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Elanso [62]
3 years ago
14

Marco designs an experiment that will test whether a new plant food makes a grape vine produce more grapes. What is the independ

ent variable in his experiment?
Chemistry
1 answer:
padilas [110]3 years ago
6 0

The plant food. He's comparing the new plant food with his regular, or old, plant food.

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The nucleus of an atom contains at least one<br> proton.<br> True or false
Svetllana [295]
The answer is falling
5 0
3 years ago
Giselle is working with a chemical substance in a laboratory. She observes that when the chemical is heated, it gives off a gas.
Phoenix [80]

The correct answer is option B, that is, hypothesis.  

A hypothesis refers to an anticipated illustration for an occurrence. It refers to a proposed illustration or a supposition made on the groundwork of inadequate proof as an initiation point for further investigation. In order for a hypothesis to be a scientific hypothesis, the scientific method needs that one can examine it.  


6 0
4 years ago
Read 2 more answers
How is a battery and a banana the same when considering energy?
emmainna [20.7K]

A battery and a banana are the same when considering energy:

A battery when connected to a device produces electro-chemical reactions and contains one or more cells. The same thing can be tried out with fruits also. There are many fruits which can be taken into account. A lemon shows less amount of voltage when seen through a multimeter rather than a banana which shows a higher voltage. This was because of the acid present in the a fully ripped banana. The acid is called ascorbic acid. This acid has a higher pH level than compared to the pH of the citric acid found in lemon.  

This shows that a banana plant is not so expensive and reliable for the production of renewable energy and a battery is also inexpensive, reliable and stable.

4 0
4 years ago
How many grams are in 2.3 x 10^ -4 moles of calcium phosphate? ​
Yanka [14]

Answer:

Mass = 713.4 ×10⁻⁴ g

Explanation:

Given data:

Number of moles of calcium phosphate = 2.3×10⁻⁴ mol

Mass of calcium phosphate = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of calcium phosphate is 310.18 g/mol

by putting values,

2.3×10⁻⁴ mol = mass / 310.18 g/mol

Mass = 2.3×10⁻⁴ mol × 310.18 g/mol

Mass = 713.4 ×10⁻⁴ g

3 0
3 years ago
Why is the wavelength of 633 nm used to analyze the standard solutions and drink samples?
DanielleElmas [232]

Answer:

The correct option is;

A. Corresponding with orange light, is the wavelength that blue solutions absorb the most

Explanation:

The wavelength of 633 nm is the wavelength of red light emitted by the helium-neon laser also known as the He-Ne laser

According to absorption spectroscopy and the color wheel, a solution or drink sample that is efficient at absorbing light having a wavelength of 633 nm will appear blue, because, light at 633 nm is red and very close to orange which is the complementary color blue light.

4 0
3 years ago
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