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Zielflug [23.3K]
4 years ago
9

Which is the most common nutrient deficiency in the world?

Chemistry
2 answers:
Wittaler [7]4 years ago
7 0
 Most likely iron, because I work at a pharmacy and see many people coming in asking for iron minerals.It might not be the right answer but from experience I would say iron.

inna [77]4 years ago
4 0
The most common nutrient deficiency in the world is Iron. 

Iron is the answer.

Final answer:- a) Iron
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Which of the following values would you expect for the ratio of half-lives for a reaction with starting concentrations of 0.05M
harkovskaia [24]

Answer:

The expected ratio of half-lives for a reaction will be 5:1.

Explanation:

Integrated rate law  for zero order kinetics is given as:

k=\frac{1}{t}([A_o]-[A])

[A_o] = initial concentration

[A]=concentration at time t

k = rate constant

if, [A]=\frac{1}{2}[A_o]

t=t_{\frac{1}{2}}, the equation (1) becomes:

t_{\frac{1}{2}}=\frac{[A_o]}{2k}

Half life when concentration was 0.05 M=t_{\frac{1}{2}}

Half life when concentration was 0.01 M=t_{\frac{1}{2}}'

Ratio of half-lives will be:

\frac{t_{\frac{1}{2}}}{t_{\frac{1}{2}}'}=\frac{\frac{[0.05 M]}{2k}}{\frac{[0.01 M]}{2k}}=\frac{5}{1}

The expected ratio of half-lives for a reaction will be 5:1.

6 0
3 years ago
(CH3)2-CH-CH2-O(CH3)3IUPAC NAME
bazaltina [42]

Answer:

1-(tert-butoxy)-2-methylpropane

Note: there is a mistake in formula, the correct formula is (CH₃)₂-CH-CH₂-O-C(CH₃)₃ not (CH₃)₂-CH-CH₂-O(CH₃)₃, because oxygen is a divalent compound.

Explanation:

<em>Structural formula is attached</em>

IUPAC naming rules

1. start numbering the chain from the functional group. In this compound we        start from oxygen side.

2. Here we can see that at position 1 there is an oxy group along with a tertiary carbon having three methyl groups. So we write it as 1-tert-butoxy. Which means that there is a methoxy group at position 1 along with a tertiary carbon.

3. At position 2 we can see that there is a methyl group attached to the main chain, so we write it as 2-methyl.

4. Now we count the total number of carbons in the main chain. As we can see that there are 3 carbons in the remaining or parent chain, so we write it as propane

5. So the IUPAC name of the compound will be 1-(tert-butoxy)-2-methylpropane

3 0
4 years ago
1. Write the balanced chemical equation for the reaction
Step2247 [10]
#1 is already balanced
8 0
3 years ago
Lithium is a metal.
Zina [86]

Answer:

Explanation:

lithium: lithium is very soft, silvery metal. melting point is 180.54°C and boiling point is 1,335°C. it's density is 0.534 grams per cu.cm. oxygen: oxygen is colourless , odorless , tasteless gas

8 0
3 years ago
How do you calculate the number of moles in CO2
gogolik [260]

Answer:

The number of molecules in a mole (known as Avogadro's constant) is defined such that the mass of one mole of a substance, expressed in grams, is equal to the mean molecular mass of the substance. The molecular mass of CO2 = 12+2x16 = 44, so the mass of a mole of CO2 is approximalty 44 grams

Explanation:

3 0
3 years ago
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