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Art [367]
3 years ago
9

A weight of 0.27 kilogram is 1. 0.00027 mg 2. 270 mg 3. 27 mg 4. 2.7 × 105 mg

Chemistry
1 answer:
julia-pushkina [17]3 years ago
8 0
The answer is:  4)  " 2.7 * 10⁵  mg "   .
________________________________________________________
Explanation:
________________________________________________________
Since all answer choices given are in "mg" ("milligrams");  we need to convert our given value, "0.27 kg" ("kilograms") to "mg" ("milligrams").
________________________________________________________
Note the following "exact value" conversions:
________________________________________________________
 1000 mg = 1 g ;
   1000 g = 1 kg. 

(0.27 kg) (1000 g / 1 kg) (1000 mg/1 g) = __?__ mg ;
_____________________________________________________
 The units of "kg", and "g" cancel to "1" and we are left with:
________________________________________________
0.27 * 1000 * 1000  mg  = 270,000 mg =  2.7 * 10<span>⁵ </span> mg ; which is:
_______________________________________________________
                                                               → Answer choice: # 4  .
_______________________________________________________
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How many moles of na contain 7.88x1021 atoms of na
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8. A 220 mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275K. The piston
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The sample has a new pressure of 274kPa. If at 105 kPa and 275K, a 220 mL sample of helium gas is contained in a cylinder with a moving piston. The sample is pushed till it has a 95.0 mL volume and 310K .

The macroscopic characteristics of ideal gases are related by the ideal gas law (PV = nRT). A gas is considered to be perfect if its particles (a) do not interact with one another and (b) occupy no space (have no volume). Where P= pressure  V= volume and T = temperature.

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To know more about Ideas gas equation

brainly.com/question/28837405

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