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Answers
Answer:
Recommended intake
Nutritionists measure some vitamins in two ways:
micrograms (mcg) RAE
international units (IU)
Food packages usually show the amounts in IU. A diet that contains 900 mcg RAE of vitamin A, which is the recommended intake for males over 14 years of age, would provide around 3,000–36,000 IU of vitamin A, according to the Office of Dietary Supplements (ODS).
Anyone who has concerns about their vitamin A intake should seek advice from a health professional, who will help them understand these measures.
The recommended intake of vitamin A varies by age and sex.
The 2015–2020 Dietary Guidelines for AmericansTrusted Source recommend consuming the following amounts each day. Amounts are in mcg RAE.
Age (years) 1–3 4–8 9–13 14 and over
Female 300 400 600 700
Male 300 400 600 900
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Answer:
Chemical reaction of iron nail with copper sulphate solution in water. Iron displaces copper ions from an aqueous solution of copper sulphate. ... In this reaction, metallic iron is converted into ferrous ion (Fe2+) and cupric ion (Cu2 +) is converted into metallic copper. Fe (s) + Cu2 + (aq) —→ Fe2+ (aq) + Cu (s).