Answer: substances formed as a result of chemical reaction are called PRODUCTS.
Explanation:
A chemical reaction can be defined as a reaction in which substances known as the REACTANTS makes or breaks it's bonds to form another substance usually referred to as the PRODUCT. Usually, a new substance which is referred to as the product that is formed is different from the original reacting substances. Some of the characteristics of a chemical reaction include:
--> colour change,
--> heat production,
--> precipitation
The rate at which these chemical reaction occurs depends on some factors such as pressure, temperature and concentration of the reactants
There are different examples of chemical reaction which includes:
--> Rusting of iron: this occurs when iron and oxygen combines to form a mixture of iron oxides, which is the product of the chemical reaction.
--> The burning of magnesium in air: in this Chemical reaction, magnesium reacts with oxygen to form magnesium oxide which is the product of the chemical reaction.
2Mg(s) + O2(g) △→ 2MgO(s)
--> Production of table salt: this is formed from the reaction of sodium and chloride to give sodium chloride as the product of the chemical reaction.
Therefore in a chemical reaction, no atom is destroyed or created but a new PRODUCT is formed from reactants.
when 3.18g of copper(ii)oxide was carefully heated in a stream of dry hydrogen, 2.54g of copper and 0.72g of water was formed. Determine the number of moles of hydrogen atoms which combine with one mole of oxygen atoms. Show your working.
Answer:
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What will the pH of 1.50 L of pure water water be if 2.0 mL of 4.0 M HCl is added? By how much has the pH changed? What will the pH of the solution in part b be if 2.0 mL of 4.0 M HCl is added? By how much has the pH changed?
Answer:
Part A
pH ≈ 2.273
Part B
ΔpH ≈ -4.726
Part C
pH ≈ 1.973
Part D
ΔpH ≈ -0.301
Explanation:
Part A
The pH of a solution is given by the negative concentration of hydrogen ions in the solution
2.0 mL = 0.002 L
The number of moles of HCl in 2.0 mL of 4.0 M HCl is given as follows;
1 Liter of 4.0 M HCl contains 4.0 moles of HCl
2.0 mL = 0.002 L 4.0 M HCl contains 0.002 L/(1 L) × 4.0 M = 0.008 moles of HCl
The concentration of 0.008 moles in 1.50 L is given as follows;
Concentration = The number of moles/(The volume in liters)
∴ The concentration of 0.008 moles in 1.50 L, C = 0.008 moles/(1.5 L + 0.002 L)
∴ The concentration of 0.008 moles in 1.50 L, C ≈ 0.00533 moles/liter = 0.00533 M HCl
Given that HCl is a strong acid, we have that HCl dissociates completely to give equal number of H⁺ and Cl⁻ ions;
The number of moles of [H⁺] in the solution = 0.00533 moles
The pH of the solution = -log[H⁺]
∴ pH = -log[5.33 × 10⁻³] ≈ 2.273
The pH of the 1.5 L of pure water will be approximately 2.273
Part B
The pH of the pure water has changed from neutral (pH = 7) tp pH = 2.273
The change in pH is ΔpH = 2.274 - 7 = -4.726
ΔpH ≈ -4.726
Part C
When 2.0 mL of the 4.0 M HCl is added, the solution above, we have;
C = (0.008 + 0.008)/(1.5 + 0.002 + 0.002) ≈ 1.06383 × 10⁻²
The concentration of the solution becomes, C ≈ 1.06383 × 10⁻² mole/liter
The pH becomes, pH = -log(1.06383 × 10⁻²) ≈ 1.973
Part D
The amount by which the pH has changed, ΔpH ≈ 1.973 - 2.274 = -0.301.
Help, please I don't understand what I have to do
Answer:
Is there a picture To go with this?
Explanation:
A gas has a volume of 1.22L at 179K. Once heated, the same gas now has a volume of 6.1L at 285K and 1.34atm. What was the original pressure of the gas?
86.30 mL of an HCl solution was required to neutralize 31.75 mL of 0.150 M NaOH. Determine the molarity of the HCI.
Answer:
0.055M
Explanation:
Using the formula as follows:
CaVa = CbVb
Where;
Ca = concentration of acid (M)
Cb = concentration of base (M)
Va = volume of acid (mL)
Vb = volume of base (mL)
According to the information given in this question, Ca (HCl) = ?, Cb (NaOH) = 0.150, Va (HCl) = 86.30mL, Vb (NaOH) = 31.75mL
Using CaVa = CbVb
Ca = CbVb ÷ Va
Ca = (0.150 × 31.75) ÷ 86.30
Ca = 4.7625 ÷ 86.30
Ca = 0.055M
how does lactic acid make milk sour?
Answer:
but you should
Explanation:
but you should
If an object is not accelerating, you can be sure that
A. its speed is 0 m/s.
B. it has a mass of 0 kg.
c. the net force acting on it is O N.
Answer:
A
Explanation:
It's not moving so it would be going 0 meters per second
Answer:
I think its A
Explanation:
. Which of the following is not a product of photosynthesis?
O A. Carbon dioxide
O B. Glucose
O C. Oxygen
Answer:
The answer would be a
Explanation:
That is what goes into the plant and oxygen IS an outcome
Need help fast! Would love if you could explain... but if not that’s ok
A molecule contains 52.20 grams of manganese and 3.80 g of carbon what is its empirical formula
MnC3
Mn3C
Answer: Mn3C is the corrects answer
Trust me :)
15.0 g of potassium chlorate is melted so that it will then decompose. What mass of oxygen is produced assuming all of the original potassium chlorates fully decomposes?
Answer:
5.875 g of Oxygen
Explanation:
We must first balance our decomposition equation KClO3 -> K + ClO3
The amount of oxygen in CLO3 is 3 times the original. We begin by converting 15g of KClO3 to moles. 15 / (39.1 + 35.45 + 3(16) ) = 0.122 mols.
Then we go to moles of oxygen,
.122 * 3 = 0.367 mols of Oxygen
Then to grams of Oxygen
.367 * 16 = 5.875 g
Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) Electron loss is always associated with an increase in oxidation number. (2) An exothermic reaction occurs when the energy required to break bonds in reactants is less than the energy released by bond formation in the products. (3) The concentrations of pure liquids and pure solids are never included in an equilibrium constant expression because such concentrations never change.
Answer:
Electron loss is always associated with an increase in oxidation number- True
An exothermic reaction occurs when the energy required to break bonds in reactants is less than the energy released by bond formation in the products. True
The concentrations of pure liquids and pure solids are never included in an equilibrium constant expression because such concentrations never change. True
Explanation:
Oxidation implies loss of electrons. When a specie looses electrons, its oxidation number increases. For instance; Fe(s) -----> Fe^2+(aq) + 2e implies an increase in oxidation number of Fe from 0 to +2.
In an exothermic reaction, the energy required to break the bonds in the reactants is less than the energy released when new bonds form in the products.
We do not include the concentrations of pure liquids and pure solids in the equilibrium constant expression because the concentration of these do not change significantly throughout the reaction.
Set up the conversion chart below to find how many molecules are in 4.6 moles of ammonium nitrate (NH4NO3
)?
Answer: There are [tex]27.701 \times 10^{23}[/tex] molecules in 4.6 moles of ammonium nitrate [tex](NH_{4}NO_{3})[/tex].
Explanation:
According to the mole concept, there are [tex]6.022 \times 10^{23}[/tex] molecules present in 1 mole of every substance.
Hence, the number of molecules present in 4.6 moles of ammonium nitrate are calculated as follows.
[tex]4.6 \times 6.022 \times 10^{23}\\= 27.701 \times 10^{23} molecules[/tex]
Thus, we can conclude that there are [tex]27.701 \times 10^{23}[/tex] molecules in 4.6 moles of ammonium nitrate [tex](NH_{4}NO_{3})[/tex].
A gas is held at 120.4 kPa and 333K. When the temperature is decreased to
275K at a constant volume, calculate the new pressure in the container.
Type your answer with the correct number of sig figs and units. *
Help please 100 points!!
Answer:
....
Explanation:
Why are models used to represent atoms?
O A. Atoms are too small to see.
O B. Models are completely accurate.
O C. Models explain new evidence.
O D. Models never change over time.
True or False: The moon's gravity affects the oceans nearest the moon because the moon's gravity pulls water into a tidal bulge.
Answer: The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. These bulges of water are high tides
Explanation:
The moon's gravity affects the oceans nearest the moon because the moon's gravity pulls water into a tidal bulge is a true statement.
What is tidal force?The tidal force is the result of the moon's gravitational pull.
The tidal force causes Earth—and its water—to bulge out on its closest and furthest sides from the moon. High tides cause these water bulges.
Thus, the statement is correct.
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how many moles of iron are in 4.8 x 10^24 atoms of iron
Answer:
7.97 moles
Explanation:
The number of moles (n) of iron (Fe) in this question can be calculated by dividing its number of atoms by Avogadro's number (6.02 × 10²³ atoms).
That is;
n = number of molecule ÷ Avogadro's number
According to this question, the number of atoms of Fe is given as 4.8 x 10²⁴ atoms.
Hence,
n = 4.8 x 10²⁴ ÷ 6.02 × 10²³
n = 4.8/6.02 × 10^(24-23)
n = 0.797 × 10¹
n = 7.97 moles
Find the force of an object that has an acceleration of 6.7 m/s2 and a mass of 12 kg.
Which illustration represents a sound wave?
A or B
no link or i will report,plz help this is a test
name any ten trainings that provide the opportunity of foreign employment
Answer:
• Abogado
• Administrador o conservacionista de campo
• Agrícola o agrónomo
• Apiculturísta
• Arquitecto
• Arquitecto ambiental
• Asistente de investigación
• Astrónomo
• Bioquímico
• Científico animal
• Científico avícola
• Científico de suelo
• Consejero vocacional
• Contador
• Criador animal
• Economista
• Entomólogo
• Epidemiólogo
• Farmacólogo
• Físico
• Fitogenetista
• Forestal
• Genetista
• Geoquímico
• Geofísico
• Horticultor
• Ingeniero
• Matemático (incluyendo estadístico)
• Meteorólogo
• Nutriólogo
• Profesor
• Químico
• Silviculturiasta (incluyendo forestalista)
• Terapeuta recreativo
• Topógrafo
• Trabajador social
• Urbanista (incluyendo geógrafo)
• Zoologísta
• Técnico científico de cualquiera de las siguientes disciplinas: ciencias agrícolas, astronomía, biología, química, ingeniería, silvicultura, geología, geofísica, meteorología o física
Explanation:
Use the drop-down menus to match the alkanes with the correct name.
CH3CH2CH2CH2CH2CH2CH2CH3
CH3CH2CH2CH3
CH4
CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3
CH3CH3
the answers are :
octane
butane
methane
decane
ethane
Answer:
✔ octane
CH3CH2CH2CH2CH2CH2CH2CH3
✔ butane
CH3CH2CH2CH3
✔ methane
CH4
✔ decane
CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3
✔ ethane
CH3CH3
Explanation:
An alkane contains only carbon and hydrogen. The following are the accurate names of the compounds;
CH3CH2CH2CH2CH2CH2CH2CH3 - octaneCH3CH2CH2CH3 - butaneCH4 - methaneCH3CH2CH2CH2CH2CH2CH2CH2CH2CH3 - decaneCH3CH3 - ethaneWhat is an alkane?An alkane is a compound whose only functional group is the carbon - carbon single bond. This compounds contain only carbon and hydrogen.
The correct names of the compounds are;
CH3CH2CH2CH2CH2CH2CH2CH3 - octane
CH3CH2CH2CH3 - butane
CH4 - methane
CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3 - decane
CH3CH3 - ethane
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1.
How does light behave when it is shined on an object?
Answer:
Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. For a smooth surface, reflected light rays travel in the same direction.
Explanation:
Influences the loudness of a sound
Given the balanced equation representing a reaction:
H2SO3 + H2O « H3O+ + HSO3-
According to one acid-base theory, the H2SO3 molecules act as (AKS 5g)
Answer:
An acid because they donate H^+ ions
Explanation:
Let us look at the equation again;
H2SO3 + H2O « H3O+ + HSO3-
An acid donates hydrogen ion while a base accepts hydrogen ion. Hence, we have to look at which species that acted as hydrogen ion donors or acceptors.
We can clearly see that H2SO3 acted as a hydrogen ion donor while H2O acted as a hydrogen ion acceptor.
Thus, H2SO3 acted as an acid by donating hydrogen ions.
In the reaction N2 + 3H2—> 2 NH3, what is the mole ratio of N2 to
NH3?
Select one:
O a. 1:1
O b. 2:3
O c. 1:3
O d. 1:2
Answer:
hey,the answer is d, 1:2
Answer: D
Explanation:
The equation shows that one mole of nitrogen reacted with three moles of hydrogen to produce two moles of ammonia.
Which of the following characteristics can be used to classify an organism into a taxonomic domain? Being heterotrophic or autotrophic O Presence of nucleus in cells Being unicellular or multicellular O Mode of reproduction
Answer:
O Presence of nucleus in cells
Explanation:
Which of the following is an acid-base neutralization reaction?
A) C3H8 + 5 O2 --> 3 CO2 + 4H20
B) 2 MgO + O2 --> 2 Mgo
C) Pb(NO3)2 + 2KI --> 2 KNO3 + Pblz
D) H2SO4 + 2 KOH --> K2SO4 + 2 H2O
Answer:
Explanation:
Answer: D
STRONG ACIDS:
HBr
HCl
HI
HNO3
HClO4
H2SO4
What does change in different types of milk?
1.
2.
Answer:
the flavour or the taste or the packaging
If you start with 6 moles of N2 and 6 moles of H2 (meaning you won't have enough of 1 of the ingredients), how many moles of NH3 would you be able to make?
Answer:
[tex]4molNH_3[/tex]
Explanation:
Hello there!
In this case, according to the given information it will be firstly necessary to set up the chemical equation taking place:
[tex]N_2+3H_3\rightarrow 2NH_3[/tex]
We infer we need to calculate the moles of NH3 by using both of the moles of N2 and H2 at the beginning, in order to identify the limiting reactant:
[tex]n_{NH_3}=6molN_2*\frac{2molNH_3}{1molN_2}=12molNH_3\\\\ n_{NH_3}=6molH_2*\frac{2molNH_3}{3molH_2}=4molNH_3\\[/tex]
Thus, since hydrogen yields the fewest moles of ammonia, we conclude that we are just able to yield 4 moles of NH3.
Regards!
PLEASE HELP! NO LINKS! CHEMISTRY!
Solution A has a pH of 2.0. Solution B has a pH of 5.0. Which solution is more acidic? Based on the H+ ion concentrations in the two solutions, how many times more acidic?
Answer:
Solution A is 1,000 times more acidic than Sol. B
Explanation:
for pH values we use scientific notation:
-log10 c (where c is the hydrogen ion concentration) is used to notate pH value (think of it as a unit)
ie:
10^-2 is sol A 10^-5 is sol B
5-2 is 3
10^-3 = 1000
there's a diff of 1,000 between the solutions.
The acidity or alkalinity of a solution depends on the hydronium ion concentration and hydroxide ion concentration. Here the solution A of pH 2.0 is more acidic than the solution of pH 5.0.
What is pH?The pH of a solution is defined as the negative logarithm to the base 10 of the value of the hydronium ion concentration in moles per litre. When the pH of the solution is less than 7 it is acidic whereas when pH is greater than 7, it will be basic.
The pH of the solution is calculated by the equation:
pH = - log [H₃O⁺]
Then the concentration of H₃O⁺ is:
[H₃O⁺] = 10⁻pH
At pH = 2.0, [H₃O⁺] = 10⁻² = 0.01
At pH = 5.0, [H₃O⁺] = 10⁻⁵ = 0.00001
Thus here the Solution A is 1,000 times more acidic than Solution B.
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Read the scenario and match the symbiotic relationship.
Question 1 options:
commensalism
mutualism
parasitism
1.
Nitrogen-fixing bacteria get a place to live and food in the roots of plants while helping the plant
2.
Bromeliads are plants that live in the tall trees in the rainforest. The tree is not harmed by them.
3.
Ticks can attach to the skin of humans or other mammals. The ticks feed on the blood to grow.
Answer:
__3__parasitism-Ticks can attach to the skin of humans or other mammals. The ticks feed on the blood to grow.
__1__mutualism-Nitrogen-fixing bacteria get a place to live and food in the roots of plants while helping the plant.
__2__commensalism-Bromeliads are plants that live in the tall trees in the rainforest. The tree is not harmed by them.
Explanation:
The word that describes each statement would be mutualism, commensalism, and parasitism respectively.
What is symbiosis?It is a form of interaction involving two organisms of different species.
There are different types of symbiotic interactions:
Commensalism: one of the organisms gains from the other. The other organism neither gains nor gets hurt from the interaction.Mutualism: both interacting organisms benefit from the relationship without losing in any way.Parasitism: One organism, the parasite, benefits while the other, the host, is harmed. This often leads to the death of the host.More on symbiotic relationships can be found here:https://brainly.com/question/3350498
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