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ElenaW [278]
3 years ago
5

Help plz this was due 2 days ago but I don’t understand it at all

Chemistry
2 answers:
Bumek [7]3 years ago
8 0

Answer:

4 mile : 253440 inches

0.004 grams : 1.814 grams

56 miles/hour : 82.133 feet per second

4.5 ml : 0.45 centilitre

34.g/ml : 74.9571691 lb/liter

30 lb: 480 ounces

ArbitrLikvidat [17]3 years ago
5 0
You are doing conversion factors on this one so for example in problem 1:

4.0 miles x ( 5280 ft / 1mile ) x ( 12 inches / 1 foot ) = 253440 inches
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Answer: balanced chemical equation: Ba(NO_3)_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)+2NaNO_3(aq)

Net ionic equation : Ba^{2+}(aq)+SO_4^{2-}(aq)\rightarrow BaSO_4(s)

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The balanced chemical equation is:

Ba(NO_3)_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)+2NaNO_3(aq)

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

Ba^{2+}(aq)+2NO_3^-(aq)+2Na^+(aq)+SO_4^{2-}(aq)\rightarrow  BaSO_4(s)+2Na^+(aq)+2NO_3^-(aq)

The ions which are present on both the sides of the equation are sodium and nitrate ions and hence are not involved in net ionic equation.

Hence, the net ionic equation is Ba^{2+}(aq)+SO_4^{2-}(aq)\rightarrow BaSO_4(s)

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