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Temka [501]
3 years ago
13

Which statement best describes what a scientist is

Chemistry
1 answer:
Alik [6]3 years ago
4 0

the answer is the nature of science

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Which type of chemistry studies the chemical reactions that occur in the human body?
vladimir1956 [14]

Answer:

Which type of chemistry studies the chemical reactions that occur in the human body? .

biochemistry

4 0
2 years ago
Why are significant figures NOT important when solving problems in your math class?
Alex Ar [27]
They're not important when solving math problems in class because you need to get the correct and accurate answers hence don't need to change them into significant figures
4 0
3 years ago
A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing point depression of
sergij07 [2.7K]
From the equation; ΔTf = Kf × m
Where, Kf for water = 1.853 K kg/mole; m is the molarity = number of solute/amount of solvent in kg.
Glucose is the solute whose molecular mass is 180 g/mole and water is the solvent. 
Moles of solute = 15.5/180 = 0.0861 moles
Amount of solvent in kg = 245/1000 = 0.245 Kg
Therefore; molarity = 0.0861/0.245 = 0.3515 moles/Kg
Therefore; ΔTf = 1.853 × 0.3515 = 0.6513 K
Hence; the depression in freezing point is 0.6513 
The freezing point of solution will therefore be;
= 273 - 0.6513 = 272.3487 K

7 0
3 years ago
Give a chemical formula for the compound formed when sulfur dioxide reacts with water
zavuch27 [327]
When sulfur dioxide reacts with water , the product is called sulphurous acid, H2SO3. The balanced equation is expressed in the following manner : SO2  + H2O = H2SO3. There is a one mole to one mole ratio between any of the reactants to product, sulphurous acid. 
6 0
2 years ago
To name the compound written as CuCl2, you would write:
vovangra [49]

Answer: option C. Copper (II) chloride

Explanation:

To name CuCl2, we need to know the oxidation state of Cu in the compound as chlorine always have oxidation on —1 in all its compound. The oxidation state of Cu can be calculated as follows:

Cu + 2Cl = 0 (since the compound has no charge)

Cl = —1

Cu + 2(—1) = 0

Cu —2 = 0

Collect like terms

Cu = 0 +2

Cu = +2

Therefore, the oxidation state of Cu in CuCl2 is +2.

The name of the compound will be copper(ii) chloride, since cupper has oxidation state +2 in the compound.

4 0
3 years ago
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