Why is the use of road salt in winter impractical in many northern communities?

The use of road salt in winter is impractical in many northern communities because the temperatures can be too low for the salt to do its job.

Salt lowers the melting point of ice, but it loses its effectiveness when the temperatures drop below about -15 °C.

The winter temperatures in Winnipeg, Canada often drop below -30 °C. Road salt has no effect on ice at those temperatures.

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atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer