1. 30.0 ml of ethyl alcohol(density=0.790g/ml)are added to a graduated cylinder that weighs 44.28 grams. what will be the mass of the graduated cylinder plus the alcohol(in grams)?

2. what is the volume (in ml)of a liquid(density=2.07 g/ml)weighing 130.grams?

To find the mass of the graduated cylinder plus the alcohol in the first question, we need to calculate the mass of the alcohol first and then add it to the initial mass of the graduated cylinder.

1. Mass of ethyl alcohol = volume of alcohol x density
= 30.0 ml x 0.790 g/ml
= 23.7 grams

2. Mass of graduated cylinder plus alcohol = initial mass of graduated cylinder + mass of alcohol
= 44.28 grams + 23.7 grams
= 67.98 grams

Therefore, the mass of the graduated cylinder plus the alcohol will be 67.98 grams.

Now, let's move on to the second question. To find the volume of the liquid, we will divide its mass by its density.

2. Volume of liquid = mass of liquid / density
= 130 grams / 2.07 g/ml
= 62.8 ml

Therefore, the volume of the liquid will be 62.8 ml.