What is the mass of aluminum metal that releases 22.4 l of hydrogen gas at stp from hydrochloric acid? __al(s) + __hcl(aq) → __alcl3(aq) + __h2(g) 18.0 g 81.0 g 9.00 g 40.5 g 27.0 g?
Which of the following is not a postulate of the kinetic-molecular theory? A. Gas particles have a high force of attraction to one another or to the walls of the container. B. The distance between gas particles is much larger than the size of the particles themselves. C. Gas particles will always travel in a straight line until they hit a container wall or another gas particle. D. Gases are made up of particles that act like little, hard spheres that are always moving in a random fashion.
Know how you would determine the percent yield of a reaction if you have the given amount of the reactants and the amount of the product actually collected in the lab.
When only one pair of shared electrons is involved in a covalent bond, the linkage is called a ________ bond. triple double single resonant?
What is the ionic form of this unbalanced equation? mno2 + hno2 → mn(no3)2 + h2o?
What binary compound would be formed from barium ions and fluoride ions?
How many moles of h2so4 are needed to neutralize 1.56 moles of koh?
A hydrocarbon that includes a triple covalent bond is classified as _____.
Hydrocarbons with triple bonds are classified
as Alkynes.
Alkynes have one or more triple bonds between two Carbon atoms but the general formula is CnH2n-2. One is σ bond and rests
are π bonds. Hence, alkynes are called as unsaturated hydrocarbons.
How to find the density of a liquid given only volume and molecular weight?
Which of the elements has the same lewis structure as sulfur?
what is the mass of a 1.00cm3 piece of iron having a density of 7.90g/cm3
Answer:
Mass of iron = 7.90 g
Explanation:
Given:
Volume of iron, V = 1.00 cm3
Density of iron, D = 7.90 g/cm3
To determine:
Mass of iron, M
Explanation:
Density of a substance is the mass occupied by it in a given volume
I.e. [tex]Density = \frac{Mass}{Volume}[/tex]
[tex]Mass = Density*Volume[/tex]
For the given piece of iron:
[tex]Mass = 7.90 g/cm3 * 1.00 cm3 = 7.90 g[/tex]
A 10.00L sample of gas has a mass of 11.92g at stp. What is the molar mass of the gas?
Where –
P = Pressure in atmV = Volume in Ln = moles R = Ideal gas law constant T = Temperature in Kw = Given MassM = Molar MassNow, according to the question –
w =11.92 g V = 10 L P = 1 atmT = 273 KR = 0.0821 atm L/ mol KCalculation –
[tex]\qquad[/tex] [tex]\pink{\twoheadrightarrow\bf PV = nRT}[/tex]
[tex]\qquad[/tex] [tex]\pink{\twoheadrightarrow\bf PV = \dfrac{w}{M}\times RT}[/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\sf\dfrac{w}{M} = \dfrac{PV}{RT}[/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\sf \dfrac{M}{w} = \dfrac{RT}{PV}[/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\sf M = \dfrac{RT}{PV}\times w[/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\sf M = \dfrac{0.0821 \times 273 }{1 \times 10 } \times 11.92 [/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\sf M = \dfrac{22.4}{10} \times 11.92[/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\sf M = 2.24\times 11.92[/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\sf M = 26.7 [/tex]
[tex]\qquad[/tex] [tex]\pink{\twoheadrightarrow\bf M = 26.7\: g}[/tex]
Henceforth, Molar Mass is 26.7 g_______________________________________