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lisabon 2012 [21]
2 years ago
13

Which of the following statements is true?

Chemistry
1 answer:
tiny-mole [99]2 years ago
8 0
Statement A is true
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What evidence is there that all state of matter have mass
katovenus [111]

Answer:

Matter is the "stuff" that makes up the universe everything that takes up space and has mass is matter.

All matter is made up of atoms, which are in turn made up of protons, neutrons and electrons

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3 years ago
Which of the following sequences describe how a four stoke engine cycle powers the engine
Vera_Pavlovna [14]

A four cycle engine works with 4 basic steps to a successful rotation of the crankshaft: the intake, compression, power and exhaust stroke. Each engine cylinder has four openings for the intake, exhaust, spark plug and fuel injection. ... The compression makes the air-fuel combination volatile for easier ignition.

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3 years ago
The mass of an electron is 9.11× 10–31 kg. What is the uncertainty in the position of an electron moving at 2.00 × 106 m/s with
Kruka [31]
Just use the Heisenberg Uncertainty principle: 

<span>ΔpΔx = h/2*pi </span>

<span>Δp = the uncertainty in momentum </span>
<span>Δx = the uncertainty in position </span>
<span>h = 6.626e-34 J s (plank's constant) </span>

<span>Hint: </span>

<span>to calculate Δp use the fact that the uncertainty in the momentum is 1% (0.01) so that </span>

<span>Δp = mv*(0.01) </span>

<span>m = mass of electron </span>
<span>v = velocity of electron </span>

<span>Solve for Δx </span>

<span>Δx = h/(2*pi*Δp) </span>

<span>And that is the uncertainty in position. </span>
6 0
3 years ago
Which tool can be used to measure the volume of a liquid to one decimal place?
pentagon [3]
The tool to measure the liquid is a measuring cylinder.
3 0
2 years ago
Read 2 more answers
1 What direction do<br> molecules move in?
notsponge [240]

Answer:

The majority of the molecules move from higher to lower concentration, although there will be some that move from low to high. The overall (or net) movement is thus from high to low concentration.

hope this helps!<3

3 0
2 years ago
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