To find<span> the </span>valence electrons in an atom<span>, identify what group the element is in. An element in group 1A has 1 </span>valence electron<span>. For example, Li is in group 1A, so that means it has one </span>valence electron. If the element is in group 2A, then it has two valence electrons<span>.</span>
A closed system is completely closed to the outside environment. Every interaction is transmitted inside that closed system.
H2S hydrogen sulfide gas has a higher lattice energy because
Formula: H2S
Molar mass: 34.1 g/mol
Boiling point: -76°F (-60°C)
Melting point: -115.6°F (-82°C)
Density: 1.36 kg/m³
Soluble in: Water, Alcohol
The density of the solid object will be 2.63 g/mL
<h3>What is density?</h3>
Density of objects = mass/volume.
Recall that an object will always displace its own volume when placed in a liquid.
Volume of the solid object = Cylinder reading after immersing the object in the water - cylinder reading before immersing the object in the water.
= 48.1 - 20.4
= 27.8 mL
Mass of the solid object = 73.05 g
Density of the object = 73.05/27.8
= 2.63 g/mL
More on density can be found here: brainly.com/question/15164682
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