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4 years ago

What type of science is chemistry?

Chemistry

2 answers:

d1i1m1o1n [39]4 years ago

6 0

Answer:

It is learning about chemical reactions. In chemistry you learn about the elements of the periodic table and how reactive they are.

Explanation:

PLEASE MARK ME THE BRAINLIEST :D!!

KonstantinChe [14]4 years ago

6 0

Answer:

physical science

Explanation:

because it touches all other natural sciences. biology,physics, etc. it is known as the central science:)

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Considering particles at the subatomic level, carrying out this experiment would help to identify the metals given that: Ca has

svet-max [94.6K]

Answer:

we can do it again and again and again and again and again and again

4 0

3 years ago

How much energy is released by the decay of 3 grams of 230Th in the following reaction 230 Th - 226Ra + "He (230 Th = 229.9837 g

Serhud [2]

<u>Answer:</u> The energy released for the decay of 3 grams of 230-Thorium is $2.728\times 10^{-15}J$

<u>Explanation:</u>

First we have to calculate the mass defect $(\Delta m)$ .

The equation for the alpha decay of thorium nucleus follows:

$_{90}^{230}\textrm{Th}\rightarrow _{88}^{226}\textrm{Ra}+_2^{4}\textrm{He}$

To calculate the mass defect, we use the equation:

Mass defect = Sum of mass of product - Sum of mass of reactant

$\Delta m=(m_{Ra}+m_{He})-(m_{Th})$

$\Delta m=(225.9771+4.008)-(229.9837)=1.4\times 10^{-3}amu=2.324\times 10^{-30}kg$

(Conversion factor: $1amu=1.66\times 10^{-27}kg$ )

To calculate the energy released, we use Einstein equation, which is:

$E=\Delta mc^2$

$E=(2.324\times 10^{-30}kg)\times (3\times 10^8m/s)^2$

$E=2.0916\times 10^{-13}J$

The energy released for 230 grams of decay of thorium is $2.0916\times 10^{-13}J$

We need to calculate the energy released for the decay of 3 grams of thorium. By applying unitary method, we get:

As, 230 grams of Th release energy of = $2.0916\times 10^{-13}J$

Then, 3 grams of Th will release energy of = $\frac{2.0916\times 10^{-13}}{230}\times 3=2.728\times 10^{-15}J$

Hence, the energy released for the decay of 3 grams of 230-Thorium is $2.728\times 10^{-15}J$

5 0

3 years ago

When does the dipole arrow point to Atom A? (Use electronegativity in your explanation)

Marrrta [24]

Answer:

Dipole, less electronegativity, higher electronegativity

8 0

3 years ago

Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece

Taya2010 [7]

Answer:

The correct answer is B has a neutral pH

Explanation:

we all know that acid converts blue litmus to red on the other hand base converts red litmus paper to blue.

According to the question the blue litmus paper does not change its colour or it stays blue that means the pH of solution is neutral or7 which prevent the colour change of the litmus paper.

If the solution was acidic then the blue litmus paper changes into red .

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3 years ago

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Viefleur [7K]

Answer: time

Explanation: hi

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3 years ago