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Nata [24]
3 years ago
7

Hey, anyone got discord? I'm new to discord. Add me Smile#4741​

Chemistry
2 answers:
baherus [9]3 years ago
8 0

me

pls work list for you and your business and I can say poop and you will be a moon

Elena-2011 [213]3 years ago
6 0

Answer:

oky

Explanation:

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Calculate the energy required to heat of 1.50 kg iron from -7.8 C to 15.0 C . Assume the specific heat capacity of silver under
Leni [432]

Answer : The energy required to heat of 1.50 kg iron is, 1.5\times 10^4J

Explanation :

Formula used :

Q=m\times c\times \Delta T

or,

Q=m\times c\times (T_2-T_1)

where,

Q = heat required = ?

m = mass of iron = 1.50 kg  = 1500 g

c = specific heat of iron = 0.450J/g^oC

T_1 = initial temperature  = -7.8^oC

T_2 = final temperature  = 15.0^oC

Now put all the given value in the above formula, we get:

Q=1500g\times 0.450J/g^oC\times (15.0-(-7.8))^oC

Q=15390J=1.5\times 10^4J

Therefore, the energy required to heat of 1.50 kg iron is, 1.5\times 10^4J

6 0
3 years ago
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Classify each of the following substances as a compound or element.
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Answer:

A. Element

B. Compound

C. Compound

D. Element

E. Compound

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Elements are what is already on the periodic table and compounds are the substances created when they are combined.

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2 years ago
A particular isotope of uranium has a nucleus with 92 protons and 143 neutrons identify this isotope in two diffrent ways
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Isotopes can represented in two ways. In the first way, the element's symbol is used with mass number at the upper left and atomic number written on the lower left of the symbol. In the other form of representation, the isotope name is written with a dash and mass number.

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The isotope has 143 neutrons

So the mass number = Total number of protons + Neutrons

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Therefore, the two ways of representing the isotope is:

1. ^{235}_{92} U

2. Uranium-235

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Which would form positive ions "glued" together by a sea of valence electrons?
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Chemical bonds hope this helps<span>
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