<span>Yes, mass is conserved. When sodium hydroxide (clear solution) and copper sulfate (blue solution) are mixed, they form a copper hydroxide (a blue solid) and sodium sulfate (a clear solution).
This can be tested simply. First weigh the masses (10 g and 57 g, which totals 67 g)) of the two starting solutions prior to mixing. Then mix and allow the reaction to occur and weigh the mass of the mixture (10g + 57 g = 67 g). The two solutions should have the same mass and therefore demonstrate conservation of mass.</span>
When radioactive decay causes loss of one or more protons, a new element is formed. Radioactive decay is the spontaneous disintegration of an unstable atom as it losses energy and transforms itself. As the protons are lost the atom becomes smaller. Radioactive decay usually results from electromagnetic radiation or/and emission of particles.
B) is a right answer because molar mass equal molecular atomic mass meaning Ar(Na)=23 and so M(Na)=23 as well.
The answer is using a beam of particles and detecting the scattering of particles after they hit gold foil.
Answer:
NH3 , SO3 , BF3
Explanation:
trigonal planar = AB3 ------------> Coordination number = 3
for example = NH3 , SO3 , BF3
all of them are trigonal planar