The boiling point and distillation temperature of a substance are the same. The answer would be True
Answer:
Three.
Explanation:
When counting the number of significant figures in a decimal number, you start counting from the right of the decimal point.
0
.00203
Counting from left to right from the decimal point , there are 5 digits.
However, the zeroes before any natural number is not counted as a significant figure.
0.00
203
Thus, there are
3
significant figures ie. 203.
Note: any other numbers added to the right of
0.00203
is also counted as a significant number.
eg.
0.002031
has 4 significant figures.
eg.
0.002030
has 4 significant figures.
Answer : The correct option is, (a) lose electrons and form a positive ion
Explanation :
Metals : These are the elements that easily loose electrons and forms cations.
They require less energy to loose electrons because electrons are loosely bound to the nucleus.
Non-metals : These are the elements that easily gain electrons to form an anion.
They require more energy to loose electrons because the electrons are tightly bound to the nucleus.
As per question, when a metal reacts with a nonmetal, the metal will lose electrons and form a positive ion and non-metal gain electrons and form a negative ion.
Hence, the correct option is, (a)
This is pretty simple actually :) You are going to use the equation M1xV1=M2xV2
M stands for molarity and V is volume. Plug in the information you have, and then solve for the unknown using simple algebra. You get 6.0M NaNo3 x 250mL= 15M NaNO3 x V2. Now solve for V2. Keep in mind that you will have to use stoichiometry to convert to liters instead of liters if your answer requires it. Hope this helps! :)
I not getting the value but I know the equation it is NO OF MOLECULES =AVAGADROS CONSTANT *NO OF MOLES
