Chemistry College

Can someone help me pls, I do not know how to do this. i am trying to help a friend as well​

Can Someone Help Me Pls, I Do Not Know How To Do This. I Am Trying To Help A Friend As Well

Answers

Answer 1

Answer:

Your answer is 5 x 10⁵

I hope it's helps you

Answer 2

Answer:

[tex]thank \: you[/tex]

Can Someone Help Me Pls, I Do Not Know How To Do This. I Am Trying To Help A Friend As Well

Related Questions

Which of the following is an example of a change from gravitational potential
energy to kinetic energy?

Answers

Answer:

The speed of a roller coaster increases as gravity pulls it downhill and is greatest at its lowest point. Viewed in terms of energy, the roller-coaster-Earth system's gravitational potential energy is converted to kinetic energy

Explanation:

a ball held in the air is the example of a change from gravitational potential energy to kinetic energy.

what happens when we mix stone in water observation ​

Answers

Answer:

hope it's help you dear

Explanation:

If one drops a stone into a pond, a very rapid, thin jet of water spouts upwards. ... A cavity forms behind the object during impact on the water surface. This cavity is subsequently compressed by hydrostatic pressure, which leads to the formation of the jet

calculate the number of moles in 2.5 particle NaOH
​

Answers

Answer:

1.5055×10²⁴

Explanation:

................................

As the human population has grown. Earth's ecosystems and the balance
of natural cycles have been negatively affected. What are some
examples of how the social factors of sustainability (Fig. 1-3) could be
used to help repair environmental damage caused by humans?
40 POINTS I NEEDA ASAP

Answers

Some of the negative affects are oil spills from company’s, Air pollution from big factors and landfills.

Some social factors that could repair environment damages can be decomposable plastic. Such as plastic bags, plastic cups and containers.

Describe the differences between models and scientific laws and theories. (

Answers

Answer:

Scientific laws and theories have different jobs to do. A scientific law predicts the results of certain initial conditions. ... In simplest terms, a law predicts what happens while a theory proposes why. A theory will never grow up into a law, though the development of one often triggers progress on

Explanation:

Is thallium, TI, a solid, liquid, or gas?

Answers

Answer:

Thallium is a Solid

Hope it helps

Mark me as Brainliest plz!

:DD

The reaction described by the equation X + Y Z
shown to have the following rate law:
R = K[X] [Y]
What is the effect on the rate if the concentration
of [X] is doubled and [Y] remains constant?

Answers

rate is doubled because Rate is proportional to the concentration of X

You are unable to lift an object. Which property makes the object difficult to lift?(1 point)

mass

density

weight

volume

Answers

Answer:

You are unable to lift an object. Which property makes the object difficult to lift?(1 point)

weight

9. Hydrogen is 99% H, 0.8% ?H, and 0.2% H. Calculate its average atomic mass.


Answers

Answer:  Technically, this cannot be answered, since none of the H atoms have a mass number assigned.  With the assumption noted delow, I calculate 1.012 as the average atomic mass.

Explanation:

My answer is based on assumed masses for the three H isotopes:

1H :   1 AMU

2H:   2 AMU   Deuterium

3H:    3AMU   Tritium

     AMU   Rel Abund.    Wt. Avg

1H 1     99.00%      0.99

2H 2       0.80%      0.016

3H 3       0.20%       0.006

              Sum   1.012

Assuming equimolar quantities of reactants, which compound will react to the greatest extent with boron trifluoride (BF3) in a Lewis acid-base reaction

Answers

BF3 is considered as lewis acid because it’s the acceptor of electron

NH3 is an example of a Lewis Base that will react extensively with BF3 to form the compound BF3NH3

To solve such this we must know the concept of acid-base reaction. Therefore, NH[tex]_3[/tex] is the compound that will react to the greatest extent with boron trifluoride (BF[tex]_3[/tex]) in a Lewis acid-base reaction.

What is chemical reaction?

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

NH[tex]_3[/tex] is an example of a Lewis Base that will react extensively with BF[tex]_3[/tex] to form the compound NH[tex]_3[/tex] + BF[tex]_3[/tex] → [B (NH[tex]_3[/tex])F[tex]_3[/tex]].

Therefore, NH[tex]_3[/tex] is the compound that will react to the greatest extent with boron trifluoride (BF[tex]_3[/tex]) in a Lewis acid-base reaction.

Learn more about the chemical reactions, here:

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True or False
A sphere is a group of parts that work together as a whole.

Answers

false
hope this helps :)

False is the correct answer.

What are the differences of a physical change and a chemical change?

Answers

Answer:

a physical change only changes the look of something whereas a chemical change occurs when one thing has a reaction and it forms a new substance.

Are ALL acids and based
harmful to humans?

Answers

No they aren’t all harmful there are acids like citric acid that are ok to consume

what is the density of a 5 mL sample of 1.95g of Gold

Answers

Answer:

density=mass/volume

=1.95/5 = 0.39 g(mL)-¹

How will a decrease in the concentration of a reactant affect a chemical reaction?

Answers

Answer:

When the concentrations of the reactants are raised, the reaction proceeds more quickly. ... When solids and liquids react, increasing the surface area of the solid will increase the reaction rate. A decrease in particle size causes an increase in the .

Which is an example of a three
dimensional measurement of
volume?
A. 120 cubic meters
B. 120 grams
C. 120 miles per hour
D. 120 units

Answers

Answer:

It's A. 120 cubic meters

It’s a.120 cubic meters

4(a) Why doesn't the water flow out when the hand that presses the cardboard is removed? *

1. water inside glass is lighter
2. there is much water inside the glass
3. cardboard is supported by air pressure
4.
cardboard is strong enough to hold the water

Answers

Air pressure is the weight of a column of air pushing down on an area. ... Because of the air pressure pushing up on the card, the card will stay on the glass and the water will not spill out.

Al(s) + NaOH(aq) → Al(OH)3(s) + Na+(aq) displacement, or decomposition.

Answers

Answer:

Displacement

Explanation:

OH- in the reactant side of the reaction has switched from Na+ to Al 3+ in the product side. Decomposition is where a compound from the reactant side of the reaction would dissolve into elements in the product side, but that's not the case in this example.

In the adjoining figure, the circles with the + sign represent protons and the empty circles represent neutrons. Determine which atoms in the figure are isotopes of each other.

Answers

Answer:

2 and 3 explanation in the comments

Which functional group does the molecule below have?
A. Ether
B. Amino
C. Carbonyl
D. Hydroxyl
SUBV

Answers

Answer:

Ether is the correct answer

Explanation:

It is based.

Filtration is the most appropriate method for separating a solution of water and which substance?

A. alcohol

B. salt

C. sand

D. sugar

Answers

Answer:

Sand

Explanation:

If you get salt or sugar in your water, you have to legit desalinate it to get the water and item out. You need to evaporate the water by increasing temperature and then lower temperature to separate the substances.

If you have alcohol, you need to distill it by trapping it and stuff.

With sand, the molecules are much larger which lets you separate the substances easily.

For example, on a beach, you can slap a handful of sand in your pail, but the sand sinks to the bottom right? You can just pour out the water.

write any two effect of gravity​

Answers

The Earth's gravitational force accelerates objects when they fall. It constantly pulls, and the objects constantly speed up.

a 2.00 mL sample of a substance A has a density of 18.4g/mL and a 5.00 mL sample of substance B has a density of 35.5g/mL. do you have an equal mass of substances A and b?

this question made my brain hurt. please explain :(

Answers

Answer:

no

Explanation:

make use of this formula to find the mass of each sample.

m=density*volume

Iron has a density of 7.86 g/cm3. Calculate the volume (in dL) of a piece of iron having a mass of 4.59 kg .

Answers

Note:
k = 10^3
1 cm^3 = 10^-2 dL

Solutions

Density = (mass)/(volume)
Volume = (mass)/(density)
Volume = (4.59 × 10^3g)/(7.68g/cm³)
Volume = 583.97 cm³
Volume = (583.97 cm³)(10^-2 dL/1 cm³)

So volume = 5.84 dL approximately

Which of the following represents the electronic structure of three elements in the periodic table

A. 2.8.1 2.8.3 2.8.4 B. 2.8 2.8.1 2.8.2
C. 2.7 2.8 2.8.1 D. 2.1 2.8.1 2.8.8.1

Answers

Answer:

a

Explanation:

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What is kaleidoscope? Write it's use .​

Answers

Answer:

Kaleidoscope is an optical toy consisting of two mirrors at a particular angle. Some common uses of the kaleidoscope are: Kaleidoscope produces beautiful patterns that are used by fashion designers. A kaleidoscope is used as a toy for entertainment.

Hope it's helpful

The mass of an atom of element x is equivalent to the total mass of 7 hydrogen atoms

Answers

hydrogen mass is 1, the atom with mass number 7 is Lithium

a mixture , the different parts of which vary in composition and properties​

Answers

Answer:

heterogeneous mixture

Explanation:

(a) A mixture with the same composition and properties throughout is called a homogeneous mixture. (b) A mixture, the different parts of which vary in composition and properties, is called a heterogeneous mixture.

22. Which of the following is contained only in a eukaryotic cell? A. cell wall
B. nucleus
C. chromosomes


23.Which of the following terms represent the chemical reactions to break down food into simpler compounds in an organism?
A. anabolism
B. catabolism
C. nitrogen cycle



24.What types of molecules are bonded together to form a nucleotide? A. 2 nitrogen bases + 1 sugar
B. 2 sugars + 1 phosphate group
C. 1 nitrogen base + 1 phosphate group + 1 sugar


25.Glucose and oxygen are the two products of photosynthesis A. true
B. false


26.What is the first step in the refining of petroleum? A. cracking
B. drilling
C. distillation


27.When radium-226 (atomic number 88) decays by emitting an alpha particle, it becomes _________.
A. polonium-222 B. polonium-224 C. radon-222


28.The general name for hydrocarbons with at least one triple covalent bond is _________.
A. alkenes B. alkanes C. alkynes



29.What particle is emitted in alpha radiation? A. electron
B. photon
C. helium nucleus


30.Which type of compound is this? CH3CH2CH2CH2OH
A. alcohol B. aldehyde C. ether


31.Why are the molecules of hydrocarbons nonpolar? A. The intermolecular attractions are strong.
B. All the bonds are single covalent bonds.
C. The electron pair is shared almost equally in all the bonds.



32. An amino group and a carboxyl group are joined by a ___________ bond. A. peptide
B. protein
C. amino


33.What type of radiation is likely to occur when the ratio of protons to neutrons is below the band of stability?
A. alpha decay
B. beta decay
C. neutron emission


34.Covalent bonds are between bases in a DNA base-pair. A. true
B. false



35.What is the name of the functional group in the following compound? R—NH2
A. halogen B. amine C. ether

Answers

Answer:

22 options A cell wall

23 options A anabolism

24 options B 2sugar + 1phosphate group

Nonmetallic materials that are strong, brittle, resistant to heat and attack by chemicals, and are typically made from clay are known as:________

Answers

nonmetallic materials following that description is ceramics
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During which stage of the ACTIVE reading strategy would you identify the theme of a story?A = Ask questions.OB.C = Create connections.O C.T= Track down important information,OD.1 = Make inferences.O E.V = Visualize.OF.E = Eureka! Combine information, Instructions: Adjectives describe nouns. Write an adjective in the blank space in eachsentence that describes the noun. There are many words you can use, besure to use correct spelling, grammar, and punctuation. Avoid reusingwords.Example: The vicious dog barked at us.124.) The food is125.) She quickly jumped out of the way of thecar. Multiple 8x^8(-6x^3+5x^2+5x) What is 5 x 0.1 + 4 x 0.01 + 8 x 0.001 written in standard form? 4. Find the quotient. -7 14/3 How can I listening English? find the exact coordinates of X on segment JK that is 1/3 the distance from j to k. J (-1,4) K(5,-3) Directions: Translate the following sentences to Spanish using the preterite tense. 1. I ate chicken yesterday. _________________________________________________________2. Julio spoke Spanish in class yesterday. _________________________________________________________3. My sister and I needed to study. _________________________________________________________4. My grandparents sold their house last year. _________________________________________________________5. You bought a car last night. _________________________________________________________6. My sister broke a plate yesterday. _________________________________________________________7. The family drank milk last night. _________________________________________________________8. You all received good grades in Spanish class. _________________________________________________________9. I ran on the beach yesterday. _________________________________________________________10. Isabella and Ricardo studied last night. _________________________________________________________ how can social and environmental responsibilities help to fight unemployment what is a example of the reflexive property. please dont make so much noise. i (study) correct tense Qu tipo de narrador posee el cuento ledo? Rewrite x2 6x + 7 = 0 in the form (x a)2 = b, where a and b are integers, to determine the a and b values. a = 4 and b = 3 a = 3 and b = 2 a = 2 and b = 1 a = 1 and b = 4 Which names are other ways to name _1? Select each correct answer.ypfypyfpyfpypff Marissa earns $1,000 after taxes twice a month. Marissa's monthly bills are $1,200. Marissa deposits 40% of her remaining monthly income into a savings account and annually saves: write at least one of the following questions. What do you consider to be the greatest causes of stress for south African teachers?What contributes to the stressful situation Prove that s=ut+at This material is considered flammable. A paint B glue C Oil D ALL of the above 5. You want to have a pizza party this weekend for some friends and family. You have $48budgeted for the pizza and plan on having 56 pieces available. A large pizza has 16 pieces andcosts $14. A medium pizza has 12 pieces and costs $10. How many large and medium pizzas doyou need to buy? -5r - 3r = ? Can someone explain how to do solve this?