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Svet_ta [14]
3 years ago
10

1 Anatomhas 20number?with 39neutronmass numberit'satomic​

Chemistry
1 answer:
masya89 [10]3 years ago
3 0

yes it is atomic if the mass number is that high

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In Earth's water cycle, evaporation takes place as solid ice and snow are converted to water vapor. true or false?
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This is true, vapor is just evaporated water. Like in machines, you have to fill it up with water so your machine can produce the water vapor. Hope this helps!!
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Scientists who possess this attitude always report their observations and results truthfully.
vesna_86 [32]
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7 0
3 years ago
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
3. Perform each calculation to the correct number of significant figures.
Gwar [14]

Answer:

0.14

Explanation:

6 0
3 years ago
Which statement regarding water is true? Energy must be given off in order to break down the crystal lattice of ice to a liquid.
Vlada [557]

Answer:  All of the statements (A-D) are false

Explanation: All of the given statements are wrong as Hydrogen bonds are weaker than the ionic and the covalent bonds.

Liquid water is more dense than the solid water.

When heat or temperature is provided to the system of the ice, not only covalent bonds are broken but also hydrogen bonds also get broke.

Energy must not be given off in order to break down the crytsal lattice of ice to a liquid. Infact in changing the phase of the water, energy is released.

8 0
3 years ago
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