Which statement is true about proper storage of flammable liquids? A. Store liquids in approval metal safety containers or original containers. B. Transfer liquids to plastic containers to enable more space on shelves. C. When not in use, containers should be open to allow release of vapor.
Answer: Option (A) is the correct answer.
Explanation:
A flammable liquid is a liquid which immediately catches fire when exposed to air, that is, flammable substances are combustible in nature.
Therefore, they need to be kept safely in a container with a lid that can prevent entrance for air. Hence, otherwise it would be unsafe to handle to liquid.
Thus, we can conclude that store liquids in approval metal safety containers or original containers.
Which factor impacts the possible number of ways in which different atoms can be put together?
what is the name of the compound that has the formula Li2SO3?
a. lithium sulfite
b. lithium sulfate
c. bilithium trisulfate
d. bilithium trisulfide
The name of the compound that has the formula Li₂SO₃ is lithium sulfite, it is an ionic compound, hence option A is correct.
Although lithium sulfate doesn't often increase in solubility with temperature like other salts do, it is soluble in water. Instead, because its dissolution is an exothermic process, its solubility in water declines as temperature rises.
It is simple to hydrolyze and absorb water vapor from the air, which releases gaseous hydrogen sulphide, which is extremely hazardous.
Lithium sulfite easily to dissolve in water, ethanol, acid, and base; difficult to dissolve in alkali.
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Which mineral property can be determined simply by observation
Answer is: luster.
Luster is example of qualitative observations.
Qualitative observations are information about the quality of substances.
In qualitative observation, informations are collected using senses (sight, hearing, taste, smell and touch).
Qualitative observations are not measurable and cannot be recorded in terms of numbers.
Luster is the way light interacts with the surface of a mineral.
Other example is cleavage, the tendency of mineral to split along definite crystallographic structural planes.
A student weighs out 0.477 g of KHP (molar mass = 204.22 g/mol) and titrates to the equivalence point with 36.78 mL of a stock NaOH solution. What is the concentration of the stock NaOH solution? KHP is an acid with one acidic proton.
The molarity of NaOH solution is [tex]\boxed{{\text{0}}{\text{.0635 M}}}[/tex]
Further Explanation:
The concentration is the proportion of substance in the mixture. The most commonly used concentration terms are as follows:
1. Molarity (M)
2. Molality (m)
3. Mole fraction (X)
4. Parts per million (ppm)
5. Mass percent ((w/w) %)
6. Volume percent ((v/v) %)
Molarity is a concentration term that is defined as the number of moles of solute dissolved in one litre of the solution. It is denoted by M, and its unit is mol/L.
The formula to calculate the molarity of NaOH solution is as follows:
[tex]{\text{Molarity of NaOH solution}}=\frac{{{\text{amount}}\;\left({{\text{mol}}} \right)\;{\text{of}}\;{\text{NaOH}}}}{{\;{\text{volume }}\left({\text{L}}\right)\;{\text{of}}\;{\text{NaOH solution}}}}[/tex] ...... (1)
Firstly the volume is to be converted into L. The conversion factor for this is,
[tex]{\text{1 mL} ={\text{1}}{{\text{0}}^{{\text{-3}}}}{\text{ L}}[/tex]
So the volume of NaOH solution can be calculated as follows:
[tex]\begin{aligned}{\text{Volume of NaOH solution}}&=\left({{\text{36}}{\text{.78 mL}}}\right)\left({\frac{{{\text{1}}{{\text{0}}^{-3}}{\text{ L}}}}{{{\text{1 mL}}}}}\right)\\&=0.03678\;{\text{L}}\\\end{aligned}[/tex]
The number of moles of KHP can be calculated as follows:
[tex]{\text{Moles of KHP}} = \frac{{{\text{Given mass of KHP}}}}{{{\text{Molar mass of KHP}}}}[/tex] …… (2)
The given mass of KHP is 0.477 g.
The molar mass of KHP is 204.22 g/mol.
Substitute these values in equation (2).
[tex]\begin{aligned}{\text{Moles of KHP}}&=\left({{\text{0}}{\text{.477 g}}}\right)\left({\frac{{{\text{1 mol}}}}{{{\text{204}}{\text{.22 g}}}}}\right)\\&={\text{0}}{\text{.0023357 mol}}\\\end{aligned}[/tex]
Since KHP is a monoprotic acid and NaOH is also monobasic. Therefore equal moles of KHP and that of NaOH will react and thus become equal. The moles of NaOH is 0.0023357 mol.
The moles of NaOH are 0.0023357 mol.
The volume of NaOH solution is 0.03678 L.
Substitute these values in equation (1).
[tex]\begin{aligned}{\text{Molarity of NaOH solution}}&=\frac{{{\text{0}}{\text{.0023357 mol}}}}{{{\text{0}}{\text{.03678 L}}}}\\&={\text{0}}{\text{.063504 M}}\\&\approx {\text{0}}{\text{.0635 M}}\\\end{aligned}[/tex]
So the molarity of NaOH solution is 0.0635 M.
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Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Concentration terms
Keywords: molarity, NaOH, KHP, monoprotic, amount of NaOH, molarity of NaOH solution, 0.003678 L, 36.78 mL, 0.0635 M, molarity of NaOH solution, 0.477 g and 204.22 g/mol.
The concentration of the stock NaOH solution is 0.0635 mol/L.
Given:
Molar mass of KHP = 204.22 g/mol
Mass of KHP used = 0.477 g
Number of moles of KHP = mass / molar mass
= 0.477 g / 204.22 g/mol
= 0.002336 mol
Since KHP is an acid with one acidic proton, it reacts with one mole of NaOH in a 1:1 ratio.
Therefore, the number of moles of NaOH used in the titration is also 0.002336 mol.
The volume of NaOH solution used = 36.78 mL
= 0.03678 L
The concentration of NaOH solution = number of moles/volume in liters
= 0.002336 mol / 0.03678 L
= 0.0635 mol/L
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whats between -999 and 1000
Which of these are examples of complex patterns of inheritance? Options:
1. light exposure affecting wing color in birds
2. a trait, such as height, being determined by at least four genes
3. a single gene mutation affecting a person’s speech, body strength, and weight
4. three alleles that can determined wing color
5. all of the above
Complex patterns of inheritance include traits affected by environmental factors, polygenic inheritance where traits are controlled by multiple genes, single gene mutations impacting multiple traits, and the presence of multiple alleles for a single trait.
Explanation:The examples of complex patterns of inheritance include:
Light exposure affecting wing color in birds.Polygenic inheritance, such as height being determined by at least four genes.A single gene mutation affecting a person’s speech, body strength, and weight.Three alleles that can determine wing color.All of the above.Polygenic inheritance refers to a trait that is controlled by more than one gene. In humans, traits like skin color, height, and weight are examples of polygenic characteristics. This type of inheritance can result in many possible phenotypes. Additionally, the phenomenon of multiple alleles exists when more than two alleles are present in a population, such as the ABO blood type alleles (IA, IB, and i).
Overall, complex inheritance patterns involve the interaction of multiple genes, the presence of multiple alleles within a population, and can also be influenced by environmental aspects.
Potassium chloride and silver acetate react to produce silver chloride and potassium acetate. Which reaction has occurred?
Answer:
double replacement reaction
Explanation:
which two elements in the periodic table have the same number of electrons in their outer orbitals?
true or false: the part of photosynthesis that does not require light is the Calvin cycle
Which element has the same number of energy levels as aluminum (Al) and the same number of valence electrons as calcium (Ca)? A. Beryllium B. Sodium C. Potassium D. Magnesium
Magnesium (Mg) shares the same number of energy levels as aluminum and the same number of valence electrons as calcium, making it the correct answer.
Explanation:The element that has the same number of energy levels as aluminum (Al) and the same number of valence electrons as calcium (Ca) is magnesium (Mg). Aluminum, with atomic number 13, has an electron configuration of [Ne]3s²3p¹, which means it has 3 energy levels. Calcium, with atomic number 20, has an electron configuration of [Ar]4s², which indicates it has 2 valence electrons. Looking at the options provided, we see that magnesium, which has an atomic number of 12 and an electron configuration of [Ne]3s², shares the same number of energy levels as aluminum (3 energy levels) and the same number of valence electrons as calcium (2 valence electrons).
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how many electrons are present if a bromine ion has a charge of -1
You want to investigate how the color of light affects the growth of plants. The best resource for reliable scientific information to help you with your hypothesis would be a(n)
A. book on the species of plants grown in your area
B.magazine article on gardening
C.article documenting experiments with their results
D.website containing information about light sources
Answer: C.article documenting experiments with their results
Explanation:
An independent variable is the variable that can be changed or manipulated so as to determine the result of such change on the dependent or the experimental variable.
In the given study, the color of light is the independent variable the effect of which is to be determined over the plant growth which is the dependent variable.
The information related to this experiment can be observed on the article documenting the experiments similar experiment. This will have valid and reliable information.
Changes of state are a result of a change in the______of the matter.
Answer: -
Kinetic energy.
Explanation: -
Solids have the least kinetic energy and the highest intermolecular force of attraction among the three states of matter.
When heat energy is supplied to the solid, the kinetic energy of the solid particles increases. At some point, the kinetic energy becomes comparable to the intermolecular force of attraction. At that point solids change into liquids.
When further heat energy is given, at certain point the kinetic energy becomes far greater than the intermolecular forces of attraction. At that point it becomes gas.
Which statements accurately describe density? Check all that apply.
Density is a derived unit of measurement.
Density is measured using only a balance or scale.
Density is measured with units such as grams.
Density is the ratio of mass to volume.
Density is a physical property of an object.
Explanation:
Density is the mass of an object or substance per unit volume. The symbol for density is [tex][/tex] and it can be calculated using the formula as follows.
[tex]\rho[/tex] = [tex]\frac{mass}{volume}[/tex]
Density is derived from mass which can be in grams or kilograms and volume which can be in liters etc. Therefore, density is a derived unit of measurement. We do not need any balance or scale to determine the density.
The statements in the options that accurately describe density are as follows.
Density is the ratio of mass to volume.Density is a physical property of an object. Density is a derived unit of measurement.What provides clues about how igneous rocks were formed? A color B Texture C Luster D Streaks
What are chicken nuggets made of
Gretchen wants to run a test to discover whether glass, copper, wood, or plastic conduct electricity. She sets up a circuit connecting a battery to a light bulb, with a small gap she will use to test the conductivity of the different substances. One at a time, she connects the circuit with the chosen test material, and records whether or not the light bulb comes on. The variables in this experiment are
The plastic, wood, copper, and glass are the variables. The variables in an experiment are the things we can change and then test.
50 pennies or other coins (all coins must be the same value)
If you do not have 50 pennies, you may cut 50 penny shaped pieces of paper and put an x on only one side of each piece of paper.
Procedure:
The coins represent a material that will decay over time. As time passes, some of the material will change from one substance to another. Each time you turn a penny over, you are representing the original (parent material) substance changing into another substance (daughter material).
1. Turn all 50 coins heads up. Imagine that 5 years have gone by.
2. Turn 25 coins tails up. You now have 50% parent material and 50% daughter material. What is the half life of this substance? (20 Points)
3. Imagine that another half life has gone by. Remember that ONLY the parent material can change to the daughter material. Turn over your pennies to represent the passing of another half life. How much total parent material and how much total daughter material do you now have? You may express your answer in number of pennies or in %. (Note: Since you cannot turn over half a penny, round the actual number of pennies you would turn over up.) (20 points)
4. How many half lives will pass before you have only 3 pennies that are parent material and 47 pennies that are daughter material? (20 Points)
Hey!
Hope this helps...
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Question 1: Turn 25 coins tails up. You now have 50% parent material and 50% daughter material. What is the half life of this substance? (20 Points)
Answer:
Based upon the given information, we can assume that the half life of this coin material is 5 years.
Question 2: Imagine that another half life has gone by. Remember that ONLY the parent material can change to the daughter material. Turn over your pennies to represent the passing of another half life. How much total parent material and how much total daughter material do you now have? You may express your answer in number of pennies or in %. (Note: Since you cannot turn over half a penny, round the actual number of pennies you would turn over up.) (20 points)
Answer:
Based upon the given information from Question 2 and Question 3, we can assume that 13 additional coins would be turned over. We started with 50, than flipped 50% of them over, and now another 50% over. We have 12 coins left.
Question 3: How many half lives will pass before you have only 3 pennies that are parent material and 47 pennies that are daughter material? (20 Points)
Answer:
Based upon the given information from all the questions, and based upon our answers we can assume this:
1st half-life: 50 turned to 25 coins
2nd half-life: 25 turned to 12 coins
3rd half-life: 12 turns to 6 coins
4th half-life: 6 turns to 3 coins
So, after 4 half-lives (or after 20 years) we would have 3 coins left that have parent material.
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For future reference please do not post as complex questions like this, if you do (post a question that is similar to this) please state the following information:
"All questions posted in this post relate to one-another and cannot be answered without the other questions..."
Solution A has twice as much solute as solution B is it possible for the solutions to have the same concentration
PLEASE HELP IM GIVING A LOT OF POINTS! I'm losing a rank because of this!
1.Beatrice is pushing a heavy box. She pushes with a force of 40 N. How can you determine if Beatrice is doing work?
2. Beatrice pushes the box 2 meters to the right. What formula should you use to calculate the amount of work done on the box?
3. How much work does Beatrice do pushing the box?
THANK YOU FOR YOUR TIME!
1. since Beatrice is applying force to the box, she is doing work
2. formula is work = force x displacement
3. displacement = 2 meters, force = 40 N
work = 40 x 2 = 80 Joules
Answer:
1. since she is applying force to the box, she is doing work
2. formula of work = force x displacement
3. displacement = 2 meters, force = 40 N
work = 40 x 2 = 80 Joules
Explanation:
Which conclusion is best supported by Julie’s observations?
A. The liquid is a pure substance because it is colorless.
B. The liquid is a mixture because its temperature rises.
C. The liquid is a pure substance because it remains liquid when cold.
D. The liquid is a mixture because it has a gas dissolved in a liquid.
Sediment deposited where a river flows into an ocean or lake can build up a land form is called what?
since esters are cleaved on hydrolysis, the molecular weight of the acid derived from an ester is always lower than the molecules weight of the ester. however, esters are equally liquids while carboxylic acids are usually solids. suggest reasons for this observation and explain.
Answer:
Explanation:
Esters contains a double bond between carbon atom and oxygen atom while carboxylic acid lack double bond between carbon and oxygen atom.The lack of double bond in carboxylic acid make the force of interaction between carbon and oxygen strong and particles become tightly packed which make carboxylic acid solid. The presence of double bond in esters make the force of interaction weak thus they are liquid.
A mole is equal to 6.02 x 10²³, just like a dozen is equal to 12. So if you have a mole of carbon atoms, you have 6.02 x 10²³ carbon atoms. Likewise, if you have a dozen carbon atoms, you have 12 carbon atoms. The atomic mass on the periodic table is also known as the MOLAR MASS. The molar mass is the mass of 1 mole of the element. Therefore, 1 mole of carbon has a mass 12.01g/mole. How many atoms are in 5.2 grams of carbon? Please show your work. (This is a unit conversion problem.)
The carbohydrates seen here contains 3 common elements.They are....
A) carbon,hydrogen,and oxygen
B) oxygen,nitrogen,and sulfur
C) hydrogen,oxygen,and nitrogen
D)carbon dioxide, hydrogen,and phosphorus
Give 20 points and brainliest, please answer quickly!!!
The idea that sedimentary rocks are deposited in horizontal layers unless disturbed by forces within the Earth can best be explained by which of Steno's principles?
A. principle of superposition
B. principle of horizontality
C. principle of original lateral continuity
D. principle of faunal succession
(It didn't have science so I chose chemistry as the subject :/)
The idea that sedimentary rocks are deposited in horizontal layers unless disturbed by forces within the Earth can best be explained by the principle of horizontality. Thus, the correct option for this question is B.
What do you mean by Steno's principle of horizontality?Steno's principle of horizontality may be defined as the process through which the succeeding layers of sediment and sedimentary rocks are significantly accumulated in an identical fashion in order to help geologists to understand different layers.
According to the context of this question, Steno's principles of horizontality determine the actual existence of sedimentary rocks with respect to time. Apart from this, it is also known as the law of original horizontality. It also describes the complete process of patterns in which rock layers are deposited.
Therefore, the principle of horizontality is explained by the idea that sedimentary rocks are deposited in horizontal layers unless disturbed by forces within the Earth.
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What are the similarities and differences between heat and thermal energy? Need to know for quiz tomorrow:( PLEASE HELP!!!
Final answer:
Heat is the transfer of thermal energy between objects, while thermal energy is the total kinetic energy of all particles in an object. Heat causes a change in temperature, while thermal energy affects the overall temperature of an object.
Explanation:
Differences between Heat and Thermal Energy:
1. Definition: Heat is the transfer of thermal energy from an object at a higher temperature to an object at a lower temperature. Thermal energy is the total kinetic energy of all the particles in an object.
2. Transfer: Heat can be transferred between objects, while thermal energy remains within an object.
3. Temperature Change: Heat transfer causes a change in temperature, while thermal energy affects the overall temperature of an object.
Similarities between Heat and Thermal Energy:
1. Units: Both heat and thermal energy are measured in Joules.
2. Related: Heat is a form of thermal energy and both are related to the movement of particles.
3. Conservation: Both heat and thermal energy obey the law of conservation of energy.
The products in a decomposition reaction _____.
include an element and a compound
are compounds
are elements
can be elements or compounds
Answer:
can be elements or compounds.
Explanation:
A decomposition reaction occurs when one compound origin two or more compound, or when it breaks and form its elements. For example:
2NaN₃(g) → 3N₂(g) + 2Na(s)
It was formed a compound (N₂) and an element (Na).
Complete the sentence. When a base is added to water, hydronium ions __________.
increase
decrease
stay the same
disappear
When a base is added to water, hydronium ions decrease
Explanation
When we add a base to the water, then the concentration of H⁺ ions is decrease.
What is base?According to the Arrhenius theory of acids and base, bases are those substances which gives hydroxide ions (OH⁻) to the solutions.
As we know that water (H₂O) molecules dissociates into hydronium ions (H⁺) ion and hydroxide ions (OH⁻). So when we add base in the water then this base gives hydroxide ion to the solution as a result of which concentration of OH⁻ ions increases in the solution and concentration of H⁺ ions decreases.
Hence, option (2) is correct i.e. decrease.
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