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: 0.5 moles
Explanation:
Nitric acid has a chemical formula of HNO3.
Given that:
Amount of moles of HNO3 = Z (let unknown value be Z)
Volume of HNO3 solution = 2L
Molarity of HCl solution = 1M
Recall that molarity of a solution is obtained by dividing the amount of moles by volume in liters
i.e Molarity = Amount in moles/volume
1M = Z x 2L
Z = (1M / 2L)
Z = 0.5 moles
Thus, 0.5 moles of nitric acid are needed to make 2 liters of its solution.
acidic rain water can leach aluminum from soil clay particles
Answer:
3.25 L
Explanation:
A 2.0M solution of HCl will have 2 moles of HCl for each liter of solution. 1.5 liters of 5.0M NaOH has a total of 5*1.5=7.5 moles of NaOH. Therefore, you would need 7.5/2=3.25 liters of HCl. Hope this helps!