students use a balance to determine the mass of a marble is 7.5 grams. a graduated bottle contains 10.0 milliliters of water. when the marble is carefully into lowered the graduated bottle and is completely covered with water the volume of the water containing the marble has increased to 12.5 milliliters. find the density of the marble

the answer is the first option

explanation:

just googled it m8. not that hard

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metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)

option c: 1605.1 kj

the balanced chemical reaction for combustion of methane is as follows:

here, enthalpy formation of is -74.7 kj/mol, 0 kj/mol, -393.5 kj/mol and -241.82 kj/mol respectively.

the heat released or can be calculated as follow:

putting the values,

thus, heat released by combustion of 1 mol of methane is 802.54 kj/mol. thus, for 2 mol, heat released will be:

therefore, heat released by the combustion of 2 mol of methane is 1605.1 kj.