![mbarron279542](/avatars/14379.jpg)
mbarron279542
04.02.2020 •
Chemistry
Can boiling change from a liquid to gas
Solved
Show answers
More tips
- S Science and Technology Colliders: How They Work and Why They Matter...
- C Construction and repair How to Choose the Best Underfloor Heating?...
- C Computers and Internet How to Get Rid of Windows Genuine Check?...
- C Computers and Internet War of Social Media: Which Platform is the Leader?...
- H Health and Medicine How to Treat the Flu: A Comprehensive Guide...
- O Other What is a Disk Emulsifier and How Does it Work?...
- F Family and Home What does a newborn need?...
- F Family and Home Choosing the Right Car Seat for Your Child: Tips and Recommendations...
- F Food and Cooking How to Get Reconfirmation of Registration?...
- C Computers and Internet How to Get Rid of Spam in ICQ?...
Answers on questions: Chemistry
- C Chemistry What is the reason for the trend in Atomic Radii? Select all that apply. A. number of valence electrons. B. number of neutrons in the nucleus C. number of protons in...
- C Chemistry Which of the following aspects of biotechnology is not considered to be a moral or ethical issue...
- C Chemistry Which of these trends increase as you move from left to right on the Periodic Table? Select all the apply. A. ionization energyB. electronegativityC. electron affinity...
- C Chemistry What causes metamorphic rocks to form from existing rocks? O magma and minerals O heat and pressure O exposure to Earth s mantle exposure to Earth s surface...
- C Chemistry Identifying the major species in weak acid or weak base equilibria...
- C Chemistry 2 Question 25 (Essay Worth 10 points) (02.05 MC) The complete orbital notation diagram of an atom is shown. 14 ANAMNE Based on the diagram, what values can be assigned...
- C Chemistry Harry vs Draco who would you want to date more (for me its harry)...
- C Chemistry Protons-29 Neutrons 35 electrons-29 Atomic Mass-64...
- H History In the 1850 southern argued that the slaves were treated better than laborers in the northern...
- H History One negative consequence of the creation of the aswan dam has been a. a reduced ability to produce electricity b. the reduced length of the agricultural growing season...
Ответ:
Ответ:
1. number of Cd atoms = 4.384 × 10²³
2. number of moles of Ti = 0.817 mol
3. molar mass of C₇H₆O₃ = 138.077 g/mol
4. moles of Sildenafil = 0.249 mmol
Explanation:
1. given data
mass of Cd = 81.8 g
number of Cd atoms = ?
molar mass of Cd = 112.411 g/mol
Solution
1st we find out the number of moles of Cd
number of moles = mass / molar mass
number of moles of Cd = 81.8 g / 112.411 g.mol⁻
number of moles of Cd = 0.728 mol
Now we find out the number of Cd atoms
number of atoms = moles × 6.022 × 10²³
number of Cd atoms = 0.728 (6.022 × 10²³)
number of Cd atoms = 4.384 × 10²³
2. Given data
Mass of Ti = 39.1 g
moles = ?
molar mass Ti = 47.867 g/mol
Solution
Now we will find out the number of moles
number of moles = mass / molar mass
number of moles of Ti = 39.1 g / 47.867 g.mol⁻
number of moles of Ti = 0.817 mol
3. Given data
chemical formula of Salicylic acid = C₇H₆O₃
molar mass of salicylic acid = ?
molar mass of carbon = 12.011
molar mass of hydrogen = 1.008
molar mass of oxygen = 15.999
molar mass of molecule = number of moles of atoms × molar mass of atoms
molar mass of C₇H₆O₃ = 7 (12.011) + 6 (1) + 3 (16)
molar mass of C₇H₆O₃ = 84.077 g + 6 g + 48 g
molar mass of C₇H₆O₃ = 138.077 g/mol
4. Given data
molar mass of Sildenafil = 474.5828 g/mol
mass given = 0.118 g
moles of Sildenafil = ?
Solution
Now we find out the number of moles
number of moles = mass / molar mass
number of moles Sildenafil = 0.118 g / 474.5828 g/mol
number of moles Sildenafil = 0.0003 mol
as this is very small amount we convert it into millimoles
millimoles = moles × 1000
millimoles of Sildenafil = 0.000249 × 1000
millimoles of Sildenafil = 0.249 mmol