Answer:
C
Explanation:
Adding and acid and base together until it is completely neutralized will give us water and a salt.
For example:
HCl + NaOH --> NaCl + H2O
HCl being the acid
NaOH being the base
The H2O is water
The NaCl is the salt
Which elements will form a cation?
Oxygen
Helium
Magnesium
Sulfur
Answer:
Magnesium
Explanation:
Magnesium is a metalMetals have tendency to give up the electrons of the outermost shell and forms cation.[tex]Mg \longrightarrow Mg^{2+} + 2e^-[/tex]If brainly deletes one more of my answers when im just answering the question correctly im suing bro
Answer:
The moderators are just there to delete relevant questions or answers but they aren't deleting the spammers .
Explanation:
Stay safe, stay healthy and blessed.
Have a good day !
Thank you
What is the number of electrons shared in the multiple carbon carbon.
Answer:
a single bond will share 2 electrons
double will share 4
so triple will share 6
Which of the following ions is formed when the positive hydrogen ions from an acid bond to water molecules?
H−
OH−
H2O+
H3O+
Answer:
H20 +
Explanation:
The ion that is formed when the positive hydrogen ions from an acid bond to water molecules is H₂O⁺. The correct option is C.
What are hydrogen ions?
Hydrogen is an element that is present in the first place on the periodic table, and its atom's number is 1. The nucleus of hydrogen contains only one electron, and it contains a positive 1 charge.
Hydrogen is called hydrogen ion when it participates in any chemical reactions. They become charged and participate in electron bonding to form compounds.
The positive Hydrogen ions, when forming a bond to water molecules, will be represented as H₂O⁺ because hydrogen only contains a positive charge on it. The unit positive charge on the hydrogen is the proton present in its nucleus.
Thus, the correct option is C. H₂O⁺
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How many kilojoules of heat are produced when 34.0 g of Fe2O3 reacts with an excess of CO according to the following reaction? Fe2O3 + 3 CO 2 Fe + 3 CO2 ΔH = -26.3 kJ
The heat produced when iron oxide reacts with carbon monoxide is -23.47 kJ/mol.
What is the enthalpy of reaction?
The standard enthalpy of the reaction is given by the enthalpy of formation of the products and the reactants. The reactants and the products of the reaction are:
Fe₂O₃ (s) + 3CO (g) → 2Fe(s) + 3CO₂ (g)
We know,
The standard enthalpy of formation of iron oxide = −825.50 kJ/mol
The standard enthalpy of formation of carbon monoxide = −110.53 kJ/mol
The standard enthalpy of formation of carbon dioxide = −393.52 kJ/mol
The standard enthalpy of reaction is calculated as:
[tex]\rm \Delta H_{rxn}[/tex] = [2(0) + 3(−393.52)] - [1(-825.50) + 3(-110.53)]
= (0−1180.56+825.50+331.59)
= −23.47 kJ/mol
Therefore, −23.47 kJ/mol is produced.
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What will occur when the trough of Wave A overlaps the crest of Wave B?
Destructive interference will occur, causing the new wave to have more energy than Wave A or Wave B.
Constructive interference will occur, causing the new wave to have more energy than Wave A or Wave B.
Destructive interference will occur, causing the new wave to have less energy than Wave A or Wave B.
Constructive interference will occur, causing the new wave to have less energy than Wave A or Wave B.
Answer:
Destructive interference will occur, causing the new wave to have less energy than Wave A or Wave B.
Explanation:
Destructive interference has lesser intensity.
When the trough of Wave A overlaps the crest of Wave B, destructive interference will occur, causing the new wave to have less energy than Wave A or Wave B. Therefore, option C is correct.
What is interference and its types?Interference is the phenomenon that occurs when two or more waves meet and overlap with each other.
There are two types of interference: constructive interference and destructive interference.
Constructive Interference: This occurs when the crest of one wave overlaps with the crest of another wave or the trough of one wave overlaps with the trough of another wave. Destructive Interference: This occurs when the crest of one wave overlaps with the trough of another wave. The resulting wave has a lower intensity, which corresponds to a decrease in energy.Therefore, option C is correct.
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compare fission and fusions.
The joining of two smaller nuclei to form one larger nucleus is called...
Select one:
a. alpha decay.
b. beta decay.
c. nuclear fusion.
d. nuclear fission
why would solution iv be considered the most concentrated base out of the four substances?
Acids and bases are the property of the solution based on the concentration of the ions. Solution IV is the most concentrated base as it has the highest concentration of hydroxide ions.
What are bases?Bases are substances or solution that has the potential of hydrogen above 7 on the pH meter scale. It has more hydroxide ions than hydronium or hydrogen ions.
The higher the hydroxide concentration lower will be the pOH and the more alkaline will be the solution. The hydroxide ions have more electrons and can donate some to other species.
Therefore, solution IV is a concentrated base because of high hydroxide ion concentrations.
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True or False? Mask mandates have been lifted on all college campuses. True False
Answer:
False
Explanation:
Which describes interactions between substances and stomata during photosynthesis? Check all that apply.
Oxygen enters stomata.
Oxygen is released through stomata.
Carbon dioxide enters stomata.
Carbon dioxide is released through stomata.
Hydrogen enters stomata.
Hydrogen is released through stomata.
During photosynthesis, Oxygen is released through stomata and Carbon dioxide enters stomata.
What is photosynthesis?Photosynthesis is defined as the process by which green plants use sunlight, water, and carbon dioxide to manufacture their own food in the form of sugar.
The stomata is a pore found on the leaves stem and roots which controls the movement of molecules in and out of the plant.
During photosynthesis, Oxygen is released through stomata and Carbon dioxide enters stomata.
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Answer:
The answer is B, and C
Explanation:
question 2
metallic magnesium reacts with steam to produce magnesium hydroxide and hydrogen gas.
a. if 24.3 g mg are heated with 12.0 g h20, identify the limiting reactant - magnesium or water (steam)?
Explanation:
[tex]molar \: mass(mg) = 24g. {mol}^{ - 1} mass = 24.3g \\ molar \: mass(h20) = 18g. {mol}^{ - 1} mass = 12g \\ n = \frac{mass}{molar \: mass} \\ n(mg) = 1.01mol wich \: is \: substance \: a\\ n(h2o) = 0.67mol \: which \: is \: substance \: b \\ \frac{ |n|a }{ |n|b } : \frac{a}{b} \\ \frac{1.01}{0.67}: \frac{1}{2} \\ 1.51 > 0.50 \\ therefore \: substnce \: b \: which \: is \: water \: steam \: is \: limiting \: reagent [/tex]
Everything in the world is made of matter except you??
TrueFalse
Answer:
False.
Explanation:
Humans are made of matter too :)
A. Match the term with its definition. (1 point)
A. Frequency
B. Wavelength
C. Velocity
_____ The direction and speed at which a wave is traveling
_____ The distance between two adjacent wave peaks
_____ The number of waves passing a point in 1 second
B. What is the equation that illustrates the relationship between wave velocity, frequency, and wavelength? (1 point)
Taking into account the definition of wavelength, frecuency and propagation speed:
Frequency: The number of waves passing a point in 1 second.Wavelength: The distance between two adjacent wave peaks.Velocity: The direction and speed at which a wave is traveling.The equation that illustrates the relationship between wave velocity, frequency, and wavelength is v = f×λ.
WavelengthWavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).
FrequencyOn the other side, frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).
Propagation speed or velocityFinally, the propagation speed is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement.
The propagation speed relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation:
v = f×λ
All electromagnetic waves propagate in a vacuum at a constant speed of 2,998 x 10⁸ m / s, the speed of light.
Therefore, the previous expression establishes an inversely proportional relationship between the frequency and the wavelength: The higher the frequency, the lower the wavelength and when the frequency is lower, the greater the wavelength.
SummaryIn summary, the definition of frequency, wavelength and velocity are:
Frequency: The number of waves passing a point in 1 second.Wavelength: The distance between two adjacent wave peaks.Velocity: The direction and speed at which a wave is traveling.Finally, the equation that illustrates the relationship between wave velocity, frequency, and wavelength is v = f×λ.
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Select the correct answer. what is the empirical formula of a compound with 35.94% aluminum and 64.06% sulfur? a. als b. al4s6 c. als2 d. al2s3 e. als3
The empirical formula of the compound would be [tex]Al_2S_3[/tex]
Empirical formulaThe compound is composed of aluminum and sulfur:
Al = 35.94 S = 64.06
Find the mole of each component
Al = 35.94/26.98 S = 64.06/32
= 1.33 = 2.00
Divide by the smallest:
Al = 1.33/1.33 S = 2/1.33
= 1 = 1.5
Thus, the empirical formula of the compound is [tex]Al_2S_3[/tex]
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The empirical formula of the compound from the calculations done is AlS2.
What is empirical formula?The term empirical formula refers to the simplest formula of a compound. It shows the ratio of atoms of elements in the molecule.
Now, we divide each percentage with the relative atomic mass of the element;
Al - 35.94/27 S - 64.06/32
1.33 2.00
Divide through by the lowest ratio;
1.33/1.33 2.00/1.33
A - 1 S - 2
The empirical formula of the compound is AlS2.
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Plan an investigation to examine the relationship between the amount of gas
and its volume. Identify the materials and write a procedure, identifying the
constants and variables. Conduct the investigation and record your
observations.
I can’t think of anything to use for this experiment and we aren’t told what to use so if anyone had any ideas for that I would really appreciate it
Answer:
You will need a Kukushili pressure cooker for this experiment. This pressure cooker will allow you to compress the gases and observe its volume.
Which of the following is a metric unit?
Gram
Pound
Gallon
Foot
Answer:
gram
Explanation:
Gram is a SI unit (International Ststem of units)
other SI units : kg , meter, ampere, Kelvin
pound gallon and foot are SAE (or imperial) units
14
Select the correct answer.
The perihelion is the point at which Earth is closest to the Sun, and the aphelion is the point at which Earth is farthest away. Based on this
information, which statement is true?
O A. Earth moves faster along its orbit during perihelion because of the Sun's gravitational force.
O B. Perihelion marks the beginning of summer, when Earth is closest to the Sun.
• C
The longest day of the year occurs during perihelion due to a lunar eclipse.
© D. The Moon rotates faster during perihelion because of Earth's gravitational force.
Answer: B
Explanation: I know
Calculate the number of joules released when 75.0 grams of water are cooled from
100.0°C to 27.5°C
Answer:
-22750.5J or -2.28× 10⁴J
Explanation:
q=(75.0g)(4.184J)(27.5°C-100.0°C)
q= -22750.5J
q= -2.28× 10⁴J
Key Concepts
Identify the choice that best completes the statement or answers the question.
13. Basalt is a gray or black igneous rock. Pilar uses an absolute dating method to study a sample of basalt. What will the method help her learn about the basalt sample?
F the age of the sample
G the composition of the sample
H the physical structure of the sample
I the geographic distribution of the sample
Answer:
Explanation:
Answer
It tells you what method she used and what she wanted to accomplish. She is using
an absolute dating method to study a sample of basalt
So the answer you should post is F. F and the quotation above say the same thing.
a common chemicals used as a rising agent
is baking soda. it's chemical name is sodium
bicarbonate. it has a formula of NaHCO3.
what is the molar mass of sodium
bicarbonate?
Which is the balanced equation for v2o5 cas → cao v2s5? v2o5 cas → cao v2s5 5v2o5 5cas → 10cao 5v2s5 3v2o5 3cas → 3cao 3v2s5 v2o5 5cas → 5cao v2s5
We have the balanced reaction equation as; V2O5 + 5CaS → 5CaO + V2S5.
What is a balanced reaction equation?A balanced reaction equation is one in which the number atoms atoms on the reactant side is the same as the number of atoms on the products side.
In that case, we have the balanced reaction equation as; V2O5 + 5CaS → 5CaO + V2S5.
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Answer:
d
Explanation:
got 100
what is the molarity of liters of an aqueous solution that contains 0.50 mole of potassium iodide, KI
Answer:
The molarity of 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide is 0.25M.HOW TO CALCULATE MOLARITY:The molarity of a solution can be calculated by dividing the number of moles by its volume. That is;Molarity = no. of moles ÷ volumeAccording to this question, 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide. The molarity is calculated as follows:Molarity = 0.50mol ÷ 2LMolarity = 0.25MTherefore, the molarity of 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide is 0.25M.Learn more about molarity at: brainly.com/question/2817451
Explanation:
Mark me brainliest please!!! I spent a lot of time on this!!
Acids are released and food is mixed and mashed into a soupy sludge in the ___________.
Answer: Is it multiple choice? The answer should be stomach.
Explanation:
Answer:
Blank = Stomach
The stomach mixes food with acids to create chyme, a, "soup" that helps digestive enzymes complete their work.
Which electromagnetic wave has the least energy ? visible light microwave infrared light gramma ray
Which statements are true of the reactions in the Sun?
Check all that apply.
A.
They occur only between helium atoms.
B.
Hydrogen atoms are produced.
C.
They are fusion reactions.
D.
The reactions occur because of very high temperatures.
The correct statements which are true for the reactions in the Sun are that are fusion reactions and reactions occur because of very high temperatures.
What is nuclear fusion?Nuclear fusion reactions are those reactions in which two species reacts with each other for the formation of new specie.
In the core of the sun, nuclear fusion of hydrogen atoms occur for the formation of helium molecules in the presence of high temperature.
Hence, the correct statements are they are fusion reactions and reactions occur because of very high temperatures.
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Which conclusion could be made from Ernest Rutherford’s gold foil experiment?
Atoms are made up of mostly empty space.
Atoms are mainly solid and block alpha particles.
The volume of the nucleus is large compared to the rest of the atom.
The mass of the nucleus is small compared to the rest of the atom.
Answer:
a. atoms are made up of mostly empty space.(this is because most of the atoms were able to pass through the gold foil undeflected)
Explanation:
Answer:
a. atoms are made up of mostly empty space
What type of pollution is pictured here?
Answer:this air polluction here.
Explanation:
air and soil polluction
differentiate between lignite and anthracite
Answer:
Anthracite is the coal of highest grade whereas Lignite is the lowest grade coal
when 949 J of heat is added to 9 grams of oil at 37˚C , the temperature increases to 62˚C. What is the specific heat of the oil?
Answer:
4.21778 J/(g*C)
Explanation:
specific heat = joules / (mass times temperature change)
949 / (9 times 25)
949 / 225 =
4.21778
