<em>C = 0,75 mol/dm³</em>
<em>V = 500mL = 500cm³ = 0,5dm³</em>
C = n/V
n = 0,75×0,5dm³
<u>n = 0,375 moles</u>
<em>M NaCl: 23+35,5 = 58,5g</em>
1 mole ---------- 58,5g
0,375 ----------- X
X = 0,375×58,5
<u>X = 21,9375g NaCl</u>
:)
Answer:
increase atomic number
they all have numbers on the top that continues
The problem ask to calculate the density of the solid if it has a mass of 9.35g and is place in a 15ml flask. Base on my calculation and further formulation about the density of the two, by subtracting the density of the Benzene, the solid has a density of 1.59g/ml. I hope this would help
Answer:
-. D
6. A
Explanation:
Chromosomes are presented in a genotype. Chromosomes are structures within a cell that contains a person's gene while genotype is an individual collection of genes. Therefore genotype reflect the chromosomes present in cell
6. Genetic diseases differ from other diseases because recurrence risk is predictable since genes are transferred from parent to offspring and therefore the diseases are transferred from parent to offspring
I think the answer is (1) Co. Because the element of Cobalt also has 2 electrons at the outer layer which is the same as Calcium. And the outer layer is an important factor which can affect the property of an element.
