It is thought that Vitamin C might be an effective preventative

Chemistry

1 answer:

Anon25 [30]3 years ago

7 0

Answer:

IF the fruit juice contains a high level of vitamin C, THEN the preventative effectiveness against common cold increases.

Explanation:

The hypothesis is a testable explanation of a scientific investigation. It aims at predicting the outcome of the experiment. One feature of the hypothesis is that it must be testable. The hypothesis is usually written in an "IF, THEN" format.

This question is regarding an experiment to test the amount of vitamin C in fruit juice. The vitamin C is thought to be an effective preventative against common cold. Hence, the hypothesis connects the effect on common cold (dependent variable) with the amount of vitamin C (independent variable). The hypothesis can be written as:

IF the fruit juice contains a high level of vitamin C, THEN the preventative effectiveness against common cold increases.

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The________ cation will precipitate after the_________ step. Then the _________cation will precipitate after the________ step.

Novay_Z [31]

Answer:

f. Sn^4+

c. second

e. Al^3+

d. third

Explanation:

This question comes from a quantitative analysis showing the flowchart of a common scheme for identifying cations.

Now, from the separation scheme, Let's assume that Sn⁴⁺ & Al³⁺ were given; Then, Yes, the separation will work.

However, there will be occurrence of precipitation after the 1st step1.

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Coal power plants burn large amounts of coal, c(s), in an o 2 (g) atmosphere to generate electricity. the chemical reaction re

charle [14.2K]

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m(C) = 100000 kg · 1000 g/kg = 10⁸ g.
n(C) = m(C) ÷ M(C).
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From chemical reaction: n(C) . n(CO₂) = 1 : 1.
n(CO₂) = 8,33·10⁶ mol.
m(CO₂) = 8,33·10⁶ mol · 44 g/mol.
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V(CO₂) = 3,66·10⁵ kg ÷ 1,98 kg/m³ = 1,84·10⁵ m³.
V(CO₂) = 1,84·10⁵ m³ · 1000 l/m³ = 1,84·10⁸ l.

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Which is the best description of the chemical reaction shown here in aqueous solution? ch3ch2cooh (aq) ↔ ch3ch2coo- (aq) + h+ (a

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The given reaction:
ch3ch2cooh (aq) ↔ ch3ch2coo- (aq) + h+ (aq)
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This means that, the reaction does not reach an end point.
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So, the reaction proceeds in both direction forming both reactants and products.

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3 years ago

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prisoha [69]

The answer is 5.32 × 10²³ molecules

Avogadro's number is the number of units (atoms, molecules) in 1 mole of substance:
6.023 × 10²³ units per 1 mole

We have 0.883 moles.
If 1 mole has 6.023 × 10²³ molecules, 0.883 moles will have x molecules:
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x = 6.023 × 10²³ molecules * 0.883 moles : 1 mole = 5.32 × 10²³ molecules

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3 years ago

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Answer: it would release heat because the thermal energy it absorbed to become a gas. so it would release heat. hope this helps :)

Explanation:

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