Answer:
[tex]Lithium=Li2s^1\\Sodium=Na3s^1\\Potassium=K4s^1\\Rubidium=Rb5s^1\\Cesium=Cs6s^1\\Francium=Fr7s^1[/tex]
Explanation:
When it comes to electron configuration and orbitals, it's important to first identify what exactly we are trying to identify. Below is a given example:
[tex]He1s^2[/tex]
[tex]He=element[/tex]
[tex]1=level[/tex]
[tex]s=orbital[/tex]
[tex](exponent)^2=electrons[/tex]
Looking at the periodic table, identify the alkali metal family on the periodic table, or group one elements:
[tex]Lithium=Li2s^1\\Sodium=Na3s^1\\Potassium=K4s^1\\Rubidium=Rb5s^1\\Cesium=Cs6s^1\\Francium=Fr7s^1[/tex]
Notice how each configuration has an exponent of [tex]1[/tex], representative of a single electron in their s-orbital.
Usually the number of protons matches the number of?
Answer:
Electrons
Explanation:
Compare and contrast a thermodynamically stable compound and a kinetically stable compound at room temperature with respect to overall energy change, spontaneity with which decomposition occurs, and reaction rate.
Answer:
"im different"
Explanation:
Newton determined that the attractive force between two masses was DIRECTLY proportional to:
Answer:
This is Newtons 2nd Law: Force is directly proportional to the acceleration of the object, acceleration is inversely proportional to the mass of the object.
What is a net ionic equation?
A. An equation that is balan
B. An equation that shows a
Answer:
Explanation:
An equation showing only what is involved in the reaction.
a o e x
How many grams of NaCl would be required
to react with 346 mL of 0.607 M AgNO3
solution?
Answer:
Mass = 12.27 g
Explanation:
Given data:
Mass of NaCl are required = ?
Volume of AgNO₃ = 346 mL (346 mL× 1L/ 1000 mL = 0.346 L)
Molarity of AgNO₃ = 0.607 M
Solution:
Chemical equation:
NaCl + AgNO₃ → NaNO₃ + AgCl
Number of moles of AgNO₃:
Molarity = number of moles / volume in L
0.607 M = number of moles / 0.346 L
number of moles = 0.607 M × 0.346 L
number of moles = 0.21 mol
now we will compare the moles of NaCl and AgNO₃.
AgNO₃ : NaCl
1 : 1
0.21 : 0.21
Mass of NaCl:
Mass = number of moles × molar mass
Mass = 0.21 mol × 58.44 g/mol
Mass = 12.27 g
3 A 60.00 g sample of tetraethyl lead, a gasoline additive, is found to contain 38.43 g lead, 17.83 g carbon, and 3.74 g hydrogen. Find its empirical formula.
Answer:
The empirical formula is PbC₈H₂₀
Explanation:
To determine the empyrical formula, we need to determine the % of each element:
(38.43g / 60 g ). 100 = 64.05 % of Lead
(17.83 g / 60 g) . 100 = 29.72 % of Carbon
(3.74 g / 60 g) . 100 = 6.23 % of H
Now we divide by the atomic mass:
64.05 / 207.2 = 0.309
29.72 / 12 = 2.48
6.23 / 1 = 6.23
We pick the lowest value and we divide again, with this number
0.309 / 0.309 = 1 Pb
2.48 / 0.309 = 8 C
6.23 / 0.309 = 20 H
PbC₈H₂₀
Do acids lose or gain hydrogen ions?
Help
please
Answer: They lose them :)
Explanation:
Hey please answer this for me thanks.
Explanation:
Moles of N2 = 84/28 = 3.0mol
Moles of H2 = 29/2 = 14.5mol
Hence amount of ammonia produced = 6.0 * 17 = 102g.
Consider the reaction: 2AB2 → A2 + 2B2 You start with one mole of AB2 and the reaction is done at constant pressure of 3.7 atm and 28.2 °C. Assume all gases behave like ideal gases. What is the value of the work (in J)?
Answer:
-2503.2J
Explanation:
At constant pressure, change in work follows the equation:
W = -P*ΔV
Where W is work, P is pressure (3.7atm) and ΔV is change in volume
We can obtain change in volume using ideal gas low:
ΔV = ΔnRT/P
Where Δn is change in moles (3moles of products - 2 moles of reactants = 1)
R is gas constant (0.082atmL/molK)
T is absolute temperature (28.2°C + 273.15 = 301.35K)
P is pressure (3.7atm)
ΔV = ΔnRT/P
ΔV = 1mol*0.082atmL/molK*301.35K/3.7atm
ΔV = 6.69L
And work is:
W = -3.7atm*6.69L
W = -24.71atmL
1atmL = 101.3J
-24.71atmL * (101.3J / 1atmL) =
-2503.2J
Can I have an answer for this?
Mass of Aluminium: 27 [tex]\frac{gm}{mol}[/tex]
Mass of Ferous Oxide: 71.84 [tex]\frac{gm}{mol}[/tex]
Aluminium: 7.5 Moles Given
How many moles of Iron (II) oxide(FeO)?
_____________________________________SOLUTION:As there are 2 moles of aluminium involved and 3 moles of ferrous oxide So,
2 moles Al and 3 moles FeO
7.5 moles Al and x moles FeO
For X moles:
X = [tex]\frac{3\ x\ 7.5 }{2}[/tex]
X= [tex]\frac{22.5}{2}[/tex]
X= 11.25 [tex]\frac{gm}{mol}[/tex]
_____________________________________Best Regards,'Borz'Part A:
Identify a property of water that contributes its movement through the capillary tubes. Explain how the
molecular structure of water contributes to this property.
Plants use a similar mechanism to move water through their stems. In a specific species of plant, the
vessels are approximately 0.3 mm in diameter.
Part B:
Estimate how tall this species of plant can grow. Explain how the molecular structure of the vessels can
be modified to increase the maximum height of the plant without changing the diameter of the vessels.
Answer:
Part A
i) A property of water that contributes to its movement through capillary tubes is adhesion, which is the capacity of water to stick to other surfaces
ii) Water has a polar molecular structure as such the hydrogen present in the water molecules form bonds with the oxygen present in the silicon oxide molecules from which the capillary tube is normally made
Part B.
i) From the given graph, the function appears to have a vertical asymptote at x = 0, therefore, the plant can grow infinitely tall
ii) The molecular structure of the vessel can be modified such that the walls incorporate more oxygen molecules per mole which will increase the number and the strength of the hydrogen bond between the water molecules and the walls of the plant vessel and therefore, increase the capillary action, the water height and the maximum height of the tree
Explanation:
ATP, the energy used inside a cell, is created in the Ribosomes
?true or false?
Answer:
false
Explanation:
because its made in the mitochondria
Lithium is a metal,chlorine is a non metal,so LiCl would be a ______bond
a.Metallic
b.Covalent
c.Ionic
Iron (ii) chloride solution is changed into Iron(iii) chloride solution after sometime,
give a reason. ( 26Fe)
Answer:
See explanation
Explanation:
When left to stand, a solution of Iron II chloride is converted to Iron III chloride by oxidation in air.
The Iron III chloride is composed of weak field ligands in its coordination sphere. These weak field ligands mostly occur in a high spin configuration hence, the central iron atom can be converted from Fe[(H20)6]^2+ .2Cl^-(high spin d6) to Fe^3+[(H20)6]^3+ .3Cl^-(high spin d5).
Why do helium balloons pop in a hot car?
Answer: because helium molecules get bigger when they heat up, so if your balloons keep getting hotter, they will eventually pop.
Explanation:hope these gave u a clue and have a wonderful Christmas break ❄️
Explanation:
Because helium molecules grow bigger as they are heated up and eventually they popped out
Select the correct answer.
What is the heat content, q, of the reaction when glucose burns?
OA. q=0
OB. q> 0
O C. q<0
OD. 920
Answer: C. q < 0
Explanation: sorry if I'm wrong
ine element and compound with example.
What is symbol? Write its significance.
Define mixture. Write its types.
Write the difference between mixture and compound.
What is a chemical equation? What are the essentials of
chemical equation? What information is conveyed by
chemical equation? What are its limitations and how are they
removed?
What do you understand by balancing of a chemical equation
Why 'partial equation method' is considered to be better than
"hit and trial method'?
What information is
Explanation:
an element is a substance which cannot be spilt upto two or more simple substances.For eg gold,silvera compound is the substance produced by the union of two or more elements in a definite proportion by weight .For eg water,carbon dioxideI dont knowA mixture is a substance formed by mixing two or more elements are compounds in any proportion by mass .Its types are:Hetregeneous mixture and homogeneous mixture.the difference between mixture and compound is that a mixture is a substance formed by mixing two or more elements are compounds in any proportion by maths and compound is a substance produced by the union of two or more elements in a definite proportion by weight.chemical equation is defined as the symbolic representation of a chemical reactionWhat are the different states of matter and how do they transition from one to
the other? Help plz
Solid is the state in which matter maintains a fixed volume and shape; liquid is the state in which matter adapts to the shape of its container but varies only slightly in volume; and gas is the state in which matter expands to occupy the volume and shape of its container.??.....
You have 0.21 moles of Al how many atoms do you have
Number of atoms : 1.26 x 10²³
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
0.21 moles of Al, so n = 0.21
Number of atoms :
[tex]\tt N=0.21\times 6.02\times 10^{23}\\\\N=1.26\times 10^{23}[/tex]
What is the name of the compound (NH4)2SO4
how does a tiny seed turn into a tree overtime?
Answer:
A group of cells ready to form roots a stem and the first leaves
Hi can anyone answer these two distance and time questions
The constant collisions of the moving particles of a gas with the walls of the container produce the characteristic called
Answer:
Pressure
Explanation:
Apply the definition of pressure to this problem.
Answer:
energy or pressure
Explanation:
How do particles change as the temperature increases in a system? Is this a chemical or physical change?
Answer:
chemical change
Explanation:
particals react to temperature wheteher its cold or warm
The particles begin to move at a higher speed. It is a physical change.
Temperature is defined as the average kinetic energy of the particles of a body. Hence, when a body is heated, the kinetic energy and consequently the speed of its particles increases.
This increase in particle speed is reversed when the system cools down. Recall that a physical change is easily reversible while a chemical change is not easily reversible.
As such, this increase of particle speed with temperature is a physical and not a chemical change.
https://brainly.com/question/11321843
5gm of hydrogen diffused through a porus membrane
in 30 minutes. Find the time required to diffuse
the some amount of so2 gas at identhal conditions.
169.71 minutes
Further explanationGiven
Rate of diffused of Hydrogen=5 gm/30 min
Required
The time required for SO₂
Solution
Graham's law: the rate of effusion of a gas is inversely proportional to the square root of its molar masses or
the effusion rates of two gases = the square root of the inverse of their molar masses:
[tex]\tt \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]
r₁=5gm/30 min
M₁=molar weight of H₂-hydrogen= 2 g/mol
M₂=molar weight of SO₂-sulfur dioxide= 64 g/mol
[tex]\tt \dfrac{5/30}{r_2}=\sqrt{\dfrac{64}{2} }\\\\\dfrac{5/30}{r_2}=4\sqrt{2}\\\\\dfrac{5}{30}=r_2.4\sqrt{2}\\\\r_2=\dfrac{5}{30\times 4\sqrt{2} }=\dfrac{\sqrt{2} }{48}[/tex]
the time required (for the same amount=5 gm) :
[tex]\tt \dfrac{5}{x}=\dfrac{\sqrt{2} }{48}\rightarrow x=120\sqrt{2}=169.71 minute[/tex]
What is
the commission amount on 500000 at rate of 6%
Answer:
30000
Explanation:
6/100×500000 =30000
word equation for reaction between copper and chlorine
Convert 4.92L of hydrogen at STP to moles
Answer:
0.22moles
Explanation:
Given parameters:
Volume of gas = 4.92L
Unknown:
Number of moles = ?
Condition = STP
Solution
At STP, the number of moles of a given gas is expressed as;
Number of moles = [tex]\frac{volume given}{22.4}[/tex]
Number of moles = [tex]\frac{4.92}{22.4}[/tex] = 0.22moles
what major gases are absorb by the ocean
A) oxygen and nitrogen
B) oxygen and hydrogen
C) carbon dioxide and hydrogen
D) oxygen and carbon dioxide
Answer:
C) carbon dioxide and hydrigen
For the reaction H2(g) + 12(g) = 2HI(g), Kc = 50.2 at 445°C. If
[H2] = [12] = [HI] = 1.75 x 10-3 Mat 445°C, which of the
following is true based on the above?
Qc < Kc, the reaction proceeds from left to right to reach equilibrium
Further explanationGiven
K = 50.2 at 445°C
[H2] = [I2] = [HI] = 1.75 × 10⁻³ M At 445ºC
Reaction
H2(g) + I2(g) ⇔2HI(g)
Required
Qc
Solution
Qc for the reaction
[tex]\tt Qc=\dfrac{[HI]^2}{[I_2][H_2]}\\\\Qc=\dfrac{(1.75.10^{-3})^2}{1.75.10^{-3}\times 1.75\.10^{-3}}=1[/tex]
Qc < Kc ⇒ reaction from left(reactants) to right (products) (the reaction will shift on the right) until it reaches equilibrium (Qc = Kc)
