All atoms of the same element have the same

1. atomic number?

2. atomic mass

3. number of neutrons

4. mass number

Given: CH4 + 2O2 → CO2 + 2H2O, ΔH = - 890 kJ/mol How much energy is released when 59.7 grams of methane (CH4) reacts with oxygen? The combustion of 59.

How does water vapor makes clouds

Explain why mixing of red paint with white paint does not constitute a chemical reaction even though the product has a different appearance

What is the frequency of a 670 nm light wave? 4.5 x 106 s-1 2.2 x 106 s-1 2.2 x 1014 s-1 4.5 x 1014 s-1

For the reaction? Fe+? H2o ⇀↽? Fe3o4+? H2, a maximum of how many grams of fe3o4 could be formed from 354 g of fe and 839 g of h2o? Answer in units of g

Dominic and Eva are using the same type of stopwatches to measure the time it takes for a chemical reaction to occur. They each use the same stopwatch to measure the time.

An electronic circuit element consists of 23 mg of silicon. An electric current through the circuit adds heat at a rate of 7.4 x 10-3 J/s.

If an object sinks in water it's density is less than that of water true or false

What is the main link between water in the oceans and on land

Which of the following pairs lists a substance that can neutralize H2SO4 and the salt that would be produced from the reaction? CaOH2 and Ca (SO4) 2 LiOH and Li2SO4 NH4 and NH4SO4 NH3 and (NH3) 2SO4