Worth many points (timed test)

A 54.2 g sample of an unknown metal is heated to 48.00 degrees Celsius.

It is then placed in a coffee-cup calorimeter filled with water.

The calorimeter and the water have a combined mass of 183.1 g and an overall specific heat of 1.34 cal/g•°C.

The initial temperature is 10.2°C when the metal is added.
The system reaches a final temperature of 23.00 °C.

(show work)

Answers

Answer 1

Answer:

2.335 J/g*degrees celcius

Explanation:

Worth Many Points (timed Test)A 54.2 G Sample Of An Unknown Metal Is Heated To 48.00 Degrees Celsius.It

Related Questions

How many grams of water should be added to 4.00 g NaOH to create 2.00% by mass NaOH solution?

Answers

Answer:

196 grams

because ^^^ was wrong and person in comments said it was 196 and it was right

When NaOH of 4.00 g is being added with water, the mass of water required to create 2.00% of NaOH solution by mass is 196 g.

What is mass percent of solute?

It means that the particular amount of solute in terms of percentage is present in the solute.

Given the mass of the solute, NaOH is 4.00g

Suppose the mass of water required to add is x in g.

The mass percent of the solute is

[tex]\dfrac{2}{100} =\dfrac{4.00}{4.00 +x }[/tex]

x =196 g

Therefore, mass of water required to create 2.00% of NaOH solution by mass is 196 g.

Learn more about Mass percent of solute.

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Find the net force on a rope which is being pulled by 2 groups of
students. The blue team is pulling with a force of 1500 N to the west and
the orange team is pulling with a force of 1300 N to the east.

Answers

Answer:

200 N to the west b/c we have 1500 to west and

1300 N to east . the forces have a opposite direction.

thus we add the force. and we gain 200N force.

How many grams are found from 2 moles of glucose C6H1206?

Answers

Answer:

360g

Explanation:

Hope it helps you!

Based on the chemical reaction below, if you produce 109.34 moles of Na, how

many g of Cl2 were produced? 2NaCl (s) -> 2Na(s) + Cl2(g) *

Answers

Answer: 3881 g of [tex]Cl_2[/tex] will be produced along with 109.34 moles of Na

Explanation:

The balanced chemical equation is:

[tex]2NaCl(s)\rightarrow 2Na(s)+Cl_2(g)[/tex]  

According to stoichiometry :

2 moles of [tex]Na[/tex] are produced along with = 1 mole of [tex]Cl_2[/tex]

Thus 109.34 moles of [tex]Na[/tex] will produced along with=[tex]\frac{1}{2}\times 109.34=54.67moles[/tex]  of [tex]Cl_2[/tex]

Mass of [tex]Cl_2=moles\times {\text {Molar mass}}=54.67moles\times 71g/mol=3881g[/tex]

Thus 3881 g of [tex]Cl_2[/tex] will be produced along with 109.34 moles of Na

how many moles of NaOH are produced from 1.20 moles of Na2O?​

Answers

If we begin the problem with 120. grams of
N
a
2
O
and we are trying to find the mass of
N
a
O
H
that can be produced, this is a gams to grams

g
r
a
m
s

m
o
l
s

m
o
l
s

g
r
a
m
s
120
.
g
N
a
2
O
x
1
m
o
l
N
a
2
O
62
.
g
N
a
2
O
x
2
m
o
l
N
a
O
H
1
m
o
l
N
a
2
O
x
40
.
g
N
a
O
H
1
m
o
l
N
a
O
H
=
the gfm of
N
a
2
O
is (2 x 23 + 1 x 16 = 62)
the gfm of
N
a
O
H
is (1 x 23 + 1 x 16 + 1 x 1 = 40)
The mole ratio from the balanced chemical equation is 2 moles of
N
a
O
H
for every mole mole of
N
a
2
O
.

According to the stoichiometry of the mentioned chemical reaction,2.40 moles of NaOH are produced from 1.20 moles of Na₂O.

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 used in balancing chemical equations for the law of conservation of mass to be implemented.

According to the reaction, as 1 mole  of sodium oxide produces 2 moles of NaOH , therefore 1.20 moles of sodium oxide will produce 1.20×2/1=2.40 moles of sodium hydroxide.

Thus, 2.40 moles of NaOH are produced from 1.20 moles of Na₂O.

Learn more about stoichiometry,here:

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Organisms are classified into different kingdoms based on?...

Answers

Answer:

Food and cell type

Explanation:

Kingdoms are by far the most basic legal structure for living objects. Living objects are classified into realms depending on how they consume food, the kinds of cells that produce their bodies, and the total type of tissue in their bodies.

help please don’t understand

Answers

hello sister the answer is very easy it is 2 miles of oxygen

How many grams of sodium metal must be introduced to water to produce 3.3 grams of hydrogen gas?

Answers

Answer:

The mass of sodium metal that must be introduced to water to produce 3.3 grams of hydrogen gas, H₂, is approximately 18.82 grams of sodium metal

Explanation:

The given mass of hydrogen gas produced = 3.3 grams

The molar mass of hydrogen gas, H₂ = 2.016 g/mol

The number of moles of hydrogen gas in 3.3 grams of H₂, 'n', is given as follows;

n = Mass/(Molar mass)

n = 3.3 g/(2.016 g/mol) = 1.63690476 moles of H₂

The reaction of sodium and water can be written as follows;

2Na + 2H₂O → 2NaOH + H₂ (g)

2 moles of sodium produces 1 mole of hydrogen gas, H₂

Therefore;

1.63690476/2 moles of sodium will produce 1.63690476 moles of hydrogen gas, H₂

The molar mass of sodium, Na ≈ 22.989 g/mol

The mass of 1.63690476/2 moles of sodium, 'm', is given as follows;

m = 1.63690476/2 moles × 22.989 g/mol ≈ 18.8154018 grams ≈ 18.82 grams

The mass of sodium that will produce 3.3 grams of hydrogen, m ≈ 18.82 grams of sodium metal.

explain what is the difference between bohr and rutherford atomic models

Answers

Answer:

The Rutherford Model shows an atom with electrons orbiting a fixed, positively charged nucleus in set, predictable paths. The Bohr model shows electrons travel in defined circular orbits around the nucleus.

2Ag (s) + H2S(s) → Ag2S(s) + H2(g)


Oxidation Half-Reaction:


Reduction Half-Reaction:

Answers

Answer: Oxidation half: [tex]2Ag\rightarrow 2Ag^++2e^-[/tex]

Reduction half: [tex]2H^++2e^-\rightarrow H_2[/tex]

Explanation:

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

[tex]2Ag(s)+H_2S(s)\rightarrow Ag_2S(s)+H_2(g)[/tex]

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

Oxidation half: [tex]2Ag\rightarrow 2Ag^++2e^-[/tex]

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

Reduction half: [tex]2H^++2e^-\rightarrow H_2[/tex]

Convert 75k to oC
(I’ll mark you as brainlister)

Answers

Answer:

-198.15 degrees Celsius

Explanation:

To convert to Celsius from Kelvin, subtract 273.15 from your temperature in Kelvin.

75K - 273.14 = 198 degrees C

2. This chart describes several characteristics of human civilizations.
(6.04)
Characteristics of Human Civilizations
Stable Food Supply
?
Developed Systems of Writing
Which phrase best completes this list?
A. Created militaries
B. Complex social structures
C. Use of fire for protection
D. Declining population

Answers

The answer would be: B

Identify at least four limiting factors in the local ecosystem and their impact on native populations.

Answers

4 limiting factors could be water, space, pollution, and access to mates, could all be factors in limiting the native population. Water, could be affected by pollution, and this would remove water, which means that no living things would be able to survive, or at the best be hindered in its growth. Space could be removed by deforestation, or simple water rising, and this could kill off the population, thus removing mates for the population. (hope this helped, if it did, please consider marking brainiest)

The availability of food, water, shelter and diseases are the four limiting factors in the local ecosystem and their impact on native populations.

What are the limiting factors?

The limiting factors such as availability of food, water, shelter and diseases can change animal and plant populations because these factors has a direct impact on the organisms and the organisms is depend on these factors for their survival.

So we can conclude that availability of food, water, shelter and diseases are the four limiting factors in the local ecosystem and their impact on native populations.

Learn more about population here: https://brainly.com/question/25630111

Explain the electrolysis of acidified water​

Answers

Answer:

yqaeh

Explanation:

Electrolysis of acidified water

Water is a poor conductor of electricity, but it does contain some hydrogen ions , H +, and hydroxide ions, OH -. These ions are formed when a small proportion of water molecules naturally dissociate . ... H + ions are attracted to the cathode , gain electrons and form hydrogen gas.

4A1 + 302 →
2Al2O3. How many grams of oxygen (O2)
are needed to produce 95 grams of
aluminum oxide (Al2O3)?

Answers

Answer: 44.706g Al2O3

Explanation:

4A1 + 302 → 2Al2O3

3×(16×2) 2{(27×2)+(16×3)}

= 96 = 204

So

To produce 204g of Al2O3,We need . 96g of O2

To produce 1g of Al2O3,We need

. (96÷204)= 0.47g of O2

To produce 95g of Al2O3,We need

. (0.47×95)= 44.706g of O2

.

So, 44.706 grams of oxygen (O2)

are needed to produce 95 grams of

aluminum oxide (Al2O3).

Which of the following would be a value measured using a scale in lab?
O Actual yield
O Percent yield
O Theoretical yield
O Molar ratio

Answers

Answer:

A. Actual Yield

Since all of the others are calculated not measured outright.

This equation is balanced.
C + S8 -4CS2

True
False

Answers

False.....................

I think the answer would be false because there’s no = to even begin with

1 point

1. A balloon has 1.55 L of air in it exerting a pressure of 105.2 kPa. At

constant temperature, if the pressure increases to 122.0 kPa, what is the

volume?

Answers

Answer:

[tex]V_2=1.34L[/tex]

Explanation:

Hello there!

In this case, since this problem is describing how pressure changes as a function of volume and vice versa, it is possible recall the Boyle's law as shown below:

[tex]P_1V_1=P_2V_2[/tex]

Whereas we are asked to compute the volume when the change is pressure is performed (V₂); thus, we proceed as follows:

[tex]V_2=\frac{P_1V_1}{P_2}\\\\V_2=\frac{1.55L*105.2kPa}{122.0kPa}\\\\V_2=1.34L[/tex]

Best regards!

CAN SOMEONE HELP ME WITH AS MANY AS POSSIBLE! I WILL GIVE MORE POINTS IF GIVEN ALOT

Answers

Answer:

1.Hydrogen peroxide,2.Potassium nitrate,3.Ethane,4.Ammonium phosphate,5.Aluminium sulfate,6.Barium hydroxide,7.Calcium phosphate,8.Calcium chloride,9.Copper nitrite,10.Iron oxide,11.Sulfuric acid,12.Phosphoric acid,13.Mercury chloride,14.Potassium sulfite,15.Potassium manganate,16.Magnesium acetate,17.Magnesium nitrate,18.Sodium chloride,19.Sodium acetate,20.Ammonium bromide

Question is on the image

Answers

Answer:

It has direction and size.

Explanation:

The way I learned it was that vectors have direction and Magnitude. Magnitude is just the length of the vector. So you are right.

Dipole-dipole interactions are (weaker than, stronger than, equal to) hydrogen bonds.

Answers

Answer and Explanation:

Dipole-Dipole interactions are weaker than hydrogen bonds.

Hydrogen bonds are a form of dipole-dipole interactions, being the strongest form of dipole-dipole interactions.

#teamtrees #PAW (Plant And Water)

Excessive use of chemical fertilizer cause chemical pollution.How?

Answers

Explanation:

Chemical fertilizers raise crop yields, but their heavy usage has hardened the soil, diminished fertility, reinforced pesticides, contaminated air and water, and emitted greenhouse gases, posing health and environmental risks.

True or False: Ionic bonding means atoms COMPLETELY GIVE AWAY OR TAKE their electrons from each other. *

Answers

Answer: The given statement is True.

Explanation:

An ionic bond is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element and the element which accepts the electrons is known as electronegative element. This bond is formed between a metal and an non-metal.

A covalent bond is formed when an element shares its valence electron with another element. This bond is formed between two non metals.

Thus the given statement is True.

Which states of matter change shape when moved? Which states of matter change shape when moved?

Answers

Answer:

Gas and Liquids

Explanation:

Oo help it’s for a grade

Answers

Answer: D.kinectic energy

Explanation

Shauna is looking over her family history for heart disease and thought about the easiest way to represent what she discovered. What model is used to show the pattern of traits that are passed from one generation to the next in a family?
dichotomous key

pedigree chart

line graph

punnett square

Answers

Then answer is Punnet Square

15. _____ is the breakdown of rocks into smaller particles by natural processes.
A. Deposition
B. Weathering
C. Erosion

Answers

Answer:

B

Explanation:

Weathering is the physical and chemical breakdown of rock at the earth's surface. ... The physical breakdown of rock involves breaking rock down into smaller pieces through mechanical weathering processes. These processes include abrasion, frost wedging, pressure release (unloading), and organic activity.

In an ionic bond, which
category of elements are giving away
electrons?

Answers

Ionic bonds form only between metals and nonmetals. That's because metals “want” to give up electrons, and nonmetals “want” to gain electrons. It takes energy to remove valence electrons from an atom and form a positive ion

Answer:

Ionic bonds form only between metals and nonmetals. That's because metals “want” to give up electrons, and nonmetals “want” to gain electrons. It takes energy to remove valence electrons from an atom and form a positive ion. Energy is released when an atom gains valence electrons and forms a negative ion.

hope it is helpful u in understandingplz mrk it as brainliest.

Organisms that get energy by eating dead organisms are called *

scavengers
omnivores
herbivores
decomposers

Answers

Answer:

The Answer is A. Scavengers

How many grams of Li are present in 3.4x1026 atoms of Li?

Answers

Answer:

1.0534×10²⁷ grams

Explanation:

multiplying the number of atoms with Avogadro's constant.

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