<span>Pure substances that have properties
entirely different from the atoms that make it up are called compounds. All
compounds are made up of molecules, but not all the molecules are compounds.
Compounds are composed of more than one mixture of atoms. An example of this is
Hydrogen Gas, it is a molecule but it is not a compound because it is only made
of only one element. But when Hydrogen is mixed with Oxygen, it forms water,
which is now a compound because of the mixture of two hydrogen and one oxygen
atoms. </span>
Hello!
261.35 g ------------------- 6.02x10²³ formula units
? g -------------------------- 5.30 x10²² formula units
( 5.30x10²² ) x 261.35 / 6.02x10²³
= 1.385x10²⁵ / 6.02x10²³
= 23.0 g
I hope this helps! Have a bless day!
400 grams. Due to the law of consevation of mass. It states that mass quantitu must remain constant.
Answer:
- <em><u>3.30 × 10⁶ kg</u></em>
Explanation:
The form of the pool may be approximated to a reactangular prism with height equal to the average depth of water.
<u>1) Dimensions:</u>
- Length: 44.6 m
- Wide: 27.6 m
- Height: 8.80 ft
<u>2) Volume formula</u>
- V = length × width × height
<u>3) Unit conversions</u>
Convert 8.80 ft to meters:
- 1 ft = 0.3048 m ⇒ 1 = 0.3048 m/ft
- 8.80 ft × 0.3048 m/ft = 2.68 m
<u>4) Volume calculation</u>
Substitute the numbers in the formula:
- V = length × width × height = 44.6 m × 27.6 m × 2.68 m ≈ 3,298.97 m³ ≈ 3,300 m³ (it is rounded to three significant digits)
<u>5) Mass of water:</u>
- Density = mass / volume ⇒ mass = density × mass
- Density of water = 1,000 kg / m³
- mass = 3,300 m³ × 1,000 kg / m³ = 3,300,000 kg
<em><u>6) Scientific notation</u></em>
Choose the correct number of significant figures:
- Since the three given factors have 3 significant figures, the correct number of significant figures of the volume and the mass is 3.
The mass must be expressed as a power of ten. The mantissa contains only the significant digits, and the number before the decimal point can only have one digit 1 through 9.
- 3,300,000 kg = 3.30 × 10⁶ kg
Answer:
the mass of each element can be recovered from is 162.23 grams
Explanation:
the mass really depends on the volume. If there is 74.0% carbon, 8.6% hydrogen and 17.3% nitrogen then you first cross out the 0 and 3 which leaves you with 17% and 74%. Then all you have to do is multiply 17% and 74% and then divided it by 8.6%.
