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N76 [4]
3 years ago
9

Molecules are packed tigghtly together

Chemistry
1 answer:
Tju [1.3M]3 years ago
4 0
Yes molecules are tightly together. Hope this helps
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The 54.9-g sample of the compound X2O7 contains 33.6 g of oxygen atoms. What is the molar mass of element X?
vazorg [7]
Mass of X₂O₇ = 54,9g

2x + 33,6g = 54,9g
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2x = 21,3g  | :2
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7 0
3 years ago
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A nuclear waste site. cesium-137 is a particularly dangerous by-product of nuclear reactors. it has a half-life of 30 years. it
hram777 [196]
The mass decay rate is of the form
m(t) = m_{0} e^{-kt}
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k = the decay constant
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m = 3000 e^{-0.0231*60} = 750 \, g

Answer: 750 g

4 0
3 years ago
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It is water soluble so is also soluble in aqueous solutions of NaOH or NaHCO3.
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