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Kobotan [32]
3 years ago
15

What is it called when an element has 2 little numbers on top of each other on the left of the element?

Chemistry
1 answer:
Maru [420]3 years ago
5 0
_{n}^{m} A \\ \\ If\ we\ have\ an\ element\ A,\ then\ n\  is\ an\ atomic\ number, \\ \\ and\ m \ is\ a\ mass\ number.

Atomic number shows the number of protons, and charge of the nucleus.
Mass number shows sum of the number proton and neurons in the nucleus.
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What color are the universal indicators for: HCl, Na3CO3, NaOH, H20
Ierofanga [76]
HCl - Red (strong acid)
Na_{2} CO_{3} - Blue (weak base)
NaOH - Purple (strong base)
H_{2} O - Green (neutral)
7 0
3 years ago
A sample of metal has a mass of 23.04 g, and a volume of 5.31 ml. what is the density of this metal?
bija089 [108]
4.33898305 is the density
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5 0
3 years ago
Magnesium chloride, MgCl2, is an important industrial chemical.
gavmur [86]

This problem is providing information about a reaction between magnesium and hydrochloric acid. However, the moles of the latter are required given 50 cm³ of a 0.2-M solution, making this problem more about the application of molarity. At the end, the answer turns out to be 0.01 mol.

<h3>Molarity:</h3>

In chemistry, we use units of concentration in order to represent the relative amounts of solute and solvent in a solution. More specifically, molarity relates the moles of the solute with the liters of solution according to:

M=\frac{n}{V}

Thus, since this problem asks for the moles of hydrochloric acid in 50 cm³ of a 0.2-M solution, we must first calculate the volume in liters with:

V=50cm^3*\frac{1L}{1000cm^3} =0.050L

To finally solve for n, moles, to obtain:

0.2mol/L=\frac{n}{0.05L} \\\\n=0.2mol/L*0.05L\\\\n=0.01mol

Learn more about molarity: brainly.com/question/9468209

8 0
3 years ago
1.50μm2. Convert this to square meters.
nignag [31]
1μ = 10^{-6}.
Therefore, 1.5μ = 1.5 x 10^{-6} m ^{2}.

Hope this helps, have a great day ahead!

4 0
4 years ago
Why does hexane have the weakest intermolecular force?
Svetllana [295]

Answer:

The only intermolecular forces present in the compound Hexane are London dispersion forces which are generally the weakest. Hexane's molecular structure proves that Dipole-Dipole forces wont exist as there aren't very polar bonds in the structure.

4 0
3 years ago
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