Answer:
D) Heat is thermal energy that flow, and thermal energy is the part of internal energy that can be transformed.
Enthalpy of a molecule is the internal energy of a molecule. It can be due to translational motion, rotational motion, vibrionic motion or electronic motion. Therefore the correct option is option D
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Enthalpy is directly proportional to specific heat capacity of a substances
Mathematically,
Enthalpy=mass of metal× specific heat capacity of metal× Change in temperature.
Enthalpy of a reaction can be calculated by substracting the total energy of reactant from the total energy of the product
Heat is thermal energy that flows, and thermal energy is the part of internal energy that can be transferred. Energy can neither be created nor be destroyed
Therefore the correct option is option D
to know more about enthalpy, here:
https://brainly.com/question/24170335
#SPJ6
A solar panel converts
energy to
energy
A. potential, electrical
B. electrical, light
O C. light, electrical
OD. chemical, kinetic
Reset Selection
Answer: C. light, electrical
Explanation:
The solar panel contains photovoltaic cells that absorb sunlight, which it then converts to DC electricity. From DC electricity, it is converted to AC electricity, which is used in our homes to power our appliances.
Atoms are very small. Approximately how many atoms would it take to
make a stack as thick as a potato chip?
A. Thousands
B. Hundreds
C. Billions
D. Millions
Reset Selection
Answer:
Billions
Explanation:
A full stop contains almost trillion of atoms.
Billions of atoms would it take to make a stack as thick as a potato chip. Hence, option C is correct.
What are atoms?An atom consists of a central nucleus that is usually surrounded by one or more electrons.
Billions of atoms would it take to make a stack as thick as a potato chip. Hence, option C is correct.
Learn more about atoms here:
https://brainly.com/question/1566330
#SPJ2
29. Which of the following substances are soluble in water? Select all that apply.
A)Nacl
B)AgNO3
C)Agel
D)KNO
Answer:
A, B, and D
Explanation:
I'm not too sure about D, but both Nacl and AgNO3 are both definitely soluable in water
The substances that are soluble in water are NaCl, AgNO3, and KNO. The correct option are A, B, and D.
What is solubility?The maximum amount of a substance that will dissolve in a given amount of solvent at a given temperature is defined as solubility.
Solubility is a property of a specific solute-solvent combination, and the solubilities of different substances vary greatly.
The amount of an oil that will dissolve in the water column at a given temperature and pressure is referred to as its solubility in water. The more polar the compound, the more water soluble it is.
Based on the concentration at which they dissolve in a solvent, solutes are classified as highly soluble, sparingly soluble, or insoluble.
One of the critical parameters of solubility is achieving the desired drug concentration in systemic circulation for the desired (anticipated) pharmacological response.
Thus, A, B, and D are the correct options.
For more details regarding solubility, visit:
https://brainly.com/question/28170449
#SPJ2
PLEASEEEE HEELLPPPPPP!!!! Electrolysis uses electrical current to break water molecules into oxygen gas and hydrogen gas. How do you know that this is a chemical change? A)Chemical bonds in the water molecule are broken. B)There is a phase change from liquid to gas. C)Electrical current always causes a chemical change. D) It is a single replacement reaction.
Answer:
The answer is A) Chemical bonds in the water molecule are broken.
Explanation:
A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.
A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.
As we know, water is made of hydrogen and oxygen. Thus, if an electric current is applied, it breaks the compound down to its individual elements. This is a chemical change.
I hope I helped, please correct me if I'm wrong!
How many moles of nitrogen, N, are in 61.0 g of nitrous oxide, N2O?
Answer:
2.77 mol N
Explanation:
M(N2O) = 2*14 + 16 = 44 g/mol
61.0 g * 1 mol/44g = (61/44) mol N2O
N2O ---- 2N
1 mol 2 mol
(61/44) mol x mol
x = (61/44)*2/1 = 2.77 mol N
I NEED HELP ASP For the following compounds please determine the correct subscripts: OsaNb RhcCd The subscripts are a b c d
Answer:
a-1, b-2, c-1, d-1
Explanation:
Let us look at the first compound- OsN2
Since osmium is in +6 oxidation state and nitrogen is in -3 oxidation state. The valency of the species are 6 for osmium and 3 for nitrogen. They can now exchange valencies and we have Os3N6. Reducing to the lowest term we now have OsN2 as the formula of osmium nitride.
Similarly, rhodium is triply bonded to carbon to form the compound RhC in which the rhodium and carbon share six electrons. There is one sigma bond and two pi bonds between the atoms of rhodium and carbon.
ASAP need answer
When is a scientific theory formed?
Answer:when a hypothesis is given a repeated exposure to experimentation and is not falsified it increases the confidence of biologist's on that hypothesis such hypothesis form the basis of formulating further hypothesis which are then experimentally proved.The hypothesis that stand the test of time often tested and never rejected are called theory.A theory can be denied by further observations.
41. Which pair of compounds could combine to produce an ester?
I. CH3- CH2 - CH2 - CH3
II. CH3- CH2 - CH2-CH2-OH
III. CH3- CH2 - CH2-COOH
IV. CH3- CH2- CH2- COH
a. I and II
b. II and III
c. II and IV
d. III and IV
Answer: b. ii and iii
Explanation:
The ester, Butyl Butanoate is formed when Butanol reacts with Butanoic acid
as seen below;
CH3-CH2-CH2-CH2-OH + CH3-CH2-CH2-COOH ---->
Butanol Butanoic acid
CH3-CH2-CH2-COOCH2-CH2-CH2-CH3 + H2O
Butyl Butanoate Water
21. Which type of reaction is shown below?
BaCl2(aq) + K2CO3(aq) → BaCO3(s) + 2 KCl(aq)
A)Decomposition
B)Double replacement
C)Single replacement
D)Combustion
To solve such this we must know the concept of double displacement reaction. The correct option is option B that is double displacement reaction.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
In double displacement reaction the two compounds react with each other. The cations of each compound exchange their places with ne another. Ba²⁺ of BaCl[tex]_2[/tex] is displacing K⁺ ion from the compound K[tex]_2[/tex]CO[tex]_3[/tex].
Therefore the correct option is option B that is double displacement reaction.
Learn more about the chemical reactions, here:
https://brainly.com/question/3461108
#SPJ2
Describe the behavior of electrons in single, double, and triple bonds. Compare and contrast their properties, listing an example of each.
Answer:
A single bond contains two electrons between two atoms. Each bond following also contains two electrons, so a triple bond has six electrons shared in the bonding.
Explanation:
Some properties are...all foods made from meat, poultry, seafood, beans and peas, eggs, processed soy products, nuts, and seeds are considered part of the Protein Foods Group. Beans and peas are also part of the Vegetable Group. For more information on beans and peas, see Beans and Peas Are Unique Foods.
What is the change in enthalpy of the first reaction below, given the enthalpies
of the other two reactions?
2NO(g) + O2(g) + 2NO2(g)
N,(8)+ O2(g) → NO(g)
N,(8)+O2(g) + NO2(g)
AH = 90 kJ/mol
AH° = 34 kJ/mol
A. 56 kJ
B. -112 kJ
C. 124 kJ
D. -248 kJ
Answer:
The correct option is;
B. -112 kJ
Explanation:
The parameters given are;
N (g) + O₂ (g) → NO (g) ΔH = 90 kJ/mol
N (g) + O₂ (g) → NO₂ (g) ΔH = 34 kJ/mol
The required chemical reaction is given as follows;
2NO (g) + O₂ (g) → 2NO₂ (g)
Therefore, the heat of formation of 2 moles of NO = 2 × 90 = 180 kJ
The heat of formation of 2 moles of NO₂ = 2 × 34 = 68 kJ
Hence, given that the heat of formation of O₂ at room temperature = 0 kJ/mol, we have;
Change in enthalpy of the chemical reaction = Heat of formation of the products - Heat of formation of the reactants
Change in enthalpy of the chemical reaction = 68 kJ - 180 kJ = -112 kJ
Change in enthalpy of the chemical reaction = -112 kJ.
Answer:
-112
Explanation:
got it right on test
Isotopes of the same element have different _____. numbers of neutrons numbers of protons numbers of electrons atomic numbers
Answer:
number of neutrons
Explanation:
Answer:
neutrons
Explanation:
i just took the test
A sample of phosphonitrilic chloride, PNCl2, contains 0.170 mol of the compound. What is the mass of the sample, in grams?
Answer: 19.7 grams PNCl2
Explanation: To find the mass of the sample in grams, all you have to do is convert. You need to multiply 0.170 mol by the unit multiplier 115.89 grams PNC12 (molecular mass - rounded) / 1 mol PNC12. This will cancel out the moles of PNCl2, leaving you with grams as the units. Now, all you have to do is multiply. 0.170*115.89 = 19.7 grams PNCl2 (rounded, again).
What is the name of this molecule? A. 4-hexyne B. 2-hexyne C. 3-hexyne D. 1-hexyne
Answer:
3 hexyne
Explanation:
The correct name of the compound can be written by the IUPAC system as 3-hexyne.
What is IUPAC nomenclature?IUPAC is the acronymn for the international Union of Pure and Applied Chemisty. This body is responsible for devising the conventions of namiong compounds such that the name of the compound could be deduced from its structure.
In this case, the correct name of the compound can be written by the IUPAC system as 3-hexyne.
Learn more about IUPAC:https://brainly.com/question/12786977
#SPJ2
Andi performs the calculation that is shown below.
(2.06)(1.743)(1.00)
How should the answer be reported using the correct number of significant figures?
Answer: 3.59
Explanation:
(2.06)(1.743)(1.00)
2.06 × 1.743 × 1.00
= 3.59058
Two of the multiplied digits are represented in 3 significant figures. Therefore, for correct representation, the result of the product should be written to three significant figures.
3.59058 to 3 significant figures:
First three digits = 3.59
Fourth digit '0' is less than 5, and thus rounded to 0 with other succeeding digits
Therefore, (2.06)(1.743)(1.00) to 3 significant figures equals :
3.59
Answer: 3.59
Explanation:
Which statement is accurate about mass or weight?
Answer:
Mass is a scaler quantity while weight is a vector quantity
Explanation:
Hope it helps
Answer:
mass helps it
Explanation:
they can't change the mass only it can
Which of the following would have the best thermal conductor properties?
A. A thick mug
B. A plastic cup
Ос. A paper cup
D. A cup made of metal
Answer:
D
Explanation:
metal is a major cunductor of heat
A cup made of metal would have the best thermal conductor properties.
The answer is option D.
Is a metal cup a good conductor of heat?Metals have unfastened electrons that are not bounded to the atoms. those electrons are unfastened to move around within the metal, colliding with the metal atoms and shifting heat to them successfully. This makes metals higher conductors of warmth than maximum other materials.
Which of the following would have a high-quality thermal conductor?Diamond is the leading thermally conductive material and has conductivity values measured 5x better than copper, the maximum synthetic metallic inside the united states of America. Diamond atoms are composed of a simple carbon spine this is a really perfect molecular structure for an effective heat switch.
Learn more about thermal conductors here: https://brainly.com/question/18507496
#SPJ2
Most gases ______________ .
A.are dense
B.Have a definite volume
C.Have a definite shape
D.are compressible
What are the coeffients that balance the following skeletal equation?
CH4 + O2 + Cl2 ® HCI + CO
Answer:
CH4 ---> 2
CL2 ----> 4
HCL -----> 8
CO-------> 2
Explanation:
Equation
CH4 + O2 + Cl2 => HCI + CO
we have to balance it
On LHS atoms of oxygen is 2 while on RHS it is 1 atom so lets balance oxygen first
to balance oxygen on RHS we add 2 as coefficient to CO
CH4 + O2 + Cl2 => HCI + 2CO
___________________________________________________
On RHS atoms of Carbon is 2 while on RHS it is 1 atom so lets balance Carbon now
to balance Carbon on LHS we add 2 as coefficient to CH4
2CH4 + O2 + Cl2 => HCI + 2CO
___________________________________
On LHS atoms of hydrogen is 8 so lets balance hydrogen now
to balance hydrogen on RHS we add 8 as coefficient to HCL
2CH4 + O2 + Cl2 => 8HCI + 2CO
______________________________________________
On RHS atoms of Cl is 8 while on LHS atoms of Cl is 2.
To make no of atoms of Cl 8 on LHS we add 4 as coefficient
2CH4 + O2 + 4Cl2 => 8HCI + 2CO
Thus, coefficients are as given below
CH4 ---> 2
CL2 ----> 4
HCL -----> 8
CO-------> 2
The possible products of a double displacement reaction in aqueous solution are SrSO4 and NaCl. Which of these possible products will form as a solid in this reaction? Question 8 options: A) SrSO4 B) Neither compound will form as a solid C) Both compounds will form as a solid D) NaCl
Answer:
SrSO4
Explanation:
According to solubility rules, we know that the sulphates of the elements of group two are insoluble in water. The solubility rules describe what chemical species are soluble in water and what species are not soluble in water.
Generally, all chlorides are soluble in water with exception of chlorides such as silver chloride. The chlorides of group one elements are usually highly soluble in water.
Since SrSO4 is a sulphate of a group two element (strontium) it will be the insoluble solid product of the double displacement reaction described in the question.
Answer:
SrSO4
According to solubility rules, we know that the sulphates of the elements of group two are insoluble in water. The solubility rules describe what chemical species are soluble in water and what species are not soluble in water. Generally, all chlorides are soluble in water with exception of chlorides such as silver chloride. The chlorides of group one elements are usually highly soluble in water.
Read more at Answer.Ya.Guru – https://answer.ya.guru/questions/3710374-the-possible-products-of-a-double-displacement-reaction-in.html
Mixtures and Solutions
A solution is made by dissolving
9.68 g of potassium chloride
(KCI) in 565 g of water.
What is the molality of the solution?
[?] m KCI
Molarm
Answer:
[ 0.23 ] m KCl
Explanation:
Take a look at the attachment below,
565 grams = 565.1000
=0.565 kg (H20)
molar mass (Potassium Chloride),
mass of Potassium + Mass of Chloride,
39.0983 + 35.453
=74 5513 g 1 mol
Given - 968 grams (Potassium chloride)
{ (9.68 g KCI) }
(74.5513 g KCI mol)
0.565 kg H2O
( 0.23 mol / kg ) - about ,
solution =0.23 in KCI
[0.23] m KCI
Learn more about Solutions at https://brainly.com/question/24372553
#SPJ2
Which of these objects has the largest volume? A) a cube of metal with a volume of 10 cm3 B) a spherical balloon with a volume of 0.05 m3 C) a sample of water with a volume of 1,000 mm3
B. a spherical balloon with a volume of 0.05 m^3
Answer:
B.)
Explanation:
Initial temperature of metal =
С
Initial temperature of water =
°C
Final temperature of both =
Answer:
52.0 °C
Explanation:
The temperature of a sample of liquid water changes from 50°C to 30°C. Which statemen
happen at the molecular level?
The molecules move more quickly and their average kinetic energy increases
The molecules move more slowly and their average kinetic energy decreases.
The molecules move more quickly and their average kinetic energy decreases
The molecules move more slowly and their average kinetic energy increases
Answer:
The molecules move more quickly and their average kinetic energy decreases
A student touches a freshly baked cake that was taken out of the oven. Which best explains why the cake feels hot? Options: Molecules in the skin are moving faster than molecules in the cake. Molecules in the cake are moving faster than molecules in the skin. The kinetic energy of molecules in the cake is more than the energy in the baking tray. The kinetic energy of molecules in the baking tray is more than the energy in the cake.
Answer:
Molecules in the cake are moving faster than molecules in the skin.
Explanation:
When a cake is baked, the energy is absorbed. This is known as an endothermic reaction. When things are hot, it means that the molecules are in motion. When the cake is taken out from the oven, the molecules are continuously moving and absorbing energy. When the student touches the cake, the heat is flown into the student's body. This happens because of the difference in the temperature between the two.
B. Molecules in the cake are moving faster than molecules in the skin.
Find the final concentration of NO3- in a solution made by combining 0.954 L of 0.140 M Al(NO3)3 with 0.652 L of 0.430M LiNO3. A) 0.026 M B) 0.052 M C) 0.160 M D) 0.320 M E) 0.639 M
Answer:
C
By using the equation V1M1=V2M2
Which type of reaction involves the release of energy into the surroundings? Options: endothermic reactions
exothermic reactions
Answer:
exothermic reaction
Explanation:
The definition of exothermic is:
describing a process that involves the release of energy into the surroundings by substances undergoing change.
Think of ex-othermic as energy exiting/ released and en-dothermic as energy entering.
Answer: it’s endothermic
Explanation:
3. Write 6.2 x 10-3 in standard notation
Answer:
0.0062
Explanation:
6.2 x 1/10^3
= 6.2/1000
= 0.0062
Once an action plan is in place, it should not be changed.
Please select the best answer from the choices provided.
ОТ
OF
Answer:
F = False
Explanation:
An action plan is a plan that an individual or a firm creates, that contains their objectives, aims, strategies , which they require to achieve their specific goals.
An action plan is very detailed, streamlined and straight to the point. It contains a series or a number of steps or tasks that an individual must embark on in other to achieve their end goal.
WHEN AN ACTION PLAN AS BEEN PUT IN PLACE OR SET IN MOTION, IT CAN BE CHANGED OR ALTERED. This is because the aim of a action plan is to achieve the end goal of an individual or a firm. As long as the changes made in the action plan does not hinder the achievement of those goals then the action plan can be changed.
Some of the very common reasons why action plans are changed or modified includes:
a) To make the action plan more flexible.
b) To track and monitor your progress in achieving your end goal. If there is a delay, you can easily track it out on your action plan and modify it.
In other to create an action plan, it is very important that the goals of such that individual or firm is very well defined and clear from the beginning. Action plans must always be monitored, and updated regularly.
Answer:
F, false
Explanation:
i took the quiz on edge
Consider the reaction below.
Answer:
B.
Explanation:
Oxidation - losing electrons. It is Zn, and it is losing 2 electrons.
[tex]Zn^{0} --> Zn^{2+} +2e^{-}[/tex]
