Chemistry High School

(No scammers) can someone help me pls

Answers

Answer 1

Answers is - 198 kilo joules

Related Questions

Which one is the right answers?

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I believe its Sodium Chloride.
I hope that helps!

What is the Great Red Spot on Jupiter?

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Answer:

The Great Red Spot is a storm in Jupiter's southern hemisphere with crimson-colored clouds that spin counterclockwise at wind speeds that exceed those in any storm on Earth. The Great Red Spot has slowly changed over the years, and is currently about 1.3 times as wide as our planet.

TRUE or FALSE: Traits that an organism has can be influenced by factors in the environment.

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Answer:

True

Explanation:

Hope this helps

true. hope this helps have a good day

Which object is smaller than a cell?

Molecule
Organ
Organism
Tissue

Answers

Answer:

Molecule

Explanation:

Levels of organization (atom-molecule-cell-tissue-organ-organ-system-organism)

Answer is the first one

The plant chemical which absorbs sunlight and helps make cell food is
A.osmosis
B.cellulose
C.vaculoe
D.chlorophyll

Answers

Answer:

chlorophyll

Explanation:

i need to write a brief paragraph on why this lab is important, please help!! here is the question!
How can the properties of acids and bases be used to classify solutions?

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Answer:

Acids and bases aqueous solutions will conduct electricity because they contain dissolved ions. Therefore acids and bases are electrolytes. strong acids and bases will be electrolytes. weak acids and bases will be weak electrolytes.

How can you control the flow of power in a circuit?

Answers

There are multiple ways to prevent these situations from occurring. The three most common protective devices are fuses, circuit breakers, and surge protectors

Explanation:

PLEASE HELP

How does increasing the amount of greenhouse gases affect the earth?

It causes more hurricanes and tornadoes.
It lowers the earth's global temperature.
It causes fewer thunderstorms.
It raises the earth's global temperature.

Answers

It causes more hurricanes and tornadoes and it raises the earth’s temperature

Mark other guy brainliest

I needed the answer for the test and he is correct

How many moles are in 46.7g of H2O gas?

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46.7 g=total mass
18.02=18 g= H2O’ molar mass

46.7/18= 2.59.... moles =3 moles
Remember to round

How do i describe endothermic and exothermic changes in matter?

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I hope this helps you with your problem !!!!!

potassium solid and aqueous zinc chloride react to produce what?

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K (s) + ZnCl (aq) ====》 KCl ( aq) + Zn (s)

State two methods to increase the rate of the chemical reaction and explain
for each, in terms of particle behavior, how each method would increase
reaction rate.
METHOD 1:
Explanation:
METHOD 2:
Explanation:

Answers

Answer:

METHOD 1: (surface area of a solid reactant) METHOD 2: (concentration or pressure of a reactant)

Explanation:

METHOD 1: (surface area of a solid reactant) Increasing the surface area of a solid reactant exposes more of its particles to attack. This results in an increased chance of collisions between reactant particles, so there are more collisions in any given time and the rate of reaction increases.

METHOD 2: (concentration or pressure of a reactant) Increasing the concentration means that we have more particles in the same volume of solution. This increases the chance of collisions between reactant particles, resulting in more collisions in any given time and a faster reaction. As we increase the pressure of reacting gases, we increase the rate of reaction.

Are the following equations balanced or unbalanced?

1. SnO2 + 2H2 → Sn + 2 H2O

2. 4NH3 + 5O2 → 4NO + 6H2O

3. 2B2Br6 + 5HNO3 2 B(NO3)3 + HBr

4. 2KNO3 + 1H2CO3 → 1K2CO3 + 2HNO3

Answers

1. balanced
2. balanced
3. unbalanced
4. balanced

a solution is prepared by dissolving 55g of CaCl2 into 300g of water. if the Kf of water is -1.86 c/m, shat is the freezing point depression of the solution

Answers

Answer:

Relation between , molality and temperature is as follows.

T =

It is also known as depression between freezing point where, i is the Van't Hoff factor.

Let us assume that there is 100% dissociation. Hence, the value of i for these given species will be as follows.

i for = 3

i for glucose = 1

i for NaCl = 2

Depression in freezing point will have a negative sign. Therefore, d

depression in freezing point for the given species is as follows.

Therefore, we can conclude that given species are arranged according to their freezing point depression with the least depression first as follows.

Glucose < NaCl <

Explanation:

please help im so bad at science

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a.bond energy

c. endothermic reaction

d. exothermic reaction

f.exothermic

g.endothermic

Can someone answer this, NO ROBOTS!!!!

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Genetic engineering improved the lives if individuals with insulin because it helps the body use and store sugar, since people with diabetes can't produce insulin.

Which of the following best explain how Earth's rotation relates to living systems?

A. Earth’s rotation severely limits the amount of sunlight hitting a given region, which prevents living systems from surviving

B. By stabilizing temperatures for a given region, earth’s rotation helps sustain living systems in that region

C. Earth’s rotation forces many animals to migrate in order to continuously receive the Sun’s rays

D. Because Earth’s rotation brings darkness to a given region, plants are unable to survive in that region at night

Answers

Answer:

I think it's B

But A seems a good answer too

It might be D

But Imma go for C

Explanation:

Which pieces of equipment are
needed to calculate the velocity of a
falling object?
A stopwatch and balance
B speedometer and magnet
C compass and tape measure
D tape measure and stopwatch

Answers

D is the correct answer

A football is moving upwards towards its peak after having been booted by the punter.

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Answer:

draw a square with an errow pointing down

Explanation:

A sample of oxygen gas occupies a volume of 250 mL at .8 atm of pressure. What volume will it occupy at 1.2 atm of pressure?

Answers

167 mL

P1V1 = P2V2
P1 = .8 atm
V1 = 250 mL
P2 = 1.2 atm

Solve for V2 —> V2 = P1V1/P2

V2 = (0.8 atm)(250 mL) / (1.2 atm) = 167 mL

Complete the sentence:
The north pole of a magnet____ the north pole of another magnet.
-will attract
-may repel, attract, or not affect
-will not affect
-will repel

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the north pole of the magnet will repel the north pole of another magnet

I need help with my science project someone help me answer it!

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Answer:

food

Explanation:

In the future what two planets will earth resemble?

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Answer:

Venus and Mars?

Explanation:

what is my name?
chetana
ikshya
grishma
bhumika
puja

Answers

they're name of bunch of girls.

How many grams is 2.393 x 10^24 atoms of CI
70.45 g CI
140.9 ga
140.9 mole CI
70.45 mole CI
How many grams is 2.393 x 10^24 atoms of O
70.45 g O
140.9 g O
63.58 mole O
63.58 g O

Answers

Answer: 1. 140.9 g Cl

2. 63.58 g O

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given atoms}}{\text {avogadro's number}}[/tex]

1. [tex]\text{Number of moles of Cl}==\frac{2.393\times 10^{24}}{6.023\times 10^{23}}=3.973moles[/tex]

1 mol of Cl weighs = 35.5 g

Thus 3.973 mol of Cl weighs = [tex]\frac{35.5}{1}\times 3.973=140.9g[/tex]

2. [tex]\text{Number of moles of O}==\frac{2.393\times 10^{24}}{6.023\times 10^{23}}=3.973moles[/tex]

1 mol of O weighs = 16 g

Thus 3.973 mol of O weighs = [tex]\frac{16}{1}\times 3.973=63.58g[/tex]

An alpha particle is identical to a:

helium nucleus
hydrogen nucleus
high energy electron
radium nucleus

Answers

The answer is
Helium
Hope this helped

Answer: helium nucleus

What happens when you mix calcium chloride and hydrogen peroxide?

Answers

Answer:

Explanation: When chlorine reacts with hydrogen peroxide, hydrogen peroxide falls apart into water and oxygen. Chlorine gas hydrolyses into hypochlorous acid (, which subsequently into hypochlorite ions . The reaction between hydrogen peroxide and hypochlorite takes place very quickly.

HELP PLEASE ASAP!!!!!
the cell is undergoing a step of meiosis I. what step is the cell in?
a. the beginning of prophase I
b. the middle of metaphase I
c. the end of anaphase I
d. the middle of telophase I

Answers

Answer:

I think it's c

Explanation:

jenensnsjsjs

The answer would be c it makes more sense hopes this works

The air we breathe is a(n) _____.

Answers

Gas thank me later bro

waste of time.
air = breathing = overrated

In Belize City, on a cloudy day the temperature is 24 degrees Celsius. This is equal to how much in Fahrenheit. *

Answers

The answer is 75.2. Hope this helps! Plus here is proof from a calculators calculations.

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