Why is mining for coal a long-term concern?
O The supply will eventually be exhausted.
O New...
Chemistry, 25.09.2021 19:10 coolasslimm
Why is mining for coal a long-term concern?
O The supply will eventually be exhausted.
O New methods of mining need to be developed.
O The demand for coal is diminishing.
It is being replenished faster than it can be mined.
I need help
Answers: 1
Chemistry, 22.06.2019 08:00
Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next
Answers: 2
Chemistry, 22.06.2019 10:10
Stage in which a typical star has completely stopped fusion
Answers: 1
Chemistry, 22.06.2019 15:30
The reactions of photosynthesis occur in the of plant cell? a.mitochondria. b. lysosomes. c. chloroplasts. d. chlorophyll
Answers: 1
Chemistry, 22.06.2019 16:50
Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 1
Chemistry, 22.01.2020 01:31
Biology, 22.01.2020 01:31
English, 22.01.2020 01:31
Mathematics, 22.01.2020 01:31
History, 22.01.2020 01:31
Mathematics, 22.01.2020 01:31
Mathematics, 22.01.2020 01:31