Answer:
Explanation:
You will need to look up the Standard Heats of Formation* for each substance and apply Hess's Law Equation.
ΔH⁰(rxn) = ∑ΔH⁰(Products) - ∑ΔH⁰(Reactants)
*Std Heats of Formation can be found in the appendix of most college chem texts.
For this problem:
Given CaCO₃(s) => CaO(s) + CO₂(g)
∑ΔH⁰: -635.1 Kj/mole -393.5Kj/mole -1206.9
ΔH⁰(rxn) = [(-393.5 Kj/mole) + (-393.5Kj/mole)] - (-1206.9Kj/mole)
= (-635.1 -393.5 + 1206.9) Kj/mole
= +178.3 Kj/mole
Answer:
656.3 kJ
This reaction is endothermic
Explanation:
edge 2020
Ammonium sulfate, an important chemical fertilizer, can be prepared by the reaction of ammonia with sulfuric acid according to the following balanced equation:
2 NH3(g) + H2SO4(aq) → (NH4)2SO4(aq)
If a reaction vessel has 3.29 L of NH3 at 31.5°C and 22.7 atm, how many grams of H2SO4 are needed to completely react with it?
_________________ g H2SO4. Do NOT enter unit. Report your final answer with 3 SFs.
Answer:
Ammonia reacts with sulphuric acid to give the fertilizer ammonium sulphate.
Explanation:
Describe the electronic structure of halogen how it changeS down the group
Plzzz help me answer this question!!,!
PLZ HELP PLZ HURRY NO WRONG ANSWER PLZ ALSO WILL GIVE BRAINLIEST
An atom of an element contains 6 protons, 6 neutrons, and 6 electrons. An atom that is a different isotope of this element would contain —
A.
6 protons, 7 neutrons, and 6 electrons.
B.
6 protons, 6 neutrons, and 7 electrons.
C.
7 protons, 6 neutrons, and 6 electrons.
D.
7 protons, 7 neutrons, and 7 electrons.
Answer:
I dont lnow much about chemistry, but I believe it's either d or a. sorry if its wrong!
write the molecular formula for the following compound.
Answer : The molecular formula of the compound is, [tex]C_8H_9O_3N[/tex]
Explanation :
Molecular formula : It is the representation of substance by the symbols and it denotes the number of atoms of each element present in the compound.
Now count the number of carbon, hydrogen, nitrogen and oxygen atoms present in the given compound.
As we see that in the given compound, there are 8 atoms of carbon element, 3 atoms of oxygen element, 1 atom of nitrogen element, 9 atoms of hydrogen element.
Thus, the molecular formula of the compound will be [tex]C_8H_9O_3N[/tex]
Activities that shows the nature and goals of anthropology,Sociology and Political Science
To answer the question effectively, we will talk about the key words in the question.
ANTHROPOLOGY, SOCIOLOGY AND POLITICAL SCIENCE.
ANTHROPOLOGY; This is the study of human kinds in all times and places,it also entails humanistic study which includes our prehistoric origins and contemporary human diversity as well as topics like social change,globalization,human origin and the world history.
The activities that shows the nature and goals of anthropology includes;
- Looking at ones own culture in a more objective way like an outsider.
- Discovering the things that make people more different from one another.
- Producing new theories and knowledge about human home and their behaviors.
- Discovering/finding out what all people have in common.
There are four fields of anthropology; Linguistic anthropology, Biological anthropology, Archeology and cultural anthropology.
SOCIOLOGY; This is the scientific study of human civilization.
It is systemic and studies of groups and societies that people build
and the effect these have on their behavior.
Sociology greatly focuses on various social connections,
structures, organizations, processes and institutions.
The activities that show the goals and nature of sociology includes;
- Broadening our familiarity on facts about sociology.
- Critically studying the nature of humanity.
- Exposing our minds to the diverse perspectives on attaining the truth.
- Obtaining possible theories about the society.
- Understanding and appreciating that all things in the society are interdependent with each other.
Sociology brings together inputs that are composed of frequent forms and manners,they include; view points, consolidated values, attitudes and the norms of social institutions.
The different branches of sociology are; social psychology,social organisation, applied sociology, population studies, sociological theory and research,human ecology,social change.
POLITICAL SCIENCE; This is a discipline in academics that deals with the study of political processes, institutions, governments and behaviors of people.
It studies the complex behaviors of the people in power, various political actors, such as the government administration, opposition ad the subjects which are the masses.
Anthropology, sociology and political science are areas of social science, whose main objective is to study society in historical, social and cultural contexts.
Anthropology is the science that studies the human being in depth considering biological, social and cultural aspects. Its objective is to understand the development of man in these aspects.Sociology has as its nature the study of societies, its objective is to understand the behavior of man in social formations.Political science is the science that studies the systems of government and formation of political power in society. Its aim is to better understand political institutions and their impact on society.Therefore, the social sciences seek to analyze and understand man through society, culture, economy and politics, with the aim of contributing to the development of a more egalitarian society with a better quality of life.
Learn more here:
https://brainly.com/question/17411805
In lab, you measure out 24.25g of C2H4. How many atoms of H is this?
Answer:
anong sagot jan? d ko kasi alam ehhh penge sagot
The volume of a sphere is given by the equation =4/33, where is the radius. Calculate the volume of a sphere with a radius of 345 pm in cubic meters.
Answer:
its 45 because of 49 og the
Carbon dioxide is in a steel tank at 20C 10 liters and 1 atm. What is the pressure on the gas when the tank is heated to 100C?
Answer:
1.273 atm
Explanation:
We are given:
P1 = 1 atm P2 = x atm
T1 = 20 degree celsius or 293 k T2 = 100 degree celsius OR 373 k
Since the volume remains constant, we don't have to talk about that
From the Gas equation:
PV = nRT
Since number of moles (n) , Universal gas constant (R) , Volume of the gas (V) are constants
P / T = k (where k is a constant)
Hence we can say that P1 / T1 = k --------------(1)
Also, P2 / T2 = k -------------------------------------(2)
where k is the same constant
From (1) and (2):
P1 / T1 = P2 / T2
Now, plugging the values in this equation
1 / 293 = x / 373
x = 373 / 293
x = 1.273 atm
Therefore, the pressure of CO2 after increasing the temperature to 100 degree celsius is 1.273 atm
Active and inactive volcano in philipines?
355 volcanoes in the Philippines are inactive.
24 volcanoes are active
Answer:
TAAL ACTIVE
MAOUNT BALUGAO INACTIVE
Explanation:
boiling and melting points exploration
Answer:
Boiling- 212° F melting- 32°F
Explanation:
Starting from position 3,5 go west 7 , then south 7, then east 4 what’s your ending point?
Answer:
-1, -2
Explanation:
West is left south is down east is right
When a solid is placed in a container and heat is applied, a phase change occurs. Watch the video and identify which of the following statements are correct.
a) The temperature increases while all of a liquid is converted to a gas.
b) The average kinetic energy of the system changes while all of a solid is converted to a liquid.
c) Temperature remains constant while all of a solid is converted to a liquid.
d) When heat is applied to a solid, the molecular motion decreases as the temperature increases.
e) When a solid is converted to a liquid, heat is absorbed.
Answer:
Temperature remains constant while all of a solid is converted to a liquid.
When a solid is converted to a liquid, heat is absorbed.
Explanation:
During a phase change, the temperature of the system remains constant. Recall that latent heat is defined as heat that causes a change of state without a corresponding rise in temperature of the system.
When a solid is converted to a liquid, latent heat of fusion is involved hence the temperature of the system remains constant throughout the process.
Similarly, heat is absorbed as intermolecular forces are broken up and the would converts to liquid.
5. The sphere shown below is placed in a full overflow cup and sinks to the bottom. How much water is displaced by the sphere?
4.6 cm
O A. 51.0 ml
OB. 66.5 ml
O C. 88.6 mL
O D.407.7 ml
Answer : The correct option is (A) 51.0 mL
Explanation :
As we know that water displaced is equal to the volume of sphere.
Now we have to determine the volume of sphere.
Formula used:
Volume of sphere = [tex]\frac{4}{3}\pi r^3[/tex]
where,
r = radius of sphere
Given:
Diameter of sphere = 4.6 cm
Radius of sphere = [tex]\frac{Diameter}{2}=\frac{4.6cm}{2}=2.3cm[/tex]
So,
Volume of sphere = [tex]\frac{4}{3}\times 3.14\times (2.3cm)^3[/tex]
Volume of sphere = [tex]50.94cm^3\approx 51.0 cm^3[/tex]
Water displaced = Volume of sphere = [tex]51.0 cm^3[/tex]
We know that:
[tex]1cm^3=1mL[/tex]
So,
Water displaced = 51.0 mL
Therefore, the correct option is (A) 51.0 mL
Answer:
A. 51.0 mL
Explanation:
i did this question in my quiz :)
2. In India mostly ......
... are reared for getting wool.
Answer:
yes.... reared for getting wool.
A block of metal has a mass of 85g and a volume of 6.35mL. What is the density?
Answer:
13.39
Explanation:
Density is g/mL divide the grams by the mL
1. What does the rule of law mean?
2. How does the rule of law protect Citizen?
3. How does the rule of law impact lawmakers and courts?
Answer:
I answer this one before
Explanation:
right
Answer:
1. A principle under which all persons, institutions, and entities are accountable to laws that are: Publicly promulgated. Equally enforced. Independently adjudicated. And consistent with international human rights principles.
2. The laws are clear, publicized, and stable; are applied evenly; and protect fundamental rights, including the security of persons and contract, property, and human rights. The processes by which the laws are enacted, administered, and enforced are accessible, fair, and efficient.
3. It codifies the core values of the people. Courts have the responsibility to interpret the Constitution's meaning, as well as the meaning of any laws passed by Congress. Everything they do must be based on the law, and they are accountable for their decisions. That means officials are held responsible for the choices they make.
4 800 000 in scientific notation
Answer:
4.8*10^6
Explanation:
Simply count the number of decimal places moved to the left until you get 1 digit IN front of the decimal
Which of the following correctly
states the difference between
elements and compounds?
Elements and compounds are the
same because they are both made of
atoms,
An element is made of two or more
types of atoms combined, while a
compound is made of one type of
stom,
An element is made of one type of
tcom, while a compound is two or
more types of stoms combined.
Answer:
An element is made of one type of atom, while a compound is two or
more types of atoms combined.
Explanation:
An element is a distinct substance that cannot be split up into simpler substances. Elements are substances that consists of only one kind of atom.
Compounds are substances composed of two or more kinds of atoms/elements joined together in a definite grouping.
There are over a hundred elements known to date. Each one of the elements is symbolized by a capital or a capital letter followed by a small letter derived from English, Latin or Greek Examples are copper, gold, ironThe properties of a compound are distinct and different from those of the individual elements that are combined in its make up. There are several millions of compounds known. They are usually represented by chemical formulae.As we can see, compounds are indeed made up of more than one types of atoms whereas an element is made up of just one single atom.
You measured the mass of Coke as 21.36 grams and the volume as 20.50 ml. What is the density of Coke in
g/mL?
Answer:
The answer is 1.04 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of coke = 21.36 g
volume = 20.5 mL
So we have
[tex]density = \frac{21.36}{20.50} \\ = 1.0419512...[/tex]
We have the final answer as
1.04 g/mLHope this helps you
Plz help don’t understand.
Answer:
the last one i think
Explanation:
Use the PhET simulation to identify what happens to the concentrations of a dilute Drink mix mixture or a pure Drink mix solution for the following scenarios. A pure Drink mix solution can be obtained by draining all the mixture, then adding Drink mix to the container as a Solution (radio button in the upper right area of the simulation). Note that the Concentration meter can be placed toward the bottom of the container or in the stream of the Drink mix. Drag the appropriate items to their respective bins.
Hello user, you did not add a picture of an attachment to enable me help you solve this problem. Please check the attachment I added i believe it is the question that needs to be solved.
Explanation:
1. In the first column
INCREASE CONCENTRATION: these are the items that needs to be placed in this bin
a. Add drink mix solid to a diluted mixture of drink mix in pure water
b. Add drink mix solution to a diluted mixture of drink mix in pure water
c. Add drink mix solid to pure drink mix solution
d Evaporate water from a diluted mixture of drink mix in pure water
e Evaporate water from pure drink mix solution
2. The items below are what should be placed in this bin,DECREASE CONCENTRATION:
a. Add water to a diluted mixture of drink mix in pure water
b. Add water to pure drink mix solution
3. These items here should be placed here. DOES NOT AFFECT CONCENTRATION:
a. Add pure drink mix solution to pure drink mix solution
b. Drain the pure drink mix solution
c. Drain the diluted mixture
what is the meaning between fission and fusion
Answer:
Both are nuclear reactions that produce energy,but the applications are not the sameExplanation:
Fission -is the spitting of a heavy,unstable nucleus into two lighter nuclei Fussion -is the process where two light nuclei combine together releasing vast amounts of energy.ARE MINERALS man-made?
Answer:
no
their made from the earth
I need help on this, the question in here:
Answer:
The wheel size does not affect the speed of the skateboard.
Explanation:
This is true because Nikki's average time goes up while Lisa's goes down, so it depends on how hard they are pushing the skateboard with their foot.
Selenium-81 has an abundance of 21.91% and a mass of 80.65 amu.
Selenium-84 has an abundance of 23.35% and a mass of 83.67 amu.
Selenium-80 has an abundance of 54.74% and a mass of 79.64 amu.
What is the average atomic mass of Selenium according to these values?
Answer:
80.80amu
Explanation:
multiple each value by its percentage (in decimal form) and take the sum.
80.65x.2191 + 83.67x.2335 + 79.64x.5474 = 80.802296 sig figs = 80.80
How many liters of soft drink are there in 5.25 qt?
Answer:
4.69 liters
Explanation:
I hope this helps.
How is this correct.how is this not wrong.Did you get it right.If you did explained please.
PLZ HELP HURRY PLZZZ
Answer:
alkali metals
Explanation:
s block elements are also called alkali metals
Which atom has the largest atomic radius