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babymother [125]
3 years ago
11

Im named after the person who created the 1st periodic table. Who am i ?

Chemistry
1 answer:
icang [17]3 years ago
7 0
I think it's dimitri
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Which of the following statements is true?
Darya [45]
B. The nucleus of an atom contains protons and neutrons.
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3 years ago
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(?) NH4NO3 ---> (?) N2O + (?) H2O
miskamm [114]

Answer:

NH4NO3 -> N2O + 2H2O

Explanation:

6 0
3 years ago
_________ heat is the amount of heat required to change the temperature of 1 gram of a substance by 1 degree Celsius​
Vlada [557]

Answer:

<u>Specific heat capacity</u> is the amount of heat required to change the temperature of 1 gram of a substance by 1 degree Celsius​

Explanation:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

The substances with higher value of specific heat capacity require more heat to raise the temperature by one degree as compared the substances having low value of specific heat capacity.For example,

The specific heat capacity of oil is 1.57 j/g. K and for water is 4.18 j/g.K. So, water take a time to increase its temperature by one degree by absorbing more heat while oil will heat up faster by absorbing less amount of heat.

Consider that both oil and water have same mass of 5g and change in temperature is 15 K. Thus amount of heat thy absorbed to raise the temperature is,

For oil:

Q = m.c. ΔT

Q = 5 g× 1.67 j/g K × 15 K

Q = 125.25 j

For water:

Q = m.c. ΔT

Q = 5 g× 4.18 j/g K × 15 K

Q = 313.5 j

we can observe that water require more heat which is 313.5 j to increase its temperature.

8 0
3 years ago
Suppose an aqueous mixture is prepared containing magnesium sulfate (mgso4), copper(ii) sulfate (cuso4), metallic magnesium, and
ANEK [815]
<span>The copper will disengage from the sulfate and become evident in the aqueous solution, leading to greater uptake of sulfate by the metallic magnesium. This will lead to the creation of greater copper isolated.</span>
3 0
3 years ago
Work = Force X Distance A dog pulls a ball with 5N of force for 4 m. How
Evgesh-ka [11]

Answer:

W = 20 J

Explanation:

Given that,

The force acting on the dog, F = 5 N

Distance covered, d = 4 m

We need to find the work done by the dog. The work done by an object is given by :

W = Fd

Put all the values,

W = 5 N × 4 m

W = 20 J

So, 20 J of work is done by the dog.

7 0
2 years ago
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