No idea , sorry. maybe it is.....actually i dont know, sooo sorry
Density<span> is </span>defined<span> as the ratio between mass and volume or mass per unit volume.
Source is google
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<span>The answer is C.) Layer A is the stratosphere and Layer B is the troposphere.
Let me know if you have any other questions ♥
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Answer:
Ride a bike or walk. If you are only going a short distance, consider riding a bike or walking instead of driving. ...
Take public transit. ...
Carpool. ...
Avoid idling. ...
Use alternative fuels.
Answer:
a) 210 mL of 95% ethanol
b) 75 mL of water
Explanation:
a) We can use the dilution equation to solve this problem. C₁ and V₁ are the concentration and volume of the stock solution, respectively, while C₂ and V₂ are the concentration and volume of the diluted solution.
C₁V₁ = C₂V₂
We want to find V₁, the volume of ethanol stock we need to dilute to prepare the final solution:
V₁ = (C₂V₂) / C₁
The concentrations are represented in percentages. We substitute in the known values to calculate V₁. The units cancel to leave us with units of mL.
V₁ = (C₂V₂) / C₁ = (70%)(285mL) / (95%) = 210 mL
b) The final solution volume is 285 mL and we have added 210 mL of ethanol, so the remaining volume is from the water that we add:
(285 mL - 210 mL) = 75 mL
