Answer:
mix 1 mL of the stock solution of MgCl2, 300 mL of the stock solution of NaCl and 699 mL of water.
Explanation:
We need to determine the volume necessary of both stock solutions. When a dilution is made, a certain volume of the stock solution is collected and then more solvent is added to it until the volume is completed. So, the number of moles of the solute in both solutions are the same, and it is the concentration (C) multiplied by the volume (V). If 1 is the stock solution and 2 the diluted solution:
C1*V1 = C2*V2
So, in this case, the two solutions will be mixed, and then the volume will be completed with the solvent. So, for MgCl2:
C1 = 1.0 M
C2 = 1.0 mM = 0.001 M
V2 = 1.0 L = 1000 mL
1*V1 = 0.001*1000
V1 = 1 mL of the stock solution of MgCl2
For NaCl:
C1 = 0.50 M
C2 = 0.15 M
V2 = 1000 mL
0.50*V1 = 0.15*1000
V1 = 300 mL
So, it will be necessary 1 mL of the stock solution of MgCl2, 300 mL of the stock solution of NaCl and 699 mL of water.
Dang well get that app that you take a picture of then bam your answer good luck dude.
Answer:
C: 4
Explanation:
In every single covalent bond, each atom shares one electron. 1 + 1 = 2. A double bond is just two bonds so, 2 x 2 = 4.
Answer:
Option D is correct.
D) venus
Explanation;
CHECK THE COMPLETE QUESTION BELOW;
Early one morning, looking East, you see what appears to be a star. Your friend, Sheen, tells you that it's not a star, it's a planet. Which planet is it likely to be? A) neptune B) pluto C) uranus D) venus
EXPLANATION;
Venus;
Apart from the sun and the moon, Venus is described as the brightest object in the sky, it can be visualised as a very bright star in the sky when looked upon in the evening or morning.It is reffered to as the planet that is best close to Earth as far as solar system is concerned, and also the second planet from the sun with it's surface covered with volcanoes, lava plains and others
Venus is a bit smaller in size compare to the Earth and inner part of it is also similar with that of Earth.
The temperature of Venus is extremely high that it can melt metals such as lead so human cannot withstand the extreme heat.