Answer:
50 formula units of NBr3 will yield 75 formula units of NaBr
57 formula units of NaOH will yield 57 formula units of NaBr
Explanation:
The equation of the reaction is ;
2NBr3 + 3NaOH – N2 + 3NaBr + 3HBrO
Number of formula units of NaBr formed when 50NBr3 reacts was obtained from;
2 formula units of NBr3 yields 3 formula units of NaBr
50 formula units of NBr3 will yield 50 ×3/2 = 75 formula units of NaBr
Hence 50 formula units of NBr3 will yield 75 formula units of NaBr
Then;
Since 3 formula units of NaOH yields 3 formula units of NaBr
57 formula units of NaOH will yied 57×3/3 = 57 formula units of NaBr
Hence 57 formula units of NaOH will yield 57 formula units of NaBr
Answer:
2 Atm; 2.016 g
Explanation:
Changing the volume without changing the temperature or mass only changes the pressure. Volume and pressure are inversely proportional so halving the volume will double the pressure.
P = 1 Atm, T = 0 °C are "standard" temperature and pressure (STP). The volume of 1 mole of gas is 22.4 L under these conditions. That means the amount of hydrogen gas in the cylinder is 1 mole, so has a mass of 2.016 g.
After the volume reduction, the pressure is 2 Atm, and the mass remains 2.016 g.
Water has a molar mass of 18.015 g/mol . This means that one mole of water molecules has a mass of 18.015 g . So, to sum this up, 6.022⋅1023 molecules<span> of water will amount to 1 mole of water, which in turn will have a mass of 18.015 g . 2.7144moles H2O ⋅</span>6.022<span>⋅1023molec.1mole H2O =1.635⋅1024molec.</span>
<u>Answer:</u> D. the ionic compound calcium fluoride
The correct option here is the fourth one.
<u>Explanation:</u>
Salt like compounds addition to water is likely to be inducing certain changes in temperature of freezing into solid and also alter the temperature of boiling.
It is noticed that addition of salts in water mostly tends to get lower the freezing temperatures from the original freezing point of water and among the given 3 options calcium fluoride tends to lower the freezing point most when compared to others.
Thus as vant hoff factor is highest factor for and the freezing point will be lowest.
Brønsted Lowry acid is a proton donor (PD), while a Brønsted-Lowry base is a proton acceptor (PA).
Hopefully this helps