Answer:
Hybridization of CO2 (Carbon Dioxide)
A stretched spring has an elastic potential energy of 35 J when it is stretched 0.54 m. What is the spring constant of the spring? Round your answer to two significant figures.
StartFraction N over m EndFraction
Answer:
240 N/m
Explanation:
Using the formula as follows:
U = ½kx²
Where;
U = elastic potential energy (J)
K = spring constant (N/m)
x = stretched displacement (m)
According to the information provided in this question,
U = 35J
x = 0.54m
k = ?
U = ½kx²
35 = ½ × k × 0.54²
35 = ½ × k × 0.2916
35 = 0.2916k/2
70 = 0.2916k
k = 70 ÷ 0.2916
k = 240.05
To 2s.f, the spring constant (k) = 240 N/m.
Answer: 240
Explanation:
Radical's of
1. Carbonate=
2.hydroxide=
3.bicarbonat=
4.chloride=
5. phosophate=
6. sulphate=
8. Nitrate=
9. Nitrite=
10. Iodide=
please answer 50 marks
Answer:
1..CO3
2..OH
3..CO
4..Cl
5..PO3
6..SO4
8..NO3
9..NO2
1O..I2
What is the number of carbon atoms in a cycloalkyne with 8 hydrogen atoms
Answer:
4
Explanation:
C4H8
Please help me, It's my last question :)
Imagine you have a 5L balloon that you would like to fit into a 3L container. The current temperature is 298 K. At what temperature would you need to change the system to allow the balloon to fit into the container? Show your work.
[tex]V_{1} = \text{5 L}[/tex]
[tex]T_{1} = \text{298 K}[/tex]
[tex]V_{2} = \text{3 L}[/tex]
Unknown:[tex]T_{2}[/tex]
Solution:[tex]\dfrac{V_{1}}{T_{1}} = \dfrac{V_{2}}{T_{2}}[/tex]
[tex]T_{2} = T_{1} \times \dfrac{V_{2}}{V_{1}}[/tex]
[tex]T_{2} = \text{298 K} \times \dfrac{\text{3 L}}{\text{5 L}}[/tex]
[tex]\boxed{T_{2} = \text{179 K}}[/tex]
[tex]\\[/tex]
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What percentage of the total atomic mass of magnesium bromide (MgBr2) is composed of bromine? Hint - consider the mass of both atoms of bromine in your calculation. A.43% B.87% C.13% D.63%
Answer:
B. 87%
Explanation:
First, we calculate the molecular mass of magnesium bromide (MgBr2) as follows;
MgBr2 = 24.3 + 79.9(2)
= 184.1g/mol
Since 1 atom of bromine contains 79.9g, then the mass of two atoms of bromine (Br2) is 79.9 × 2 = 159.8g
Hence, the percentage of bromine (Br2) in MgBr2 is calculated as follows:
% mass of Br2 = mass of Br2/ molecular mass of MgBr2 × 100
% mass of bromine = 159.8/184.1 × 100
% mass of bromine = 0.8680 × 100
% mass of bromine = 86.8%
Approximately, % mass of bromine is 87%
You have a beaker of water that potentially has Ag+ ions and Ba+ ions (it could have both, one of them, or none of them). How would you design an experiment (flow chart or procedure steps) that will determine which (if any) of these ions are in your water?
Answer:
See explanation
Explanation:
Qualitative analysis in chemistry is a method used to determine the ions present in a solution chiefly by means of chemical reactions.
In this case, I suspect the presence of silver ions and/or barium ions. The first step is to add dilute HCl. This will lead to the precipitation of the silver ion as AgCl. If a white precipitate is formed upon addition of HCl then Ag^+ is present in the solution.
Secondly, I add a carbonate such as NH4CO3(aq). This will cause the barium ions to become precipitated as barium carbonate. Hence, the formation of a white precipitate when NH4CO3(aq) is added to the solution indicates the presence of barium ion in the solution.
PLEASE ANSWER I RLLY NEED IT
Galaxy #9
To which category does galaxy #9 belong? Why does it belong in this category?
Charles's law describes the relationship of the volume and temperature of
gas at a constant mass and pressure. According to this law, what would
happen to the temperature of the gas if its volume decreased from 1.0 L to
0.50 L?
O A. The temperature would decrease by 500 K.
O B. The temperature would double.
O C. The temperature would be reduced by half.
O D. The temperature would increase from 500 K to 1000 K.
Answer:
The temperature would be reduced by half
Explanation:
Charles' Law => V ∝ T => V = kT => k = V/T
For two sets of T vs V conditions, the system constant (k) remains unchanged and k₁ = k₂ => V₁/T₁ = V₂/T₂.
Therefore, if V₁ is reduced to 1/2V₁ = V₂ => V₁/T₁ = 1/2V₁/T₂ => V₁/T₁ = V₁/2T₂
and solving for T₂ => 1/T₁ = 1/2T₂ => 2T₂ = T₁ => T₂ = 1/2T₁
∴ The initial temperature (T₁) would be reduced by half or, T₂ = 1/2T₁
True or False: Electrons are significantly smaller than protons and neutrons, we can ignore electrons when we consider the physical property of an atom.
Answer:
true
Explanation:
How does the number of reactants in a decomposition reaction compare with
the number of products?
A. The number of reactants may be greater than or less than the
number of products.
B. The number of reactants is the same as the number of products.
C. The number of reactants is less than the number of products.
D. The number of reactants is greater than the number of products.
The number of reactants is less than the number of products in a decomposition reaction.
What is a Decomposition reaction?This is the type of chemical reaction which involves a reactant being broken down into two or more products.
This means the number of product is always greater than the reactant which is why option C was chosen.
Read more about Decomposition reaction here https://brainly.com/question/1465225
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Which choice can be classified as a pure substance?
salt water
Iced Tea
pumpkin pie
salt
Answer:
Salt
Explanation:
It is because it has a defined composition.
Answer:
Salt
Explanation:
Pure substances are those that contain atoms or molecules of the same type. For eg: elements are pure (gold, hydrogen etcl.) and compounds (such as water, sodium chloride, etc.), etc.
Rest of choice are impure because they contain a mixture of different things, like pie has eggs, or all sorts of other molecules, salt water has water and salt molecules, and iced tea has water and other molecules associated with tea.
Identify one natural process that may cause sudden climate changes.
Answer:
Global Warming , Volcanic Eruption
I need help with both of the questions fast plz!!!
Answer: SMALLEST is lithium
LARGEST is Fluorine
Explanation:
start with 3 breads and 2cheese. how many products are made? and what are the leftovers?
The table below gives some characteristics of element Y
what is the identity of Y
Answer:
I doint understand that question resend it again
cho 6,5g muối sắt clorua tác dụng với dung dịch AgNO3 dư thu được 17,22g kết tủa. Công thức hóa học của muối sắt clorua là công thức nào? biết hệu suất phản ứng là 100%
Answer:
Công thức muối sắt là FeCl_3 nha bạn.
What happens in nuclear fusion?
A. Isotopes are made from gamma rays.
B. Two separate nuclei form one nucleus.
C. Missing mass is added back to a nucleus.
D. Nuclei spontaneously break down.
Is hand washing a chemicals change or physicals change and why?
Answer:
If you wash your hands with soap, the soap molecules act as a link between the water you're washing with and the oil on your skin.
Explanation:
Name the following ether: CHCH2OCH3
A. Diethyl ether B. Propanol
C. Dimethyl ether C. Ethyl Methyl Ether
Answer:
ethyl methyl ether
Explanation:
when naming ethers name the alkyl rings, in this case we have methyl and ethyl( make sure they are in alphabetical order) followed by the word ether, so it becomes ethyl methyl ether
current electricity occurs naturally(true or false)
Answer:
True
Explanation:
Calcular el porcentaje de cada elemento en los compuestos químicos dados.
1. KNO3 (Nitrato de potasio: fertilizante): %K=? , %N=? , %O=?
Answer:
%K=38,6% %N=13,86% %O=47,54%
Explanation:
%K=M K/M KNO3
=39/101
=38,6%
%N=14/101
=13.86%
%O=100%-%K-%N
=100-38,6-13,86
=47,54%
what is the product of the reaction between arsenic and oxygen
a. AsO
b. AsO2
c. As3O2
d.As2O3
Answer:
d
Explanation:
As + O2 -------->as2o3
What is the product of the unbalanced combustion reaction below?
C4H10(g) + O2(g) →
A. C(s) + H2O(9)
B. C6H1206(s)
C. CO2(g) + H20(9)
D. CO2(g) + H2(9)
Answer:
C
Explanation:
because it is complete combustion so it will produced CO2 +H2O :)
sodium chloride (NaCl) is an ionic compound that we consume everyday as a table salt,
what is the reason that the structure of the ionic compound causes the compound to be hard
and shiny? *
Answer:
See Explanation
Explanation:
Ionic compounds are composed of crystals. The crystal structure of an ionic compound is responsible for its hardness.
A crystalline solid contains a well organized structure which enables it to be hard and have a particular geometric shape as well defined melting point.
Hence, all the observed characteristics of NaCl are the result of its crystalline structure.
If 81g of water is measured out, how many moles are in the sample? *
A. 4
B. 5
C. 2.5
D. 4.5
Answer:
D
Explanation:
because moles = mass /mr
so 81/18(mr of H2O=2+16)
moles =4.5
hope this helps:)
Bacteria and mold break down fallen leaves on the forest floor. When they do
this, they release carbon dioxide into the atmosphere and ntrogen to the
soil. Which of the following roles do bacteria and mold have in the
environment?
Answer:
H
Explanation:
not sure tho sorry if I'm wrong
What is the total mass of a 10 gram sample of 42K that will
remain unchanged after 12.4 hours?
A 2.5 g
B 5.0g
C 7.5 g
D 10 g
What is the concentration of a solution containing 0.32 moles of NaCl in 3.4 liters?
Answer:
To get the molarity we need to divide the number of moles of NaCl by the volume of the solution. So, 0.32 moles NaCl divided by 3.4 L, and that gives 0.094 M NaCl.
What is pOH? ?
A. pOH = Iog[ΟΗ]
Ο Ο Ο
Β. pH = Iog[Η]
Ο C. pH = Iog[ΟΗ]
D. pOH = [Η
(OH)
Wha is the molecular formula ?
[tex]NONSENSE=REPORTED[/tex]
A molecular formula consists of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of atoms of each element present in the molecule. The molecular formula for a compound can be the same as or a multiple of the compound's empirical formula.
I hope it seemed helpful to you!
Answer:
Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element’s symbol. The molecular formula expresses information about the proportions of atoms that constitute a particular chemical compound, using a single line of chemical element symbols and numbers. Sometimes it also includes other symbols, such as parentheses, dashes, brackets, and plus (+) and minus (–) signs.
Hope it's helpful