Chemistry High School

Someone please help I don't know if my answers are correct for this

Answers

Answer 1

Answer:

Your correct it is false

Related Questions

research ocean currents and how they relate to heat transfer.

Answers

Answer:

The movement of this heat through local and global ocean currents affects the regulation of local weather conditions and temperature extremes, stabilization of global climate patterns, cycling of gases

what volume of 0.20 M NaCl contains 10.0 g

Answers

0.862 liters of a 0.20 M NaCl solution (aq) contains 10.0g of NaCl.
Answer : 0.862 liters

Newton's first law is demonstrated in what station?

Answers

Answer:

hope this helps!

Explanation:

This law states that a still object will stay still unless a force pushes or pulls it. A moving object will stay moving unless a force pushes or pulls it. Gravity and friction are forces that constantly push and pull the "stuff" on earth. So, when we roll a ball, it slowly comes to a stop.

A car left from its initial position at 6 pm. The car arrived at its final position at 11pm. How much time did it take the car to arrive ?

Answers

Answer:

5 hours.

Explanation:

Given that,

Initial time, [tex]T_i=6\ pm[/tex]

Final time, [tex]T_f=11\ pm[/tex]

We need to find how much time did it take the car to arrive.

Time = final time-initial time

= 11 pm - 6 pm

= 5

So, it takes 5 hours by car to arrive.

How many moles are 3.21x10^28 moles of N2

Answers

Answer:

number of moles =

[tex]53.3 \times 10 {}^{3} mol[/tex]

Explanation:

here's the solution in attachment.

protons are one of the heavier pieces of an atom. true or false?

Answers

Answer:

true

Explanation:

The air we breathe contains different individual gases (mostly nitrogen and oxygen). Which of the following correctly describes the air we breathe?

a

element

b

compound

c

mixture

d

none of these

Answers

Air is a mixture- the elements and compounds in air aren’t all bonded to each other, so will not be a compound.

Let me know if you have any questions

Heelllpp.!!

How many moles are in 78 grams of Chlorine
gas (CI)?

Answers

Answer:

Grams of chlorine gas to moles

The SI base unit for amount of substance is the mole. 1 grams Chlorine is equal to 0.028206357713029 mole.

Explanation:

There are 2.2000859 moles.

How many grams of water are produced when oxygen reacts with an excessive amount of propane (C3H8)?

Answers

Answer:

From the equation you will see that 1 mol of propane generates 4 mols of water.

Since the molar mass of water

M ( H2O)=2×1+16=18g/mol

2 mol propane will generate

2 ×4×18=144g of water

Explanation:

Since the molar mass of water

M ( H2O)=2×1+16=18g/mol

2 mol propane will generate

2 ×4×18=144g of water

PLEASE HELP I don’t know how to do this

Answers

Moles of Iron : 1.01

Further explanation

Given

Reaction

Fe2O3 + 3CO → 2Fe + 3CO2

34 liters of CO

Required

moles of Iron

Solution

Assumed at STP

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

so for 34 L :

= 34 : 22.4

= 1.518 moles

From the equation, mol Fe :

= 2/3 x moles CO

= 2/3 x 1.518

= 1.01 moles

⚠️⚠️PLEASE HELPP⚠️⚠️
Describe an every day example of an object that has energy of motion and object that has stored energy

Answers

Answer:

Humans

Explanation:

Humans have energy of motion and store energy.

Every object will have any form of energy. For instance, when we are walking we gains a kinetic energy. We use electronic devices where electrical energy is stored and can be converted to mechanical energy to activate any motors.

What is energy transformation?

Energy can neither be created nor be destroyed. However it can be transformed to any other forms. Thus, the total energy will conserved always.

We have a lot of example for energy transformation and storage. The energy form stored by virtue of the position of an object is called potential energy. Whereas, when the object starts moving potential energy converts to kinetic energy.

Thus, thermal vibrations of particles, our every day activities all are associated with a kinetic energy. Kinetic energy of each body depends on the mass and velocity of the body. The more the mass and velocity more will be the kinetic energy.

To find more on kinetic energy, refer here:

https://brainly.com/question/26472013

#SPJ5

Write chemical name ofNH4Cl, Na2CO3.

Answers

Answer:

NH4CI

AMMONIUM CHLORIDE

NA2CO3

SODIUM CARBONATE

HELPPP
i’ll give brainly :)))

Answers

Answer:

12. 2.9 g= 0.0029 13. 14.7 L = 14700 ml

14. The chemical formula of magnesium hydroxide is Mg(OH)2, and its molar mass is 58.32 g/mol.

Explanation:

pls help 6th grade science

Answers

It’s A because it running more faster the the zebra

Jacob walked into a shop to buy cups for his house. He saw the cups shown below. Why does the cup on the right appear yellow? A. The cup absorbs yellow light but reflects all other colors of light. B. The cup reflects yellow light but refracts all other colors of light. C. The cup refracts yellow light but absorbs all other colors of light. D. The cup reflects yellow light but absorbs all other colors of light.

Answers

Answer:

D. The cup reflects yellow light but absorbs all other colors of light.

Explanation:

The cup in the shop appears yellow because the cup reflects yellow light but absorbs all colors of light.

Due to the materials the cup is made of, it is able to specifically reflect yellow and absorb other radiation types.

The color we see are products of the part of visible radiations they reflect.

The cup in this instance reflects yellow and absorbs other color.

An 240. mL sample of oxygen at 90.00C and was cooled at constant pressure
until it has a volume of 450.0 mL. What was the final Celsius temperature of this
gas? *

Answers

The final temperature : T₂ = 680.625 K

Further explanation

Given

V₁=240 ml

T₁ = 90 + 273 = 363 K

V₂ = 450 ml

Required

The final temperature

Solution

Charles's Law

When the gas pressure is kept constant, the gas volume is proportional to the temperature

[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]

Input the value :

T₂ = V₂T₁/V₁

T₂ = 450 x 363 / 240

T₂ = 680.625 K

how many atoms are in 7.00 mol of potassium

Answers

Answer:

7 mole to atom = 4.21549905E+24 atom

Explanation:

1 mole to atom = 6.0221415E+23 atom

2 mole to atom = 1.2044283E+24 atom

3 mole to atom = 1.80664245E+24 atom

4 mole to atom = 2.4088566E+24 atom

5 mole to atom = 3.01107075E+24 atom

6 mole to atom = 3.6132849E+24 atom

7 mole to atom = 4.21549905E+24 atom

8 mole to atom = 4.8177132E+24 atom

9 mole to atom = 5.41992735E+24 atom

10 mole to atom = 6.0221415E+24 atom

Question 9(Multiple Choice Worth 1 points)
(05.03 LC)
Which of the following stars usually shine with the dimmest of light?
O Dwarfs
O Giants
O Main sequence stars
O Supergiants

Answers

main sequence starts maybe

Not sure but I think the main sequence stars

What is the purpose of a catalyst?

Answers

Answer:

option c

Explanation:

as catalyst increases the reaction while activation energy is inversely proportional to rate of reaction, so option c is correct

The purpose of a catalyst to lower the activation energy of a reaction.

What is catalyst?

A type of chemical that, without becoming consumed by the process, speeding a chemical reaction or reduce the temperature as well as the pressure required to initiate one. The addition of a catalyst to speed up a reaction is known as catalysis.

What is activation energy?

The bare minimum additional energy needed by a reactive molecule to transform into a product is considered as activation energy.

The purpose of a catalyst is to lower the activation energy of a reaction.

Therefore, the correct answer will be an option (C).

To know more about catalyst and activation energy.

https://brainly.com/question/11334504

#SPJ3

Scientists say that the solar system formed from______.

Answers

Answer:

a rotating disk of dust and gases

Explanation:

brainliest?

Answer: scientists believe that the solar system was formed when a cloud of gas and dust in space was disturbed, maybe by the explosion of a nearby star (called a supernova). ... Squeezing made the cloud start to collapse, as gravity pulled the gas and dust together, forming a solar nebula.

Explanation:

✨✨What’s 2 similarities and 2 differences between the Earths layers and the atmospheric layers? ✨✨

‼️DONT COPY OFF LINE PLEASE ‼️

Answers

Answer:

Differences: Earth's atmosphere has 5 main layers where as atmospheric layers thins out in each higher layer.

Similarities: They both have multiple layers.

Explanation:

Sorry I only have 1 difference and similarity.

Why is it important to know the temperature of the water when dealing with ions in
an aqueous solution?

Water does not ionize at higher temperatures.

Water becomes very acidic when at low temperatures.

Temperature affects the concentration of water.

The ionization constant of water is usually given at 25 °C.

Water at a higher temperature will produce more ions than water at a lower temperature.

Answers

Answer:

temperature affects the concentration of water

Why is much of the ocean floor so difficult to see?

Answers

Answer:

because ocean currents deposit sediment on the ocean floor.

_____ is responsible for bringing gravity into modern science.

Isaac Newton

Galileo Galilei

Albert Einstein

Answers

Isaac Newton is the answer

If one mole of an unknown substance is 200.59 g/mole, what is the mass of 0.33 moles of that substance?

Answers

Answer: 66.83g

Explanation: (200.59 g/mole = Hg)

0.33 moles = 66.83g

HELPPPP DUE NOWWW (5)

Answers

Answer:

All the answers you chose are correct

Explanation:

Answer:

I cant see the fist question but all that you chose are correct

Explanation:

HELP! URGENTLY NEEDED! I NEED THIS ANSWER IN 5 MINUTES AND PERSON WHO HELPS GET THE ANSWER RIGHT GETS 25 POINTS!!! PLEASE I AM FAILING THIS CLASS AND NEED SO MUCH HELP!!!!

The coefficient/s will balance the chemical equation CH4 +O2 -------» CO2 + H2O is

a

1, 2, 1, 2

b

2, 1, 1, 2

c

2, 2, 1, 1

d

1, 1, 1, 2

Answers

Answer:

hey miss

Explanation:

The coefficients : a. 1,2,1,2

Further explanation

Given

Reaction(unbalanced)

CH4 +O2 -------» CO2 + H2O

Required

The blanced equation

Solution

Give a coefficient

CH4 +aO2 -------» bCO2 + cH2O

Make an equation

C, left=1, right=b⇒b=1

H, left=4, right = 2c⇒2c=4⇒c=2

O, left=2a, right=2b+c⇒2a=2b+c⇒2a=2.1+2⇒a=2

The equation becomes :

CH4 +2O2 -------» CO2 + 2H2O

HELP HELP HELP HELP HELP

Answers

In order to properly measure the displacement, the object must be completely submerged, however in the diagram the wood is floating. So the measured displacement will only be a fraction of what it actually is.

DESPERATE WILL GIVE BRAINLIST AND THANKS (PLEASE HURRY )
Look at the Punnett square below which shows the cross between two frogs. Green is the dominant skin color while brown is the recessive skin color. What are the phenotype probabilities?

Question 8 options:

50% green, 50% brown

25% green, 25% brown

100% green, 0% brown

75% green, 25% brown

Answers

A.Green and brown are equally expressed so they are both dominant. (50%)

B.Green is more common than brown so more green genes are passed on. (25%)

C.The gene for green color is dominant over the gene for brown color. (0%)

D.The gene for brown color is dominant over the gene for green color. (100%)

is pH 6 a weak or strong acid?

Answers

Answer:

6 pH is a weak acid

Explanation:

Generally, a strong acid has a pH of about zero to 3.

The pH scale typically ranges from 1 to 14, with lower numbers representing acids, higher numbers, bases. Neutral liquids like water have a pH of 7.

(Please heart the answer if you find it helpful, it's a motivation for me to help more people)

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