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Sliva [168]
2 years ago
10

Write the following numbers in scientific notation: a) 0.0006730 b)50000.0 c)0.000003010 d) 132.40 e)2232​

Chemistry
2 answers:
zimovet [89]2 years ago
8 0

Answer:

a) 0.0006730:6.73×10^-4

b)50000.0 =5×10^4

c)0.000003010 =3.01×10^-6

d) 132.40 =1.32×10²

e)2232=2.232×10³

Firdavs [7]2 years ago
3 0

Answer:

a)6.730×10⁻⁴

b)5×10⁴

c)3.010×10⁻⁶

d)1.3240×10²

e)2.232×10³

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The zinc within a copper-plated penny will dissolve in hydrochloric acid if the copper coating is filed down in several spots (s
Mrac [35]

Answer:

Mass of hydrogen gas evolved is 0.0749 grams.

Explanation:

Total pressure of the gases = p = 758 mmHg

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Pressure of hydrogen gas ,P =  p - 23.78 mmHg = 758 mmHg - 23.78 mmHg

P = 734.22 mmHg = \frac{734.22}{760} atm=0.966 atm

Temperature  of of hydrogen gas ,T= 25°C =298.15 K

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Moles of hydrogen gas =n

PV = nRT (Ideal gas equation )

n=\frac{PV}{RT}=\frac{0.966 atm\times 0.949 L}{0.0821 atm L/mol K\times 298.15 K}

n = 0.03745 mol

Moles of hydrogen gas = 0.03745 mol

Mass of  0.03745 moles of hydrogen gas  = 0.03745 mol × 2 g/mol = 0.0749 g

Mass of hydrogen gas evolved is 0.0749 grams.

3 0
3 years ago
Which is an unreliable source?
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The source that is unreliable is an advertisement for acne medication claims it can clear up acne in less than one week.

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Citable sources are those sources that are gotten from places that are proven to be of good standards and not from mere claims such as:

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Therefore, the source that is unreliable is an advertisement for acne medication claims it can clear up acne in less than one week.

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Answer:

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