1) Both carbon dioxide and water are pure substances. How are they similar to each other?
A. both substances have a set ratio of atoms that cannot be separated by physical means.
B. both substances have a set ratio of atoms that can be separated by physical means.
C. both substances have the same physical and chemical properties.
D. both substances have the same physical properties, but different chemical properties.
2) Felipe made a toy boat out of clay, but it kept sinking in water. He changed the boat's design by making it slightly wider than before. Why did Felipe's newly designed boat float on water?
A. He decreased the density by increasing the volume.
B. He decreased the density by decreasing the volume.
C. He increased the density by increasing the volume.
D. He increased the density by decreasing the volume.
My Answer is:
1~ C.) both substances have the same physical and chemical properties.
2~ C.) He increased the density by increasing the volume.
1.a
2.a
3.d
4.d
5.b
6.c
7.b
8.a
9.b
10.b
11.c
12.d
13.b,c,e
14.a
15.c
I went with Jay's answers and got 2 questions wrong, they must of changed them but here yall go.
1 Both substances have a set ratio of atoms that cannot be separated by physical means
2. He decreased the density by increasing volume
3. Matter
4. Physical property
5. 0.20g/ml
6. Chemical property
7. Particle vibration decreased
8. the masses are equal
9. atoms
10. oil and water
11. pure substance
12. The temperature of the object is increasing while the temperature of the water is decreasing
13. The particles of substance A are more tightly held together than the particles of substance B, The particles of substance A vibrate less than the particles of substance B, Substance A has a definite shape and substance B does not
14. viscosity
15. 3,5,6,1,2,4
1) The correct answer is actually A.) Both substances have a set ratio of atoms that cannot be separated by physical means.
Explanation:
Carbon dioxide (CO2) and water (H2O) are both examples of pure substances because they consist of only one type of molecule. In both cases, the atoms in each molecule are chemically bonded to form a specific ratio. This means that the composition of the molecules cannot be separated by physical means such as filtration or evaporation.
2) The correct answer is A.) He decreased the density by increasing the volume.
Explanation:
The buoyancy of an object in water depends on its density relative to the density of water. If an object is less dense than water, it will float. On the other hand, if it is more dense, it will sink.
By making the boat slightly wider, Felipe increased its volume while keeping the mass (amount of clay) constant. Increasing the volume while keeping the mass constant decreases the density of the boat. As a result, the newly designed boat became less dense and was able to float on water.
See your posts above.
So Sorry!!!
Wait y no right answers, tf? just:
See Your posts above ~DrBob222
sorry!!! ~Sandy
check my work ~Sandy Lover