mccarthyrookie6491

22.10.2019 • 

Chemistry

The bright light emission spectrums below are seen through a spectroscope. the unknown sample is a mixture of the observed gases. 5 rectangles labeled gas w, gas x, gas y, gas z and unknown sample. gas w has 2 black lines left of center and 2 black lines close together right of center. gas x has two black lines on the far left one on the far right and one on either side of center. gas y has one black line on either side of the center and one black line further right. gas z has one black line on the far left, one in the center and 2 on the right. the unknown sample has one black line on the far left, one in the center, one on either side of center and 2 on the right. which gases are found in the unknown sample? gases w and z gases x and y gases w and y gases z and y

Ответ:

ryrytkg8091

15.02.2022

Chemistry

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The  molarity  of  aqueous   solution  containing  40.0g  of  glucose  in  1.5 L  of   solution  calculated  as  follows

molarity  = moles/volume  in  liters

find  the  moles  of  glucose  = mass  /molar  mass
=  40/  180.06  =  0.222 moles
 molarity  is  therefore = 0.222/1.5 =  0.148 M

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