Explanation:
K2O Now the cation is the element at the front so it would be K2 because the 2 belongs with the K which is Potassium and now Anion is the last element O for oxygen
Galaxies are the lump of matter. The shape of major galaxies is spiral shape. Thus, the given statement is false.
<h3>What are the shapes of galaxies?</h3>
The galaxies are the lump of dust and mass, held together by the gravitational force. The galaxies are continuously moving in the universe.
The formation of galaxies is believed to be due to the force of attraction between the components.
The shape of major galaxies is assumed to be spiral-shaped, however, the irregular shape galaxies are also present.
Thus, the given statement about the shape of galaxies is false.
Learn more about galaxies, here:
brainly.com/question/2905713
<span> Pb(NO3)2 + 2 NaBr ------> PbBr2 + 2 NaNO3
2 mol 2 mol
M(NaBr)= 102 g/mol
M(NaNO3) = 85 g/mol
1) 244g NaNO3 *1 mol NaNO3/85 g NaNO3 = 244/85 mol NaNO3
2)</span> Pb(NO3)2 + 2 NaBr ------> PbBr2 + 2 NaNO3
2 mol 2 mol<span>
x mol </span>244/85 mol
<span>
x=(2 mol*</span> 244/85 mol )/2 mol = 244/85 mol NaBr
<span>
3) </span> 244/85 mol NaBr*102g NaBr/1 mol = (244*102/85) g NaBr =292.8 g NaBr<span>
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