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Calculate the atomic mass of element “X,” if it has 2 naturally occurring isotopes with the following masses and natural abundances.   X-45 44.8776 amu 32.88% X-47 46.9443 amu 67.12%

The temperature rises from 25.00°C to 29.00°C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. Calculate ΔErxn for the combustion of sucrose in kJ/mol sucrose. The heat capacity of the calorimeter is 4.90 kJ/°C. The molar mass of sugar is 342.3 g/mol. (10 pts)

Under the Abbasids and Harun-al-Rashid, what role did the city of Baghdad play in the caliphate?

A sample of hydrogen collected by displacement of water occupied 30.0 mL at 24.0°C on a day when the barometric pressure was 736 torr. What volume would the hydrogen occupy if it were dry and at STP? The vapor pressure of water at 24.0°C is 22.4 torr.  (10pts)

Explain why you selected the answer above. 

Which of the following best describes this exercise? Watch Media Name: Q10 video 1.MOV (00:11) Duration: 00:11 Added: 09 May 2020 07:40 PM Added By: Oladipo Eddo Description:   Tags:  

Even before the discoveries of Columbus, Europeans participated in the world economy through which merchants?

In a plyometric drill, the time from the end of eccentric phase to initiation of the concentric contraction is known as

Prince Shotoku’s reforms of Japan including adopting what administrative ideas from China?

Which plyometric exercise would be classified as more advanced?   Watch Media Name: Q18 video 2 (00:05) Duration: 00:05 Added: 09 May 2020 07:59 PM Added By: Oladipo Eddo Description:   Tags:   Watch Media Name: Q18 video 1.MOV (00:09) Duration: 00:09 Added: 09 May 2020 07:58 PM Added By: Oladipo Eddo Description:   Tags: