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2 years ago

8

300×175 Express your answer using the correct number of significant figures.

1 answer:

icang [17]2 years ago

3 0

Answer:

300×175=52500

Explanation:

caculator

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How many neutrons are in Lithium

Alik [6]

Answer:

They have 0-9 neurons

Explanation:

8 0

3 years ago

Claims · Evidence • Reasoning A student

sashaice [31]

As with the properties of a substance, the changes that substances undergo can be classified as either physical or chemical. During physical changes a substance changes its physical appearance, but not its composition. The evaporation of water is a physical change.

(I searched that up but here’s an explanation with my own words that you can use):

Change in matter can be classified as a physical change as well as a chemical change due to the properties of substance. A physical change changes substance within its appearance but not its composition. For an example: The evaporation of water is a physical change.

There you go hopefully that helped

3 0

2 years ago

Consider the following three-step reaction pathway.

Alenkinab [10]

Answer:

$NO \longrightarrow N_2O_2 \longrightarrow N_2O \longrightarrow N2$

Explanation:

The intermediates are the products of all the steps of the reaction pathway, with the exception of the last one. So the intermediates will be:

N2O2 from the first step
N2O from the second step

The list from reactant to final product:

$NO \longrightarrow N_2O_2 \longrightarrow N_2O \longrightarrow N2$

<em>Note: the water is considered a by-product, given that is not the product of interest in this steps.</em>

7 0

3 years ago

two alcohols are used in our everyday lives - rubbing alcohol and ethylene glycol. In terms of molecular polarity why is rubbing

dangina [55]

Answer:

https://www.edencsd.org/cms/lib/NY19000545/Centricity/Domain/38/Organic%20Answers.pdf

Explanation:

7 0

3 years ago

What is the change in energy of an atom if the wavelength of the photon absorbed by the atom is equal to 4.64 x 10-7 meters? (Pl

Dmitry [639]

Answer : The change in energy of an atom is, $4.28\times 10^{-19}J$

Solution : Given,

Wavelength of the photon = $4.64\times 10^{-7}m$

Formula used :

$E=h\times \frac{c}{\lambda}$

where,

E = energy of an atom

h = Planck’s constant = $6.626\times 10^{-34}Js$

c = speed of light = $2.998\times 10^{8}m/s$

$\lambda$ = wavelength of photon

Now put all the given values in the above formula, we get the energy of an atom.

$E=(6.626\times 10^{-34}Js)\times \frac{2.998\times 10^8m/s}{4.64\times 10^{-7}m}$

$E=4.28\times 10^{-19}J$

Therefore, the change in energy of an atom is, $4.28\times 10^{-19}J$

7 0

3 years ago

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