Answer: 78.919 amu
Explanation:
If the natural abundance of Br-81 is 49.310%, then the natural abundance of Br-79 must be 100%-49.310%=50.690%
Substituting into the atomic mass formula,
Answer:
2L
Explanation:
We'll begin by writing the balanced equation for the reaction this is illustrated below:
2H2 + O2 —> 2H2O
1 mole of a gas occupy 22.4L.
1 mole of O2 occupy 22.4L.
2 moles of H2O occupy = 2 x 22.4 = 44.8L.
From the balanced equation above,
22.4L of O2 produced 44.8L of H2O.
Therefore, 1L of O2 will produce = 44.8/22.4 = 2L.
Therefore, 1L of O2 will produce 2L of H2O.
The group of organs that work together to perform a specific function is called an organ system.
Answer:
C
Explanation:
The net force is the total of the forces and if forces are opposing you would subtract the lesser from the greater thus giving you the remaining force.