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KengaRu [80]
2 years ago
13

Which property of sodium is not typical of a metal

Chemistry
1 answer:
MakcuM [25]2 years ago
8 0

Answer:

It's a soft metal, reactive and with a low melting point, with a relative density of 0,97 at 20ºC (68ºF)

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Q #13 How many moles of MgCl2 are there in 350. g of compound?
Vaselesa [24]

<u>Answer:</u>

3.67 moles

<u>Step-by-step explanation:</u>

We need to find out the number of MgCl_2 moles present in 350 grams of a compound.

Molar mass of Mg = 24.305

Molar mass of Cl_2 = 35.453

So, one mole of MgCl_2 = 24.305 + (35.453 * 2) = 95.211g

1 Mole in 1 molecule of MgCl_2 = \frac{1}{95.211} = 0.0105

Therefore, number of moles in 350 grams of compound = 0.0105 * 350

= 3.67 moles



8 0
3 years ago
1. Define anthracite.<br>​
faltersainse [42]

Answer:

a hard natural coal of high luster differing from bituminous coal in containing little volatile matter and in burning very cleanly is called anthracite  . called also hard coal

Explanation:

Answer from Gauth math

6 0
2 years ago
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The equilibrium expression for a reaction is Keq=[H+]6[Bi2+]2[H2S]3. Which of the following could be the reaction? A. 6H+(aq) +
Bezzdna [24]
So the question ask to calculate the equilibrium and ask on which of the following choices is the possible reaction and based on my calculation and the use of the formula i came up with an answer of letter B. I hope you are satisfied with my answer and feel free to ask for more. 
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3 years ago
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What is the wavelength of a wave having a frequency of 2500 Hz
Lemur [1.5K]
We will assume that the wave is moving in free space, thus, the velocity of the wave would be equal to the speed of light = 3 * 10^8 meters/sec

The velocity of the wave can be calculated using the following rule:
velocity = frequency * wavelength where:
velocity = 3 * 10^8 m/sec
frequency = 2500 Hz
wavelength is the unknown that we want to calculate.

Substitute with the givens in the above equation to get the wavelength as follows:
3 * 10^8 = 2500*wavelength
wavelength = 120 * 10^3 meters
5 0
3 years ago
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given the balanced equation representing a reaction: 2H2 O2 = 2H2O, what is the total mass of water formed when 8 grams of hydro
Vadim26 [7]
The reaction equation represents the mole number ratio. So the hydrogen is 8/2=4 mol. Oxygen is 64/32=2 mol. So the water is 4 mol. The mass of water is 4*18=72 g. Or if it is confirmed that they are completely reacted. You can simply add them up.
3 0
3 years ago
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