Answer:
3 g/mL
Explanation:
Density is mass divided by volume (g/mL).
Mass of rock = 12.5
Volume of rock = 24-20 = 4mL
Density of rock = 12.5g/ 4mL = 3.125 g/mL
Round to the lowest number of significant figures which is 1 to get 3 g/mL
Answer:
100 yard = 91.44 meters
Explanation:
1 yard = 0.9144 m
We need to find how many meters are in a 100-yard football field. For this, we must use the unitary method as follows :
100 yard = 100 × 0.9144 m
= 91.44 m
Hence, there are 91.44 meters in 100 yard.
Answer:
3.67 atm
Explanation:
Because the gases are not reacting and the temperature remaining the same, we can apply Boyle's Law:
P1V1 = P2V2
Where P is the pressure, V is the volume, 1 is the initial state, and 2 the final state.
For a mixture of gases, from Dalton's law, the total pressure is the sum of the partial pressures of the components, so:
P1V1 = PHe*Ve + PNe*VNe
PHe*Ve + PNe*VNe = P2*V2
5.6*3.0 + 3.6*4.5 = P2*9
9P2 = 33
P2 = 3.67 atm
Answer:
The answer to your question is pH = 3.3
Explanation:
Data
pH = ?
[HNO₂] = 0.00052 M
pH measures the [H⁺] in a solution. It has a range of 0 to 14. Acids have a pH from 0 to 6.9, a neutral solution has a pH of 7.0 and alkalis have a pH from 7.1 to 14.
Formula
pH = -log [H⁺]
Substitution
pH = -log[0.00052]
Simplification
pH =- (-3.284)
-Result
pH = 3.3