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aleksley [76]
2 years ago
12

A sample of an unknown substance has a mass of 0.465 kg. If 3,000.0 J of heat is required to heat the substance from 50.0°C to 1

00.0°C, what is the specific heat of the substance? Use mc008-1.jpg. 0.00775 J/(gi°C) 0.0600 J/(gi°C) 0.129 J/(gi°C) 0.155 J/(gi°C)
Chemistry
2 answers:
Aleksandr-060686 [28]2 years ago
5 0

Answer : Option C) 0.129 J/g°C

Explanation : The given information has about Q which is heat energy (3,000 J);

m is the mass of a substance (0.465 kg);

∆T is the measure for the change in temperature (100 - 50) = 50°C;

To find the specific heat of the given unknown substance, we have to use the formula as;

q = m x C x ∆T; where c is the specific heat;

So, substituting the above values in this equation we get;

C = q/ (m x ∆T)

Therefore, it will be C = 3000 / (0.465 X 50) = 129.0 J/Kg°C

But we want the answer in grams, not in kilograms;

So, it will be 129.0 / 1000 = 0.129 J/g°C

Therefore, the specific heat of the unknown substance is 0.129 J/g°C

White raven [17]2 years ago
3 0

Answer:

C on edge

Explanation:

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andreev551 [17]

The average atomic mass of the imaginary element : 47.255 amu

<h3>Further explanation  </h3>

The elements in nature have several types of isotopes  

Isotopes are elements that have the same Atomic Number (Proton)  

Atomic mass is the average atomic mass of all its isotopes  

Mass atom X = mass isotope 1 . % + mass isotope 2.% ..

isotope E-47 47.011 amu, 87.34%

isotope E-48 48.008 amu, 6.895

isotope E-49 50.009 amu, 5.77%

The average atomic mass :

\tt avg~mass=0.8734\times 47.011+0.06895\times 48.008+0.0577\times 50.009\\\\avg~mass=41.059+3.310+2.886\\\\avg~mass=47.255~amu

5 0
2 years ago
Why do crystals form during crystallisation
Mazyrski [523]

Answer: Crystallization is a technique which chemists use to purify solid compounds. Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. The process is based on the principles of solubility: compounds (solutes) tend to be more soluble in hot liquids (solvents) than they are in cold liquids. If a saturated hot solution is allowed to <u>cool</u>, the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration.
For an example the salt we get from seawater can have many impurities in it. Hence, the process of crystallization is in use to remove these impurities.

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   hope it helped
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3 0
2 years ago
Read 2 more answers
For below checmical equation (which may or may not be balanced), list the number of each type of atom on each side of the equati
Olegator [25]

Answer:

Left hand side:-

Carbon - 12

HYdrogen - 28

Oxygen - 38

Right hand side:-

Carbon - 12

Hydrogen - 28

Oxygen - 38

Since, the number of atoms each side are equal, the reaction is balanced.

Explanation:

The given reaction is:-

2C_6H_{14}_{(l)}+19O_2_{(g)}\rightarrow 12CO_2_{(g)}+14H_2O_{(g)}

Left hand side:-

Carbon - 12

HYdrogen - 28

Oxygen - 38

Right hand side:-

Carbon - 12

Hydrogen - 28

Oxygen - 38

<u>Since, the number of atoms each side are equal, the reaction is balanced.</u>

5 0
2 years ago
3. How can a community help implement Ecological Solid Waste Management.
Setler79 [48]

Answer:

It help cause we compost food scraps and other organic wastes. We also reuse and recycle materials to organize for government and industry to develop community recycling materials.

It depend on your opinion as a student.

Explanation:

Hope it helps

4 0
2 years ago
For question numbers 1 and 2, two statements are given - one labelled
Svetllana [295]

Answer:

(iv) (A) is false, but (R) is true.

Explanation:

It is not true that carbon has a strong tendency to either lose or gain electrons to attain noble gas configuration. Carbon is a member of group 14, it is the first member of the group and carbon is purely a non metal. Only metals metals can loose electrons to attain the noble gas configuration. Moreover, carbon does not participate in ionic bonding so it does not gain electrons to attain the noble gas configuration.

However, carbon participates in covalent bonding where it is covalently bonded to four other chemical species using its four outermost electrons. Carbon forms covalent bonds in which four electrons are shared with other chemical species.

5 0
3 years ago
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