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3 years ago

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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A wave has an energy of 1.5x10^3 J. Find its wavelength?

weqwewe [10]

Answer:

1.3 × 10⁻²⁸ m

Explanation:

The equation relating the energy (<em>E</em>) and the wavelength (λ) of a wave is

$E =\frac{hc}{\lambda}$

where <em>h</em> = Planck’s constant and <em>c</em> = the speed of light

$\lambda =\frac{6.626 \times 10^{-34}\text{ J}\cdot \text{s} \times 2.998 \times 10^{8} \text{ m} \cdot \text{s}^{-1}}{1.5 \times 10^{3} \text{ J}} = 1.3 \times 10^{-28}\text{ m}$

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4 years ago

Write the chemical equation for the following reaction: the elements carbon and oxygen combine to yield the compound carbon diox

Marta_Voda [28]

Product of this reaction depends on the amount of oxygen. i.) If oxygen is excess: Carbon, as graphite, burns to form gaseous carbon (IV) oxide (carbon dioxide), CO2 Equation : C + O2 ----> CO2. This reaction is also called combustion reaction. The expensive way to produce CO2 is to burn Diamond in the presence of air at 600-800°C. Hope it helped you. :D

8 0

3 years ago

Dsm-5 includes gambling disorder as an addictive disorder, along with substance use disorders. this change is considered importa

Airida [17]

Dsm-5 includes gambling disorder as an addictive disorder, along with substance use disorders. This change is considered important because it suggest that people may become addicted to behavior net just substance.

<h3>What is Gambling ? </h3>

Gambling disorder which involve repeated, problem gambling behavior. The behavior leads to problem for the individual families, and society.

The emotional and physical sign of gambling disorder are:

Anxiousness and Depression
Hopelessness
Lack of sleep
Pallor to skin
Gain loss of weight

<h3>What are the effects of gambling disorder ?</h3>

Gambling disorder make another kind of addiction that an individual uses to be able to deal with the situation. Start using the drugs alcohol to reduce the feeling of anxiety.

Thus from the above conclusion we can say that Dsm-5 includes gambling disorder as an addictive disorder, along with substance use disorders. This change is considered important because it suggest that people may become addicted to behavior net just substance.

Learn more about the Gambling Disorder here: brainly.com/question/28026101

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6 0

1 year ago

An atom of sodium and an atom of flourine will combine to form sodium flouride. Which of the following correctly describes sodiu

Alenkasestr [34]

Answer:

A compound

Explanation:

A compound is formed when two elements combine together. Both sodium and fluorine are elements. These elements combine via the process of chemical bonding.

In this case, an ionic bond is formed between sodium and fluorine, this leads to the emergence of the compound sodium chloride, hence the answer above.

4 0

3 years ago

Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The half-life of iodine-131 is 8.04

evablogger [386]

Answer:

16.6 mg

Explanation:

Step 1: Calculate the rate constant (k) for Iodine-131 decay

We know the half-life is t1/2 = 8.04 day. We can calculate the rate constant using the following expression.

k = ln2 / t1/2 = ln2 / 8.04 day = 0.0862 day⁻¹

Step 2: Calculate the mass of iodine after 8.52 days

Iodine-131 decays following first-order kinetics. Given the initial mass (I₀ = 34.7 mg) and the time elapsed (t = 8.52 day), we can calculate the mass of iodine-131 using the following expression.

ln I = ln I₀ - k × t

ln I = ln 34.7 - 0.0862 day⁻¹ × 8.52 day

I = 16.6 mg

8 0

3 years ago