Answer : The ground-state electronic configuration of oxide ion is,
Explanation :
Electronic configuration : It is defined as the distribution of electrons of atom in an atomic orbital.
<u>Oxygen</u>
The total number electrons in oxygen = 6
The electronic configuration of oxygen is,
<u>Oxide ion</u>
The total number electrons in oxide ion, = 6 + 2 = 8
The charge on O is (-2). So, we are adding 2 electrons.
The electronic configuration of oxide ion is,
Answer:
2.14 x 10^-10 M
Explanation:
[H+] = 10^(-pH) = 10^-9.67 = 2.14 x 10^-10 M
5.57 × 10²⁵ molecules of Br₂ will have a mass of 14862.33g
HOW TO CALCULATE MASS:
- The mass of an element can be calculated by multiplying the number of moles by its molar mass. That is;
mass (g) = moles (mol) × molar mass (g/mol)
- However, the number of moles in 5.57 × 10²⁵ molecules of Br₂ will be calculated first by dividing the number of molecules by Avogadro's number.
no. of moles = 5.57 × 10²⁵ ÷ 6.02 × 10²³
no. of moles = 5.57/6.02 × 10²⁵-²³
no. of moles = 0.93 × 10²
no of moles = 93 moles
Molar mass of Br₂ = 159.81g/mol
Mass of Br₂ = 93 × 159.81
Mass of Br₂ = 14862.33g
- Therefore, 5.57 × 10²⁵ molecules of Br₂ will have a mass of 14862.33g.
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Answer:
Natural BGH and rBGH both increase the level of another hormone called insulin-like growth factor (IGF-1) in the cow.
Beef cattle are often given steroids to increase and speed growth. Common steroids include:
-
Natural steroids like estradiol, testosterone, and progesterone
- Man-made steroids from compounds
Major groups such as FDA and Food and Agricultural Organization state track level of hormones in food. They state that the levels of hormones in food are safe to eat. Not everyone agrees.
Explanation:
Hormones are present in all animal products. Some are natural, others may be added through supplements. Hormones and steroids are given to livestock. It can increase the number of dairy products and beef.
FDA establishes the acceptable safe limits for hormones in meat. A safe level for human consumption is a level of drug in the meat that would be expected to have no harmful effect in humans based on extensive scientific study and review.
Answer:
Potassium-40 (40K) is a radioactive isotope of potassium which has a long half-life of 1.251×109 years. It makes up 0.012% (120 ppm) of the total amount of potassium found in nature.
...
Potassium-40.
General
Natural abundance 0.0117(1)%
Half-life 1.251(3)×109 y
Parent isotopes Primordial
Decay products 40Ca (β−) 40Ar (EC, γ; β+)