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aalyn [17]
3 years ago
10

Plz help! It takes a car going 40 mph 3 seconds to come to a stop. What is the acceleration?

Chemistry
1 answer:
lana66690 [7]3 years ago
3 0

Answer:

6 second???

Explanation:

Im so sorry if thats wrong!!!!

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How many representative particles are in one mole of CO2? PLEASE ANSWER ALMOST DUE
igor_vitrenko [27]

Answer:

I hope this helps, sorry if it doesnt. Not really good with chemistry, hope you have a great day/night :}

Explanation:

A mole (mol) is the amount of a substance that contains 6.02 × 10 23 representative particles of that substance.

12.00 g C-12 = 1 mol C-12 atoms = 6.022 × 1023 atoms • The number of particles in 1 mole is called Avogadro's Number (6.0221421 x 1023).

7 0
3 years ago
What dose the atomic number of an element represent
lianna [129]

Answer:

No. of electrons of the element

8 0
3 years ago
What is the molarity if 6664 grams of boron iodide is dissolved in 5.25 liters of water?
Virty [35]

Answer:

3.24 mol/L

Explanation:

Given that:

mass of Boron triiodide = 6664 grams

molar mass of BI_3 = 391.52 g/mol

Recall that:

number of moles = mass/molar mass

∴

number of moles = 6664 g /391.52 g/mol

number of moles = 17.02 mol

Also;

Molarity = moles for solute/liter for solution

= 17.02 mol/5.25 L

= 3.24 mol/L

4 0
2 years ago
Define the following terms: i) Rigidity ii) Compressibility and iii) Density
Nutka1998 [239]
Rigidity is the inability to bent or be force out of shape while compressibility is the ability to be flattened, pressed or squeezed into a smaller piece.
density is the degree of compactness of a substance.
3 0
3 years ago
The ph of a 0.15 m aqueous solution of naz (the sodium salt of hz) is 10.7. what is the ka for hz?
andrew-mc [135]

Answer:  
NaZ + H2O <----> HZ + OH- 
 [OH-] = [HZ] 
 [NaZ] = 0.15 M 
 pH = 10.7, so the pOH = 14-10.7 = 3.3; [OH-] = 10^-3.3 = 5.01E-4 
 kb = [OH-][HZ]/[NaZ] = (5.01E-4)^2/0.15 = 1.67E-6 
 ka = kw/kb = 1E-14/1.67E-6 = 5.99E-9 = 6.0E-9
5 0
3 years ago
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