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Archy [21]
3 years ago
13

If the roller coaster car in the above problem were moving with twice the speed (4m/s), then what would be its

Chemistry
1 answer:
OleMash [197]3 years ago
3 0

Explanation:

New kinetic energy= ½mv'²

v' =4m/s

m= 2000kg

KE = ½ (2000) (4)²

=16000 Joules

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if you had to live near a volcano would you rather live near an explosive or nonexplosive volcano?explain.
Andreas93 [3]
Non-explosive, so I wouldn't have to worry about is exploding at a random time and I would know I was safe.
6 0
3 years ago
Write the electronic configuration of the Na +, Mg2 +, Ca2 + and Rb + ions. Research the size of these ions in picometers and or
Sunny_sXe [5.5K]

Answer:

pen

Explanation:

3 0
3 years ago
How many atoms are in 3.5 moles of arsenic atoms?
solmaris [256]

Answer:

2.107×10²⁴

Explanation:

no of moles=no of particles/Avogadro's number

3.5=X/6.02×10²³

by cross multiplication

3.5×6.02×10²³

=2.107 ×10²⁴

5 0
3 years ago
Read 2 more answers
The taste of sour milk is lactic acid. What is the molecular formula for lactic acid if the percent composition is 40.00% C, 6.7
Svetradugi [14.3K]

Answer:

C3H6O3

Explanation:

To find the emperical of the compound,you divide the percentage composition of each element by it's molar mass(C=12, H=1, O=16).

For C,40/12=3.33. For H,6.71/1=6.71

For O,53.19/16=3.33.

Then divide everything by the smallest value which is 3.33

For C,3.33/3.33=1. For H,6.71/3.33=~2.

For O,3.33/3.33=1.

Emperical formula=CH2O

Molecular formula=(CH2O)n=90

(12+2*1+16)n=90

30n=90, n=3

molecular formula=(CH2O)3

molecular formula of lactic acid=C3H6O3.

4 0
4 years ago
KF is a strong electrolyte, & HF is a weak electrolyte. How are they different?
Vitek1552 [10]

The strong electrolyte KF completely dissociates into K+ and F- ions when it dissolves in water. When the weak electrolyte HF dissolves in water, there are a few ions of H+ and F- present, but mostly dissolved HF molecules. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

7 0
3 years ago
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