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In the winemaking industry, laboratory procedures are employed in
determining the right concentration of wine for safety purposes. For example,
to analyze the alcohol content of a certain wine, a chemist needs 1.00L of an
aqueous 0.200 MK2Cr207 solution. How much solid
K2Cr207 must be weighed out to make this solution?​

Sagot :

BinibiningYanidn

Answer:

Polonium

Explanation:

Polonium is so radioactive it glows blue, which is caused by excitation of the gas particles by radiation. A single milligram of polonium emits as many alpha particles as 5 grams of radium. It decays to release energy at the rate of 140W/g. The decay rate is too high that it can raise the temperature of a half gram sample of polonium to over 500°C and subject you to a contact gamma-ray dose rate of 0.012 Gy/h, which is more than enough radiation to kill people.

Réponse publiée par: reyquicoy4321

(C) Hydrogen bonding.

▪ Hydrogen bond causes the attraction between water molecules.

▪ Inner molecules are attracted evenly from alld irections. But surface molecules have unbalanced force caused by inner pulling. This is surface tension.

▪ Thus causes the net upward force in upper layer of water. This helps striders to walk on water.

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