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bezimeni [28]
3 years ago
7

A 1.0 kg object absorbs 1,303 J of heat energy and experiences a temperature increase of 5.2∘C. What is the object’s specific he

at, in joules per gram-degree celsius? Report your answer with the correct number of significant figures.
Chemistry
2 answers:
KATRIN_1 [288]3 years ago
8 0

Answer:

0.25

Explanation:

konstantin123 [22]3 years ago
5 0

Answer:

c = 250.58 J/kg/^{0}C

Explanation:

The specific heat of a substance is the required quantity of heat to increase or decrease the temperature of its unit mas by 1 kelvin.

Q = mcΔθ

where: Q is the quantity of heat absorbed or released, m is the mass of the substance, c is its specific heat and Δθ is the change in temperature of the substance.

Given that; m = 1.0 kg, Q = 1303 J and Δθ = 5.2 ^{0}C, then;

c = Q ÷ (mΔθ)

  = 1303 ÷ (1.0 × 5.2)

  = 1303 ÷ 5.2

  = 250.58 J/kg/^{0}C

The specific heat of the object is 250.58 J/kg/^{0}C.

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John finds a rock that contains large, light-colored mineral crystals. the rock shows no sign of being altered by heat or pressu
cupoosta [38]

From the above statement, John can infer that the rock underwent metamorphism and also is not altered by heat or pressure.

<u>Explanation</u>:

  • Metamorphic rock is an igneous sedimentary rock and although when put through heat the rock becomes hot but does not alter its shape or melt. If the rock melts then it is only an igneous rock and not a sedimentary one.
  • During metamorphism, the chemical and the mineral content of prolith are changed due to changes in the environment based on physical and chemical conditions.
  • Even though the rocks remain solid, fluid is present between the macroscopic spaces.
  • This gives "The Geologist" accurate information of what happens beneath the earth during the formation of mountains.
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4 0
3 years ago
How many oxygen atoms are present in 4.28 g of LiBroz sample?
Dafna11 [192]

Answer:

0.43×10²³ atoms

Explanation:

Given data:

Mass of LiBrO₂ = 4.28 g

Number of atoms of oxygen = ?

Solution:

Number of moles = mass/molar mass

Number of moles = 4.28 g/ 118.84 g/mol

Number of moles = 0.036 mol

We can see 1 mole of LiBrO₂ contain 2 mole of oxygen atm.

0.036 mol × 2 = 0.072 mol

1 mole contain 6.022×10²³ atoms

0.072 mol × 6.022×10²³ atoms / 1mol

0.43×10²³ atoms

3 0
3 years ago
In general, when the addition of an unsymmetrical electrophilic reagent to an unsymmetrical alkene forms the product predicted b
Tju [1.3M]

It is formed via the more/most stable carbocation.

What justification exists for Markovnikov's Rule?

A carbocation is created as a result of the protonation of the alkene by the protic acid. The carbocation that has the most alkyl substituents on its carbon holds the positive charge, making it the most stable carbocation. As a result, the addition of the halide to the carbon that has fewer hydrogen substituents makes up the majority of the product.

Markovnikov's rule

According to the Markovnikov rule, a proton is added to the carbon atom with the greatest number of hydrogen atoms connected in addition to processes involving alkenes or alkynes.

Anti-Markovnikov Rule

According to the Anti-Markovnikov Rule, in addition to reactions between alkenes or alkynes, The carbon atom with the fewest hydrogen atoms linked to it receives the proton.

Learn more about Carbocation here:-

brainly.com/question/14363695

#SPJ4

7 0
2 years ago
QUESTION 1<br> Sugar is blank meaning it can readily absorb moisture.
Alecsey [184]

Answer:

sugar is hygroscopic

Explanation:

sugar is hygroscopic

5 0
1 year ago
____ Is the use of sound waves to detect and measure objects under water
GarryVolchara [31]
It is A sonar they use sound frequencies to bounce sound off say the ocean floor and when the sound wave returns it gives an image of whatever it bounced off of 
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