Question Number 6 of 10 - 8th Grade Science A group of people were concerned about a new coal-burning power plant that might be built in their
neighborhood. What is probably their main concern?
The heat from burning coal can drive
generators that produce electricity
There is more coal in the earth than
there is oil and gas,
Burning coal produces sulfur dioxide
which contributes to acid rain.
Burning coal produces more heat
than burning wood

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Lab reagent, hypothesis test. a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl. these six measurements are assumed to be an srs of all possible measurements from solution. they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution. carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.

How can nonpolar molecule contain polar covalent bonds