How many Joules of heat would be required
completely melt 5.00 grams of H2O(s) at 0°C at to
H2O(C) at 0°C?

How Many Joules Of Heat Would Be Requiredcompletely Melt 5.00 Grams Of H2O(s) At 0C At ToH2O(C) At 0C?

Answers

Answer 1

Heat would be required  : 1,670 J

Further explanation

Given

mass of H₂O=5 g

Required

Heat to melt

Solution

The heat to change the phase can be formulated :

Q = m.Lf (melting/freezing)

Lf=latent heat of fusion

The heat of fusion for water at 0 °C : 334 J/g

Input given values in formula :

[tex]\tt Q=5\times 334=\boxed{\bold{1,670~J}}[/tex]


Related Questions

What is the formula for Na+ F-

Answers

answer
NaF
Sodium fluoride

When an element loses electrons, it forms *
Negative ions or anions
Positive ions or cations
neutral atoms or neutrons
alpha and beta particles

Answers

Answer: Positive ions or cations

Explanation:

The ions are formed when an atom gains or lose electrons.

The ions are classified into two which are called the cations and anions. The cation is classified as the positive charge formed by the loss of electrons. Example: [tex]Na^+[/tex] is formed by the loss of one electron by [tex]Na[/tex]

The anion is classified as the negative charge ion formed by the gain of electrons. Example : [tex]F^-[/tex] is formed the gain of one electron by [tex]F[/tex]

Thus when an element loses electrons, it forms positive ions or cations.

Which is immiscible with water?
Select one:
CH2
/
O a.
-CH2
HỌC-CH2
O b. H3C—CH —OH
Ос.
CH;
-CH3
Ods=C=S
e. NHI

Answers

Answer:

f

Explanation:

A 62.9 g sample of ground water is found to have a lead concentration of 13.97 ppm. Calculate the mass of lead in the sample in milligrams.

Answers

Answer:

0.879 mg

Explanation:

To solve this problem we need to use the definition of ppm:

ppm = μg solute / g solution

With the above information in mind we can calculate the micrograms of lead using the concentration (13.97 ppm) and mass of solution (62.9 g):

μg lead = 13.97 ppm * 62.9 gμg lead = 878.713 μg

Finally we convert μg to mg:

878.713 μg *  [tex]\frac{1mg}{1000ug}[/tex] = 0.879 mg of lead

What types of atoms typically form covalent bonds?

A. Metals with nonmetals, because their difference in electronegativity is above 1.7
B. Metals with nonmetals, because their difference in electronegativity is below 1.7
C. Nonmetals with nonmetals, because they're difference in electronegativity is above 1.7
D. Nonmetals with nonmetals, because of difference in electronegativity is below 1.7 ​

Answers

Answer:

D. Nonmetals with nonmetals, because of difference in electronegativity is below 1.7 ​

Explanation:

The types of atoms that typically form covalent bonds are non-metals with non-metals because of the difference in their electronegativity which is below 1.7.

In some instances, the difference can even be zero when dealing with homonuclear substances.

Covalent bond are formed between two or more atoms having low electronegativity differences between them. Each of the atoms share their valence electrons to be able to mimic the noble gases. The participating atoms will put down an unpaired electron to be used in forming a shared pair of electrons between them.

Acetylene gas is often used in welding torches because of the very high heat produced when it reacts with oxygen O2 gas, producing carbon dioxide gas and water vapor. Calculate the moles of oxygen needed to produce 1.3mol of carbon dioxide. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits.

Answers

Answer:  

3.2 moles of carbon dioxide

Explanation:

When C₂H₂ reacts with O₂ the chemical reaction is:

C₂H₂ + 5/2O₂ → 2CO₂ + H₂O

Where 1 mole of acetylene produce 2 moles of carbon dioxide.

Based on the chemical equation of this reaction, there are produced twice the moles of acetylene in moles of carbon dioxide assuming a compete reaction.

If 1.6 moles of acetylene reacts there are produced:

1.6 moles Acetylene * (2 moles Carbon Dioxide / 1 mole Acetylene) =

3.2 moles of carbon dioxide

Farmers breed cows to produce high amounts of milk. This is an example of...

A. natural selection
B. variation in species
C. selective breeding
D. inbreeding

Answers

Selective breeding? It’s about breeding and they are selecting cows to breed it

teeth to Bachile can be see more than once
Come as the chemical mantragen has the valence electrons each hydrogen has one walence electron, and chionner
Campie eles are for this went compound
.
NH H-
CI
ou

Answers

Huh I don’t understand

Which of the following is the fundamental element found in all living organisms? A-iron B-carbon C-calcium D-magnesium

Answers

Answer:

D

Explanation:

Answer:

For me

Explanation:

it's carbon because it's part of our regular respiration

write down any four uses of solution






.I will mark him\her as brilliant

Answers

Answer:

because it will help u

because it will make u to understand the question very well

When paper is burned, the mass of the remaining ash is less than the mass of the original paper. Which statement best explains this result?

A. The ash has less volume than the paper.
B. Some of the matter is destroyed during the reaction.
C. The mass of the ash cannot be accurately determined
D. Some of the products of the reaction were given off as a gas.

Answers

Answer:

d

Explanation:

According to law of conservation of mass, mass  is conserved during burning of paper although the mass of ash is less than paper as some of the products are  given out as gas.

What is law of conservation of mass?

According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.

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calculate h30+ for a 8.86*10^3 hbr solution

Answers

[H₃O⁺] = 8.86 x 10³ M

Further explanation

The dissociation of water :

H₂O(l)⇒H⁺+OH⁻

Hydrogen ions H⁺ bond with H₂O to form H₃O⁺ ions(hydronium ion)

When acid(Hbr acid) is in the presence of water(dissociates), the H⁺ ions bond with water molecules to form hydronium, the reaction :

HBr(aq)+H₂O→H₃O+(aq)+Br−(aq

So Ionization of HBr :

[tex]\tt HBr\rightarrow H_3O^++Br^-[/tex]

[HBr]= 8.86 x 10³,

From equation ratio [H₃O⁺] : HBr = 1 : 1, so

[tex]\tt [H_3O^+]=8.86\times 10^3[/tex]

The skeletal structure in line‑angle (line‑bond) mode of 2‑isopropyltoluene is shown. Identify the number of hydrogen atoms bound to each carbon atom in the structure.

Answers

Answer:

Fourteen hydrogen atoms are bounded in total to the carbon atoms in the structure

Explanation:

The boxes that show "one" indicate that there is only one hydrogen atom bonded to that particular carbon atom while those that show "zero" shows there are no hydrogen atoms bonded to that particular carbon atom. Those that show "three" indicate that there are three hydrogen atoms bonded to that particular carbon.

There are 10 carbon atoms in the structure.

NOTE that each of these carbon atoms must be surrounded with four bonds; which was how the number of hydrogen atoms (numbers in the boxes) weree determined.

Identify the element in group 15, period 3 by drawing a Lewis Dot Structure

Answers

Answer:

Phosphorus

Explanation:

Lewis Dot Structure is a structural representation of a molecule that shows valence electrons of a molecule.

The element in group 15, period 3 is Phosphorus (P). Phosphorus has an atomic number 15 and valence electrons are 5. So, the lewis structure will show 5 dots around P atom.

The temperature of a plastic cup is 70 °F. It is filled with water that is
40 °F. Which of the following describes how thermal energy is
transferred?

Answers

Answer:

From the plastic cup to the water

Explanation:

The thermal energy is transferred from the plastic cup to the water inside the cup.

This is because thermal energy moves from a body at high temperature to one at lower temperature.

Thermal energy is the energy due to the motion of the particles of a medium. An increase in thermal energy leads to a rise in the average kinetic energy of the system. It moves over a gradient usually from a body with a high temperature to one at a lower temperature.

**How many milliliters of water have to be added to 150 mL
of 0.5 M HCl to reduce the concentration to 0.10 M HCl?

Answers

Answer:

I RFID not understand the question?

what is the mass in grams of 120 liters at STP oh He gas​

Answers

The mass of He gas = 21.428 g

Further explanation

Given

120 liters of He gas​

Required

the mass in grams

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

Mol for 120 L :

[tex]\tt \dfrac{120}{22.4}=5.357~moles[/tex]

Mass of He gas(MW=4 g/mol) :

[tex]\tt mass=mol\times Ar\\\\mass=5.357\times 4=21.428~g[/tex]

3. Two people are playing tug of war. One person pulls to the right with 32 N of force. The other person pulls to the left with 37 N of force. How strong is the net force and in which direction?

Answers

The net force = -5 N

The direction : to the left(negative sign)

Further explanation

Net force : the sum of all forces acting on an object

Force is a vector quantity that has both magnitude and direction,

We agree that the move up and to the right is a positive sign, while down and to the left is a negative sign.

The direction of the force (horizontal motion) is to the right (+32 N), and to the left (-37 N), so the net force :

[tex]\tt \sum F=F~right-F~left\\\\\sum F=32-37\\\\\sum F=-5~N[/tex]

This base-catalyzed isomerization involves the following steps: 1. Deprotonation to form tetrahedral intermediate 1; 2. Collapse of the tetrahedral intermediate and bond cleavage to form enolate ion 2; 3. Proton transfer to form enolate ion 3; 4. Intramolecular aldol reaction to form tetrahedral intermediate 4. Write out the reaction on a separate sheet of paper, and then draw the structure of tetrahedral intermediate 1.

Answers

Answer:

Explanation:

The objective of this question is to show the stepwise reaction mechanism for the base-catalyzed isomerization. This mechanism is shown in the attached diagram below together with its intermediary and enolate ions.

Which two things are produced when a plant breaks down sugar to release energy

Answers

Answer:

Glucose is combined with oxygen and releases usable energy, carbon dioxide, and water. Cells can use that extra energy to power their functions. The energy isn't just floating around. It's stored in an excitable compound called ATP (adenosine triphosphate).

Explanation:

Answer: ATP(adenosine triphosohate) is released with water and carbon dioxide as byproducts.

Explanation: Remember that water, CO2,and ATP are the products of cellular respiration.

Which of the following would increase as you move from the crust to the inner core? (There is only one right answer-- highlight it.) Temperature and pressure Water level and pressure Plant life and temperature Sunlight and temperature

Answers

Answer:

Temperature and pressure

Explanation:

As you go down within the earth from the crust to the core, the temperature and pressure levels increases significantly.

The deeper one goes within the earth, the hotter and more pressurized it becomes.

The reason for this is because of the increase in the overburden on the earth surface. As we move from a zone powered by the external heat engine, we launch into a phase dominated by internal processes. The internal processes are driven by the internal heat engine. The space here is confined and heat is not readily lost. Also, the overburden rock above increases the pressure as you go deeper.


Guys please help me I have a final exam

a 20.0 l tank of co2 contains 68.0 grams of gas at 500.0 kpa of pressure what is the temperature of the tank ?

Answers

Explanation:

ok that is ans k............

The temperature of the 20 L tank containing 68 g of carbon dioxide, CO₂ at 500 KPa is 778.5 K

How to determine the mole of CO₂Mass of CO₂ = 68 gMolar mass of CO₂ = 44 g/mol Mole of CO₂ =?

Mole = mass / molar mass

Mole of CO₂ = 68 / 44

Mole of CO₂ = 1.545 moles

How to determine the temperature Volume (V) = 20 L Number of mole (n) = 1.545 moles  Pressure (P) = 500 KPa Gas constant (R) = 8.314 LKPa/Kmol Temperature (T) =?

Using the ideal gas equation, the temperature of the gas can be obtained as follow:

PV = nRT

Divide both side by nR

T = PV / nR

T = (500 × 20) / (1.545 × 8.314)

T = 778.5 K

Thus, the temperature of the tank is 778.5 K

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Carbonic acid (H2CO3) forms when carbon dioxide (CO2) dissolves in water
according to this equation:
CO2 + H2O
H2CO3
How many moles of CO2 must dissolve in excess water to produce 12 moles of
H2CO3?
Enter your answer as a number only; no units.

Answers

Answer:

12 molcules

Explanation:

distruibtive property.

what is the volume in liters at STP of 14.5 grams of CO2 gas​

Answers

Answer:

7.38 Liters

Explanation:

moles CO2 = 14.5g/44g/mol = 0.33 mole

At STP 1 mole of any gas occupies 22.4 Liters.

∴0.33 mole CO2 x 22.4 L/mol = 7.38 Liters

how many moles of CO2 are in 210 liters at STP of the compound​

Answers

Answer:

9.4 mol CO₂

General Formulas and Concepts:

Chemistry - Gas Laws

Using Dimensional AnalysisSTP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K

Explanation:

Step 1: Define

210 L CO₂ at STP

Step 2: Identify Conversions

22.4 L = 1 mol at STP

Step 3: Convert

[tex]210 \ L \ CO_2(\frac{1 \ mol \ CO_2}{22.4 \ L \ CO_2} )[/tex] = 9.375 mol CO₂

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

9.375 mol CO₂ ≈ 9.4 mol CO₂

_______join allows movement in all directions​

Answers

Explanation:

ball and socket joint.

it made of the round end of a bone fitting into a cup shaped socket in another.

example of ball and socket joint is the shoulder and hips

Which object will experience the least amount of gravitational attraction toward Earth?

a 5-gram pencil

a 40-gram eraser

a 75-gram calculator

a 380-gram cup

Answers

All objects, regardless of their mass, experience the same gravitational acceleration due to Earth's gravity (approximately 9.81 m/s^2 near the surface of the Earth).

Therefore, all objects will experience the same amount of gravitational attraction towards Earth. However, the force of gravity acting on an object is directly proportional to its mass, so a 5-gram pencil will experience the least amount of gravitational force (weight) compared to the other objects mentioned.

What is gravity?

Gravity is a fundamental force of nature that causes objects with mass to attract each other. It is one of the four fundamental forces of nature, along with electromagnetism, the strong nuclear force, and the weak nuclear force.

Gravity is responsible for the motion of objects in the universe, from the orbits of planets and moons around their parent bodies, to the formation of galaxies and the universe itself. The strength of the gravitational force between two objects depends on the mass of the objects and the distance between them. The larger the mass of the objects, the greater the gravitational force, and the closer the objects are to each other, the greater the gravitational force.

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Answer:

Pencil?

Explanation:

Doing test rn

NEED HELP ON 31,32,33..ONLY IF YOU KNOW PLEASE

Answers

Answer:

31. C

32. D

33. B

Explanation:

31. A plant cell is an eukaryotic cell i.e. it contains a membrane-bound nucleus, located CENTRALLY. The nucleus is the largest organelle in the plant cell. The cell/plasma membrane bounds the cell while the chloroplast organelle (site of photosynthesis) is also located in the plant cell. Based on this description, the image in OPTION C is correct.

32. Pottasium (K) is a highly reactive group 1 element. As stated in this question, pottasium reacts vigorously with water (H2O). This reactive property of K element is due to its valence electrons. However, elements in the same group as pottasium i.e same column on the periodic table will have the same number of valence electrons, hence, will behave chemically similar. Therefore, elements in the same column as pottasium will react the same way with water.

33. A reactant is a an element/compound in a chemical reaction that gets used up to form new products. They are usually the starting materials located on the left side of any equation. In this equation shown as:

2CuO + C → 2Cu + CO2

CuO and C are the REACTANTS while Cu and CO2 are the products.


What is the product in this reaction? What are its properties

Answers

Answer:

In a chemical reaction, substances (elements and/or compounds) called reactants are changed into other substances (compounds and/or elements) called products. You can’t change one element into another in a chemical reaction — that happens in nuclear reactions. Instead, you create a new substance with chemical reactions.

In general terms, a chemical reaction follows this format:

Reactants→Products

For example, take a look at the reaction that occurs when you light your natural gas range. Methane (natural gas) reacts with the oxygen in the atmosphere to produce carbon dioxide and water vapor. The chemical equation that represents this reaction is written like this:

Methane and oxygen (oxygen is a diatomic — two-atom — element) are the reactants, while carbon dioxide and water are the products.

Explanation:

In the given incomplete chemical reaction, the product formed are [tex]\rm CO_2[/tex] and [tex]\rm H_2O[/tex], respectively.

Product is the final result in a chemical reaction where reactants react to produce new substance.

The complete balanced reaction for the given reaction is expressed as:

[tex]\rm CH_4+2O_2\rightarrow CO_2 + 2H_2O[/tex]

In this reaction, methane undergoes combustion reaction in presence of oxygen to produce [tex]\rm CO_2[/tex] and [tex]\rm H_2O[/tex] as the final product.

Properties of the final products are:

[tex]\rm CO_2[/tex] (carbon dioxide) is a colorless, odorless gas that is denser than air. It is non-flammable, non-toxic, and does not support combustion. It is a greenhouse gas, which means that it contributes to global warming and climate change.

Water is a colorless, odorless, and tasteless liquid that is essential for life. It helps in various metabolic process taking place within human body.

Therefore, the complete and balanced equation for provide equation with final product is [tex]\rm CH_4+2O_2\rightarrow CO_2 + 2H_2O[/tex].

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The given question is incomplete. The complete question is:

What is the product in this reaction: [tex]\rm CH_4+2O_2\rightarrow[/tex]? What are its properties?

Why are K3[Cr(C2O4)3].3H2O, K2[Cu(C2O4)2].2H2O and K3[Fe(C2O4)3].3H2O coloured, whereas K3[Al(C2O4)3.3H2O is colourless? ​

Answers

Explanation:

If a body reflects only a/few color/s of the visible spectrum by absorbing remaining, it appears in that reflected color/s. In case of water, its tri-atomic (2 atoms of hydrogen and one atom of oxygen) structure does not absorb any colors from the visible spectrum of the light. ... Hence water appears colorless while others do absorb

Due to presence of paired electron in K3[Al(C2O4)3.3H2O , it will show colorless.

What is paired electron?

Paired electrons would be those in an atom which occur in pairs in an orbital, while un-paired electrons would be those in an atom that occur alone in an orbital.

Such metals were transition elements, meaning their compounds include un-paired electrons. These un-paired electrons easily create excited energy states, allowing photons to be absorbed and color to be produced.

Therefore, due to the presence of paired electrons complex will be colorless.

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