A 110. G of sample of copper (copper = 0.385 J/g·°C) is heated to 82.4°C and then placed in an insulated container of water (water = 4.18 J/g·°C) at 22.3°C. The final temperature of the water and copper is 24.9°C. What is the volume of water? (water = 1 g/mL)

Answer:

ΔT = 0.843 °C

Explanation:

Given data:

Heat added = 0.484 J

Mass of water = 0.1372 g

Temperature increase = ΔT = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Specific heat capacity of water is 4.184 j/g.°C

Now we will put the values in formula.

0.484 j = 0.1372 g × 4.184 j/g.°C× ΔT

0.484 j = 0.574j/°C× ΔT

ΔT = 0.484 j / 0.574j/°C

ΔT = 0.843 °C

Answer:

All of the above

Explanation:

Answer:

84.2 degrees

Explanation:

Olaf the snowman has an heat capacity of ice while the coffee can be

assumed to have the same heat capacity of water.

Reasons:

The heat lost by the coffee = The heat gained by Olaf...(1)

ΔQ = m₁·c₁·(T₃ - T₁) = m₂·c₂·(T₂ - T₃)

Mass of the snowman, m₁ = 38 kg

Initial temperature of the snowman, T₁ = -4.2°C

Volume of coffee, V = 15 mL = 0.000015 m³

Initial temperature of the coffee = 80.0 °C

Specific heat capacity of the snowman, c₁ = 2.097 J/(g·°C)

Specific heat capacity of the coffee, c₂ = 4.187 J/(g·°C)

Latent heat of fusion of the coffee into ice = 334 J/g

Density of the ice, ρ₂ = 997 kg/m³

Solution:

Mass of the coffee, m₂ = 0.000015 m³ × 997 kg/m³ = 0.014955 kg = 14.955 grams

Heat given to convert the coffee to ice = 334 J/g × 14.955 g = 4,994.97 J

Heat given to cool the coffee to 0°C = 14.955×4.187×80.0 = 5009.3268

Heat given to cool the coffee to 0°C = 5,009.3268 J

Heat given to reduce the temperature of the coffee turned to ice is

presented as follows;

Heat to cool frozen coffee = 14.955 × 2.108 × T₃ = 31.52514·T₃

Heat gained by Olaf = m₁·c₁·(T₃ - T₁) = 38,000× 2.097 × (T₃ - (-4.2))

Which from equation (1) gives

4,994.97 + 5009.3268 + 31.52514·T₃ = 38,000× 2.097 × (T₃ - (-4.2))

Solving with a graphing calculator, gives;

T₃ ≈ -4.08 °C

The final temperature of Olaf, T₃ ≈ -4.08 °C

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Answer:

Group 2 is the correct answer.

Explanation:

Chlorine has a charge -1. It means that X is +2 so that the formula is XCl2.

Answer:

nonmetel

Explanation:

Answer:

Its a non-metal

Explanation:

Elements that tend to gain electrons to form anions during chemical reactions are called non-metals. These are electronegative elements. They are non-lustrous, brittle and poor conductors of heat and electricity (except graphite). Non-metals can be gaseous, liquids or solids.

Answer:

5

Explanation:

d. cause it is a part of energy

Answer radio waves said the person above me wait AYO HEAR ME OUT-

Atomic weight of metal : 24

Proust states the Comparative Law that compounds are formed from elements with the same Mass Comparison so that compounds have a fixed composition of elements

Divalent metal oxide=XO

MW O = 16

MW XO₂ =  X+16

[tex]\tt \%mass=\dfrac{Ar~X}{X+16}\times 100\%\\\\0.6=\dfrac{X}{X+16}\\\\0.6(X+16)=X\\\\0.6X+9.6=X\\\\0.4X=9.6\rightarrow X=24[/tex]

Answer:

A. a rotten potato gives all of bad smell

Explanation:

B,C,D are all physical changes because we can reverse them back.we can cool the water back to make ice. if the wind passes again we can randomly get the same cloud shape in c. and in d we can make that statue again. but in A can we reverse the rotting process ? ( the enzyme reaction) no we cant because it is a chemical reaction it gives a bad smell because of the chemical changes occuring in it.

hope this helps

Answer:

The balanced equation is given below:

4Fe + 3O2 —> 2Fe2O3

Explanation:

Fe + O2 —> Fe2O3

The above equation can be balance by doing the following:

Fe + O2 —> Fe2O3

There are 2 atoms of O on the left side and 3 atoms on the right side. It can be balance by putting 3 in front of O2 and 2 in front of Fe2O3 as shown below:

Fe + 3O2 —> 2Fe2O3

There are 4 atoms of Fe on the right side and 1 atom on the left side. It can be balance by putting 4 in front of Fe as follow:

4Fe + 3O2 —> 2Fe2O3

Thus, the equation is balanced

Answer:Static electricity works because objects which are otherwise "neutral" (in other words, objects with no net charge) can be polarized. An electric field, like one caused by a nearby charged object, can cause the charges inside of a neutral object — the protons and electrons — to move around a tiny bit.

Explanation:

Ok thanks for the valuble info.

Answer:

chemichal potential

Explanation:

Answer:

Gravitational Potential

Explanation: The radius of an object is found from the center of the object to the perimeter. Radius can be any number, but it is the measurement from the center to the perimeter.

The words that complete the blanks are;

1) transverse waves

2) the ground

3) medium

We know that a wave is simply the kind of disturbance that moves along a medium and in the process there is a transfer of energy from one point to another. There are various kinds of waves and the classification of the waves is based on the amount of energy that is transferred in each case.

1) We know that in the case of the light waves, the direction of the wave is perpendicular to the motion of the particle that causes the wave as such we can all it a transverse wave.

2) We know that a wave must always involve an energy that is travelling and in this case, the energy is travelling through the land and this is the ground.

3) We know that the mechanical waves must have to move through a medium of propagation. As such, mechanical waves must move through a medium.

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Answer:

Explanation:

Ca(OH)₂ is the correct chemical  formula unit of an ionic compound.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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Answer:

A. They are nonreactive gases

Answer:

Arsenic would be more reactive.

Explanation:

Electronegativity (tendency of an atom to attract a bonding pair of electrons) increases as you move up and to the right of the periodic table.

Elements further to the right of the table have more valence electrons, meaning they are closer to creating the full ring (8 electrons) and therefore are more reactive.

Arsenic is more further up and to the right than Sodium.

Answer:

There are many ways to figuring this out: you could use a ruler, a calculator or scrap paper.

Explanation:

This is not an actual flat out answer, but it’s helpful methods to getting the answer the next time you are stuck. Hope you are having a nice day. Bless your heart and soul.

Answer:

2.7g/cm³

Explanation:

Given parameters:

Dimension of the aluminum  = 10.5cm x 10.5cm x 0.1cm

Mass of the aluminum  = 29.8g

Unknown:

Density  = ?

Solution:

Density of a substance is its mass per unit volume;

  Mathematically;

       Density  = [tex]\frac{mass}{volume}[/tex]

Volume of the aluminum  = 10.5cm x 10.5cm x 0.1cm = 11.025cm³

  So, insert the parameters and solve;

  Density  = [tex]\frac{29.8}{11.025}[/tex]   = 2.7g/cm³

Answer:

The anser is c

Roman numerals are used to indicate oxidation states. Hence, option C is correct.

An oxidation state is a number given to the atom of an element when participating in a chemical reaction.

Roman numerals are used to indicate oxidation states of transition metals.

The names for transition metal compounds often have roman numerals in them, because the roman numerals indicate the charge on the transition metal. But the oxidation state of Cu in CuO is +2, and the oxidation state of Cu in [tex]Cu_2O[/tex] is +1. Name metal first and charge and transition metal with a roman numeral.

The transition metals may form more than one ion, thus it is needed to be specified which particular ion we are talking about. This is indicated by assigning a Roman numeral after the metal. The Roman numeral denotes the charge and the oxidation state of the transition metal ion.

[tex]Fe^{2+}[/tex] would be named iron (II) and [tex]Fe^{3+}[/tex] would be named iron (III).

Hence, option C is correct.

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Answer:

4.3043x10^24

Explanation:

Atoms(H) = (3.575 mol H2S/1)(2 mol H/1mol H2S)(6.02x10^23/1molH)

Simple stoicheometry problem. Sorry for taking so long, took Chem sophomore year, its been a while

Hey there!

Molar mass of O3 = 47.9982 g/mol

therefore:

1 mole O₃ ---------------------  47.9982 g

moles O₃ ---------------------- 24 g

moles O₃ = 24 x 1 /  47.9982

moles O₃ = 24 / 47.9982

moles O₃ = 0.500 moles

Hope this helps!

N2 + 3 H2 = 2 NH3

Reaction type: synthesis

Answer:

i think the forces are the same and size and in opposite directions

Explanation:

Answer:

I think it should be

The forces are the same size and in opposite directions

Explanation:

because newtons third law is applied equal force but opposite