I JATW THAT I NEED TO ANSWER TO ASK
In a chemical formula, subscripts indicate the elements' ratio. Changing the subscripts would change the identity of the chemical. For example CO2 = carbon DIoxide, but CO = carbon MONoxide.
Answer: SnO2 + 2 H2 = Sn + 2 H2O
Explanation: I used a balance equation website. It's called WebQC if you want to check it out for future help.
Answer:
462g
Explanation:
First, let us calculate the molar mass of Cu(CN)2. This is illustrated below:
Molar Mass of Cu(CN)2 = 63.5 + 2(12+14) = 63.5 + 2(26) = 63.5 + 52 = 115.5g/mol
Number of mole of Cu(CN)2 given from the question = 4moles
Mass = number of mole x molar Mass
Mass of Cu(CN)2 = 4 x 115.5
Mass of Cu(CN)2 = 462g
Answer:
See explanation
Explanation:
All gases are held together by weak dispersion forces. One would now ask; Since the electronegativity difference between carbon and oxygen is about 1.0 while the electronegativity difference between two oxygen atoms is 0.0, why are they both gases at room temperature?
The answer lies in the recognition of two facts;
1) The dipole moment is a vector quantity so we also consider its direction
2) possession of polar bonds does not necessarily make a polar molecule.
We all know that a polar molecule will have greater intermolecular forces between its molecules and will most likely be a liquid instead of a gas. However,if we look at the overall dipole moment in CO2, we will notice that the direction of the dipole moment due to the two C-O bonds are opposite to each other hence they cancel out each other leaving the CO2 molecule with a zero effective dipole moment just as oxygen gas.
Hence, possession of polar bonds does not necessarily make a polar molecule. Therefore both oxygen and CO2 are gases at room temperature.