Answer:
copper rally isn't useful like iron we have cars and all that but copper is made for like copper coins and wires
Explanation:
Iron is more reactive than copper as copper has less outer shells than iron so copper is less likely to react with another element as it has a stronger hold over the electrons.
Answer:
are you talking about plant cells?
Explanation:
Yes. Everything is made up of mass. If it takes up space, it has mass
Given :
Volume of stock solution, .
Volume of diluted solution, .
Molarity of diluted solution, .
To Find :
The concentration of the stock solution.
Solution :
We know, dilution factor is given by :
....1)
and ....2)
Putting volume in above equation, we get :
D.F = 400/20
D.F = 20
Putting value of D.F in equation 2) we get :
The concentration of stock solution is nearest to 30 M.
Therefore, the correct option is 1) 30 M.
Answer:
20.0 grams
Explanation:
If the density of gold is 20.0 g/mL, then we can multiply it by 1 mLto find the weight of 1 mL of gold.
20.0*1mL=20.0 grams