Answer:
It cost Evan $17.70 to send 177 text messages. How many text messages did he send if he spent $19.10?
Explanation:
I cant do this
The answer is 4.
Gases have low densities, because of the increased space between hight-energy particles.
Answer:
The answer is "
"
Explanation:
Given:
Molarity= number of moles
because it is 1 Liter
therefore,
it takes 20 mL of Tris.
So, take 
Answer:
d. 1.2 × 1024
Explanation:
From the equation of reaction
2H2 + O2= 2H2O
i.e 2mole(4g) of hydrogen requires 1 mole(32g) of oxygen to produce 2mole (2×6.02×10^23 molecules) of H2O= 1.2×20^24 molcules of water.
NB: 1 mole of H2O contains 6.02×10^23 molecules of H2O
C. All the energy stored in the battery had been transformed.
