Answer:
The answer is 21 years.
Explanation:
7×3
Answer:
hi
good morning
myself veeresh
and you
Please help I’ll give brainliest
REACTION TYPE:
Single displacement/Oxidation-reduction
(Hope this helped UwU)
Answer:
Synthesis reaction is the answer
Which equation represents the correct net ionic equation for the reaction between Ca(OH)2 and H2SO4?
Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O.
2 upper H superscript plus, plus 2 upper O upper H superscript minus right arrow upper H subscript 2 upper O.
Upper C a superscript 2 plus, plus 2 upper O upper H superscript minus, plus upper S upper O subscript 4 superscript 2 minus right arrow upper C a superscript 2 plus, plus upper S upper O subscript 4 superscript 2 minus, plus 2 upper H subscript 2 upper O.
Upper C a (upper O upper H) subscript 2 plus upper H subscript 2 upper S upper O subscript 4 right arrow upper C a upper S upper O subscript 4 plus 2 upper H subscript 2 upper O.
Answer: The equation Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O represents the correct net ionic equation for the reaction between [tex]Ca(OH)_{2}[/tex] and [tex]H_{2}SO_{4}[/tex].
Explanation:
An ionic equation is defined as the equation where both reactants and products are present in the form of ions.
For example, ionic equation between [tex]Ca(OH)_{2}[/tex] and [tex]H_{2}SO_{4}[/tex] is as follows.
[tex]Ca^{2+} + 2OH^{-} + 2H^{+} + SO^{2-}_{4} \rightarrow Ca^{2+} + SO^{2-}_{4} + 2HOH[/tex]
Cancelling the spectator ions then net ionic equation will be as follows.
[tex]2H^{+} + 2OH^{-} \rightarrow H_{2}O[/tex]
Thus, we can conclude that the equation Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O represents the correct net ionic equation for the reaction between [tex]Ca(OH)_{2}[/tex] and [tex]H_{2}SO_{4}[/tex].
round 5,239 to 2 significant figures
Answer:
5240
Explanation:
I'm not sure tho sorry
The electrolysis of water has the equation 2H2O (l) → 2H2 (g) + O2 (g). What type of reaction is this?
A)
Single displacement
B)
Double displacement
C)
Decomposition
D)
Synthesis
Answer:b
Explanation:
55 points say 5 "55" times
Answer:
5555555555555555555555555555555555555555555555555555555
Answer:
5555555555555555555555555555555555555555555555555555555
Explanation:
5555555555555555555555555555555555555555555555555555555
Please help !!!!!
Calculate how many joules of energy are needed to warm 4.37 g of silver from 25.0C 27.50 if the specific heat of silver is 0.24 J/g C?
Answer:
Explanation:
Energy needed = mass * temperature difference * specific heat
= 4.37 * (27.5-25) * 0.24
= 4.37 * 2.5 * 0.24
= 2.622J
Answer:
Explanation:
warm up 2.5C
mass 4.37
specific heat 0.24
energy = 2.5*4.37*0.24
= 2.6J
Để trung hoà 20ml dung dịch HCl 0.1M cần 10ml dung dịch NaOH nồng độ x mol/l . Giá trị của x là
The question is: To neutralize 20ml of 0.1M HCl solution, 10ml of NaOH solution of concentration x mol/l is required. What is the value of x?
Answer: The value of x is 0.2 M.
Explanation:
Given: [tex]V_{1}[/tex] = 20 mL, [tex]M_{1}[/tex] = 0.1 M
[tex]V_{2}[/tex] = 10 mL, [tex]M_{2}[/tex] = x
Formula used is as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}\\0.1 M \times 20 mL = x \times 10 mL\\x = 0.2 M[/tex]
Thus, we can conclude that the value of x is 0.2 M.
Please help down below I'll give brainliest
Answer: plastic conduces heat
Explanation:Plastics are excellent insulators, meaning they can efficiently trap heat — a quality that can be an advantage in something like a coffee cup sleeve. ... The new polymers, which are lightweight and flexible, can conduct 10 times as much heat as most commercially used polymers
Produces helium, a safe noble gas
O Fission
O Fusion
Answer:
Nuclear fission power plants have the disadvantage of generating unstable nuclei; some of these are radioactive for millions of years. Fusion on the other hand does not create any long-lived radioactive nuclear waste. A fusion reactor produces helium, which is an inert gas.
How many sulfur (S) atoms in copper (II) sulfate pentahydrates?
Answer: In copper (II) sulfate pentahydrate, only 1 sulfur atom is present.
Explanation:
The chemical formula of the copper (II) sulfate pentahydrate is [tex]CuSO_4.5H_2O[/tex]
In the given chemical formula:
Number of copper atoms = 1
Number of sulfur atoms = 1
Number of oxygen atoms = 9
Number of hydrogen atoms = 10
Hence, in copper (II) sulfate pentahydrate, only 1 sulfur atom is present.
is para-dichlorobenzene an ionic, covalent or metallic bond?
I think there are a bond??
Answer:
it is covalent
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Concentrations-
How many moles of HCI are present in 562.0 ml of a 6.17 M HCI solution?
If possible, show work.
What does a prism do?
A. It changes the wavelengths contained in a beam of light.
B. It combines wavelengths to make white light.
C. It removes specific wavelengths from a beam of light.
O D. It separates the wavelengths contained in a beam of light.
Answer:
D
the angles wich light is coming into the medium are not the same for all wavelengths (colors, at least in the visible spectrum). same for outgoing light.
the same it true for any transparent barrier between two different materials, like air and water.
A prism separates the wavelengths contained in a beam of light. Hence Option (D) is correct.
What is Prism ?A glass or other transparent object in the form of a prism, especially one that is triangular with refracting surfaces at an acute angle with each other and that separates white light into a spectrum of colours.
A prism is an optical component that serves one of two major functions: it disperses light, or it modifies the direction (and sometimes polarization) of light.
In some cases, a prism has more than one function. Prisms are usually transparent to the region of the electromagnetic spectrum being observed.
The prisms are employed to produce polarized light for optical instruments such as microscopes and polarimeters.
Mirrors are commonly utilized to fold the light beam through an optical system.
Therefore, A prism separates the wavelengths contained in a beam of light. Hence Option (D) is correct.
learn more about Prism here;
https://brainly.com/question/12649592
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How did reducing the number of
decomposers affect the amount of carbon
dioxide in the ecosystem?
Answer:
As organisms release energy during cellular respiration, carbon dioxide is produced from the carbon in energy storage molecules. ... Carbon dioxide in the biodome decreased because decomposers decreased which means there was a decrease in cellular respiration overall.
btw :
stay safe! :3
4. Completa el texto con las siguientes palabras del listado. La contaminación por ? Es una alteración ? Que destruye la vegetación, ? Y el suelo y afecta el ? , es el resultado de la quema de ? Y gases industriales nocivos.
Answer:
Actividades humanas y vida marina.
Explicación:
La contaminación ocurre por actividades humanas que se considera una alteración en el medio ambiente. Esta contaminación provocada por el ser humano puede destruir la vegetación, el suelo y afectar negativamente a la vida marina. Esta destrucción que se produce en el medio ambiente es el resultado de la quema de combustibles fósiles que liberan gases industriales nocivos en la atmósfera por lo que si queremos proteger nuestro medio ambiente de mayores daños tenemos que reducir las actividades que provocan la liberación de gases nocivos en la atmósfera. .
An element X has the proton number 18.
The next element in the periodic table is an element Y.
Which statement is correct?
Answer:
This question is incomplete
Explanation:
This question is incomplete. However, the element X with the atomic number of 18 is Argon (Ar) while the next element (element Y) in the periodic table, with atomic number 19, is potassium (K).
Element X is found in the group zero (also called group 18 and elements found therewith are referred to as noble gases) of the periodic table while element Y is found in group 1 (elements found here are referred to as alkali metals).
Element X has a completely filled outermost shell while element Y has one electron in its outermost shell.
Element X is a metal while element Y is a nonmetal.
Ecosystems involve interactions between biotic and abiotic factors. Using one or more complete sentences name two abiotic and two biotic factors that might make up an ecosystem.
Answer:
Examples of biotic factors in an ecosystem are plants and animals
Examples of abiotic factors in an ecosystem include sunlight and type of soil
Explanation:
An ecosystem is a self-supporting unit composed of living and non living parts. Materials and energy flow within the ecosystem.
The ecosystem is composed of living and nonliving parts which affect each other in very significant ways.
The biotic factors of the ecosystem are the living factors such as plants and animals.
The abiotic factors are the nonliving factors of the ecosystem such as sunlight and type of soil.
Which of the following methods can be used to identify the suspected use of heat lamps in a house without entering the house?
A. Identify the lamps inside the house using x−ray machines.
B. Detect the heat emitted by the lamps using infrared rays.
C. Use special cameras to emit ultraviolet light that can detect the heat lamps.
D. Capture the images of lamps inside the house using radars that send radio wave signals.
Answer:
b I see some of ask you to do it
Answer:
B. Detect the heat emitted by the lamps using infrared rays.
Explanation:
During nuclear fission and fusion, what is matter that seems to disappear actually converted into?
mass
energy
volume
nuclei
12. Which nonmetal is the most reactive?
A bromine
B
iodine
C) fluorine
D) chlorine
Answer:
C Fluorine
Explanation:
. Calculate the pH and the pOH of each of the following solutions at 25 °C for which the substances ionize completely:
(a) 0.200 M HCl
(b) 0.0143 M NaOH
(c) 3.0 M HNO3
(d) 0.0031 M Ca(OH)2
Based on the molarity of the solutions;
For 0.200 M HCl; pH = 0.699, pOH = 13.301For 0.0143 M NaOH; pOH = 1.845, pH = 12.16For 3.0 M HNO3; pH = -0.4771, poH = 14.4771For 0.0031 M Ca(OH)2; pOH = 2.21, pH = 11.79What pHand pOH?pH is the negative logarithm to base ten of the hydrogen ions concentration of a solution.
pH = -log[H+]pOH is the negative logarithm to base ten of the hydroxide ions concentration.
pOH = -log[OH-]Also;
pH + pOH = 14For HCl:
pH = -log [H3O+]
pH =-log (0.200)
pH = 0.699
Then;
poH= 14-0.699
pOH = 13.301
For NaOH:
pOH= -log [OH-]
= -log (0.0143)
pOH = 1.845
Then;
pH= 14-poH
= 14- 1.845
pH = 12.16
For HNO3:
pH= -log[H3O+]
=-log(3.0)
= -0.4771
Then;
pOH = 14-9-0.4771
pOH = 14.4771
For [Ca(OH)2]
molarity = 0.0031M
2 moles of OH- are produced
[OH-]= 2 × 0.0031
[OH-] = 0.0062M
pOH = - log[OH-]
=-log(0.0062)
=-log(6.2x10-3)
=-(-2.21)
pOH = 2.21
Then;
pH =14-2.21
pH =11.79
Learn more about pH and pOH at: https://brainly.com/question/13557815
what is indepent and dependent variables
Answer:
The independent variable is the cause. Its value is independent of other variables in your study.
The dependent variable is the effect. Its value depends on changes in the independent variable.
Ex: The ice cube melts on the stove.
Dependent variable: Ice Cube
Independent variable: heat of stove
Answer:
In an experiment, the IV(independent variable) is a variable that is changed to see how it affects something else, and the DV (dependent variable)is a variable that is being measured/observed.
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Which part of the Earth system contains most of the planet's mass?
Answer:
Geosphere of the Earth system contains most of the planet's mass.
Explanation:
One of the most important is the Carbon Cycle since all of the organisms on Earth are carbon-based life forms. includes all water on the surface of the earth oceans, lakes, rivers, aquifers, and ice. 70% of the earth's surface is covered with water.
I.
Look at the pictures below. What can you say about them?
Describe their similarities and differences. Write your answer in
your notebook
Www
cowo
Politics
SXO
is
Answer:
Hey , I can't see the picture
can someone check if i did this right. thank you !!
Answer:
noo
Explanation:
its basic
....................
Answer: acidic
Explanation:
Which do you think has more mass, 1 mole of fructose, 1 mole of sucrose or 1 mole of aspartame? Explain your reasoning.
Answer:
i think they would be all the same
Explanation:
they sound like sugars
(PLEASE HELP 20 POINTS)
4.2 moles of an unknown gas at a pressure of 5.5 atm has a volume of 12.0 L.
What is the temperature?
Answer: The temperature of the unknown gas is 191.4 K.
Explanation:
To calculate the temperature of the gas, we use ideal gas equation which is given as:
[tex]PV=nRT[/tex] .......(1)
Where
P = pressure of the gas = 5.5 atm
V = volume of gas = 12.0 L
n = number of moles = 4.2 moles
R = Gas constant = 0.0821 L.atm/mol.K
T = temperature of the gas = ?
Putting values in equation 1:
[tex]5.5atm\times 12.0L=4.2mol\times 0.0821L.atm/mol.K\times T\\\\T=\frac{5.5atm\times 12.0L}{4.2mol\times 0.0821L.atm/mol.K}\\\\T=191.4K[/tex]
Hence, the temperature of the unknown gas is 191.4 K.
Chemical A and Chemical B react in an exothermic reaction. What can be known about what will happen when Chemical A and Chemical B are mixed together?
The new substance will need more energy to form its chemical bonds than the old substance will release.
More energy will be released from the old substance than the new substance will need to form its chemical bonds.
The color will change as a result of the reaction.
The substance will bubble as a result of the reaction.
Answer:
B
Explanation:
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
describe how water molecules can hydrate various substances
Answer:
A water molecule can react with the carbonyl group of an aldehyde or a ketone to form a substance known as a carbonyl hydrate, as shown in the first reaction below. The carbonyl hydrates usually form a very small percentage of the molecules in a sample of a specific aldehyde or ketone.
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The complete balanced equation for the reaction between barium hydroxide and acetic
acid is
Answer:
2 CH3COOH + Ba(OH)2 --> Ba(C2H3O2)2 + 2H2O
To make it less clustered, you can use Ac for C2H3O2.
2 HAc + Ba(OH)2 --> Ba(Ac)2 + 2H2O
The acetic acid reacts with the base barium hydroxide to form the salt barium acetate and water.
Explanation:
final answer. C
