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3 years ago

Which are homogeneous mixtures? check all that apply

Chemistry

2 answers:

marishachu [46]3 years ago

5 0

Answer:

isk tbh,

Explanation:

Nutka1998 [239]3 years ago

3 0

Answer:

vinegar, sugar water, and soda pop in a sealed bottle.Explanation:

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When driving your car, you hear a squeal every time you press the brakes. You decide the problem is that there's a mouse trapped

arsen [322]

Hypothesis because law don’t make sense and theory is for something that already has data behind it. In this case you don’t do it’s not hypothesis

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3 years ago

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A) fluorite<br><br> B) orthoclase<br><br> C) apatite<br><br> D) gypsum

Sidana [21]

C

I’m pretty sure it’s c

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2 years ago

Given the wavelength of the corresponding emission line, calculate the equivalent radiated energy from n = 4 to n = 2 in both jo

lions [1.4K]

Explanation:

It is given that,

Initial orbit of electrons, $n_i=4$

Final orbit of electrons, $n_f=2$

We need to find energy, wavelength and frequency of the wave.

When atom make transition from one orbit to another, the energy of wave is given by :

$E=-13.6(\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2})$

Putting all the values we get :

$E=-13.6(\dfrac{1}{(4)^2}-\dfrac{1}{(2)^2})\\\\E=2.55\ eV$

We know that : $1\ eV=1.6\times 10^{-19}\ J$

So,

$E=2.55\times 1.6\times 10^{-19}\\\\E=4.08\times 10^{-19}\ J$

Energy of wave in terms of frequency is given by :

$E=hf$

$f=\dfrac{E}{h}\\\\f=\dfrac{4.08\times 10^{-19}}{6.63\times 10^{-34}}\\\\f=6.14\times 10^{14}\ Hz$

Also, $c=f\lambda$

$\lambda$ is wavelength

So,

$\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{6.14\times 10^{14}}\\\\\lambda=4.88\times 10^{-7}\ m\\\\\lambda=488\ nm$

Hence, this is the required solution.

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3 years ago

Compare the following sodium atoms in terms of their neutrons and mass numbers 24Na, 23Na

olga_2 [115]

Na-24 and Na-23 have the same number of atoms=11, different neutrons(13 and 12),different mass number(24 and 23)

<h3>Further explanation </h3>

The elements in nature have several types of isotopes

Isotopes have the same number of protons and having a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

₁₁²³Na

number of atoms = 11

mass number = 23

number of neutrons=23-11=12

₁₁²⁴Na

number of atoms = 11

mass number = 24

number of neutrons=24-11=13

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3 years ago

What is the relationship between a cell and an organism?

alukav5142 [94]

Answer:

100%

Explanation:

Cell is the structural and functional unit of life. Without Cell, an organism can never be created.

6 0

2 years ago

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