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Lesechka [4]
3 years ago
5

What is empirical evidence

Chemistry
1 answer:
vladimir2022 [97]3 years ago
7 0
The correct answer is b
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At which point on a phase diagram do you have a solid a liquid and a gas simultaneously
Mekhanik [1.2K]
In a phase diagram, the point at which the solid, liquid, and gas coexist simultaneously is called the TRIPLE POINT. There is a specified pressure and temperature at which the substance can exist in equilibrium with these three phases being present. 
8 0
3 years ago
Read 2 more answers
In ironmaking, iron metal can be separated from iron ore (Fe2O3) by heating the ore in a blast furnace in the presence of coke,
mel-nik [20]

The limiting reactant is iron ore, the theoretical yield of iron metal is 701.344 kg, and the theoretical yield of carbon dioxide is 413.292 kg.

<h3>Stoichiometric problem</h3>

From the equation of the reaction:

2 Fe_2O_3(s) + 3 C(s) --- > 4 Fe(s) + 3 CO_2(g)

The mole ratio of iron ore to carbon is 2:3.

Mole of 1000 kg of iron ore = 1000000/159.69

                                          = 6,262 moles

Mole of 120 kg carbon = 120000/12

                                 = 10,000 moles

Thus, it appears that the carbon is in excess while the iron ore is limited in availability.

The mole ratio of the iron ore and the iron produced is 1:2. Thus, the equivalent number of moles of iron produced will be:

              6,262 x 2 = 12,524 moles

Mass of 12,524 moles of iron = 12,524 x 56

                                                = 701,344 g or 701.344 kg

Thus, the theoretical yield of iron is 701.344 kg.

The mole ratio of the iron ore and the carbon dioxide produced is 2:3. The equivalent mole of carbon dioxide produced will be:

         6,262 x 3/2 = 9,393 moles

Mass of 9,393 moles carbon dioxide = 9,393 x 44

                                                         = 413,292 or 413.292 kg

The theoretical yield of carbon dioxide is, therefore, 413.292 kg.

More on stoichiometric problems can be found here: brainly.com/question/14465605

#SPJ1

       

3 0
2 years ago
Which of the solids investigated could be used to make a hand warmer? Describe soenbof the critical characteristics an ionic sol
Tatiana [17]

Answer:

Iron and vermiculite.

Explanation:

Iron and vermiculite are the solid substances used to make a hand warmer. Hand warmers contains iron, water, activated carbon, vermiculite, cellulose, and salt. The high melting, boiling points, hard and brittle are the characteristics of an ionic solid used in hand warmer. Iron is the ionic solid which is used in the hand warmer. Once iron exposed to air, the iron oxidizes and releases heat in the process.

5 0
4 years ago
Help me with this plsss:((​
zepelin [54]
<h2><em>multiple </em><em>choice</em></h2>

  1. <em><u>A</u></em>
  2. <em><u>A</u></em>
  3. <em><u>B</u></em>
  4. <em><u>A</u></em>
  5. <em><u>C</u></em>
  6. <em><u>D </u></em><em><u>(</u></em><em><u> </u></em><em><u>I'm </u></em><em><u>not </u></em><em><u>sure</u></em><em><u>)</u></em>
  7. <em><u>A</u></em>

<em><u>hope </u></em><em><u>it</u></em><em><u> helps</u></em>

3 0
3 years ago
You have 3.012x10^23 molecules of sodium chloride - how many grams do you have?
lapo4ka [179]

Answer:

29.26 gram

Explanation:

No of molecules = no of mole × Avogadro's number

No of molecules = mass in gram/ molar mass × Avogadros number

Mass in gram =No of molecules×molar mass / Avogadros number

Mass in gram = 3.012 ×10^23 × 58.5/6.02×10^23

29.26 gram

8 0
3 years ago
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