The normal core temperature of the human body is 98.60degreeF. This temperature,

Question

The normal core temperature of the human body is 98.60degreeF. This temperature, expressed according to the kelvin scale, is: 37.00 K 72.56 K 119.88 K 236.15 K 310.15 K 393.03 K A cube of the element osmium is found to have a length of 5.00 mm. The density of osmium is 22.48 g.mL^-1. The mass of the osmium is: 0.222 g 2.81 g 5.56 g 11.2 g 44.65 g 179.8 g A certain atom has an atomic number of 83 and a mass number of 209. It forms an ion with a charge of 5+. This ion has: 83 neutron and 80 electrons 83 neutrons and 78 electrons 126 neutrons and 78 electrons 126 neutrons and 80 electrons 126 neutrons and 83 electrons

Explanation / Answer

1) answer : e) 310.15 K

2) answer : b ) 2.81 g

length = 5 mm = 0.5 cm

volume = a^3 = 0.5^3 = 0.125 cm^3

density = 22.48 g / mL

mass = density x volume

= 22.48 x 0.125

= 2.81 g

3)

answer : C) 126 neutrons , 78 electrons

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