Answer:
E
Explanation:
The empirical formula has a mass of
3*C = 3*12 = 36
4*H = 4*1 = 4
1*O = 1 * 16 = 16 Add
Total = 56
The actual mass of the molecule in nature is 112
Multiplier = nature's mass / empirical formula mass
Values
Nature's mass = 112
Empirical mass = 56
Solution
Multiplier = Natures mass/Empirical Mass
Multiplier = 112 / 56
Multiplier = 2
Formula
Nature's formula = (Emperical Mass)_multiplier
Nature's formula = (C3H4O)_2 Multiply
Nature's formula = C6H8O2
Check
C6 = 6*C = 6*12 = 72
H8 = 8*H = 8*1 = 8
O2 = 2*O = 2*16 = 32 Add
Total 112 which checks with what is given.
Which pair of molecules has hydrogen bonding interactions?.
Answer:
Hydrogen bonding is a special type of dipole-dipole interaction that occurs between the lone pair of a highly electronegative atom (typically N, O, or F) and the hydrogen atom in a N–H, O–H, or F–H bond.
What is the compound Cu₂SO4 called?
Answer:
Cu2SO4 is referred to as copper sulphate
importance of scientific learning
Answer:
scientific literacy provide essential tools for surviving in the news jungle and for responsible citizenship. They also teach us to understand our own actions, to review them critically, and to take care of our rights. This is why science education is important
Explanation:
The energy that must be added to a system to break the bonds of the
reactants is known as _____?
potential energy
kinetic energy
thermal energy
activation energy
Answer:
activation energy
Explanation:
it is activation energy becauseThe activation energy for the forward reaction is the amount of
free energy that must be added to go from the energy level of the
reactants to the energy level of the transition state
How many grams of sodium hydroxide, NaOH, are needed to make 355.0 mL of a 4.75M solution? The molar mass of NaOH is 40.00 g/mol
Answer:
4198.97404999
Explanation:
In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.
Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance.
If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100.
Chemical equations must be balanced to follow the____.
law of conservation of matter
hope it helps...!!!
Select the correct answer. which characteristic is a property of water? a. densest as a solid b. low surface tension c. nonpolar molecules d. strong cohesion e. weak adhesion
The statement that is a characteristic of water is strong cohesion. Details about characteristics of water can be found below.
What are the characteristics of water?Water is a unique molecule which is attributed to its unique characteristics or features.
Water is made up of two hydrogen atoms and one oxygen atom that are chemically bonded to one another.
Some of the characteristics of water are as follows:
Water is a very polar moleculeWater is a universal solventWater has high surface tensionWater has high specific heat capacityWater is less dense as a solid than as a liquidWater has strong cohesive and adhesive propertiesWater has high boiling and freezing pointsTherefore, the statement that is a characteristic of water is strong cohesion.
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Bonds occur to make atoms more stable. Covalent bonds occur between _____
Question 41 options:
metals and noble gases because valence electrons are given to noble gases
metals and nonmetals because valence electrons are given to metals
nonmetals and nonmetals because valence electrons are shared
metals and metals because valence electrons are shared
Answer:
nonmetals and non metals because valence electrons are shared
Explanation:
please take note that ionic bond only occur between nonmetals and metals whereas covalent bonds only occur between nonmetals and nonmetals
Which functional group is found in methanol? r single bond o single bond r. single bond n h subscript 2 single bond o h. r single bond x.
The functional group found in methanol is as follows: R single bond OH (R-OH). Details about methanol can be found below.
What is functional group?A functional group is a specific grouping of elements that is specific to a class of compounds, and determines the chemical properties of that class.
Each hydrocarbon or organic compound have a specific functional group characteristics of its group.
Alcohol (OH) is the functional group of certain organic compounds like methanol, ethanol etc. Therefore, the functional group found in methanol is as follows: R single bond OH (R-OH).
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Answer:
R single bond O single bond R.
Single bond N H Subscript 2
Single bond O H.
R single bond X.
Explanation:
When would a transformation of chemical energy to electrical energy occur?
A. when the current becomes zero
B. when a reaction produces the same products
C. when electrons stop moving between atoms
D. when there is chemical reaction between metals and nonmetals
I think that the answer MAY be D..............but I don't know.
Answer:
it would occur when there are two different metals involved.
Please help me on this question
What is the formula for the compound iodine trichoride?
Answer:
The formula is CI 3 I. Hope this helps!
Answer:
ICl3.
Explanation: trust me
B. which of the reef organisms are consumers?
Answer: The primary consumers are zooplankton, corals, sponges, Atlantic blue tang, and queen conch.
Explanation:
PLEASE HELP ASAPP!!!!! WILL MARK BRAINLIEST
if 500 g of iron absorbs 22000 cal of heat, what will be the change in temperature? (specific heat of iron = 0.11 cal/gC)
Answer:
400°C
Explanation:
22,000 cal / (0.11 cal/g°C x 500 g) = 400°C
Answer:
400 C degree change
Explanation:
22 000 cal = 500 g * (C) * .11 cal / g-C
C = 22 000 / (500*.11) = 400 C degree change
which ph value is consistent with the indicator results
The color of the indicator will correspond to the pH values of either acidic or basic substances.
What are pH values and Indications?pH values are values which are obtained from taking the negative logarithm to base ten of the hydrogen ions concentration of a substance.
pH values of acidic substances are less than 7 while the pH of basic or alkaline substances are greater than 7.
An indicator is an organic dye which changes colour according to the pH of a substance.
Examples of indicators are methyl orange and phenolphthalein.
Therefore, the color of the indicator will correspond to pglh values of either acidic or basic substances.
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The original amount of a radioactive sample should be multiplied by which expression to calculate the amount of the sample that remains after n half-lives have passed? (one half) times n. (startfraction 1 over n endfraction) squared. (one half) superscript n. startfraction 1 over (2 n) endfraction.
The original amount of a radioactive sample should be multiplied by (one half) superscript n to calculate the amount remaining.
What is half-life?This is the time taken for half a substance to decay.
Description of number of half-livesThe number of half-lives a substance has undergone is related to its original amount as and amount remaining according to the following equation:
N = N₀ × (½)ⁿ
Where
N is the amount remainingN₀ is the Original amount n is the Number of half-livesFrom the above equation, we can conclude that the original amount of a radioactive sample should be multiplied by (one half) superscript n
to calculate the amount remaining.
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Answer:
c. (1/2)^n
Explanation:
Convert these temperatures to Celsius:
a. 303 K
d. 45 K
303K − 273.15 = 29.85°C
45K − 273.15 = -228.1°C
How exactly are synthetic paint brushes made? Nylon?
Answer:
Synthetic brushes are typically made from nylon bristles. Other times, they're made from plastic#CARRYONLEARNINGBY : EDLYN MORENO
Balance the following reaction:
C5H8 + _____ O2 ________ CO2. + _______ H2O
How much heat (q) will be released by water, H2O, if 34 grams of C5H8 reacts? Hint: This is a stoichiometry problem, before it’s a thermochemistry problem.
Balanced one
2C_5H_8+13O_2—»10CO_2+8H_2OMoles of Pentyne
Given mass/Molarmass34/680.5molMoles of H_2O
8/2(0.5)4(0.5)2mol1mol releases 241.8KJ
2mol releases 241.8(2)=483.6KJ
Islam's message of peace if universal, as without it there can be no happiness
A. Good
B. Applicable to all the people in the world
C. Acceptable
D. None of these
ANSWER
B po yung ans:)
What happens when a saturated solution is further heated?
Answer:
If a saturated solution is heated to a higher temperature, it becomes unsaturated. Hence, the saturation point of a solution increases with the increase in temperature as there is an increase in solubility of the solute.
Explanation:
I hope this is able to help you! Please feel free to give feedback :)
65. Write an equation for the combustion of octane.
Answer:
2C8H18+25O2→16CO2+18H2O.

Which hydrocarbon is unsaturated?
What is the name of the colony shown?
Answer:
The one that is in dark green is (New Hampshire)
if that's not what tell me i will fix it
Hope This Helped
V. What volume of nitric oxide will diffuse out of a porous partition in 10 seconds when 25 ml of methane diffuse out in 4 seconds?
The volume of nitric oxide that will diffuse out of the partition in 10 seconds when methane diffuses is 62.5 mL
What is rate of diffusion?This is defined as the amount diffused per unit time. Mathematically, it can be expressed as
Rate = volume / time
How to determine the rate of diffusion of methaneVolume of methane = 25 mLTime = 4 sRate = ?Rate = volume / time
Rate = 25 / 4
Rate = 6.25 mL/s
How to determine volume of nitric oxideTime = 10 sRate = 6.25 mL/sVolume of nitric oxide = ?Rate = volume / time
6.25 = volume of nitric oxide / 10
Cross multiply
Volume of nitric oxide = 6.25 × 10
Volume of nitric oxide = 62.5 mL
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When placed in a cloud chamber, a radioactive substance does which of the following?
a. Leaves a trail of condensed water vapor.
b. Produces an electric current.
c. lonizes chemicals on the film present in the chamber.
d. Causes a liquid to reach its boiling point.
Balanced chemical equation for the combustion of biodiesel
Answer:
carbon dioxide + water+ energy+ soot+carbon monoxide
Which of the following reactions shows a chemical change producing a solid?
2CH₂OH()+30₂(g) → 200₂(g) + 4H₂O(1) 2AgNO3(aq) + CaBr₂(aq) → 2AgBr(s) + Ca(NO3)2(aq) H₂(g) + O₂(g) → H₂O(l) NaCl(s) → NaCl(aq)
The chemical change producing a solid would be [tex]2AgNO_3(aq) + CaBr_2(aq) --- > 2AgBr(s) + Ca(NO_3)_2(aq)[/tex]
What are precipitation reactions?They are reactions involving two soluble salts with one of the products being an insoluble salt.
In the reaction below: [tex]2AgNO_3(aq) + CaBr_2(aq) --- > 2AgBr(s) + Ca(NO_3)_2(aq)[/tex]
[tex]AgNO_3[/tex] and [tex]CaBr_2[/tex] are soluble salts while [tex]AgBr[/tex] produced is an insoluble salt. The insoluble salt is a solid.
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Answer: 2AgNO3(aq)+CaBr2(aq)—>2AgBr(s)+Ca(NO3)2(aq)
Explanation:
just did on apex; 2AgNO3(aq)+CaBr2(aq)>2AgBr(s)+Ca(NO3)2(aq)
Isopropanol burns in oxygen to yield carbon dioxide, water, and heat. which word equation best represents this chemical reaction? isopropanol right arrow. carbon dioxide water heat isopropanol right arrow. carbon dioxide water oxygen isopropanol oxygen right arrow. carbon dioxide water heat isopropanol oxygen heat right arrow. carbon dioxide water
Isopropanol burns in oxygen to yield carbon dioxide, water, and heat. the word equation that best represents this chemical reaction is isopropanol oxygen ---> carbon dioxide + water + heat. Option C. This is further explained below.
What are chemical reactions?Generally, A chemical reaction is simply defined as a process that converts compounds known as reactants into distinct substances, known as products.
In conclusion, In the presence of oxygen, isopropanol burns to produce carbon dioxide, water, and heat. This chemical reaction is best represented by the word equation isopropanol oxygen= Carbon dioxide + water + heat
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Answer:
C: isopropanol + oxygen -> carbon dioxide + water + heat
Name these compounds according to IUPAC.
IUPAC is the universal nomenclature method that is used to give the names of the chemical compounds. The compounds are ethene, propionaldehyde, and propanone.
What are functional groups?Functional groups are the particular side groups that are added to the main chain to exhibit a specific property and character to the atom. In the first compound, the presence of the double bond makes it alkene, and the two carbons make the compound ethene.
The second compound has an aldehydic group with suffix -al and three carbon making it propanal, similarly, the third compound is propanone as it has ketone as the functional group and three carbon atoms in the chain.
Therefore, the compounds are ethene, propanal, and propanone.
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