45.8 grams of copper requires 1172 J of heat to reach a final temperature of 100.5 ℃. What was the initial temperature? Specific heat of copper is 0.385 J/g℃.
A. 66.5[?][?][?]
B. 122[?][?][?]
C. 34.0[?][?][?]
D. 75.2[?][?][?]

I also have no idea what the [?][?][?] is. Can someone please help me for 20 points? I desperately need help. No nonsense answers either, and show the steps pls. :')

Answers

Answer 1

Answer:

Option A, 66.5

Explanation:

use q (heat) = m(mass) * cp(specific heat) * deltat (change in temp)

q= 1172, m = 45.8, cp = 0.385

1172= (45.8) * (0.385) * Delta T

1172= 17.633 *DeltaT

1172/17.633 =DeltaT

66.5 =DeltaT


Related Questions

Use the periodic table to answer the questions below.
Which diagram shows the correct electron
configuration for nitrogen (N)?
N N N1
1s
2s
2p
NN ILL
1s 2s
2p
N N
1s
2s
DONE✔
2p

Answers

The diagram that show the correct electron configuration is the second option. ⬆⬇1s,  ⬆⬇2s, ⬆⬆⬆2p.

What is electronic configuration?

The electronic configuration is the representation of electron present indifferent energy levels is an atom. The different type of orbitals are s, p, d, and f.

Thus, the correct option is 2, ⬆⬇1s,  ⬆⬇2s, ⬆⬆⬆2p.

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What does viscosity describe

Answers

The Answer Is The Third Option

Write the half reaction equations at the cathode and anode

Answers

A redox reaction is one in which oxidation and reduction occurs.

What is a redox reaction?

A redox reaction is one in which oxidation and reduction occurs. Oxidation involves electron loss while reduction involves electron gain.

For the compound NaI;

The oxidation half equation is - 2Na(s)  --->2Na^+(aq) + 2e

The reduction half equation is - I2 + 2e ---->2 I^-(aq)

Missing parts:

Write the anode half-reaction and cathode half-reaction for NaI.

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which of these changes are endothermic and which are exothermic

baking a cake
bending a plastic ruler
cutting paper
melting ice cream
ripening of fruit
souring of milk

Answers

Answer:

exothermic - bending a plastic ruler , cutting paper, melting ice cream, ripening of fruit, souring of milk.

Explanation:

endothermic- baking of cake .

Exothermic is all of them besides baking a cake that’s endothermic

Which statement best describes how changing the temperature of a solution
affects the rate of reaction?
A. Increasing the temperature of a solution increases the
concentration of the reactants.
B. Decreasing the temperature of a solution increases the rate of
reaction.
C. Increasing the temperature of a solution increases the rate of
reaction.
D. Decreasing the temperature of a solution increases the
concentration of the reactants.

Answers

C. increasing the temperature of a solution increases the rate of reaction.

This is because increasing the temperature gives particles more kinetic energy, thus resulting in more effective collisions.

can see all wavelengths/photons of light emitted from excited electrons.

Answers

No, all wavelengths/photons of light are emitted from excited electrons.

What is wavelength?

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.

When an atom's electrons move to a lower energy state, the atom releases energy in the form of a photon. Depending on the energy involved in the emission process, this photon may or may not occur in the visible range of the electromagnetic spectrum.

Hence, no, all wavelengths/photons of light are emitted from excited electrons.

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Discuss how varying ph of water affects the soil ph which in turn would affect the durability properties of reinforced concrete as a constituent material?

Answers

Although soils are capable of resisting pH changes, there are some circumstances where the pH of the water can result in alterations.

Will Soil pH Be Affected by Water pH?

The texture of soil affects how susceptible it is to the pH of the surrounding water. Smaller soil particles, such as clays and clay loams, have a greater impact than larger, sandier soils. There are more colloids, which are extremely minute particles, in fine-textured soils. Positively charged ions are maintained at these colloids. The cation exchange capacity of a soil refers to its capacity to hold onto these ions. Ions on the colloidal particles trade places with ions in the soil solution. The pH of the soil is less affected by negative ions in the soil solution.

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How many moles of CF4 can be produced when 8.95 mol C reacts with 7.88 mol F2?
How many moles of each reactant are left over? (Note that at least one of the reactants must disappear.)
C remaining
mol
F2 remaining
mol

Answers

The remaining moles of C is 5.01 moles while the remaining moles of F₂ is 0.

Reaction between Carbon and Fluorine

The reaction between carbon and Fluorine is given as;

C + 2F₂  -------> CF₄

1  :    2                1

from the reaction above,

2 moles of F₂ requires 1 mole of C

7.88 mole of  F₂ will require:    7.88/2 = 3.94 moles of C and 3.94 moles of CF₄.

The remaining moles of C = 8.95 - 3.94 = 5.01 moles while the remaining moles of F₂ is 0.

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which type of scientist would most likely study how the size of the lemming population affects the size of the snowy owl population?
A. A biologist
B. A sociologist
C. A chemist
D. A physicist
HELP PLS

Answers

The type of scientist would most likely study how the size of the lemming population affects the size of the snowy owl population is a biologist.Thus, the correct option is (D)

What Biologist does ?

Biologists study humans, plants, animals, and the environments in which they live.

They may conduct their studies--human medical research, plant research, animal research, environmental system research--at the cellular level or the ecosystem level or anywhere in between.

Hence, The type of scientist would most likely study how the size of the lemming population affects the size of the snowy owl population is a biologist.Thus, the correct option is (D)

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A box has dimensions of 2.5 cm by 3.0 cm by 4.0 cm. The volume of the box in milliliters and liters is Group of answer choices 3,000 mL and 3.0 L 30 mL and 30,000 L 7.5 mL and 7,500 L 30 mL and 0.030 L 7.5 mL and 0.0075 L

Answers

Considering the definition of volume, the volume of the box is 30 mL or 0.03 L.

What is volume

Volume is a metric magnitude that is defined as the extension in three dimensions of a region of space. In other words, it is defined as the amount of space occupied by the object or figure in three-dimensional space. Volume is measured in cubic units.

Volume can be considered as the capacity of a container to hold a quantity of fluid (gas or liquid).

Volume of a box

A box is a rectangular prism, which is defined as a prism with rectangular bases and rectangular lateral faces.

The volume of this prism depends on its three dimensions and is calculated as the multiplication of these dimensions:

Volume= Dimension 1× Dimension 2× Dimension 3

Volume of the box in this case

In this case, you know that a box has dimensions of 2.5 cm by 3.0 cm by 4.0 cm. So, the volume can be calculated as:

Volume= 2.5 cm× 3 cm× 4 cm

Solving:

Volume= 30 cm³

Being 1 cm³=  1 mL and 1 L= 1,000 mL then:

Volume= 30 cm³= 30 mL= 0.03 L

Finally, the volume of the box is 30 mL or 0.03 L.

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GIVING 17 POINTS PLS HELP ME!!!!
Which of the following statements is true about hydropower?
A. It releases carbon dioxide.
B. It can produce harmful chemicals.
C. It can affect fish and other marine life.
D. It uses gas trapped under Earth's surface.

Answers

Hydropower can affect fish and other marine life which is the true statement and is denoted as option C.

What is Hydropower?

This is the process in which water energy is converted into electrical energy through the use of dams and turbines.

When the dams are created, it blocks the path of marine activities and limits them to certain activities such as reproduction.

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What is the mass in grams of 4.85 x 10^22 Al atoms? (Report your answer to two places past the decimal

Answers

Answer:

2.17 gm Al

Explanation:

First, find the number of moles .   Then multiply by the mole weight of aluminum.

# moles =   4.85 x 10^22 / 6.022 x 10^23 = .08053 moles

.0805 moles * 26.981 gm/mole  = 2.173 gm

A+gas+at+250k+and+15atm+has+a+molar+volume+12%+less+than+the+perfect+gas+law+character. +calculate+the+compressibility+factor

Answers

The compression factor based on the information given is 0.083.

How to calculate the compression factor?

The way to calculate the compression factor goes this:

V(ideal) = RT/P

= (0.0821 × 250)/15

= 1.368

V(real) will be:

= V(ideal)/12

= 1.368/12 = 0.114

The compression factor will be:

= 1.368/(12 × 1.368)

= 0.083

Therefore, the compression factor is 0.083.

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Which of the following is a double replacement reaction?
K2S + CoCI2 -> 2KCI + CoS
Ca + 2H2O -> Ca (OH)2 + H2
CaO + H2O -> Ca(OH)2
2KCIO3 -> 2KCI + 3O2

Answers

The reaction that exemplifies a double replacement reaction is as follows: K2S + CoCI2 -> 2KCI + CoS, which is option 1.

What is a double replacement reaction?

A double replacement reaction is a type of reaction in which two elements are substituted in the reacting compounds.

In the reaction given as follows:

K2S + CoCI2 -> 2KCI + CoS

Pottasium replaces cobalt in Cobalt chlorideSulfur replaces chlorine in Cobalt chloride

Therefore, the reaction is a type of double replacement reaction.

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A graduated cylinder is filled to 12.5 mL
with water and a piece of tin is placed
in the cylinder, displacing the level to
16.8 mL.
What is the volume of the tin piece in
cubic centimeters?
[?] cm³
Record your answer to the tenths place.
Volume (cm³)

Answers

The volume of the tin piece in cubic centimetres is 4.3 cm³

What is a graduated cylinder?

A graduated cylinder is a standard piece of laboratory glassware used to measure the volume of an object or amount of liquid. As its name indicates, it is a glass cylinder with marks along the side similar to those on a measuring cup.

When adding an object to a liquid, the displayed volume difference corresponds to the volume of the added object.

In this way, to find the value of the object's volume, subtract the initial volume from the final volume:

16.8ml - 12.5ml = 4.3ml

To convert to cubic centimetres, the conversion scale of volume and length measurements need to be used, finding that mL is equal to cubic centimetres. So, the final answer is:

4.3 cm³

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How many liters of a 0.80 M
solution can be made with 2.0 mol
KNO3?

Answers

Answer: 2.5

Explanation: you devide mol solute which is 2.0 and the L solution which is 0.80M, and after you divide the two you get 2.5

i also had this question <3

The molarity is an important method to calculate the concentration of a solution. The volume of potassium nitrate of 0.80 molarity and 2.0 mol moles is  2.5 L.

What is molarity?

The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. It is mainly employed in calculating the molarity of a binary solution. It is represented as 'M' and unit is mol L⁻¹.

The equation used to calculate the molarity is given as:

Molarity = Number of moles of the solute / Volume of the solution in litres

Here molarity = 0.80 M

Number of moles = 2.0 mol

Then the volume of the solution =  Number of moles of the solute / Molarity

Volume = 2.0 / 0.80 = 2.5 L

Thus the volume of the solution is 2.5 L.

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The molecular structure of water has an asymmetrical arrangement of hydrogen atoms causing.

Answers

Answer:

the asymmetrical arrangement of hydrogen atoms in a molecule of water causes the molecule to be polar, with the hydrogen atoms having a slightly positive charge, and the oxygen atom having a slightly negative charge.

Which statement best describes how the scientific community analyzes data?
OA. A scientist must always keep his or her data hidden from other
scientists.
B. There is only one possible conclusion to be drawn from a set of
data.
OC. Each scientist must use his or her own, unique data.
OD. Scientists can come to different conclusions based on the same
data.
SUBMIT

Answers

Answer: D. Scientists can come to different conclusions based on the same data.

scientists can come to different conclusions based on the same data

work out the size of resistance.​

Answers

Answer:

Step 1: Identify the resistivity (ρ) , length (L), and radius (r) of the wire. Step 2: Calculate the cross-sectional area of the wire using the formula for the area of a circle: A=πr2 A = π r 2 . Step 3: Calculate the resistance (R) of the wire using the formula for resistance: R=ρLA R = ρ L A

Arrange these elements into a table showing metals and non-metals: phosphorus, P, barium, Ba, vanadium, V. mercury, Hg, krypton, Kr, potassium, K, and uranium, U.​

Answers

...,...................................

50 atoms, 15 were isotope A, 30 were isotope B, and 5 were isotope C, which isotope would be the most abundant?

Answers

The most abundant isotope among the given Isotopes will be Isotope B

How to calculate percentage abundance of isotopes ?

To calculate the percent abundance of each isotope in a sample of an element, we usually divide the number of atoms of a particular isotope by the total number of atoms of all isotopes of that element and then multiply the result by 100.

For  Isotope A ;

% Abundance =  15/50 x 100

                        =  30 %

For  Isotope B ;

% Abundance =  30/50 x 100

                        =  60 %

For  Isotope A ;

% Abundance =  5/50 x 100

                        =  10 %

Hence, The most abundant isotope among the given Isotopes will be Isotope B.

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Does this equation show that transmutation has taken place during decay? why or why not?

61/28 ni=61/28 ni + y

a. yes, because the numbers of nucleons and atoms are conserved

b. no, because high-energy electromagnetic waves are emitted

c. no, because there is conservation of the number of atoms as well as the number of nucleons

d. yes, because nickel atoms remain nickel atoms with the same number of neutrons

Answers

The equation is not a transmutation because there is conservation of the number of atoms as well as the number of nucleons; option C.

What is transmutation?

Transmutation refers to the artificial synthesis of new elements by a nuclear reaction of the original element and nuclear particles.

In transmutation, a new element is formed and the atomic number changes.

Based on the above, it can be concluded that the given equation is not a transmutation because there is no change in atomic and nucleon number.

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An ice freezer behind a restaurant has a freon leak, releasing 31.68 g of C2H2F3Cl into the air every week. If the leak is not fixed, how many kilograms of fluorine will be released into the air over 6 months

Answers

The weight of fluorine released in to the air over 6 month will be 0.365 kg

What is Freon ?

Freon is a non-combustible gas that is used as a refrigerant in air conditioning applications.

This freon undergoes an evaporation process over and over again to help produce cool air that can be circulated throughout your AC system

Total number of weeks = 6 x 4 = 24

Mass leak rate of freon = 31.68 g/week

Mass leak rate of flourine = fluorine mass in freon / molecular mass of freon x leak rate

                                          = 19 x 3 / 118.5 x  31.68

           

                                          =  15.23 gm/week

Total fluorine leak in 6 month = 15.23 x 24 = 365.72 gm = 0.365 kg

Hence, The weight of fluorine released in to the air over 6 month will be 0.365 kg

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Scientists used alpha particles to investigate models of the atom. Figure 4 shows an alpha particle scattering experiment.

Explain how scientists used the results from the experiment to :

disprove the plum pudding model
give evidence for the new nuclear model​

Answers

Answer:

See attached image.

Explanation:

How many liters of a 0.80 M
solution can be made with 2.0 mol
KNO3?
{?} L

Answers

Answer:

Explanation:

Solution

Verified by Toppr

2 molL

−1

Explanation :

Concentration =

Volume of solution

Moles of solute

We assume that potassium nitrate dissolves in the given volume of solvent without gross change in volume.

Concentration =

101.10gmol

−1

404g

Which would be a good use for an organic substance? Check all that apply. A. Electrical conductors B. Waterproof coatings C. Fuels such as gasoline D. Microchips E. Plastic storage containers

Answers

Answer:

B. waterproof coating

Explanation:

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How do you test for hydrogen?

Answers

To test for hydrogen, burn a candle near the suspected source of hydrogen. If you hear a squeaky pop sound, hydrogen is present because when hydrogen gas burns, it makes a squeaky pop sound.

Hydrogen burns with a loud pop in when a burning splint is held near it.

Test for hydrogen

There are a couple of ways to test for hydrogen. However, the simplest and most popular way is to bring a burning splint near a container containing hydrogen gas.

The production of a loud squeaky pop sound indicates the presence of hydrogen gas. All precautions should, however, be observed.

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How many individual Ni atoms are contained in 1.25 grams of Ni? (Input your answer with scientific notation using "e-notation" and report your answer to two places past the decimal point.

Answers

Answer:

Ni atoms are contained in 1.25gram is 1.28e22 atoms.

Explanation:

Ni atoms are contained in 1.25gram is 1.28e22 atoms.

We have a Nickel(Ni)  atom . The atomic number of Ni is 28 .It is a silvery-white metal with a slight golden tinge. Ni belongs to the transitional metal series.

The electronic configuration of Ni = Ar4d⁸35²

Nickel is slowly oxidized by air at room temperature.

Nickel is a ferromagnetic element at approximately room temperature.

To answer the problem , we first need to divide by the molar mass of Ni to get the moles of Ni. And then we will multiply by Avogadro's number to find the number of Ni atoms.

Molar mass of Ni = 58.7gm

Given mass of Ni = 1.25gm

Avogadro’s No. = 6.022 × 10²³ atom/mole

                    Moles of Ni = Given mass/Molecular mass

                                          = 1.25/58.7 = 0.0213

                    Moles of Ni = 0.0213

Now ,

       Number of Ni atom = Avogadro’s number × Moles

So that,

                No. of Ni atom = 6.022 × 10²³× 0.0213

                                            = 0.128 ×10²³  atoms

                                           = 1.28 × 10²² atoms

                                           = 1.28e22

So there are 1.28 × 10²² individual Ni atoms are contained in 1.25 grams of Ni.

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Please answer one question. thanks so much if u do
What is the substance produced by a chemical reaction called?
a) Reactant
b) Product
c) Resultant
d) Reagent
e) Summation

What kind of chemical reaction involves oxygen and another substance producing water and carbon dioxide?
a) Synthesis reaction
b) Decomposition reaction
c) Combustion
d) Single displacement
e) Photochemical reaction

What does a catalyst do to a chemical reaction?
a) Stops the reaction
b) Starts the reaction
c) Speeds up the rate of reaction
d) Slows down the rate of reaction
e) None of the Above

Answers

Answer:

b) Product

c) Combustion

c) speeds up the rate of reaction

Explanation:

the substance produced by a chemical reaction is called a product (b)

Combustion (c) reactions are involving oxygen and "another substance" [and hydrocarbons] to produce carbon dioxide and water.

A catalyst acts to speed up the rate of a reaction (c)

 > note how it "speeds up" reaction: , it [a catalyst] lowers the pressure or temperature needed to start one--but it isn't used/consumed in the reaction

So, the answers are: b, c, c

hope this helps!!

The answer is b product

For the function F(x) = 1, which of these could be a value of F(x) when x is
close to zero?

Answers

Answer:

A.  -10,000

Explanation:

When x approaches zero, the graph tells us that F(x) either becomes extremely large or extremely small.  The best answer is therefore A:  -10,000.  Best, because we aren't given the exact value of x, but clearly the other results require that x be greater than 1 or less than -1, which is far from zero.

Other Questions
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What steps will help show that circle A is similar to circle B?O Translate circle A using the rule (x+4y+3)O Rotate circle A 45" about the centerO Dilate circle A by a scale factor of 4O Reflect circle A about the origin Company Q incurred manufacturing costs for the year as follows: Direct materials Sh 10/unit Direct labour sh 7/unit Manufacturing overheads: Variable sh 3/unit Fixed Sh 7,500 Variable selling and administrative expenses sh 2,000 Fixed selling and administrative expenses sh 4,000The company produced 1,500 units (the normal level of production) and sold 1,000 units at Sh 45 per unit. Assume that the production manager is paid a 15 per cent bonus based on the companys net income.Required:(a) Prepare an income statement under absorption costing. Given that the slope is 4 and (4, 6) is on the line. 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(They all look at the rocker.)What would be one advantage of watching this scene as opposed to reading it?O The audience would not have to infer the characters' moods, which could make the characters seem more genuine.The audience would actually see what the characters look like, which could alleviate unnecessary mystery.The audience would not have to interpret the setting, which could make the conflict of the story more evident.The audience would actually watch all of the characters turn to stare at the rocker, which could enhance the mood ofthe scene. One of the widely acknowledged problems with using the consumer price index as a measure of the cost of living is that the CPI a. accounts only for consumer spending on food, clothing, and energy. b. fails to account for consumer spending on housing. c. fails to account for the introduction of new goods. d. fails to account for the fact that consumers spend larger percentages of their incomes on some goods and smaller percentages of their incomes on other goods. Does anyone know the answer to all this? Which is part of the executive branch of the Mississippi state government?A. chancery courtsB. department of correctionsC. house of representativesD. supreme courtplease answer quickly!! The sum of the series: -2+(-8) + (-32)++ (-2048) equalsI really neeed help!!! Please Im begging you!!!!!! Which sign should be used for the following equation? 0.452 _______ 0.712 < > Read the excerpt from "The Environmental Ethic."It is fashionable in some quarters to wave aside the small and obscure, the bugs and weeds, forgetting that an obscure moth from Latin America saved Australias pastureland from overgrowth by cactus, that the rosy periwinkle provided the cure for Hodgkins disease and childhood lymphocytic leukemia, that the bark of the Pacific yew offers hope for victims of ovarian and breast cancer, that a chemical from the saliva of leeches dissolves blood clots during surgery, and so on down a roster already grown long and illustrious despite the limited research addressed to it.Which of the following claims is best supported by the evidence in this excerpt?All species are worth protecting because even the small organisms contribute important functions in the environment.Every effort should be made to protect each bug and weed species regardless of its potential to cause destruction.All of the species that are now extinct or are becoming extinct could have cured a disease.Only the species that can be used for medical purposes are worth protecting from extinction. Give me an answer. How to hack somebody click 'disabled' to my office wifi? I can't use it no longer. Broker Malcolm submits his client's purchase offer, then goes on vacation. When he returns two weeks later, he learns that a counter-offer was submitted, and the response date had expired. His client's offer was terminated because he failed to respond on time. This violation is an example of ______. Oxygen diffuses from theenters red blood cells.A. Artery, plasma membraneB. Capillary, ArteryC. Alveolus, capillaryD. Plasma membrane, Alveolus