Part b and cHomework Answers
Molarity = no of moles / volume in liters
no of moles = Molarity x volume in liters
here M = 0.5 and V = 2L
moles = 0.5 x 2
= 1 mole
part C
no of moles = weight / molar mass of sucrose
= 342 / 342
= 1 mol
this is one mol and he has given one mole
so total 2 moles
A solution of concentration 1 mol/L is also denoted as 1 molar (1 M)
Molarity = 2 / 1 litere
= 2M
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How many moles of sucrose are contained in wach
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hi i need help with all three parts of the problem .
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How many moles of sucrose are contained in wach
solution.
hi i need help with all three parts of the problem .
Part A 3.2 L of a 0.105 M sucrose solution Express your answer using two significant figures. mol Submit Request Answer Part B 0.972 Lof a 2.58 M sucrose solution Express your answer using three significant figures. VO A D mol Submit Request Answer Part C 24.5 mL of a 0.558 M sucrose solution Express your answer using...
How many orams of Hs are needed to produce 13.84 g of NHs ? Express your answer numerically in grams. Hints 四] ? 0.813 g H2 Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining Part D How many molecules (not moles) of NHs are produced from 5.30x104g of H2? Express your answer numerically as the number of molecules. Hints 四] ? molecules Submit My Answers Give Up
Problem 31.14 - Enhanced - with Hints Part B The magnetic field of an electromagnetic wave in a vacuum is B,-(2.4pT) sin((1.00 x 107)z-wt), where z is in m and t is in s You may want to review ( pages 889-892) What is the wave's frequency? Express your answer to three signiticant tigures and include the appropriate units. Hints For help with math skills, you may want to review Rearrangement of Equations Involving Multiplication and Division f-Value Units Submit...
Part B How many grams of ice at -25.4 °C can be completely converted to liquid at 7.2 °C if the available heat for this process is 4.18*103 kJ? For ice, use a specific heat of 2.01 J/(g·°C) and ΔHfus 6.01kJ/mol. Express your answer to three significant figures and include the appropriate units Hints alue Units Submit My Answers Give Up
Part B What is the final volume in milliliters when 0.994 L of a 42.3 % (m/v) solution is diluted to 24.1 % (m/v)? Express your answer numerically in milliliters. View Available Hint(s) ? Pa| ΑΣφ ml W = Submit 7 of 28 A Review Constants Periodic Table Part C A 894 ml NaCl solution is diluted to a volume of 1.02 L and a concentration of 6.00 M. What was the initial concentration? Express the molar concentration numerically. View...
An electric ceiling fan is rotating about a fixed axis with an
initial angular velocity magnitude of 0.290 rev/s . The magnitude
of the angular acceleration is 0.886 rev/s2 . Both the the angular
velocity and angular accleration are directed clockwise. The
electric ceiling fan blades form a circle of diameter 0.800 m
.
Part A Compute the fan's angular velocity magnitude after time 0.194 s has passed Express your answer numerically in revolutions per second rev/S Submit Hints My...
« previous | 13 of 19 next» Item 13 Part A How long does it take a person at rest to breathe one mole of air if the person breathes 83.0 mL/s of air that is measured at 25 °C and 755 mmHg? The various gas laws can be used to describe air, which is a mixture of gases. In some cases, these laws have direct application to the air that we breathe. Express your answer numerically in seconds. Submit...
Part C Calculate the pressure, in atmospheres, if 2.75x10-3mol occupies 415 mL at 131°C Express the pressure in atmospheres to three significant digits. atm Submit My Answers Give Up Part D Calculate the quantity of gas, in moles, if 126 L at 53.0 °C has a pressure of 11.15 kPa Express the amount in moles to three significant digits. n= mol Submit My Answers Give Up
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