Try warm water& soap if u haven’t already,if that doesn’t work try rubbing alcohol
+2, +1 is the charge of copper
Answer:
116 Cal
Explanation:
15 g CHO × 4 Cal/g = 60 Cal
5 g PRO × 4 Cal/g = 20
4 g fat × 9 Cal/g = <u> 36 </u>
TOTAL = 116 Cal
There are 116 Cal in one serving of the product.
Density is mass by volume
1 mL of nitric acid solution has a mass of 1.36 g
therefore 1000 mL has a mass of 1360 g
the molarity of solution is 2.48 mol/L
1 L of solution has 2.48 mol
the mass of 2.48 mol of HNO₃ is - 2.48 mol x 63 g/mol = 156.24 g
this means that 156.24 g of the solution consists of nitric acid
therefore percentage by mass - mass of nitric acid / total mass x 100%
concentration as percentage by mass = 156.24 g / 1360 g x 100%
percentage = 11.5%
Answer:
The electrons of an atom are typically divided into two categories: valence and core electrons. Valence electrons occupy the outermost shell or highest energy level of an atom while core electrons are those occupying the innermost shell or lowest energy levels
Explanation:
i hope u get it :))
