tnot the f is the volurn·in crn. of a 45.0 g piece of rne\'a. with a densitv or

Question

tnot the f is the volurn·in crn. of a 45.0 g piece of rne'a. with a densitv or 6.95 s/cm ? A. oa54 6.62 C 6.47 Which one of the following is an extensive property? Density Q3. D. Boiling point B. Color C Volume A. 24. Which one of the following is a chemical change? A. Formation of rust 8. Oxygen gas compressing to a liquid D. Melting of gold C. Water turning to steam as. Which one of the following is equal to 30 miles per hour? (1 mile -1.609 km) A. 13.4 meters per second B. 13.3 meters per second 13.9 meters per second 13.6 meters per second C. D. Q6. Which one of the following is composed of a single chemical substance? A. sea water B. glucose C. air D. alloy Which of the following is not an SI unit? liter B. meter C. kelvin D. second

Explanation / Answer

heterogenous mixture is not of uniform composition

2.density=mass/volume

volume=45/6.95=6.47 cm3

3.volume is the quantity and therefore it is an extensive property

4.formation of rust is a chemical change

in the case of physical change substance changes from one state to another state

5.30 miles=30*1.609 km=48.27*103 m

one hour=3600 sec

30 miles/hr=48.27*103 m/3600=13.4 m/sec

liter

6.glucose is single substance

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