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Jobisdone [24]
3 years ago
10

Chemicals that cause cancer or called

Chemistry
1 answer:
Tpy6a [65]3 years ago
5 0
They are called carcinogens
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What is the atomic number of the yet-undiscovered element directly below francium ( Fr) in the periodic table?
kakasveta [241]
The atomic number of Francium is 87.
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3 years ago
One mole of any gas has a volume of 24 dm3 or 24,000 cm3 at r.t.p .
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Are these exo/endothermic
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The molarity of a solution prepared by dissolving 17.0 g of hydrochloric acid (HCl (aq)) in 133 mL of water is ___ M (2 decimal
Lera25 [3.4K]

The molarity is 3.50 M/L.

Explanation:

Molarity is found to know the amount of the solute ions present in the given volume of solution. So we determine it using the ratio of the moles of solute to the volume of the solution.

As here the weight of the solute which is hydrochloric acid is given as 17g, so we need to find the moles of it. This can be done by dividing the given amount of HCl with the molecular weight of HCl.

Molecular weight of HCl = 1.01 + 35.45 = 36.46 g/mol

So the number of moles of HCl present here will be

No.of moles = \frac{17}{36.46} =0.466

So, 0.466 moles of HCl is present in the solution.

Molarity = \frac{No.of moles of solute}{Volume of solution} = \frac{0.466}{133*10^{-3} }

Molarity = 3.50 M/L

Thus, the molarity is 3.50 M/L.

7 0
4 years ago
Who arranged the elements according to atomic mass and used the arrangement to predict the properties of missing element?
Marina CMI [18]

Answer:

Dmitri Mendeleev

Explanation:

Dmitri Mendeleev a Russian Chemist arranged elements on the periodic table according to their atomic mass. He used this arrangement to predict some of the properties of the missing element.

  • Dmitri Mendeleev around 1869 described the periodic table.
  • The table was based on the periodic law which states that "chemical properties of elements are a periodic function of their atomic weights".
  • In the Mendeleev table, elements are arranged by atomic weights with recurring properties in a periodic manner.
3 0
3 years ago
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