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Add the volumes

160g

158.2 g

So 160 * 1.00?

yes

so 160 g

yes 158.2 g

NB ( 1 cm^3 = 1 ml )

what does the NB stand for?

note well: \( 1\,[\text{cm}^3] = 1\,[\text{mL}]\))

Oh. Thanks.

OK, so you have (a),
what do you think about (b)?

would temperatures need to be added?

is temperature an extensive quantity, or intensive ?

intensive

right, so the temperature should become the average

(not the sum)

what is the average of 17°C and 17°C ?

17

makes sense?

not exactly

which bits are unclear?

how I am suppose to use the average to figure out the final temperature

i don't think you are expected calculate the temperature,
the temperatures are the same

so it would be 17 as the final?

Alright. That makes sense now.

Thanks.

If they were different temperatures, then the final temperature would be some in-between

Gotcha. It makes sense now.

so what do you got for (c) ?

You would multiple the final mass by the density to get volume.

which gives 160

So 160/160 = 1.00g/mL

you don't have you multiply or divide to get (c),

why would we need to know the temperature for the final density?

because the density of water is temperature dependent

Okay. Because of the intensive and extensive

So you only have to look at it? Not do any math?

what makes you realize that?

it's given in the question

Yeah.

because intensive is independent?

Yes, intensive properties are independent of the amount we have

That makes sense now.

Thank you again for the help.