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Mariulka [41]
3 years ago
6

Science 8- please help! :)

Chemistry
2 answers:
sesenic [268]3 years ago
8 0
I don’t know I just need points
Kamila [148]3 years ago
4 0
Draw the two atomic structures and then focus in on the electrons either gaining or losing and draw them with arrows and dots
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What would happen to the rate of a reaction with rate law rate = k [NO]2[Hz] if
leonid [27]
The rate of a reaction with this rate law would increase by a factor of 4 if NO concentration were doubled.
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3 years ago
HELPPPP!!! I NEED HELP WITH SCIENCE
pentagon [3]

Answer:

Both are chemical changes.

Explanation:

They are chemical changes because when when you melt the sugar to make caramel a new substance is formed. The same with cookies. You don't start out with cookies, you start out with dough. And then when you cook the dough a new substance is formed which is the cookies.

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3 years ago
Which of the following symbol means a subtance is in water solutions?
tankabanditka [31]

Answer:

a.) (aq)

Explanation:

(aq) means aqueous

so its in a solvent

7 0
2 years ago
A 2.8-kg pile of aluminum (rho = 2.70 g/cm3) cans is melted, then cooled into a solid cube. What is the volume of the cube?
k0ka [10]

Answer:

Explanation:

mass of aluminum 2.8 kg = 2.8 x 1000 = 2800 g

ρ = density of aluminum given = 2.7 g / cm³

density = mass / volume

volume = mass / density

= 2800 / 2.7

= 1037 cm³

So volume of cube required = 1037 cm³.

8 0
3 years ago
How many particles are in chemicals
stepan [7]

Answer:

6.022 x 10^23 particles

Explanation:

Chemists have chosen to count atoms and molecules using a unit called the mole (mol), from the Latin moles, meaning “pile” or “heap.”

One mole is 6.022 x 10^23 of the microscopic particles which make up the substance in question.

Hope this helped! :^)

4 0
2 years ago
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