Please help I’m so lost!! Chemistry

Please Help Im So Lost!! Chemistry
Please Help Im So Lost!! Chemistry
Please Help Im So Lost!! Chemistry

Answers

Answer 1

Answer:

i will help you

Explanation:

if the reactions have more energy than the products this means that there is some energy that given outside and this reaction will called an exothermic reaction.

But if the reaction have less energy than the products this means that there is some energy that taken from outside and this reaction is called an endothermic reaction.


Related Questions

The small flag indicating wind direction on a station weather plot points in the direction that the wind is going.

True or False

Answers

Answer:

False

Explanation: The wind's direction is shown by a long shaft. it will point to the direction from which direction the wind is blowing.

False is the true answer

Read the etymology entry.
antagonize
antagonize (v.) 1630s, "to compete with" (obsolete); 1742, "act in opposition to, struggle against continuously,"
from Greek antagonizesthai "to struggle against, oppose, be a rival," from anti "against" (see anti-) + agonizesthai
"to contend for a prize," from agon "a struggle, a contest" (see agony). Meaning "make antagonistic" is by 1882.
What original language did the word antagonize come from?
O Greek
O Latin
O Middle French
O Middle English

Answers

Answer:

latin

Explanation:

im not sure sorry if wrong

Answer:

Greek

Explanation:

Mid 17th century (in the sense 'compete with'): from Greek antagōnizesthai, from ant- 'against' + agōnizesthai 'struggle' (see agonize).

Which object represents a heterogeneous
mixture

Answers

Answer:

oil and water

Explanation:

oil and water - When you put oil and water together they do not mix. Therefore, these are a heterogeneous mixture since they are two separate parts.

What happened a when you try to layer a more-dense solution on top of a less-dense solution

Answers

Answer:

the more dense solution will sink to the bottom the less dense solution will go to the top

Answer:

Explanation:The density of a liquid determines whether it will float on or sink in another liquid. A liquid will float if it is less dense than the liquid it is placed in. A liquid will sink if it is more dense than the liquid it is placed in.

Density of a liquid determines how it will layer (heaviest to lightest). If the liquid us least dense it float to the bottom. Layers will remain separated because each liquid is actually floating on top of the more dense liquid beneath it.


Why are coal, oil and natural gas called fossil fuels

Answers

From heat and pressure from the earth

Aanlyze the potential energy diagram of the
reaction shown.
Which statements about the reaction are true?
Select all that apply.
The reaction is exothermic
The reaction is endothermic
The equation shows that 891 kJ of energy are
released as a product.
The equation shows that 891 kJ of energy are
absorbed as a reactant.
The graph shows that the reactants have greater potential energy than the products.
The answer is a,c,e

Answers

Answer:

A: The reaction is exothermic

C: The equation shows that 891 kJ of energy are released as a product.

E: The graph shows that the reactants have greater potential energy than the products.

Explanation:

The statement about the reaction is true:

A: The reaction is exothermic

C: The equation shows that 891 kJ of energy is released as a product.

E: The graph shows that the reactants have greater potential energy than the products.

What is potential energy?

Potential energy is the energy that is saved in the body. It is used in the work and when convert into kinetic energy.

A moving item fundamentally possesses kinetic energy. Kinetic energy would therefore be created as a result of an object moving or an elastic band being released since the released object exhibits motion.

Therefore, the correct option is A: The reaction is exothermic, C: The equation shows that 891 kJ of energy is released as a product, and E: The graph shows that the reactants have greater potential energy than the products.

To learn more about potential energy, refer to the link:

https://brainly.com/question/15764612

#SPJ2

The molarity of an aqueous solution of CaCl is defined as the

Answers

Answer:

Molarity of aqueous solution of CaCl2 can be defined as moles of CaCl2 per litre of solution

The electron configuration of an element is shown below.

1s22s22p63s23p6

Name the group this element belongs to in the periodic table and explain your answer.

Based on the electron configuration, write one chemical property of this element.

Answers

The element belongs to group 18 and the element is chemically inert.

What is electron configuration?

The term electron configuration refers to the arrangement of electrons in an atom. The electron configuration of an atom can show the group to which it belongs in the periodic table.

Given the configuration, 1s22s22p63s23p6 the element belongs to group 18 and the element is chemically inert.

Learn more about electron configuration: https://brainly.com/question/5524513

The reaction is: Fe2O3 (s) + 2Al (s) → 2Fe (l) + Al2O3 (s)

What mass, in grams, of iron (III) oxide reacted to produce 4.5 mol of Al2O3 ???

Answers

Answer:

718.6 gm

Explanation:

The reaction is: Fe2O3 (s) + 2Al (s) → 2Fe (l) + Al2O3 (s)

What mass, in grams, of iron (III) oxide reacted to produce 4.5 mol of Al2O3

1 mole of Fe2Os produces 1 mol of Al2O3

so 4.5 mols Fe2O3 would produce 4.5 mols Al2O3

the molecular mass of Fe2O3 is

(2 X 55.85) + (16 X 3) =

111.7 + 48 =

159.7

4.5 mols Fe2O6 weighs

4.5 X 159.7 =

718.6 gm

check:

718.6 gm of Fe3O2

what i compound is
FeI2

Answers

Answer:

iodide

Explanation:

Answer:

Iron(II) iodide

Explanation:

Someone please help? I've had a go at this myself (see picture of working attached) but not sure where to go from there?

75ml of a solutipn of 0.1mol l-1 NaOH neutralises 25ml of a solution of an acid. The formula of the acid is HxA and the concentration of the acid is 0.1mol l-1. What is the value of x?​

Answers

Answer:

75 ml of 0.1M  base neutralizes 25 ml of 0.1M acid, which means the acid has 0.3 moles/L of H ion

but that means each molecule of the acid has 3 times as many H ions aH ions in a molecule of NaOH

which means the formula for the acid must be H3A and

the value of x in

HxA is 3

Explanation:

75ml of a solutipn of 0.1moL  l-1 NaOH neutralises 25ml of a solution of an acid. The formula of the acid is HxA and the concentration of the acid is 0.1mol l-1. What is the value of x?​

the concentration of both the and the base are the same at 0.1M

the base...NaOH has 0.1 moles/L of OH ion

75 ml of 0.1M  base neutralizes 25 ml of 0.1M acid, which means the acid has 0.3 moles/L of H ion

but that means each molecule of the acid has 3 times as many H ions aH ions in a molecule of NaOH

which means the formula for the acid must be H3A and the value of x in

HxA is 3

which of the following substances will cross the cell membrance through osomosis

Answers

Answer:Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ).

Explanation:

element Q,X, and Z are in the same group on the periodic table and are listed in order of increasing atomic number.The melting point of element Q is -219 Celsius and the melting point of element Z is -7 celsius. Which temperature is closest to the melting point of element X

Answers

Answer:

Very low ionization energy: metal bonds easily: group 1, or maybe 2 low melting.

Explanation:

Convert 1.53 x 10^24 atoms of carbon to moles of carbon.

1.53 x 10^24 atoms = ________ mol C

Answers

Well one mole of carbon specifies 6.022×10²⁴

INDIVIDUAL carbon atoms, i.e. a mole of carbon.........

Explanation:

And thus we take the quotient.......

[tex] \frac{1.35 \times {10}^{24} ·C·atoms}{6.022 \times {10}^{24} \times C \times atoms } = 2.24 \: mol \\ [/tex]

- BRAINLIEST ANSWERER

Answer:

Use dimensional analysis:

1.27x1024 atoms C x 1 mol C/6.02x1023 atoms = 2.11 mol C

Explanation:

how do you separate the following mixture? Name only the process involved .
1.Sand and salt ​

Answers

Answer:

Just dissolve in water , you can separate

Explanation:

because salt dissolves in water but sand doesn't

Explanation:

sedinentation and decantation

can someone please help me i need this done rn

Answers

Does your teacher know your cheating
Ur spamming the answer thing lol

How many moles of the excess reagent would there be if 2.8mol of N2 were reacted with 15.1mol of H2O?

N2+4H2O ---> 2H2O2+N2H4

Answers

The number of moles of the excess reagent there would be is 3.9 moles

From the question,

We are to determine the number of moles of the excess reagent there would be.

The given balanced chemical equation is

N₂ + 4H₂O → 2H₂O₂ + N₂H₄

This means,

1 mole of N₂ is required to react completely with 4 moles of H₂O

Now,

If 1 mole of N₂ is required to react completely with 4 moles of H₂O

Then,

2.8 moles of N₂ will react completely with 11.2 moles of H₂O

∴ H₂O is the excess reagent

Number of moles of H₂O that would remain = 15.1 mol - 11.2 mol

Number of moles of H₂O that would remain = 3.9 mol

Hence, the number of moles of the excess reagent there would be is 3.9 moles

Learn more here: https://brainly.com/question/2762206

Pls answer.............

Answers

Answer:

Ductile

Explanation:

The metal is ductile, and that is why it can be stretched into wires.

A balloon contains 0.76 mol O2, 0.18 mol Ne, 0.031 mol Xe and 0.026 mol CO2 at 749 mm Hg. What is the partial pressure of Ne

Answers

Answer:

ans given below

Explanation:

To keep simplicity, let's assume these gases behave ideally so we can use the equations for ideal gas. One of these equation is the Raoult's Law written below.

P* = xP

This is another form of the Raoult's Law where x is the mole fraction. Let's find x for O2.

x = 0.18/(0.76+0.18+0.031+0.026) = 0.1805

Partial Pressure = (0.1805)(749 mmHg) = 135.23 mmHg

what is the functional group and homologous series of ethyl butyrate?​

Answers

Answer:

Functional group: ROR'

Homologous series: ester [C6H12O2]

Mark brainliest please

the experimental grip

Compuesto organico que no existe como alqueno ni alquino?

Answers

Answer:

Susssssssssssssssy

Explanation:

Sup

What happens to the pH of a solution is the concentration of hydronium ions decrease

Answers

If the hydronium concentration decreases, the pH increases, resulting in a solution that is less acidic and more basic

what are the products of the reaction: Be(s)+ Cl2(g)⟶

Answers

Answer:

BeCl2

Explanation:

Be+Cl2=BeCl2


Can you force the atoms into new configurations by pushing atoms around? What does this suggest
about the configuration of atoms in real molecules?
What is the difference between Electron Geometry and Molecule Geometry?
In one or two grammatically correct sentences, write a definition for the term Molecule Geometry.

Answers

Answer:

Yes

Explanation:

By forcing the atoms into a new configuration is possible.

The addition of new atoms around the atom will change the electronic geometry of the atoms. The addition of electron-accepting or donating atoms will result in a change in configuration. The configuration change will result in the change in the hybridization of the atom, and it will acquire a new shape. The geometry of the molecule changes and it will acquire the lowest energy state.

This suggests that atoms in real molecules are present in the flexible state of configuration, and are at least energy, The change in the surrounding changes the configuration of the atoms, and are easily configured.

What type of energy is best described as the energy required to break the bonds present in the reactants?
A
activation energy
B
potential energy
С
kinetic energy
D
thermal energy
hay

Answers

Answer:

b

Explanation:

Haty

The energy required to break the bond in the reactants is activation energy .

Hence, option (A) is correct answer.

What is Exothermic Reaction ?

The chemical reaction which releases energy are known as exothermic reaction. Bond forming is exothermic process. Activation energy is needed to initiate the reaction. In exothermic reaction potential energy converted into kinetic energy.

What is Endothermic Reaction ?

The chemical reaction which absorbs heat from the surrounding is known as endothermic reaction. Bond breaking is endothermic reaction.  Activation energy is needed to initiate the reaction. In endothermic reaction kinetic energy converted into potential energy.

Thus, from the above conclusion we can say that The energy required to break the bond in the reactants is activation energy .

Hence, option (A) is correct answer.

Learn more about the Exothermic and Endothermic reaction here: https://brainly.com/question/6357350

#SPJ2

1. Assume samples that emit radiation are placed on a table across the room. Which sample will produce the greatest damage to you? Alpha emitter Beta emitter? Gamma emitter? WHY?

Answers

TLDR: A beta emitting sample will likely produce more damage than a gamma emitting sample due to the associated quality factors. An alpha emitting sample will do zero damage.

A question like this is quite nuanced, so let’s dive in.

Radiation that is made of charged particles (like alpha and beta) behave differently than radiation that is made up of neutral particles (like gamma). Charged particles are characterized by their “range”, which describes how far that particle can go through a medium (like air) before they lose their kinetic energy and become harmless. Alpha particles are relatively heavy and have a range of 1-10 cm in air at atmospheric pressure, so a sample that is an alpha emitter placed on the opposite side of the room will have exactly zero potential of dealing damage to you. You’re simply too far away. For a beta emitter, the range of beta particles is about 4 meters per MeV (a measure of the particle’s energy). This means that a low energy beta can reach you from across the room, and higher energy betas can easily reach you.

Neutral particles are not characterized by ranges, as they interact with matter differently. Instead, they are characterized by “half-thicknesses” based on an exponential attenuation function. The half-thickness of a material is the thickness of the material needed to reduce the intensity of the gamma rays to one-half the original intensity. Because of this, a gamma emitting sample will easily be able to affect you just like a beta sample would be. We now have to use something else to determine which will be worse.

In radiative studies, there exists a parameter for radiation types called the “quality factor”, which adjusts the value for radiation doses to account for the biological impact of each type of radiation. For example, if you were exposed to two different types of radiation with the exact same dose but one had a quality factor of one and the other had a QF of ten, then the radiation with a QF of ten did essentially ten times more damage than the other. Gamma rays have a quality factor of 1, whereas beta rays can have a QF anywhere from 1-20 based on their energy (higher energy = higher QF). Because of this, the beta emitter will likely do more damage than the gamma emitter.

Hope this helps!

The damage caused by the radiations has been maximum for the gamma radiations.

What are charged radiations?

The charged radiations are comprised of the molecules that have been comprised of the charged particles. The charged particles have been alpha, beta or gamma radiation.

The damage that has been caused by the radiation has been found with the intensity of the quality factor and the thickness of the molecule that comprises the amount of damage formed.

The maximum quality factor has been for the gamma radiation. Thus, gamma radiations form the basis for the maximum damage.

Learn more about gamma radiations, here:

https://brainly.com/question/9815840

Which of the following corresponds to an alpha particle?
A. 1/4He
B. 3/2He
C. 2/2H
D. 4/2He

Answers

Answer:

D. 4/2 He corresponds to an alpha particle.

A unit for measuring work is called the _____.

horsepower
effort
time
foot-pound

Answers

Answer:

A unit for measuring work is called the foot-pound

ARTICLE:
When Olafur Eliasson and Frederik Ottesen heard that more than 1 billion people on Earth don’t have access to electricity, they wanted to help. In many places, lack of electricity means students can’t study after dark and families can’t cook after the sun goes down. It’s also harder for doctors and nurses to treat patients without good lighting. Eliasson and Ottesen decided to invent a solar lamp that would provide light without costing a lot of money, polluting the air, or causing fires.
Their solution? The Little Sun lamp is a sun-shaped light with a light bulb on one side and a solar panel on the other. The Little Sun lamp uses energy to provide light to people who need it, but the Little Sun doesn’t make its own energy. To run, the lamp needs to get energy from somewhere else. In this case, that source of energy is the sun. The solar panel on the back of the lamp converts light energy from the sun into potential energy that can be stored in a battery and used later to make the light bulb shine. Little Sun lamps charge in the sun during the day and provide light at night, allowing people to study, cook, work, and take care of other things even after the sun sets. They’re inexpensive, don’t pollute, and don’t cause fires.

questions: 2) How does the Little Sun Lamp help people around the world get light?

3) How does the Little Sun Lamp use energy from the sun to make the light bulb shine?

Answers

Answer:

got light to charge from the sun

Explanation:

they did it so that people don't pollute the ozone layer and thats why they invent that and it help them in every way

An element with 3 valence electrons would be a
0-3 anion
0 + 3 anion
+3 cation
0 - 3 cation

Answers

Answer:

0+3 anion

Explanation:

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.

Other Questions
Evaluate the expression for x = 8x + 558313 Define average atomic mass and explain how it is calculated Career discovery English language art Science Studiesi what precedent was set for a 20th century president with the indian removal act? *PLEASE HELP 50 POINTS + BRAINLIEST*Examine the diagram that shows the levels of organization of an organ system.If level 2 becomes diseased, what is a possible consequence?Question 16 options:The cells will bypass creating tissues, creating the organ directly to limit the spread of the disease to the organism.The organ will fail to function properly, affecting the organ system and consequently the organism.The organ will temporarily shut down until the disease is repaired with the replication of new cells.The organ system will generate more cells to create a new organ to replace the diseased component. Grady, Inc. manufactures model airplane kits and projects production at 650, 500, 450, and 600 kits for the next four quarters. Direct materials are 4 ounces of plastic per kit and the plastic costs $1 per ounce. Indirect materials are considered insignificant and are not included in the budgeting process. Beginning Raw Materials Inventory is 850 ounces, and the company desires to end each quarter with 10% of the materials needed for the next quarters production. Grady desires a balance of 200 ounces in Raw Materials Inventory at the end of the fourth quarter. Each kit requires 0.10 hours of direct labor at an average cost of $10 per hour. Manufacturing overhead is allocated using direct labor hours as the allocation base. Variable overhead is $0.20 per kit, and fixed overhead is $165 per quarter. Prepare Gradys direct materials budget, direct labor budget, and manufacturing overhead budget for the year. Round the direct labor hours needed for production, budgeted overhead costs, and pre-determined overhead allocation rate to two decimal places. Refer to the budgets prepared. Determine the cost per kit to manufacture the model airplane kits. Grady projects sales of 100, 150, 100, and 200 kits for the next four quarters. Prepare a cost of goods sold budget for the year. Grady has no kits in beginning inventory. Please write this in your book and send a picture of answer. Graph f(x) = -2/3x-3 PLS ANSWER AND SHOW HOW ITS GRAPHED This is the album cover I just made lmk what you think Find the value of a/b when a=$13. 93 and B=0. 07Thank you. Mansa Musa went on Hajj in 1324. What made hispilgrimage significant1.2.3. 1. in you own opinion, do you believe that some historical events in our country (Philippines) written by historians are not accurate? explain2. the Spaniards ruled the Philippines for more than 3 centuries. Is there any good contribution they gave to our country? If yes, give at least one contribution they gave to us that we are still applying at present. illustrate it Find the missing measure A 12.0 L helium balloon is inflated in an air-conditioned store at 21.0C. Assuming that the pressure remains constant, how large is the balloon when it is taken outside on a hot day at 40.0C? Think about the things you do on a regular basis. What values are reflected in your daily activities? Please solve and explain part a 10 to the 2 power in fraction form Hormones perform important functions within the reproductive system. During puberty, secondary sex characteristics develop. Which hormone is responsible for the development of these characteristics in the female? estrogen progestin progesterone testosterone. How does social norms affect social relationship? Correct punctuation "ergonomic and easy-to-use," furniture is the specialty of this office supply store.