
3 years ago
5 Points
GrogVix [38]

Answer:

B

Explanation:

By looking at how seismic waves change speeds as they travel

through Earth

3 0
3 years ago
Read 2 more answers
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