I believe it’s c since it’s 2.5 cups of flour for each butter
Answer:
The nichrome wire is dirty.
The solution is contaminated.
Explanation:
If the nichrome wire is dirty, it may contain sodium contaminants which may be responsible for the yellow flame. The nichrome wire is first inserted into the flame without the sample to check for impurities.
The test solution may also have been contaminated. This leads to the appearance of a colour different from the expected colour of the test cation in the solution.
Answer:
The possible values of l are 2 and 3
Explanation:
Each electrons have four quantum numbers:
- n: the principal quantum number, which value matches with the energy level of the electron.
- l: the secondary quantum number, which value can be from 0 to n-1
- m: the magnetic number, which value can be from -l to l
- sp: the spin number which value can be -1/2 or +1/2
In this case, n=4 so the values of l are:
l=0, 1, 2, 3
Now, if:
- l=0 the value of m is m=0
- l=1 the values of m are m= -1, 0, 1
- l=2 the values of m are m= -2, -1, 0, 1, 2
- l=3 the values of m are m= -3, -2, -1, 0, 1, 2, 3
Being all that said, l can be either equal to 2 or 3
Answer:
The equation: (NH₄)₂SO₄ = 2NH4(+) + SO4(-2)
The number of moles = 5 g / 132.14 g/mol = 0.038 mol
The number of molecules = 0.038 X 6.022x10^23 = 2.29x10^23
the number of positive ions present in the ammonium sulphate solution:
2 positive ions for every 1 molecule of (NH₄)₂SO₄
so 2 x 2.29x10^23 = 4.58x10^23
the number of negative ions present in the ammonium sulphate solution
1 negative ion for every 1 molecule of (NH₄)₂SO₄
so 1 x 2.29x10^23 = 2.29x10^23
the total number of ions present in the ammonium sulphate solution
4.58x10^23 + 2.29x10^23 = 6.87x10^23
These substances can be separated by distillation, so your answer is A.
