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shtirl [24]
2 years ago
11

Which choice best describes a testable hypothesis?

Chemistry
1 answer:
valentinak56 [21]2 years ago
4 0

Answer:

A. carrots look better when given more water

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A helium laser emits light with a wavelength of 633nm. what is the frequency of light
wel

Answer:

 

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.

Explanation:

3 0
3 years ago
Why is it more accurate to say that the concentration of a solution of acetic acid is 0.01 f rather than 0.01 m?
olasank [31]

A 1 F solution stands 1 formula unit per litre and 0.01 F describes the concentration of solution with no deliberation for the real form of existence of species.

Molarity is defined as the ratio of moles of solute to the volume of solution in litres and it is used to describe formality. For accuracy, it is essential to expressed molarity of each species. In case of acetic acid, the molarity of acetic acid molecules is less than 0.01 M due to dissociation.

Thus, it is more precise to say that the concentration of a solution of acetic acid is 0.01 F instead of 0.01 M.

4 0
3 years ago
Read 2 more answers
When used as pure gases for welding ferrous metals, ____ may produce an erratic arc action, promote undercutting, and result in
kvv77 [185]

Answer:

argon and helium

Explanation:

Argon and Helium is belongs to noble gas. Since novel gases are completely filled outer orbital. therefore they are erratic nature. Hence, noble gas are very stable as it neither except electron nor it denote due to it paired of electronic configuration.

Depending on the materials being welded, these atmospheric gases react with welding area and either it reduces the quality of the weld or make the welding more difficult.

Therefore, to protect welding area from atmospheric gases noble gases which are small in size are used.

Thus, argon and helium are used.

4 0
1 year ago
If the thorium-232 isotope emits an alpha particle, what would be the atomic number of the resulting atom?
inysia [295]

<span>Answer is: atomic number of resulting atom is 88.
Alpha particle is nucleus of a helium-4 atom, which is made of two protons and two neutrons.
Nuclear reaction: ²³</span>²Th → ²²⁸Ra + α (alpha particle).

Alpha decay is radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and transforms into an atom with an atomic number that is reduced by two and mass number that is reduced by four.

4 0
3 years ago
If you had .0451 moles of CaCl2, how many grams would you have?
Montano1993 [528]

Answer:

option C

Explanation:

because i took the test

8 0
2 years ago
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