Question

2. Name any two techniques that you use at home to separate a mixture and explain the
one.
3. Suppose you were given two samples of a compound/substance A and B for your cher
experiment. How would you know that chemical reaction has taken place?
4. Calculate the molar mass of the given substance
a) H2SO4
b) KMnO4
5. Atoms of most elements are not able to exist independently. However, atoms of few
exist independently. Name any two atoms of such elements and briefly explain how
independently,
5. In cities, drinking water is supplied from water works. A flow diagram of a typical wa
given below. Write down the various steps involved to get the drinking water to you
water works.
Toot
To low solids
To sediment the
suspended
impurities
Fine sand
Water
Crevet av
Sedimentation
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Piration tank​

Answer 1

Answer:

2.Separating funnel.

Chromatography.

3.The following can indicate that a chemical change has taken place, although this evidence is not conclusive: Change of odor. Change of color (for example, silver to reddish-brown when iron rusts). Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat.

4.158.034 g/mol

Potassium permanganate/Molar mass

a.Given the formula for potassium permanganate, KMnO4, its constituent elements are potassium (K), manganese (Mn), and oxygen (O). The formula indicates that there is 1 mole K, 1 mole Mn, and 4 moles O per mole of KMnO4.

b.Copper(II) nitrate, Cu(NO3)2, is an inorganic compound that forms a blue crystalline solid. ... Copper nitrate also occurs as five different hydrates, the most common ones being the trihydrate and hexahydrate.

5.Atom is reactive and it has property to react or combined with each other or another atom of other E L E M E N T . it can take part in chemical reaction so it never can exists in nature.. independently … How do atoms know how to become an element?