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babunello [35]
3 years ago
13

What describes a change in velocity?

Chemistry
2 answers:
Oksi-84 [34.3K]3 years ago
7 0

Velocity is the displacement made per unit of time.

If direction or speed of the object change it causes change in velocity.

Acceleration is the term used for measuring the change of velocity. Acceleration is the change of velocity per unit of time.

siniylev [52]3 years ago
4 0
Acceleration can be described as changes in speed, changes in direction, or changes in both. Acceleration is a vector.
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If 11g of a gas occupies 5.6dm'3at s.t.p., calculate it's vapour density (1.0mol of a gas occupies 22.4dm'3at s.t.p.).​
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{ \boxed{ \bf{vapour \: density = 2 \times molecular \: mass}}} \\{ \tt{ PV= (\frac{m}{ m_{r}}) RT}} \\ { \tt{3 \times 5.6 =  \frac{11}{m _{r}}  \times 0.0831 \times 273}} \\ { \tt{m _{r} = 14.85 \: g}} \\  \\ { \bf{vapour \: density = 2 \times m _{r}}} \\  = 2 \times 14.85 \\  = 29.7 \: { \tt{g {dm}^{ - 3} }}

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A sample of lemon juice is found to have a pH of 2.3. What is the concentration of hydrogen ions in the lemon juice?
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3 years ago
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