how many grams of granite at 54.1 c must be added to 467.62 of water at 21 C to make the final temp of both come out to be 29.2 C? Specific heat of granite 0.79 J/g C, specific heat of water 4.184 J/g C

Answers

Answer 1

Answer:

815.59

Explanation:

Assuming no heat lost to the Surrounding

Total heat lost by granite = Total heat gained by water

mc∆T of granite = mc∆T of water

m x 0.79 x (54.1 - 29.2) = 467.62 x 4.184 x (29.2 - 21.0)

m x 19.671 = 16043.48106

m = 16043.48106/19.671

= 815.59J


Related Questions

What is the reciprocal of cell constant?​

Answers

Explanation:

resistivity is the reciprocal of cell constant

A.
Select the correct structure that
corresponds to the name.
heptane
B.
CH3(CH2)4CH3

Answers

Answer:

Only A., the stick structure with no branches and five vertices between the two endpoints.

Explanation:

An alkane is a saturated hydrocarbon compound with no branches- just a series of carbon atoms connected with [tex]{\rm C}-{\rm C}[/tex] single bonds. Heptane is the name for an alkane with [tex]7[/tex] carbon atoms (the prefix "[tex]\verb!hept-![/tex]" means "seven".)

Notice that there are only [tex]6[/tex] carbon atoms in the alkane with the condensed structure formula [tex]{\rm CH_{3}}({\rm CH_{2})_{4}{\rm CH_{3}}[/tex]. The name for that structure would be hexane, not heptane.

In general, the condensed structure formula of an alkane with [tex]n[/tex] carbon atoms ([tex]n > 2[/tex]) is [tex]{\rm CH_{3}}({\rm CH_{2}})_{n-2} {\rm CH_{3}}[/tex]. The correct condensed structure formula for heptane ([tex]n = 7[/tex]) would be [tex]{\rm CH_{3}}({\rm CH_{2}})_{5} {\rm CH_{3}}[/tex].

The structure in choice A is represented as a line-angle formula. As long as no letter is present in the formula, each vertex in the line-angle formula (including the endpoints) represents a carbon atom. Hence, the line-angle formula in choice A would represent a hydrocarbon with [tex]7[/tex] carbon atoms.

A single line denotes a single bond between atoms. All [tex]7[/tex] carbon atoms in this structure are thus joined in a line with [tex]{\rm C}-{\rm C}[/tex] single bonds. Hence, this structure denotes an alkane with [tex]7[/tex] carbon atoms- heptane.

In CuCl2(aq), the solvent is _____.

Answers

Answer: water

Explanation:

In aqueous solutions, water is the solvent.

How many molecules of hydrogen fluoride (HF) are in (8.5x10^-2) moles of hydrogen fluoride (HF)?

Answers

Avogadro's numbers are used to convert the moles, atoms, and molecules. There are 51.17 × 10²¹ molecules in 8.5 x 10⁻² moles of HF.

What is Avogadro's number?

Avogadro's number converts the moles into molecules with the help of the value of the Avogadro's number as 6.02 x 10²³.

We know that 1 mole of HF has 6.02 x 10²³ molecules

Then, 8.5 x 10⁻² moles of HF will have:

(8.5 x 10⁻²) × 6.02 x 10²³ = 51.17 × 10²¹ molecules.

Therefore, 51.17 × 10²¹ molecules are present in 8.5 x 10⁻² moles of HF.

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Calculate the mass in grams of NaCl required to prepare 0.500 L of a 0.500 M solution.

Answers

Answer:

14.61 g NaCl

Explanation:

Molarity = moles / volume of solution (litres)

0.500 = moles / 0.500 L

moles = 0.25

Molar mass of NaCl is 58.44 g NaCl /1 mol NaCl.

0.25 moles NaCl x 58.44 g NaCl /1 mol NaCl

= 14.61 g NaCl

Which of the following is the most likely impact of clearing natural landscape to construct high-rise buildings?

Decrease in pollution
Scarcity of drinking water
Increase in animal population
Abundance of non-native plants

Answers

Answer:

the abundance of non-native plants. this MAY be right.

Explanation:

i thought it would be an increase in pollution.

Which is balanced properly

Answers

The second choice that starts with 4Fe

Answer:

The second one

Explanation:

The second one

there are   4 Fe atoms on the left and 4 on the right

                            and there are 6 O atoms on each side

                              balanced

The provided map shows the location of an earthquake under the ocean.

The data on the map would best support a prediction of which of the following events?

O A tsunami in Sri Lanka
O An earthquake in South Africa
O A hurricane in Somalia
O Flash floods in Madagascar

Answers

Answer:

Option 1

Explanation:

An underwater earthquake will most likely cause a tsunami. Sri Lanka lies very close to the source of the earthquake, hence the answer is :

A tsunami in Sri Lanka

Determine the oxidation number if each atom in the following compunds: sodium chloride and iron(||) oxide.​

Answers

Explanation:

see the picture for the answer

Which one is one pkease?

Answers

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

The Correct choice is D. Fe + S = FeS

because, in nature Iron (Fe) and Sulphur (S) are found in mono - Atomic form. so, There will be 1 Fe atom reacting with 1 S atom to form FeS (Iron sulphide)

help me with this one please.
calculate the solubility of AgCl in:
100ml of 4×10^-3M calcium nitrate
(Ksp is = 1.6 ×10^-10)

Answers

A because it gives the example of calcium nitrate

Bases contain hydroxide, which is a

Answers

Answer Sodium Hydroxide. NaOH

MgCl2(aq) + NaOH(aq) →

Answers

Explanation:

MgCl2(aq) + NaOH(aq) = Mg(OH)2(s) + NaCl. Both magnesium nitrate and sodium hydroxide solutions are colourless solutions. When they react with each other, a white precipitate (Mg(OH)2) and a colourless solution is given. Sodium chloride exists in the colourless aqueous solution.

help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

b

Explanation:

i beleave the answer is b i read it and it looks like the best option hope it helps

current is created by the movement of what subatomic particle?

Answers

Answer:

I believe the answer is electrons.

Explanation:

Protons can't move and neurons don't have a charge so it would be electrons.

Select the Coral Reef Tab. Make sure that you have clicked Return to original settings and Restart. Set the Ocean Temperature to 33 Degrees Celsius. Click Advance year 10 times. What changes do you notice?

Answers

Answer:

What changes do you notice? The white you see have undergone coral bleaching. At high temperatures, corals may lose their zooxanthellae, causing corals to lose their color and their main source of food. Once bleaching occurs, the coral colony usually dies.

Explanation:

study well

Arigato

Calculate the volume of a 1.50M HCl solution that contains 0.920 mol of HCI. (SHOW WORK)

Answers

Answer:

= 0.613dm^3

Explanation:

Data:

Molarity, M = 1.50M

no. of moles = 0.920 moles

volume=?

Solution:

as,         molarity= [tex]\frac{moles}{volume in dm^3}[/tex]

so,           volume =[tex]\frac{moles}{molarity}[/tex]

putting values:

                = [tex]\frac{0.920}{1.50}[/tex]

                 volume = 0.613dm^3

Define reaction rate.
a. An unstable arrangement of atoms that forms momentarily at the peak of the activation-energy
barrier
b. The minimum energy that colliding particles must have in order to react
c. A measure of speed of any change that occurs within an interval of time
d. Atoms, ions, and molecules can react to form products when they collide with one another,
provided that the colliding particles have enough kinetic energy.

Answers

Answer:

B

Explanation:

Answer:

B

Explanation:

Reaction rate can be defined as :

the minimum energy that colliding particles must have in order to react

C + 2H2 -> CH4
For the reaction shown here, predict the number of moles of hydrogen gas needed produce 32 grams of methane.
A) 1
B) 2
C) 4
D) 8​

Answers

Answer:

C) 4

Explanation:

The reaction :

C (s) + 2H₂ (g) ⇒ CH₄ (g)

       12g      4g             16g

Hence, based on this we can say that : 2 moles of hydrogen gas are needed to produce 16g of methane.

For 32g of methane

Number of moles of H₂ = 32/16 × 2Number of moles of H₂ = 4

According to the stoichiometry, 8 moles of hydrogen gas are needd to produce 32 g  of methane.

What is stoichiometry?

Stoichiometry  is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample. It is a quantitative study of reactants and products. Stoichiometric conversions make use of mass and moles.In the given example and according to the chemical reaction given,as 4 moles of hydrogen produce 16 g methane,∴for 32 g methane, 32×4/16=8 moles.

Thus , 8 moles of hydrogen gas are required to produce 32 g of

methane.

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he density of water is 1 g/mL.

How many times greater is the density of lead if density of lead is 11.3 g/mL?

How many times less dense is the density cork if its density is .24 g/mL?

Answers

#1

Density of lead=11.3g/L

Times greater

11.3/1=11.3times

#2

Density of cork=0.24g/mL

Times lesser

0.24/10.24times

Which statement about compounds and molecules is correct?
O All compounds are molecules.
O All molecules are compounds.
O Compounds are composed of molecules bonded together.
O Molecules are composed of compounds bonded together.

Answers

Answer: Compounds are composed of molecules bonded together.

The statement about compounds and molecules is correct is compounds are composed of molecules bonded together. Therefore, option C is correct.

What are compound ?

The term compound is defined as a substance made from two or more different elements that have been chemically attached. Water, carbon dioxide and table salt are some examples of compounds.

A compound is form when two or more atoms form a chemical bond that links them together. As we know, there are two types of bonds are present that are ionic bonds and covalent bonds.

In an ionic bond, the atoms are linked together by the electrostatic forces of the attraction between ions of opposite charge. So,compounds are composed of molecules bonded together.

Thus, option C is correct.

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A 1.5 kg rock and a 15 kg book are dropped from rest from the same
height at the same time. In the absence of air resistance, which one will
hit the ground first?

Answers

15 be use it goes and I took the test before

How many moles of sodium chloride (NaCl) are in (4.2x10^-41) molecules of sodium chloride (NaCl)?

Answers

The number of moles of sodium chloride in (4.2 x 10⁻⁴¹) molecules of sodium chloride is 6.973 × 10⁻⁶⁵

What are a number of moles?

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

1 mole is 6.022 × 10²³

[tex]1\; molecule = \dfrac{1}{6.023 \times 10^2^3}[/tex]

The given number of moles are 4.2 x 10⁻⁴¹

[tex]Moles = 4.2 \times 10^-^4^1 \times \dfrac{1}{6.023 \times 10^2^3} = 6.973 \times 10^{-65}[/tex]

Thus, the number of moles of sodium chloride in (4.2 x 10⁻⁴¹) molecules of sodium chloride is 6.973 × 10⁻⁶⁵

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4Na(s)=+O2(g)->2NA2)(s)
How many grams of Na2O is produced when 57.5g an Na reacts

Answers

Huff lol sorry can’t answer

how many molecules are in 85.4 grams of Li2SO4

Answers

Answer:

85.4

Explanation:

Task
Determining Heat Gain and Loss
In this activity, you’ll heat an object in hot water and then transfer it to cool water. The object will become cooler, and the cool water will become warmer. Based on the temperature changes, you’ll calculate and compare the heat lost by the object and the heat gained by the water. To begin, choose an object (or objects) made of a known material and that can be immersed in water without causing damage.

Before you begin this task, read these lab safety guidelines. If you’re using an electronic balance, watch this video about measuring mass.

Estimated time to complete: 1 hour

If you’re using an Edmentum lab kit, remove the electronic balance and thermometer from the kit. These materials are italicized in the following equipment list. Then gather any additional items shown in the list. If you’re not using an Edmentum lab kit, alternatives are suggested in parentheses. If you don't have these alternative materials at home, please check with your teacher for help.

You’ll need these materials:

electronic balance (may also use a kitchen scale, readable at least to the nearest gram)
thermometer, readable at least to the nearest degree from 0°C to 100°C (32°F to 212°F)—readings to the nearest tenth of a degree will produce better results
foam cups (2)
lids to fit the cups (may use squares of cardboard as lids)
solid object (or group of objects) of a known material that can fit easily in the cup, ideally having a total mass of 25 to 60 grams; here are some ideas:
2–5 plastic dominoes, depending on size
5–10 glass marbles, depending on size
10 quarters
tongs
pen or marker
stove, hot plate, or microwave oven
container for heating water (depends on the selected heat source)
Part A
Begin the task by performing these steps. Record your observations in the table provided.

Label the foam cups with the numbers 1 and 2.
Record the type (and quantity, if applicable) of object you will be using. Include what kind of material the object is made of.
Determine the specific heat capacity of the chosen object from this list of specific heat capacities. If you can’t locate your material on the list, do an online search.
Use the electronic balance to measure the mass of the chosen object(s). Record the mass. Then, place the object(s) into cup 1.

Answers

Answer:

The water warms to a temperature of 28.1°C. Determine the specific heat capacity of the zinc. Now this 229.9 J is equal to the -Qmetal. The specific heat capacity of the metal can be calculated by setting -229.9 J equal to m•C•ΔT.

...

Heat and Changes of State.

Explanation:

Helium gas occupies a volume of
12.5 Lat -45 degrees Celsius. What
volume will it occupy at 15 degrees
Celsius?

Answers

Answer:

15.79 L

Explanation:

V1 /T1  = V2/T2

Re-arrange to:

V1/T1 * T2  = V2       Note that T must be in units K

12.5/ ( -45 + 273.15)  *  ( 15 + 273.15)   = 15.79 L

a. List six renewable resources that humans depend on. (0.5 point)​

Answers

Answer:

-trees

-solar energy

-hydroelectricity

-wind energy

sorry I can only think or 4 atm

Complete the chemical equations and balance them
HCl + KOH → __________ + ____________
H₃PO₄ + NaOH→__________ + ____________
H₂CO₃+ Ca(OH)₂→__________ + ____________

Answers

Answer:

KCl+H2O

Na3PO+H2O

CaCO3+H2O

# 12 of Equilibrium Constant
Consider the chemical system:
2 NO(g)
N₂(g) + O₂ (g)
K = 2.1 x 1030
How do the equilibrium concentrations of the reactant compare to the equilibrium concentration of the products?
Select one:
O a. They are much lower
O b. They are much higher
O c.
They are about the same order of magnitude
O d. They have to be exactly equal
e.
You can't tell from the information given

Answers

Answer:

of Equilibrium Constant

Consider the chemical system:

2 NO(g)

N₂(g) + O₂ (g)

K = 2.1 x 1030

How do the equilibrium concentrations of the reactant compare to the equilibrium concentration of the products?

Select one:

O a. They are much lower

O b. They are much higher

O c.

They are about the same order of magnitude

O d. They have to be exactly equal

e.

You can't tell from the information

Explanation:

of Equilibrium Constant

Consider the chemical system:

2 NO(g)

N₂(g) + O₂ (g)

K = 2.1 x 1030

How do the equilibrium concentrations of the reactant compare to the equilibrium concentration of the products?

Select one:

O a. They are much lower

O b. They are much higher

O c.

They are about the same order of magnitude

O d. They have to be exactly equal

e.

You can't tell from the information

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