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Whitepunk [10]
2 years ago
9

• Qual a diferença entre o etanol 60%, 70% e 90%?

Chemistry
1 answer:
lyudmila [28]2 years ago
6 0

Lo siento pero no puedo ayudarte.

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Calculate the molarity of 1.60L of a solution containing 1.55g of dissolved KBr
Olegator [25]

Answer: the molarity is .00814

Explanation:the formula for molarity is moles over liters but we have grams so we do given over one so 1.55 over 1 multiplied by 1/119.0023 which is tht two atomc masses addes together then you get the moles and divde them by the liters to get the molarity hope this helps god bless

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2 years ago
When light hits the Earth at a greater angle, what does this cause?​
crimeas [40]
Angle of Solar Radiation and Temperature
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2 years ago
If an element has an atomic number of 20 and a mass number of 41, what is the :
iVinArrow [24]

Answer:

20 protons, 20 electrons, and 21 neutrons

Explanation:

The atomic number of an atom is the number of protons it has. If the atomic number is 20 then we know the atom has 20 protons.

•The mass number of an atom is the total number of protons and neutrons the atom contains. The mass number is 41 and the number of protons is 20, just subtract 20 from 41 and you will get the number of neutrons: 41 - 20= 21. The atoms has 21 neutrons.

•The number of electrons found in an atom is equal to the number of protons. The atoms has 20 protons which means it has 20 electrons.

So, the answer is:

20 protons, 20 electrons, and 21 neutrons

8 0
3 years ago
Which of the following will have the slowest rate of diffusion at a given temperature?
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so as mass of the particle increases, diffusion decreases !
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