Answer:
1. False
2. True
3. True
4. True
5. True
6. True
7. True
8. False
9. True
Explanation:
Density is a physical property since its measurement does not involve any chemical process.
Since transition elements exhibit variable oxidation states, the actual oxidation state of the transition element must be specified in the compound.
Due to the fact that neutron has no charge, it was discovered by Chadwick long after the electron and proton were discovered.
The balancing of chemical reaction equations is a demonstration that atoms are neither created no destroyed. It also shows that mass is neither created nor destroyed in chemical reactions.
When a gas is heated, it expands. Its volume and its kinetic energy increases. Since volume and pressure are inversely proportional (Boyle's law) the pressure decreases.
Enthalpy is said to be an extensive property. This implies that the magnitude of change in enthalpy is known to depend on the amount of reactants that is actually reacted.
The combined gas law is applicable to all ideal gas systems irrespective of their individual chemical formulas.
10g of CO2 contains 0.227 moles of CO2 while 10g of NO contains 0.33 moles of NO hence 10.0 g of NO will contain more molecules than 10.0g of CO2.
If a sample is not at absolute zero, the particles are known to possess kinetic energy which decreases continuously until absolute zero is attained.
Platinum:
850 Platinum: 85% platinum
950 Platinum: 95% platinum
900 Platinum: 90% platinum
Gold:
24 karat: 99.9% gold; the purest form.
22 karat: 91.7% gold
18 karat: 75% gold
14 karat: 58.3% gold
10 karat: 41.7% gold
Answer:
52.17%
Explanation:
COCl2.6H20
C=12,O=16,Cl=35.5,H=1
Relative molecular mass of COCl2.6H2O= 12+16+71+6(2+16) = 99 + 108= 207g
Relative molecular mass of 6H2O = 108g
Percentage of water = (108/207 )*100
= 52.17%
When acids react with water, H ions are released which then combine with water molecules to form H₃O⁺
There are three different forms of potential energy. The rock hanging above the ground has a form of stored energy called gravitational potential energy. This form of energy is due to the downward pull of Earth's gravity. ... When you stretch a rubber band, the elastic potential energy of the rubber band increases.
