Can someone please help me with these:
3. Dissolving salt in water is a physical change- False?
'Place the letter of the item in Column II before its best match in Column I'
Column 1:
41. Unit of volume
42. unit of mass
43. unit of temperature
44. unit of density
45. .01 of a meter
Column II:
a. grams
b. grams/cm^3
c. Kelvin
d. milli
e. cubic meter
f. centimeter
I've guess for these 3:
41- a/b
42- a/b
43- c
Don't know about the rest. please help.
Thanks
-MC
Most would agree that dissolving is a physical change.
YOu missed all the units. You need to restudy the definitions of volume, mass, density, centi
Sure! I'll be happy to help you with these questions.
1. Dissolving salt in water is a physical change. - False
Explanation: When salt dissolves in water, it undergoes a physical change because the salt particles mix with the water particles, forming a homogeneous mixture. No new substances are formed during this process. It is important to note that dissolving is a physical change, whereas a chemical change involves the formation of new substances with different properties.
Regarding the matching exercise:
Column I:
41. Unit of volume
42. Unit of mass
43. Unit of temperature
44. Unit of density
45. .01 of a meter
Column II:
a. grams
b. grams/cm^3
c. Kelvin
d. milli
e. cubic meter
f. centimeter
Your guesses:
41 - a/b
42 - a/b
43 - c
Here are the correct matches:
41. Unit of volume - e. cubic meter
Explanation: Cubic meter is the base unit of volume in the metric system.
42. Unit of mass - a. grams
Explanation: Grams is a unit of mass commonly used in the metric system.
43. Unit of temperature - c. Kelvin
Explanation: Kelvin is the base unit of temperature in the International System of Units (SI).
Now, let's complete the remaining matches:
44. Unit of density - b. grams/cm^3
Explanation: The unit grams/cm^3 represents the density of a substance in the metric system.
45. .01 of a meter - f. centimeter
Explanation: A centimeter is a unit in the metric system, and .01 of a meter is equivalent to one centimeter.
So, the complete matching for Column I and Column II is as follows:
41. Unit of volume - e. cubic meter
42. Unit of mass - a. grams
43. Unit of temperature - c. Kelvin
44. Unit of density - b. grams/cm^3
45. .01 of a meter - f. centimeter
I hope this helps! Let me know if you have any more questions.