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Yakvenalex [24]
3 years ago
15

Consider two liquids, labeled A and B, that are both pure substances. Liquid A has

Chemistry
1 answer:
Scrat [10]3 years ago
4 0
E is the correct answer
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3. 79,789kJ = (293k) (377kJ)
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the anwser would most likely be j=0

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3 years ago
Can someone answer these few questions please?
Simora [160]

Answer:

2.10x10⁻⁹ moles of Si, 143.7 moles of CCl₄, 3.49x10²⁴ atoms

Explanation:

These is the relation:

NA (6.02x10²³) ⇒ 1 mol of particles (it can be, atoms or molecules)

This are the rule of three:

NA of atoms occupies 1 mol of Si

1.27x10¹⁵ atoms will occupy (1.27x10¹⁵  .1 ) / NA = 2.10x10⁻⁹ moles of Si

NA of molecules are contained in 1 mol of CCl₄

8.65x10²⁵ molecules are contained in (8.65x10²⁵  .1)/ NA = 143.7 moles

1 mol of Ca has NA atoms

5.80 moles of Ca will have (5.80 . NA) = 3.49x10²⁴

5 0
3 years ago
Canadian chemists have developed a modern variation of the 1899 Mond process for preparing extremely pure metallic nickel. A sam
Gnoma [55]

There are 1952.31g of nickel can be converted to the carbonyl with 3.55 m³ of CO at 100.7 kPa.

Given data

The reaction can be written as:

Ni+4CO ⟶Ni(CO)_{4}

V(CO)=3.55m^{3}

T=50°C=323.5K

p=100700Pa

Now, use the formula:

pV=nR*T  

Where, P is pressure, V is volume and T is temperature.                         n=p∗V / R∗T

n=100700∗3.55  / 8.314∗323.15

It is known that,

n(CO)=133.059mol                            

n(Ni)=n(CO)/4=33.26mol

Mass can be determined by the formula:

Mole = mass / molar mass

Now, put the value of given data in above formula:

m(Ni)=nAr=33.26mol/58.69g/mol      

m(Ni)=1952.31g

To know more about carbonyl here

brainly.com/question/22211758

#SPJ4

3 0
2 years ago
Two groups of seventh graders were tested to compare thwir speed solving integer problems. One group had calculators, the others
guapka [62]

Answer:

control is calculators independant is without them

Explanation:

8 0
3 years ago
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5. What is another name for a long trench created by rising heat
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I think its Ocean trench, not sure tho.

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3 years ago
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