In general the atoms consist of 3 basic particles
In the nucleus there is protons (they have positive charge) and neutrons (they don’t have a charge).
And around them are electrons
Moles of Br- is mathematically given as
moles of Br-=28*10^{2}
Option A
<h3>
Moles of Br-</h3>
The chemical reaction is
MgBr2 ----> Mg+2 + 2Br-
Let 940mL be present
Generally the equation for the Morarity is mathematically given as
molarity = moles / volume (L)
Therefore
1.5 = moles / 940 x 10-3
moles = 1400
Hence, moles of MgBr2 is 1.0125
Therefore
moles of Br- = 2 x moles of MgBr2
moles of Br- = 2 x 1400
moles of Br-=28*10^{2}
Mor on Molecules
brainly.com/question/19922822
Answer:
b
Explanation:
Please see more detailed explanation in the picture attached below.
Hope this answer can help you. Have a nice day!
Answer and Explanation:
1 Km= 100 X 1000 cm
1 Hour= 60 X 60 = 3600 sec
With this in mind:
1 cm = 10-⁵ Km
1 sec = 0.00027777777 hour
Now:
speed= 71.7 cm/sec = 71.7 x 10-⁵ / 0-00027777777 km/hr =
2.5560 km/hour ⁻¹
The right answers are: B) and C)