Answer:
Option B
Explanation:
When water changes its state, there will be no change in mass because mass is neither created nor it can be destroyed
When water changes its state, there will be no change in composition as well because composition change occurs when there is a chemical reaction and thus change in physical state does not affect its composition
When mass does not change, there will be no change in weight because weight = mass × acceleration due to gravity
As acceleration due to gravity does not change, therefore if mass does not change, there will be no change in weight
Density changes when there is a change in physical state because volume changes as there is a change in physical state and mass remains same
0.216g of aluminium compound X react with an excess of water water to produce gas. this gas burn completely in O2 to form H2O and 108cm^3of CO2 only . the volume of CO2 was measured at room temperature and pressure
0.108 / n = 24 / 1
n = 0.0045 mole ( CO2 >>0.0045 mole
0.216 - 0.0045 = 0.2115
so Al = 0.2115 / 27 => 0.0078 mole
C = 0.0045 * 1000 => 4.5 and Al = 0.0078 * 1000 = 7.8
The number of <u>protons</u> in the nucleus determines an element's atomic number.
Answer:
HNO3
Explanation:
Try looking up on the internet-
"Science compound creator" and plug in the compounds it gives, and it will give you a formula.
1-<span>Largest planet in the solar system
2-</span><span>Has no moons
3- True
4-</span><span>They orbit the sun
5- Earth
6-</span><span>They orbit the sun.</span>
