624 nm x 10^-9 = 6.2 x 10^-7
(3.00 x 10^8) divided by (6.2 x 10^-7) = 4.8 x 10^14
(6.63 x 10^-34 J) x ( 4.8 x 10^14) = 3.2 x 10^-9 Joules
Answer:
For every 2 moles of Na used, 2 moles of NaCl are produced.
Explanation:
Answer: Yes it is large enough to store the acid.
Explanation:
Density is defined as the mass contained per unit volume.
Given : Mass of acid = 225 grams
Density of acid =
Putting in the values we get:
Thus volume of the acid is and thus Erlenmeyer flask with volume of 150 ml is enough to contain the acid.
The element that will have the lowest electronegativity is an element with a small number of valence electrons and a large atomic radius.
Electronegativity of an element is the ability or power of that element in a molecule to attract electrons to its Valence electrons. The following are the properties of electronegativity:
- It increases across a period from left to right of the periodic table,
- It decreases down the periodic table groups
- Group 1 elements are the least (lowest) electronegative elements. These elements have the lowest valence electrons with a large atomic radius.
- Group 7 elements are the most electronegative elements.
Atomic radius of elements increase down a group because of a progressive increase in the number of shells occupied by electrons which increases the size. But it decreases across a period because electrons are accommodated within the same shell leading to greater attraction by the protons in the nucleus.
Learn more about electronegativity of elements here:
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