At night we realese carbon dioxside what change of matter is shown
1 answer:
- A carbondioxide being released into the atmosphere is a chemical change.
- Chemical Change occurs when new materials are formed by a change in the way the atoms are bonded together.
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Explanation: 120mL/300k=v2/320k
Metal.
Zn + 2HCl = ZnCl₂ + H₂(gas)
Answer: 104 KJ mol
Each NH3 has 3 N-H bonds
Explanation:
Enthalpy change(DHo)= sum t enthalpy of products - sum of enthalpy of Reactants
DHo= 2x3 dHo (N-H) - {dHo(N2)+3dHo(H-H)}
= 6(391)-(945+3(432))
=2346-(945+1296)
=2346-2241
DHo= 105 KJ/mole
Gas pressure is measured in mmHg with a barometer
Answer:
Gold
Explanation:
We are given that
Mass of sample ,m=385 g
Volume ,V=20mL
We have to find the coin is gold or yellow brass.
We know that
Density=
Using the formula
Density of coin=19.3g/mL
Density of gold=19.3g/mL
Hence, the coin is gold.
