Ok. Sodium is used in the everyday things we eat or known as naCI. It is also used a reactor for nuclear things. It is also added to snow to de-ice the roads in winter.
What is the mass of 2.70 moles of magnesium chloride, MgCl2?
First, calculate the molar mass of MgCl2:
Mg: 1 x 24.30 = 24.30
Cl: 2 x 35.45 = 70.9
24.30 + 70.9 = 95.2g/mol
Mole = Mass / Molar Mass
2.70 moles = Mass / 95.2 g/mol
Mass = 2.70 mol x 95.2 g/mol
Mass = 257.04g
Answer: The mass of magnesium chloride is 257.1 grams.
Explanation:
To calculate the mass of magnesium chloride for given number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
We are given:
Moles of magnesium chloride = 2.70 moles
Molar mass of magnesium chloride = 95.21 g/mol
Putting values in above equation, we get:
[tex]2.70moles=\frac{\text{Mass of magnesium chloride}}{95.21g/mol}\\\\\text{Mass of magnesium chloride}=(2.70mol\times 95.21g/mol)=257.1g[/tex]
Hence, the mass of magnesium chloride is 257.1 grams.
3.01 Quiz: Atomic Number and the Periodic Law
ps
Which of the following characteristics was not included in Dmitri Mendeleev's periodic table?
distribution of elements determined by electron configuration
What is the primary atomic characteristic that Mendeleev used to organize the periodic table?
atomic mass
Mendeleev left several blank spaces in his original periodic table. What did those spaces represent?
elements that had yet to be discovered
According to the periodic law, what is the relationship between elements and periods?
Element properties repeat from period to period.
Which of these sets of elements has similar properties? Consult the periodic table.
strontium, magnesium, calcium, beryllium
Answer:
The answer is Dissemination of components controlled by electron design.
Explanation:
the Aufbau rule, the Pauli rejection guideline, and Hund's rule,tell you how to discover the electron designs of particles. As indicated by the aufbau standard, electrons possess the orbitals of most reduced vitality first, Pauli-prohibition rule, and Hund's Rule. The electronic setup of cations is doled out by evacuating electrons first in the peripheral p orbital, trailed by the s orbital lastly the d orbitals.
Answer these please! 23 points!
1. Why is hydrogen set apart by itself?
2. How do valence electron configurations of the alkali metals compare with each other?
3. Why are the alkaline-earth metals less reactive than the alkali metals?
4. In which groups of the periodic table do the transition metals belong?
5. What properties do the halogens have in common?
For the first question the answer is
The "s" orbital can only hold a maximum of two electrons. ... Elements in the each group have the same number of valence electrons. Why is hydrogen set apart by itself? Hydrogen does not belong to a single group b/c it can be considered an alkali metal, but it is also a gas.
1. Hydrogen is set apart by itself due to its unique properties that do not fit neatly into any specific group in the periodic table. 2. The alkali metals have similar valence electron configurations, each having one valence electron in their outermost energy level. 3. The alkaline-earth metals are less reactive than the alkali metals because they have two valence electrons in their outermost energy level, requiring more energy to lose them. 4. The transition metals belong to groups 3 to 12 in the periodic table, characterized by partially filled d orbitals in their electron configurations. 5. The halogens, belonging to group 17, share common properties like having 7 valence electrons, high reactivity, and forming acidic compounds when combined with hydrogen.
1. Hydrogen is set apart by itself because it does not fit neatly into any specific group in the periodic table. It has unique properties that are distinct from both the alkali metals and the halogens. While it can form positive ions like the alkali metals, it can also gain an electron to form negative ions like the halogens. Additionally, hydrogen can form covalent bonds with other elements, unlike the alkali metals and halogens. Due to these differences, hydrogen is considered a non-metal and is placed separately at the top of the periodic table.
2. The valence electron configurations of the alkali metals are similar as they all have one valence electron in their outermost energy level. For example, lithium has a valence electron configuration of 2s¹, sodium has 3s¹, potassium has 4s¹, and so on. This single valence electron makes the alkali metals highly reactive, as they readily lose it to form positive ions, achieving a stable electron configuration.
3. The alkaline-earth metals are less reactive than the alkali metals because they have two valence electrons in their outermost energy level. These electrons are held more tightly by the nucleus compared to the single valence electron of alkali metals. As a result, alkaline-earth metals require more energy to lose their valence electrons and become positive ions. While they are still reactive, they are not as reactive as the alkali metals.
4. The transition metals belong to groups 3 to 12 in the periodic table. These elements have partially filled d orbitals in their electron configurations, which gives them unique properties, such as forming colored compounds, being good conductors of electricity, and having high melting and boiling points. They are often used as catalysts in chemical reactions due to their ability to undergo multiple oxidation states.
5. The halogens have several properties in common. They belong to group 17 of the periodic table and have 7 valence electrons in their outermost energy level. Halogens are highly reactive non-metals, and they readily gain one electron to achieve a stable electron configuration. They have high electronegativity, making them strong oxidizing agents. Halogens exist as diatomic molecules in their elemental form (e.g., Cl₂, Br₂, I₂) and have a characteristic color and odor. Additionally, they form acidic compounds when combined with hydrogen, such as hydrochloric acid (HCl) and hydrofluoric acid (HF).
To learn more about valence electron configurations, here
https://brainly.com/question/28977387
#SPJ6
Identify the type of reaction represented by each equation.
A: H2 + Cl2 → 2HCl
B: CH4 + 2O2 → CO2 + 2H2O
Equation A represents a _________ reaction, and equation B represents a_______ reaction.
choices for both blanks
combustion
decombustion
synthesis
double displacement
single displacement
choose one for each blank
there are some notes and examples in the images
my opinions are
1.blank---snythesis
2blank--combustion
please tell me if im correct
16pionts
Answer : Equation A represents a synthesis reaction, and equation B represents a combustion reaction.
Explanation :
A : [tex]H_2+Cl_2\rightarrow 2HCl[/tex]
Equation A is a synthesis reaction in which the two reactants combine to form a single product.
B : [tex]CH_4+2O_2\rightarrow CO_2+2H_2O[/tex]
Equation B is a combustion reaction in which the a hydrocarbon react with an oxygen to give carbon dioxide and water a s a product.
Hence, the equation A represents a synthesis reaction, and equation B represents a combustion reaction.
From the illustration, the type of reaction represented by equation A would be a synthesis reaction while that of B would be a combustion reaction.
In synthesis reactions, two or more atoms of different elements or molecules come together to form a product. In equation A, H2 and Cl2 come together to form HCl. Thus, A is a synthesis reaction.
In combustion reactions, substances react in oxygen to generate new products, usually accompanied by light and the generation of heat. In equation B, CH4 reacts with O2 to produce CO2 and H2O with the production of heat. Thus, B is a combustion reaction.
More on different types of reactions can be found here: https://brainly.com/question/20479735
a graduated cylinder weighed 83.2 g and 57.0 mL of water was added to the graduated. How much does it weigh now?
The new weight of the graduated cylinder after adding 57.0 mL of water is 140.2 g.
To determine the new weight of a graduated cylinder after adding water, we need to consider the mass of the water added. The step by step solution is as follows:
First, we know the mass of the empty graduated cylinder is 83.2 g.We added 57.0 mL of water to the cylinder.Since the density of water is 1.0 g/mL, the mass of the water is equivalent to its volume. Therefore, the mass of the 57.0 mL of water is 57.0 g.Now, add the mass of the water to the mass of the empty graduated cylinder to get the total mass:Total Mass = 83.2 g (graduated cylinder) + 57.0 g (water) = 140.2 g
Thus, the graduated cylinder now weighs 140.2 g.
You run a “5k” for charity. How many feet do you run
It would roughly be 16,404 feet. Or if you wanted to be more specific 16,404.2. I hope this helps.
Easiest way is dimensional analysis.
[tex]5km * \frac{3280.84ft}{1km} = 16404.2[/tex]
You have 47.0 mL of a 0.400 M stock solution that must be diluted to 0.100 M. Assuming the volumes are additive, how much water should you add?
Hey there!
Moles of stock solution:
47.0 mL in liters : 47.0 / 1000 => 0.047 L
n = M * V
n = 0.400 * 0.047
n = 0.0188 moles
Volume final :
M = n / V
0.100 = 0.0188 / V
V = 0.0188 / 0.100
V = 0.188 L => 188 mL
Therefore Watter added :
volume final - volume initial
188 mL - 47.0 mL => 141 mL
Hope That helps!
All moving objects have momentum.
true or false ?
Final answer:
The statement that all moving objects have momentum is true because momentum is a product of an object's mass and velocity, both of which are non-zero for moving objects.
Explanation:
The statement that all moving objects have momentum is true. Momentum is the product of an object's mass and velocity and is given by the equation p = mv, where p is momentum, m is mass, and v is velocity. Since any object that is moving has a velocity greater than zero and a non-zero mass, it will indeed have momentum. Additionally, momentum is a vector quantity, which means it has both magnitude and direction, and it is measured in kilograms meters per second (kg·m/s).
To further elucidate, let's consider the Law of Conservation of Momentum, which states that in a closed system, the total momentum remains constant unless acted upon by an external force. Therefore, if two objects collide and come to rest, as mentioned in the problem, the momentum is not lost but transferred, ensuring the total momentum before and after the collision is the same.
List the number of protons, neutrons, and electrons in... ( there is a pic)
Carbon:
Protons: 6
Neutrons: 7
Electrons: 6 (in a neutral atom)
Hope that helps:)
Name the region of the atom where protons and neutrons are located. This region is indicated by label B. Name the region of the atom where electrons are located. This region is indicated by label A. Locations of Subatomic Particles
The region of the atom where protons and neutrons are located (B) is called the nucleus.
The region of the atom where electrons are located (A) is called orbits.
An atom is made up of electrons in orbits and protons and neutrons in the nucleus.
In the atom, there is an innermost part where we find the subatomic particles called neutrons and protons. This region of the atom is called the nucleus. Most of the mass of the atom is concentrated here.
The electrons are found to move round this nucleus in circular paths called orbits.
In the figure, label A refers to orbits while label B refers to the nucleus.
https://brainly.com/question/1596638
Answer:
1st is Nucleus and 2nd is Orbitals
Explanation:
Which are examples of reversible reactions? Check all that apply.
Iodine and chlorine can react to form iodine chloride. At equilibrium, the system contains a mixture of iodine, chlorine, and iodine chloride.
Sodium hydroxide and hydrochloric acid react readily to form sodium chloride and water. The reverse reaction does not occur.
Hydrogen and nitrogen react to form ammonia. At low pressure, the equilibrium system contains all three substances.
Answer:
These first and the last are examples of reversible reactions:
Iodine and chlorine can react to form iodine chloride. At equilibrium, the system contains a mixture of iodine, chlorine, and iodine chloride.Hydrogen and nitrogen react to form ammonia. At low pressure, the equilibrium system contains all three substances.Explanation:
The reactions that end in a quasi complete conversion of the reactants into the products are said that are not reversible reactions.
Most of the chemical reactions do not reach a complete conversion. They seem to stop without getting complete conversion. The reason is that these reactions are reversible. A reversible reaction is that that can be forward (direct reaction) and backward (inverse or reverese reaction). In these cases, when the equilibrium is reached the rates of the forward and reverse reactions are equal, which explain why the reaction seems to stop, and a mixture of products and reactants will remain.
The two examples of reversible reactions given may be represented in this way:
The double arrow is used to indicate that the reaction is reversible. In the forward reaction, iodine and chlorine react to form iodine chloride, in the reverse reaction iodine chlorice decomposes to form the substances iodine and chlorine.
In the foward reaction, hydrogen a nitrogen combine to form amonia, in the reverse reaction ammonia decomposes producing the substances hydrogen and nitrogen.
Options 1 & 3 are correct! Thank you
What is the term given to the penetrating rays and particles given off by radioactive materials called
Answer: The penetrating rays and particles given off by radioactive materials is called radiation.
Explanation:
The penetrating rays and particles given off by radioactive materials is called radiation.
An element which readily degenerates its nucleus and emits alpha particles, beta particles and gamma rays is called a radioactive element.
For example, uranium, actinium, thorium etc are all radiactive elements.
witch components of the atom are found outside of the nucleus
A protons
B electrons
C neutrons
B all
What happens when an atom loses electron?
Select two options from the following list that qualify as types of pure substances. a substance an atom an element a particle matter a compound
Elements and compounds are examples of pure substances. Elements are made of one type of atom, while compounds consist of two or more types of atoms chemically bonded together.
Elements and compounds are both examples of pure substances.
Elements are the simplest substances made up of only one type of atom. For example, oxygen (O₂) and gold (Au) are elements.Compounds are pure substances formed when two or more types of atoms bond together chemically, such as water (H₂O) and carbon dioxide (CO₂).In summary, matter can be classified into two broad categories: pure substances and mixtures. Pure substances include elements and compounds while mixtures are physical combinations of pure substances.
Which is not an example of symbiosis
Answer:
lepords
Explanation:
The correct answer is: An example of an organism that is not an example of symbiosis would be a predator-prey relationship where the interaction is not obligatory for either species' survival.
Symbiosis is a close and long-term interaction between two different biological organisms. There are three main types of symbiosis: mutualism, commensalism, and parasitism. In mutualism, both species benefit from the interaction. In commensalism, one species benefits while the other is neither harmed nor benefited. In parasitism, one species, the parasite, benefits at the expense of the other, the host.
A predator-prey relationship, such as a lion hunting a zebra, is typically not considered symbiosis because it is usually a short-term interaction and not obligatory for the survival of either species. While both species are involved in an ecological interaction, the relationship is not symbiotic in the sense that it does not meet the criteria of being a close, long-term interaction that is essential to the survival of either species. Each species can potentially find other sources of food, and the interaction does not necessarily occur over a significant portion of the organisms' life spans.
In contrast, examples of symbiosis include:
- The relationship between clownfish and sea anemones, which is a case of mutualism where the clownfish gains protection from predators among the anemone's tentacles, and the anemone benefits from the clownfish's waste as nutrients and the clownfish's defense against anemone predators.
- The relationship between barnacles attached to whales, which is commensalism, as the barnacles get transportation and access to food without significantly harming or benefiting the whale.
- The relationship between tapeworms and their hosts, which is parasitism, as the tapeworm lives in the host's intestine and absorbs nutrients from the host's diet, causing harm to the host.
Therefore, a predator-prey relationship like that of a lion and a zebra is not an example of symbiosis because it lacks the necessary characteristics of a close, long-term, and obligatory interaction for the survival of the involved species."
BRAINLIEST IF CORRECT MUST USE WORK. Which option is an example of a chemical property?
A. boiling point
B. rusting ability
C. melting point
D. density
Rusting ability is a chemical property.
Since the act of rusting creates a new material (an oxide), it is a chemical change. The other three are physical properties, since they do not involve the formation of a new substance.
what is the only force that acts on a falling body when it is in free fall
As learned in an earlier unit, free fall is a special type of motion in which the only force acting upon an object is gravity. Objects that are said to be undergoing free fall, are not encountering a significant force of air resistance; they are falling under the sole influence of gravity.
For which of the following processes would there be a decrease in entropy?
A. Melting ice
B. Separation of a compound
C. Boiling water
D. Freezing water
d. Freezing water!
hope this helps! :3
Final answer:
Correct answer - D, Freezing water. The process with a decrease in entropy is freezing water, as the water molecules become more structured. The freezing process is exothermic, while boiling water is endothermic. The concept of entropy fits within the larger framework of the second law of thermodynamics involving energy transfers.
Explanation:
The process in which there would be a decrease in entropy is D freezing water. Entropy is often associated with randomness or disorder within a system. When water freezes, its molecules become more ordered and structured, which is a transition from a state of higher entropy (liquid water) to a state of lower entropy (ice).
To label the processes as endothermic or exothermic:
a. Water boiling - Endothermic
b. Gasoline burning - Exothermic
c. Ice forming on a pond - Exothermic
The decrease in entropy when water freezes does not violate the second law of thermodynamics because the entropy of the surroundings increases, typically via the release of heat. In thermodynamics, when energy is transferred as heat from one system, the system losing heat decreases in entropy, but the surroundings increase in entropy.
Can someone help me with this it’s due tomorrow can someone plz help me
It’s about science but I’m not sure wh
4. If 0.130 g of p-aminophenol is allowed to react with excess acetic anhydride, what is the theoretical yield of acetaminophen in moles? In grams?
Hey There!
p-aminophenol (109.13 g/mol) + Ac2O (102.09 g/mol) ---> acetominophen (151.16 g/mol)
next, since you already know your limiting reactant (p-aminophenol), convert it to mols :
0.130 g / (109.13 g/mol) = 0.00119 moles
now that's your theoretical max, since its a 1:1 mol ratio, so multiply by the new molecular weight. :
0.00119 * 151.16 = 0.180 g
Hope that helps!
The theoretical yield of acetaminophen is equal to 1.19 × 10⁻³ mol.
What is a theoretical yield?The amount of a product obtained from a chemical reaction is expressed as the yield of the reaction. The amount of product predicted by stoichiometry is known as the theoretical yield, whereas the actual quantity obtained is called the actual yield.
Given the mass of the p-aminophenol = 0.130 g
The reaction between the p-aminophenol and acetic anhydride gives acetaminophen and acetic acid. As given the acetic anhydride is in excess, therefore, p-aminophenol will decide the amount of acetaminophen.
The molar mass of p-aminophenol = 109.13 g/mol
The number of moles of p-aminophenol = 0.130/109.13 = 1.19 × 10⁻³ mol
Therefore, 1.19 × 10⁻³ mol of acetaminophen will be formed.
The molar mass of the acetaminophen = 151.16 g/mol
The mass of the acetaminophen = 1.19 × 10⁻³ × 151.16 = 0.18 g
Therefore, the theoretical yield of acetaminophen is 1.19 × 10⁻³ moles.
Learn more about theoretical yield, here:
https://brainly.com/question/14966377
#SPJ2
what is the hydroxide ion concentration of an unknown acid with a ph of 1.9?
Hey there!:
[ H⁺ ] = [tex]10^{-pH}[/tex]
[H⁺ ] = [tex]10^{-1.9}[/tex]
[ H⁺ ] = [tex]1.26*10^{-2} M[/tex]
Hope that helps!
The concentration of hydroxide ion of unknown acid is [tex]\boxed{7.9344 \times {{10}^{ - 13}}\;{\text{M}}}[/tex]
Further Explanation:
An acid is a substance that has the ability to donate [tex]{{\text{H}}^ + }[/tex] ions or can accept electrons from the electron-rich species. The general dissociation reaction of acid is as follows:
[tex]\text{HA}}\to{{\text{H}}^+}+{{\text{A}}^-}[/tex]
Here, HA is an acid.
The acidic strength of an acid can be determined by pH value. The negative logarithm of hydronium ion concentration is defined as pH of the solution. Lower the pH value of an acid, the stronger will be the acid. At [tex]25\;^\circ {\text{C}}[/tex], pH value of an acid is less than 7.
The formula to calculate pH of acid is as follows:
[tex]{\text{pH}} = -\log\left[ {{{\text{H}}_{\text{3}}}{{\text{O}}^+}}\right][/tex]
Here,
[tex]\left[ {{{\text{H}}_3}{{\text{O}}^ + }} \right][/tex] is the concentration of hydronium ion.
The relation between the concentration of hydronium ion and hydroxide ion is as follows:
[tex]\left[ {{{\text{H}}_{\text{3}}}{{\text{O}}^+}}\right]\left[{{\text{O}}{{\text{H}}^ - }}\right] = {10^{ - 14}}[/tex]
Here,
[tex]\left[ {{{\text{H}}_3}{{\text{O}}^ + }} \right][/tex] is the concentration of hydronium ion.
[tex]\left[ {{\text{O}}{{\text{H}}^ - }} \right][/tex] is the concentration of hydroxide ion.
Given information:
The pH value of unknown acid is 1.9.
To calculate:
The hydroxide ion concentration of unknown acid.
Solution:
Step 1: Initially, we have to calculate the concentration of hydronium ion by using equation (1).
The formula to calculate pH of the unknown acid is as follows:[tex]{\text{pH}} = - \log \left[ {{{\text{H}}_{\text{3}}}{{\text{O}}^ + }} \right][/tex]
...... (1)
Rearrange the equation (1) to calculate the concentration of hydronium ion.
[tex]\left[ {{{\text{H}}_{\text{3}}}{{\text{O}}^ + }} \right] = {10^{ - {\text{pH}}}}[/tex]
...... (2)
Substitute 1.9 for pH in the equation (2).
[tex]\begin{gathered} \left[ {{{\text{H}}_{\text{3}}}{{\text{O}}^ + }} \right] = {10^{ - 1.9}} \\ = 1.2589 \times {10^{ - 2}}\;{\text{M}} \\ \end{gathered}[/tex]
Step 2: The concentration of hydronium ion calculated in step (1) can be used to calculate the concentration of [tex]{\text{O}}{{\text{H}}^ - }[/tex] ions by using the relation (3).
The relation between the concentration of hydronium ion and hydroxide ion is as follows:
[tex]\left[ {{{\text{H}}_{\text{3}}}{{\text{O}}^ + }} \right]\left[ {{\text{O}}{{\text{H}}^ - }} \right] = {10^{ - 14}}[/tex] ...... (3)
Rearrange the equation (3) to calculate the concentration of hydroxide ion.
[tex]\left[ {{\text{O}}{{\text{H}}^ - }} \right] = \frac{{{{10}^{ - 14}}}}{{\left[ {{{\text{H}}_{\text{3}}}{{\text{O}}^ + }} \right]}}[/tex] ...... (4)
Substitute [tex]1.2589 \times {10^{ - 2}}[/tex] for \left[ {{{\text{H}}_{\text{3}}}{{\text{O}}^ + }} \right] in the equation (4).
[tex]\begin{gathered} \left[ {{\text{O}}{{\text{H}}^ - }} \right] = \frac{{{{10}^{ - 14}}}}{{1.2589 \times {{10}^{ - 2}}}} \\ = 7.9434 \times {10^{ - 13}}\;{\text{M}} \\ \end{gathered}[/tex]
Learn more:
1. The reason for the acidity of water https://brainly.com/question/1550328
2. Reason for the acidic and basic nature of amino acid. https://brainly.com/question/5050077
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Acids, bases, and salts
Keywords: pH, acid, pOH, base, hydronium ion, hydrogen ion, hydroxide ion, acidic nature, and basic nature.
Is 2h2 + o2 2h2o a balanced chemical equation?is it obeying the law of conservation of matter
Yes, this is a balanced chemical equation, and it obeys the Law of Conservation of Mass.
A balanced chemical equation obeys the Law of Conservation of Mass if there are the same numbers of each type of atom on each side of the reaction arrow.
2H₂ + O₂ ⟶ 2H₂O
Let’s check the numbers.
Atom On the left On the right
H 4 4
O 2 2
We have the same numbers of H and O atoms on each side of the reaction arrow.
The equation is balanced and it obeys the Law of Conservation of Mass.
Please Please help me, I don't know if this is the right subject But plz!!!!!!!!!!
A consumer is an animal that eats other animals. For example, a snake is a consumer.
BRAINLIEST IF CORRECT PLEASE USE WORK
2) what does the release or absorption of energy indicate?
a) physical and chemical changes
b) neither physical nor chemical changes
c) chemical change
d) physical change
The release or absorption of energy indicates a chemical change. (Option C).
What is chemical change?A chemical change, also known as a chemical reaction, is a process in which one or more reactants are transformed into new substances (products) with different chemical properties.
During a chemical change, the arrangement of atoms is altered, resulting in the formation of new chemical bonds and the breaking of existing ones.
This process often involves the release or absorption of energy in the form of heat, light, or other forms of energy.
Thus, the release or absorption of energy indicates a chemical change.
Option C is the correct answer.
Learn more about chemical change here: https://brainly.com/question/1222323
#SPJ4
A student added 32.60 mL of 0.03020 M NaOH to a 20.0 mL sample of ginger ale before his sample turned pink. (a) How many moles of NaOH did he add to his solution? (b) How many moles of citric acid are in his sample? (c) How many grams of citric acid does this correspond to? (d) How many milligrams? How many mg/mL?
Solution:
molarity= [tex]\frac{\text{moles}}{\text{volume in litres}}[/tex]
(a) Molarity of NaOH, [tex]M_1[/tex]= 0.03020 M
Volume of NaOH added,[tex]V_1[/tex]= 32.60 mL= 0.0326 L
(1L= 1000mL)
Number of moles of NaOH added :
0.03020 M NaOH means 1L of solution contains 0.03020 moles 0.0326 L contains =[tex]0.03020\times 0.0326[/tex] = 0.00098 moles
(b) Equal number of moles of acid will neutralize equal number of moles of base, thus we can apply molarity equation:
Molarity of citric acid, [tex]M_2[/tex]=?
volume of citric acid, [tex]V_2[/tex]= 20 mL= 0.02 L
using formula, [tex](M_1)(V_1)=(M_2)(V_2)[/tex] ,
[tex]M_2= \frac{(M_1)(V_1)}{(V_2)}[/tex]
[tex]M_2= \frac{(0.03020 M)(0.0326 L)}{(0.02 L)}[/tex] = 0.049 M
(c) Grams of citric acid in 20 ml
moles of citric acid = [tex]{M_2}\times V_1[/tex] of solution in Liters = [tex]0.049 \times 0.02[/tex] = 0.00098 moles
Mass of citric acid =[tex]\text{moles}\times \text{Molecular} mass[/tex]
[tex]= 0.00098\times 192.12[/tex] = 0.1882 g
(d) 20 mL solution of ginger ale contains of citric acid
[tex]0.1882 g= 0.1882 \times 1000 mg[/tex] = 188.2 mg (1g = 1000mg)
Since, 20 mL solution of ginger ale contains of citric acid 188.2 mg
so 1 mL of solution contains = [tex]\frac{188.2 mg}{20 mL}[/tex]
= 9.41 mg/ mL
(a)
Molarity = moles of solute / liter of solution
Moles of solute = molarity x liter of solution
Molarity of NaOH = 0.03020 M
Liter of solution = 32.60 mL / 1000 = 0.0326 L
Moles of NaOH = 0.03020 M x 0.0326 L = 9.85 x 10⁻⁴ moles
(b)
The reaction between NaOH and citric acid is as follows:
C₃H₅O(COOH)₃ + 3NaOH → Na₃C₃H₅O(COO)₃ + 3H₂O
As the balanced chemical equation 3 moles of NaOH reacts with 1 mole of citric acid (Na₃C₃H₅O(COO)₃)
Since the moles of NaOH is 9.85 x 10⁻⁴ the moles of citric acid will be (9.85 x 10⁻⁴) / 3 or 3.284 x 10⁻⁴ moles.
Therefore, the moles of citric acid is 3.284 x 10⁻⁴
(c)
Moles = Mass/ Molar mass
Mass = Moles x Molar mass
Moles of citric acid = 3.284 x 10⁻⁴
Molar mass of citric acid = 192.124 g/mol
Mass of citric acid = 3.284 x 10⁻⁴ x 192.124 g/mol =
Therefore, the mass of citric acid is 0.0631 g
(d)
Mass of citric acid = 0.0631 g
1 g = 1000 mg
Therefore, mass of citric acid = 0.0631 x 1000 = 63.1 mg
(e)
Given,
Volume of citric acid = 20.0 mL
20 ml of citric acid has a mass of 63.1 mg
Therefore, miligram per militier = 63.1 mg/20 ml = 3.155 mg/ml
Students of diffrent ages were given the same jigsaw puzzle to put together. They were timed to see how long it took to finish the puzzle
Do you want to know the times
which of the following correctly describes a compound
combination of elements on the periodic table to create a substance. so I think I understand about this okay but I have a 98% on that type of subject
What does the specific heat for a substance indicate? A. the heat released when 1 gram of the substance burns B. the amount of heat required to increase the temperature of 1 gram by 1oC C. the amount of heat required to increase the temperature of 100 grams by 1oC D. the amount of heat required to increase the temperature of 1 gram by 100oC E. the heat released when 100 grams of the substance burns
Answer:
B. the amount of heat required to increase the temperature of 1 gram by 1°C
Explanation:
The heat required by a substance having mass m to raise the temperature of it by ΔT.
Q = m c ΔT
where c is the specific heat of the substance.
[tex] c = \frac{Q}{m\Delta T}[/tex]
Specific heat for a substance is the amount of heat required to increase the temperature of 1 gram by 1°C.
For example, the specific heat capacity of water is 4.186 J/g°C. This means 4.186 J is required to raise the temperature of 1 g of water by 1°C.
Which of the following states an important result of Rutherford's gold-foil experiment?
A. Atoms have mass.
B. Electrons have a negative charge
C. Neutrons are uncharged particles
D. The atom is mostly empty space
Rutherford's gold-foil experiment showed that D. the atom is mostly empty space.
When he shot α particles at a thin gold foil, most of them went straight through the foil without being deflected.
However, a few of the α particles were deflected by rather large angles. He concluded that the atom is mostly empty space with almost all its mass concentrated in a small central nucleus.