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stich3 [128]
1 year ago
12

Convert the following measurement

Chemistry
1 answer:
KiRa [710]1 year ago
6 0

Answer:

9.9 x 10^-2 g*cm²/s²

Explanation:

9.9 × 10^-9 kg*m²/s² =    g*cm²/s²

1 kg*m²/s² = 1 joule(s)

1 g*cm²/s² = 1 erg(s)

britannica

1 kg = 1000g = 1x10^3 g

1 m²= 10000 cm² = 1x10^4 cm²

add the exponents 3 and 4 which = 7

-9 + 7 = -2

9.9 × 10^-9 kg*m²/s² = 9.9 x 10^-2 g*cm²/s²

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2KI(aq)+Pb(NO_3)_2(aq)\rightarrow 2KNO_3(aq)+PbI_2(s)

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Explanation :

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.

Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations.

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When potassium iodide react with lead nitrate then it gives potassium nitrate and lead iodide as a product.

The full balanced ionic equation will be,

2KI(aq)+Pb(NO_3)_2(aq)\rightarrow 2KNO_3(aq)+PbI_2(s)

The ionic equation in separated aqueous solution will be,

2K^+(aq)+2I^{-}(aq)+Pb^{2+}(aq)+2NO_3^{-}(aq)\rightarrow PbI_2(s)+2K^+(aq)+2NO_3^{-}(aq)

In this equation, K^+\text{ and }NO_3^- are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

Pb^{2+}(aq)+2I^{-}(aq)\rightarrow PbI_2(s)

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