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Sonja [21]
2 years ago
15

Express the following in scientific notation: 1. 158000 km 2. 0.000009782 L

Chemistry
1 answer:
slamgirl [31]2 years ago
6 0

Answer:

1.58x10^5km

9.782x10^-6

Explanation:

Please Brainlist

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A current of 5. 68 a is passed through a Fe(NO3)2 solution. How long, in hours, would this current have to be applied to plate o
daser333 [38]

There are  1.2 hr would this current have to be applied to plate out 7. 20 g of iron .

Calculation ,

Given ; Current ( I ) = 5. 68 A

In Fe(NO_{3} )_{2} , the valancy of Fe is +2 .

2 moles of e^{-} are required for the decomposition of 1 mole of Fe .

7. 20 g  of Fe in moles  = 7. 20 g /55.845 g/mol =0.12 mole

x moles of  e^{-} are required for the decomposition of 0.128 mole of Fe .

moles of   e^{-} are required = 0.256 moles

Charge on 1 mole  of   e^{-} = 96500 C

Charge on 0.256  mole  of   e^{-} = 24704 C

Current ( I )= Q/t  

t =Q / I = 24704 C/5. 68 A = 4349 sec = 1.2 hr

Therefore , there are  1.2 hr would this current have to be applied to plate out 7. 20 g of iron .

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8 0
1 year ago
In order to rinse the system of exhaled C02 and meet the inspiratory flow rate requirements of infants placed on B-CPAP, the flo
LuckyWell [14K]

Answer:

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Bubble CPAP is a non-invasive, external ventilation technique used for newborn babies with infant respiratory distress syndrome (IRDS). Continuous positive airway pressure (CPAP) is given to a spontaneously breathing newborn baby to preserve lung volumes during expiration

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Oduvanchick [21]

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A chemical reaction takes place in which energy is absorbed arrange the characteristics of the reaction in order from start to f
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<span>A chemical reaction in which energy is absorbed is known as an endothermic reaction. The characteristics of the reaction in order from start to finish is as follows:

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2. Transition state
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This implies that in an endothermic reaction, </span><span>the products are less stable than the reactants.</span>
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You removed a Coke can from the refrigerator. When you come back a few minutes later, you realize the can has begun to "sweat".
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