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olya-2409 [2.1K]
3 years ago
14

Can someone please help me with this question??

Chemistry
1 answer:
dsp733 years ago
5 0
I think the answer is b
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Determine the kinetic energy of a 150 kg roller coaster car that is moving with a speed of 15 m/s
morpeh [17]

Answer:

K.E = 19125 j

Explanation:

Given data:

Mass = 150 Kg

Speed of car = 15 m/s

K.E = ?

Solution:

Formula:

K.E = 1/2 (mv²)

K.E = Kinetic energy

m = given mass

V = speed

now we will put the values in formula.

K.E = 1/2 (mv²)

K.E = 1/2 (150 Kg) (15²)

K.E = 1/2 150 Kg × 225 m²/s²

K.E = 0.5 × 225 m²/s² ×150 Kg

K.E = 19125 j

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3 years ago
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3 0
3 years ago
Moles of Zn(NO3)2 in 131.50g of this substance.
Degger [83]
<span>number of moles= mass / molecular mass
mass=131.50g
molecular mass of Zn(NO3)2 =189.39 g/mol
number of moles = 131.50 g/189.39 g/mol =0.69433 mol</span>
3 0
4 years ago
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Im doing a science project and need examples and non-examples of an Atom. some examples of an atom is neon, hydrogen, argon, etc
gogolik [260]

Answer:

Anything not on the periodic table is an element non example! ... So, for a substance to be an element, all of its atoms must have the same number of protons. Examples of elements include hydrogen, lithium, nickel, and radium.

Explanation:

6 0
3 years ago
Tin reacts with fluorine to form two different compounds, A and B. Compound A contains 38.5 g of tin for each 12.3 g of fluorine
Hatshy [7]
Tin to Fluorine mass ratios:
1) For compound A:
38.5/12.3
= 3.13
2) For compound B:
56.5/36.2
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The lowest whole number mass ratio is 2. It cannot be 1 because it is less than that required for compound B.
5 0
3 years ago
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