<span>A. Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.</span>
Answer:
The correct answer is option B. From 200K to 400K
Explanation:
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Let's solve this!
The ideal gas equation is the following PV = nRT
Where the variables are:
P: pressure
T: temperature
V: volume
R: universal constant of ideal gases
n: number of moles
We see in the equation the proportional relationship of volume with temperature.
We deduce that if the volume increases twice, then the temperature increases twice.
The temperature has to be in Kelvin, that's why we chose that answer.
Of the options, the correct answer is option B. From 200K to 400K
The answer is D
Sodium loses an Electron and chlorine gains one
Basically; because a balanced equation will show how many molecules of one compound will react with how many molecules of another. This can be stated as the number of moles of one compound that will react with a given number of moles of another. You need to know the number of moles; so that you can translate the number of grams of one compound into moles; and then you can convert the number of moles of another into grams. eg: hydrogen combining with oxygen to produce water H2 + O2 = H2O Balanced equation: 2H2 + O2 = 2H2O Two moles of hydrogen react with one mole of oxygen If we have 8 grams of oxygen Molecular mass O2 = 32 (ie, 2x16) 8/32 = 1/4 mole O2 therefore, if 2 moles of hydrogen combine with one mole oxygen; 1/4x2 moles H2 combine with 1/4 mole O2 1/4X2 = 1/2 mole H2 Molecular mass H2 = 2.016 1/2 mole = 1.008g Therefore 1.008 g H2 reacts with 8 grams O2
