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kvasek [131]
2 years ago
10

What is the molecular mass of Br 2?

Chemistry
2 answers:
Andrews [41]2 years ago
4 0

Answer:

159.80 g/mol

Explanation:

79.90×2=159.80g/mol

Kazeer [188]2 years ago
3 0

Answer:

159.808 g/mol

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Why can baking soda be used to put out fires? (2 reasons)
balandron [24]
It is not a really good flammable object to use for fires.
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8 0
3 years ago
What is the density of an object that has a mass of 21 g and a volume of 9 ml?
mylen [45]

The formula is density = mass / Volume

density = ?

mass = 21 g

Volume = 9 mL

d = m / V

d = 21 g / 9 mL

d = 2.3 g/mL

Hope this help!


5 0
3 years ago
Pls help me <br> brainliest, rattings etc<br> its 2 questions and I am very confused!<br> 8 pts!
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6 0
3 years ago
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Which of the following will dissolve most quickly? A. two sugar cubes. . B. a tablespoon of coarse sugar. . C. a tablespoon of t
Dimas [21]
The one that will dissolve most quickly is : D. a tablespoon of ultrafine sugar

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hope this helps
3 0
3 years ago
Read 2 more answers
How to find how many electrons are in an element
Murljashka [212]

Explanation:

1) Locate the atomic number in the upper left corner of the square. The atomic number will tell you the number of protons

2) In a neutral state, the element will contain the same number of protons as it will electrons.

--> Boron (B) has an atomic number of 5, so it has 5 protons.

--> Having 5 protons (+1 charge each) means to be balanced, it must have 5 electrons (-1 charge each)

However, what if it's not in a neutral state?

If it's not in a neutral state, it will look something like this:

Ca ^ 2+

<em>Btw, the "^" means that it will be written like it's an exponent. That confuses people sometimes.</em>

Anyways, the "2+" means it's an ion with a positive charge of 2. For us to have a positive charge, it means it's lost two electrons (cause electrons are negative, so taking them away means we are left with a more positive charge).

To get the number of remaining electrons, subtract the 2 from the atomic mass. In this case, that would be 20.

20 - 2 = 18 electrons

Another example:

N ^3-

Atomic Number: 7

7 + 3 = 10 electrons.

Why did I add here instead of subtracting? It's cause the 3- means we have added electrons, resulting in the ion having a negative charge. It's got more electrons than usual.

Hopefully this helps a bit.

5 0
3 years ago
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