The hydronium ion concentration for an aqueous solution in which the hydroxide ion concentration is 1 x 10-10 is
Answers
Answer:
First option is the right choice.
Explanation:
[tex][H_3O^+]=1\times 10^{-4}\:M[/tex]
Best Regards!
Related Questions
Representa la unión iónica entre los siguientes átomos: 1) Bromo y Potasio 2) Calcio y Oxígeno 3) Cloro y Magnesio 4) Sodio y Flúor 5) Aluminio y Nitrógeno Ayuda por favoor
Answers
Answer:
a. KBr
b. CaO
c. MgCl₂
d. NaF
e. NH₃
Explanation:
a. 2K + Br₂ = 2KBr
b. 2Ca + O₂ = 2CaO
c. Mg + Cl₂ = MgCl₂
d. 2Na + F₂ = 2NaF
d. N₂ + 3H₂ = 2NH₃
Which of the following is the best definition of a physical change?
A. Something that can be observed or measured while changing the identity of the substance.
B. A nail rusting.
C. A change that occurs without changing the identity of the substance.
D. Ice melting into water.
Answers
Answer:
the answer is D.ice melting into water
6.3 kJ of energy is required to increase the temperature of some water from 60 °C to 75 °C. The specific heat capacity of water is 4200 J per kg per °C. What is the mass of the water?
Answers
Answer:
Mass of the water = 0.1kg is 100g
Explanation:
Mathematically;
Quantity of heat = mass of water * specific heat capacity * temperature change
From the question, we identify the following;
Quantity of heat = 6.3 KJ
1 KJ = 1000 J, so 6.3 KJ = 6.3 * 1000 = 6300 J
Mass of water = ?
Specific heat capacity = 4200
Temperature change is the difference between the final and initial temperature. = 75-60 = 15
6300 = m * 15 * 4200
63 = m * 15 * 42
63 = 630 m
m = 63/630
m = 0.1 kg
Which type of reaction does this diagram represent? (picture)
Answers
Answer:
its A.addition
Explanation:
edg. 2020 other guy is wrong
Answer the following questions based on their
electronic configuration.
a) 1s2 2s2 2p 2 b) is 2 2s 2 2p4
i) Write the name of the compound, its molecular
formula and type of chemical bond formed by
the combination of these two elements. Also
write down the balanced chemical reaction when
the above compound reacts with water.
Answers
Answer:
the molecular formula is CO2
The bond formed is covalent bond
CO2+H2O = H2CO3
The reaction between the compound and water will give us carbonic acid (H2CO3)
What atom should be balanced last when balancing hydrocarbon combustion
reactions?
A. The oxygen atoms
B. The carbon atoms
C. Any of the three
D. The hydrogen atoms
Answers
Answer:
A. The oxygen atoms
Explanation:
A hydrocarbon combustion reaction consist of carbon, hydrogen and oxygen. In balancing the hydrocarbon combustion reaction at first carbon and hydrogen atoms are balanced and at last oxygen atoms are balanced.
Oxygen atoms are balanced at the end because oxygen atom stand alone as O2 and easier to balance than hydrogen and carbon.
Hence, the correct option is "A".
A blacksmith heated an iron bar to 1445 °C. The blacksmith then tempered the metal by dropping it into 42,800 mL of
water that had a temperature of 22.00 °C. The final temperature of the system was 45.00°C. What was the mass of
the iron bar? (Hint: Density of water is 1.00 g/mL) The specific heat capacity for iron is 25.01 J/mol°C.
Answers
Answer:
6626 g
Explanation:
Given that:
Density of water = 1.00 g/ml, volume of water = 42800 ml.
Since density = mass/ volume
mass of water = volume of water * density of water = 42800 ml * 1 g/ml = 42800 g
Initial temperature of water = 22°C and final temperature of water = 45°C.
specific heat capacity for water = 4.184 J/g°C
ΔT water = 45 - 22 = 23°C
For iron:
mass = m,
specific heat capacity for iron = 0.444 J/g°C
Initial temperature of iron = 1445°C and final temperature of water = 45°C.
ΔT iron = 45 - 1445 = -1400°C
Quantity of heat (Q) to raised the temperature of a body is given as:
Q = mCΔT
The quantity of heat required to raise the temperature of water is equal to the temperature loss by the iron.
Q water (gain) + Q iron (loss) = 0
Q water = - Q iron
42800 g × 4.184 J/g°C × 23°C = -m × 0.444 J/g°C × -1400°C
m = 4118729.6/621.6
m = 6626 g
Hexane and hexene are hydrocarbon compounds from different homologous series. the combustion of these two compounds produce different amount of soot. explain the difference based on the percentage of carbon by mass.
Answers
Answer:
Percentage of carbon of alkene is higher compared to the alkane that has the same number of carbon per molecule. Because of this, combustion of alkene will produce more sooty flame compared to their corresponding alkane and because Alkenes have a higher percentage of carbon compared to their corresponding alkane.
Explanation:
Relative atomic mass : C= 12 and H=1
Percentage of Carbon Hexane (C6H14)
Percentage of Carbon = 83.7 percent
6(12) x 6(12) +14(1) x 100 percent= 83.7 percent
Percentage of Carbon Hexene = 85.7 percent
Which refers to the density of the medium’s particles at the compression of a sound wave? A.amplitude B.pitch C.volume D.wavelength
Answers
Answer:
A is the answer.
Explanation:
The sound wave is a longitudinal wave which travels in the form of compression and rarefaction . The point where the particles are closer to each other is called compression and the point where the particles are far apart from each other is called rarefaction.
Answer:
Amplitude
Explanation:
Amplitude describes the displacement of the medium's particles. The higher the amplitude, the more dense it is, and the lower the amplitude, the less dense it is.
Pitch is incorrect because it describes the sound
Volume is incorrect because it describes the sound.
Wavelength is incorrect because it describes the distance between a period of a wave.
Space exploration was aided most by the
Answers
Explanation:
Space exploration was aided most by the use of liquid fuel.
Hope this helps..
How much energy is required to vaporize 1.5 KG of aluminum
Answers
Answer:
The amount of energy required to vaporize 1.5 kg of aluminium is 16.345 GJ
Explanation:
Given that the heat of vaporization of aluminium, ΔHvap = 294000 kJ/mol
Mass of the given aluminium = 1.5 kG = 1500 g
Number of moles of aluminium = Mass of aluminium/(Molar Mass of aluminium)
Molar Mass of aluminium = 26.98 g/mol
Therefore, we have;
Number of moles = 1500/26.98 = 55.6 moles
The energy required = The heat of vaporization of aluminium × Number of moles of aluminium
The energy required = 294000 × 55.6 = 16345441.0675 kJ = 16.345 GJ.
Answer:
1650 kJ
Explanation:
Q = ΔH vaporization (for Al) x m
Q = 1100 kJ/kg x 1.5 kg = 1650 kJ
DUE IN 30 MINUTES!!! (please keep it short if you can, if not its ok.) What is the molar mass of Pb(SO4)2? Explain how you calculated this value. (4 points)
Answers
Answer:
399
Explanation:
Pb(SO4)2 contains 1 atom of Pb, 2 atoms of S and 8 atoms of O. So, atomic mass of Pb(SO4)2 is 207 + 64 + 128 = 399 u. Therefore, molar mass of Pb(SO4)2 is 399 g/mol.HOPE THIS helps. Good Luck
Answer:
The molar mass of Pb(SO₄)₂ is 399.32.
Explanation:
To find the molar mass of Pb(SO₄)₂, you have to find the molar mass of each individual element that makes up the compound.
Let's start by figuring out how many of each element is present in the compound.
Pb (lead) - 1
S (sulfur) - 2
O (oxygen) - 8
(SO₄)₂ is a polyatomic ion. It is written in parentheses followed by a subscript of 2. This means that there are two sulfate ions in the compound. So, the number of sulfur atoms and oxygen atoms doubles. (1 × 2 = 2) and (4 × 2 = 8).
Next, look up the molar mass of each element on a periodic table and multiply it by the number of atoms present.
Pb - 207. 2 × 1 = 207. 2
S - 32.06 × 2 = 64.12
O - 16.00 × 8 = 128
Lastly, add up them all together to get the molar mass.
207. 2 + 64.12 + 128 = 399.32
all electromagnetic radiation: A. can travel through empty space B. travels at the same speed in a vacuum C.consists of photons D. all of the above
Answers
Answer:
A. can travel through empty space
Explanation:
it is said dat electro magnetic waves or radiation travels through the vacuum of space
Answer:
all of the above. Because, Y'know, electromagnetic radiation is like that.
20
What is the name of this compound?
OH
CH3-CH3 -CH 2 -CH2-CH-CH2
Isohexyl alcohol
hexyl alcohol
tert-hexyl alcohol
sec-hexyl alcohol
Answers
tret-hexyl alcohol
Explanation:
its formula is CH3-CH3-CH2-CH2-CH-CH2
How many moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide reacts with excess iron (III) chloride? FeCl3 + 3NaOH —> Fe(OH)3 + 3NaCl
Answers
Answer:
1.67 moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide reacts with excess iron (III) chloride.
Explanation:
The balanced reaction is:
FeCl₃ + 3 NaOH ⇒ Fe(OH)₃+ 3 NaCl
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reagents and products participate in the reaction:
FeCl₃: 1 moleNaOH: 3 molesFe(OH)₃: 1 moleNaCl: 3 molesThen you can apply the following rule of three: if 3 moles of NaOH form 1 mole of Fe(OH)₃, 5 moles of NaOH how many moles of Fe(OH)₃ do they form?
[tex]moles of Fe(OH)_{3} =\frac{5 moles of NaOH*1 mole of Fe(OH)_{3} }{3 moles of NaOH}[/tex]
moles of Fe(OH)₃= 1.67
1.67 moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide reacts with excess iron (III) chloride.
Jack tries to place magnets on his refrigerator at home, but they won’t stick. What could be the reason?
Answers
Answer:
The reason might be that the material that the fridge is made out of is not magnetic, meaning that it's not attracted to metal.
As transformações estão presente em nosso cotidiano, elas nunca param de acontecer, na sua maioria invisível a olho nu.Quais critérios é preciso observar para identificar se ocorreu transformação?
Answers
Answer:
Explanation:
as transformações parecem invisíveis por causa do nível de organização da vida. A célula é a unidade básica da vida, a célula é invisível e todas as mudanças são resultado da formação de novas células no ser vivo.
newborn reflexes... A. are consciously controlled behaviors B. are unique to each individual newborn C. have little impact on development D. contribute to infant survival
Answers
Answer:
The correct answer to the following question will be Option B.
Explanation:
To survive, newborns don't require reflexes. Even though their perceptions were already improving performance, they don't rely on visual stimulation because it was too abstract for them so you can't even guess whose stimulus they're going comes to choosing.The reflexes between each child are special. Each one of them has its own.For instance, its action has always been designed to suck quickly.
Some other choices being made aren't linked to the circumstance. The second Scenario would have been the right choice.
Lipase is a protein that helps the body break down fats in foods. Lipase is best classified as which type of protein? an enzyme an antibody a structural protein a binding protein.
Its for edg please answer quickly if you can
Answers
Answer:
an enzyme
Explanation:
just took it on edge
Lipase is an enzyme protein which contains amino acids that helps the body break down fats in foods.
What is an amino acid?Amino acids are defined as the substances which are considered to be the monomers of proteins.Every amino acid has the same structure consisting of a central carbon which is bonded to an amino group , carboxyl group and a hydrogen.
Each amino acid also has another atom or a group of atoms bonded to the alpha carbon which are also known as the R group or the variable group of the side chain.There are 20 common amino acids present in natural proteins and each amino acid has the same backbone.
The sequence and number of amino acids determines protein's shape,size and also its function. Each amino acid is attached to the other by a covalent bond formed by a dehydration reaction.
Learn more about amino acids,here:
https://brainly.com/question/15687833
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Considere uma molécula de glicose (C6H12O6) e indique: a-) O número de átomos de carbono_____________________ b-) O número de átomos de hidrogênio __________________ c-) O número de átomos de oxigênio ___________________ d-) Quantos átomos teremos ao todo se tivermos 8 moléculas dessa substância? _______ e-) Quantos átomos teremos de cada elemento com 20 moléculas de glicose
Answers
Answer:
Considere uma molécula de glicose (C6H12O6) e indique: a-) O número de átomos de carbono = 6 b-) O número de átomos de hidrogênio = 12 c-) O número de átomos de oxigênio = 6d-) Quantos átomos teremos quando descubro se temos 8 moléculas dessa substância?
48 oxigênio, 48 carbono e 96 hidrogênio e-) Quantos átomos de cada elemento teremos com 20 moléculas de glicose?
160 de oxigênio e carbono e 240 de hidrogênio.
Explanation:
A glicose é uma das moléculas mais usadas no organismo humano, pois é uma molécula em que sua decomposição é muito mais fácil que os aminoácidos, portanto, eles produzem como produto a moeda de energia que é ATP mais facilmente do que outros alimentos .
A glicose não é encontrada apenas em alimentos açucarados, isso é um mito, na verdade é a unidade de carboidratos (de assados a doces)
The initial temperature of a bomb calorimeter is 28.50°C. When a chemist carries out a reaction in this calorimeter, its temperature decreases to 27.45°C. If the calorimeter has a mass of 1.400 kg and a specific heat of 3.52 J/(gi°C), how much heat is absorbed by the reaction?
Answers
Answer:
D. 5,170 J
Explanation:
sodium chloride is called an electrovalent compound where as carbon dioxide is called covalent compound why
Answers
Electrovalent compounds are those that are created when one or more electrons are transferred from one atom to another inside the compound. NaCl is an electrovalent substance because it shares an electron with other compounds to produce them.
What are compounds ?A material created by chemically joining two or more distinct components. Examples of compounds are table salt (NaCl), which is generated from the elements sodium and chloride, and water (H2O), which is created from the components hydrogen and oxygen.
One carbon atom and two oxygen atoms combine to form carbon dioxide. One carbon dioxide molecule contains four covalent connections. Because neither carbon nor oxygen are metals, we can infer that carbon dioxide is a covalent molecule.
Pure substances known as compounds are created chemically when two or more elements are combined in a specific mass proportion. Chlorine and sodium combine to form sodium chloride (common salt).
Thus, sodium chloride is called an electrovalent compound whereas carbon dioxide is called covalent compound.
To learn more about compound, follow the link;
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1) In 1.31 g of a chloride of titanium, there is 0.528 g of titanium. What is the empirical formula of this titanium chloride?
Answers
Answer:
TiCl2
Explanation:
Mass of the chloride of titanium= 1.31 g
Mass of titanium= 0.528 g
Therefore mass of chlorine = 1.31-0.528 = 0.782 g
To determine the empirical formulae of the titanium chloride, divide the mass of each element by its relative atomic mass and divide through by the lowest ratio.
Ti- 0.528/48 = 0.011, Cl- 0.782/35.5 = 0.022
Ti- 0.011/0.011 , Cl- 0.022/0.011
Ti- 1, Cl-2
Hence the required empirical formula is TiCl2
HELP! 10 points rewarded, plus, best answer gets BAINLIEST!!
Answers
Answer:
4.08 grams
Explanation:
Essentially, we're looking for the mass of HCl that "matches" 3.26 grams of magnesium hydroxide.
First, convert 3.26 grams of [tex]Mg(OH)_2[/tex] into moles by dividing by the molar mass. The molar mass of [tex]Mg(OH)_2[/tex] is 24.3 + 16 * 2 + 1 * 2 = 58.3 g/mol. So, 3.26 grams is equal to:
3.26 g ÷ 58.3 g/mol = 0.0559 mol [tex]Mg(OH)_2[/tex]
Notice that from the chemical equation, magnesium hydroxide and hydrochloric acid (HCl) have a ratio of 1 to 2. In other words, for every 0.0559 moles of [tex]Mg(OH)_2[/tex], there are 0.0559 * 2 = 0.112 moles of HCl.
Finally, convert moles of HCl to grams by multiplying 0.112 by the molar mass, which is 1 + 35.45 = 36.45 g/mol:
0.112 mol HCl * 36.45 g/mol = 4.08 g HCl
The answer is thus 4.08 grams.
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Which question would most likely be studied by a physicist?
A. Were there ever any living organisms on Mars?
B. How can the forces on a space probe be controlled so it will land
on Mars?
O C. What type of substances make up the soil on Mars?
O D. Should the government spend taxpayers' money to send space
probes to Mars?
Answers
Answer:A
Explanation: Were there any living organisms is the answer because physics is the study of matter,its motion and behaviour of space and time and some other topics like energy and force.
Answer:
B
Explanation:
Forces and vectors on a probe are a physics thing
A glass cup of orange juice is found to have pOH of 11.40. Calculate the concentration of the hydrogen ions in the juice.
Answers
Answer: The concentration of hydrogen ion is 2.5 x 10∧-3.
Explanation:
It is well known that; pH + pOH = 14
∴ pH + 11.40 = 14
pH = 14 -11.40 = 2.60
Remember that,
pH = - Log [ H+ ]
2.60 = - log [H+]
To get the hydrogen ion concentration, we take the anti-log of 2.60.
[H+] = Antilog 2.60 = 2.5 x 10∧-3.
what is Lfusion in the equation Q=mLfusion
Answers
Answer:
[tex]L_{\text{fusion}[/tex] is latent heat of fusion.
Explanation:
Latent heat is basically termed as hidden heat. It is defined as the amount of heat required to change 1 g of a substance at the temperature of its melting point from the solid to the liquid state at constant temperature.The formula that relates heat and latent heat of fusion is given by :[tex]Q=mL_{\text{fusion}}[/tex]
Here,
m is mass of substance
[tex]L_{\text{fusion}[/tex] is latent heat of fusion.
Halogens are active non metal
Answers
Answer:
True
Explanation:
They are actively non metals due to their electron configuration and number of valence electrons
Why does a perfume bottle burst when placed inside the flame?
Answers
Answer:
Explanation:
It is because they contain ethyl alcohol and they are inflammable. The perfume contains alcoholic substances like the ethyl alcohol or the ethanol. After reaching the flash point,the combustion of ethanol takes place inside the bottle and the internal combustion created pressure causes explosion.
Hope this helps
plz mark as brainliest!!!!!!!
Answer:
because they contain ethyl alcohol and they are inflammable.
Jack tries to place magnets on his refrigerator at home, but they won’t stick. What could be the reason?
Answers
Answer:
The body of the refrigerator isn’t made of magnetic material.
Explanation:
Same reason why a magnet doesn't stick to a paper or a plastic is the reason behind why Jack's refrigerator is acting out because may be it isn't made of magnetic materials like iron, steel etc, but rather made up of non magnetic things like porcelain, wood etc.