Asample of metal has a mass of 34.65 g. when placed in a graduated cylinder containing 20 ml of water, the water level rises to 23.3 ml. which of the following metals is the sample made from: silver, which has a density of 10.5 g/cm3; tin, which has a density of 7.28 g/cm3; or titanium, which has a density of 4.5 g/cm3?

- The sample is made from silver, which has a density of .

Solution:- Mass of the metal is 34.65 gram. Volume of water in the graduated cylinder is 20 mL. When the metal is placed in the cylinder filled with water, the water level rises to 23.3 mL.

So, the volume of the metal = 23.3 mL - 20mL = 3.3 mL

Now, we have the mass and volume of the metal, so it's density could easily be calculated by using the density formula:

since,

So, density =

Hence, the sample is made from silver, which has a density of .

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates