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wolverine [178]
3 years ago
15

How many atoms are in .00 × 10-10 g Au

Chemistry
1 answer:
Shtirlitz [24]3 years ago
6 0
Atomic mass Au = 196.96 u.m.a

196.96 g ----------- 6.02x10²³ atoms
0.00x10⁻¹⁰ g -------  ( atoms ? )

( 0.00 x10⁻¹⁰) x 6.02x10²³ / 196.96

0 / 196.96

= 0 atoms

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Prform the following operation and express the answer in scientific notation 6.0 x 10^3-2.310^3
Marrrta [24]

The value 6.0 x 10^3- 2.3 × 10^3 in scientific notation is 3.7 × 10^3.

<h3> What is scientific notation?</h3>

Scientific notation is a way to write very large or very small numbers so that they are easier to read and work with.

You express a number as the product of a number greater than or equal to 1 but less than 10 and an integral power of 10 .

<h3>Why it is used? </h3>

There are two reasons to use scientific notation.

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Given,

= 6.0 x 10^3- 2.3 × 10^3

= (6.0 - 2.3) × 10^3

= 3.7 × 10^3

Thus, we find that the value 6.0 x 10^3- 2.3 × 10^3 in scientific notation is 3.7 × 10^3.

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2 years ago
What are examples of molecular compounds that we use in everyday life?
IrinaVladis [17]

Answer:

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6 0
3 years ago
A 6.50x10^-5 m solution of potassium permanganate has a percent transmittance of 27.3% when measured in a 1.15 cm cell at a wave
mihalych1998 [28]
For this problem, we use the Beer Lambert's Law. Its usual equation is:

A = ∈LC
where
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As you notice, we only have to find the absorbance. But since we are not given with the molar absorptivity, we will have to use the modified equation that relates % transmittance to absorbance:

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7 0
3 years ago
____ 26. what is the weight percentage of nitrogen in urea, cn2h4o
Paraphin [41]
Weight percentage of nitrogen can be calculated using the following rule:
weight percentage of nitrogen = (weight of nitrogen / weight of urea) x 100

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therefore:
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Substitute with the masses in the equation to get the percentage:
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3 years ago
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