Chemistry High School

Help ASAP POINTS ARE ADDED !!!!!!due in 3 minutes

Answers

Answer 1

Proton:

Positive

Found in Nucleus

Mass of 1 AMU

Neutron:

Neutral

Found in Nucleus

Mass of 1 AMU

Electron:

Negative

Found in orbitals

Mass of 0 AMU

Related Questions

10) How much 0.075 M NaCl solution can be made by diluting 450 mL of 9.0 M NaCl?

Answers

Answer:

54L

Explanation:

I need help with this question

Answers

Hello I was wondering if you eventually got the answer?

PLEASE HELP QUICK AS POSSIBLE!!!!

How much heat is required for 25.0g of water to rise in temperature from 35.0 to 75.0°C?

Formulas~
*q = mcT (temp change)
*q = mH (phase change)

Answers

Answer:

4180J

Explanation:

(25.0g)(4.184J/g°C)(75°C-35.0°C)

(25.0g)(40.0°C)(4.184J/g°C)

(1.00*10³g°C)(4.184J/g°C) = 4184J

use sig figs:

4180J

Q4
Which of the following is an example of nonpoint source pollution?
A. industrial effluent
B. Agricultural runoff
C. illegal dumping of waste
D. Oil leaking from your car

Answers

Answer:

Option C.

Ilegal dumping of waste

Explanation:

This is because non point source of pollution refers to source of pollution that are many and not directly one which is illegal or does not meet the legal term. This type of pollution does not have a point source, it has many sources and this type of pollution is cause by rainfall or precipitation. Where when the rain fall, it wash away the waste through to water bodies, causing pollution and endangering water bodies.

Help!!!
Is KOH soluble or insoluble in water?
Insoluble
Soluble

Answers

Answer: yes, it's soluble in water.

The ______ properties of a substance can be observed only when it undergoes a change to become an entirely different kind of substance with different properties.

Enter the answer

Answers

Answer:chemical

Explanation:

CaC2(s) + 2H2O(l) --> Ca(OH)2(aq) + C2H2(g) In the reaction above, 0.5487 grams of calcium carbide are completely consumed to produce acetylene gas, C2H2. What volume (in mL) will this gas occupy if it is collected at 43 degrees Celsius and 0.926 atm pressure

Answers

Answer:

239.7mL

Explanation:

Using the general gas equation;

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas constant (0.0821 Latm/molK)

T = temperature (K)

The balanced chemical equation in this question is as follows:

CaC2(s) + 2H2O(l) --> Ca(OH)2(aq) + C2H2(g)

From the equation, 1 mole of CaC2 produces 1 mole of ethylene gas, C2H2.

Using mole = mass/molar mass

Molar mass of CaC2 = 40 + 12(2)

= 40 + 24

= 64g/mol

mole = 0.5487/64

mole = 0.00857mol of CaC2

Hence, 0.00857mol of CaC2 produced 0.00857mol of C2H2

Based on the information provided, n = 0.00857mol, T = 43°C = 43 + 273 = 316K, p = 0.926 atm

PV = nRT

V = nRT/P

V = 0.00857 × 0.0821 × 316/0.926

V = 0.222/0.926

V = 0.2397L

In mL, volume = 0.2397 × 1000

= 239.7mL

what chemical is 2:8:6 in electrons?

Answers

Sulfur has 2:8:6 no. of electrons.

Can someone plz help me with this one problem plz!!!

Answers

Answer:

I think it is C

Explanation:

I just do.

Sorry for spamming but this is due tomorrow! Can someone help me please!!

Answers

Answer:

1. in the Northern Hemisphere the vernal equinox falls about March 20 or 21, as the Sun crosses the celestial equator going north. In the Southern Hemisphere the equinox occurs on September 22 or 23, when the Sun moves south across the celestial equator.

Explanation:

Hope this helps ^^

A wildfire destroys most of the plant life in a forest. What would most likely happen to the animals that lived in the forest?

Answers

Answer:

They would be pushed out and lose their homes

Explanation:

A wildfire destroys most of the plant life in a forest. Animals would be pushed out and lose their homes.

What is wildfire?

An unplanned, uncontrolled, and unpredictable fire inside an area of flammable vegetation is known by several names, including wildfire, bushfire, bushfire, wildland fire, and rural fire. A wildfire may be more precisely referred to by the terms bushfire, desert fire, forest fire, hill fire, peatland fire, prairie fire, vegetable fire, or veld fire, depending on the kind of vegetation that is present.

Wildfires are separate from controlled and prescribed burning, which is a good human use of wildland fire, even though controlled burns have the potential to turn into wildfires. Wildfires likely started shortly after terrestrial plants first appeared, which occurred in the Silurian epoch 419 million years ago, according to fossil charcoal. A wildfire destroys most of the plant life in a forest. Animals would be pushed out and lose their homes.

Therefore, animals would be pushed out and lose their homes.

To know more about wildfire, here:

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Organisms that get energy by eating dead organisms are called *

scavengers
omnivores
herbivores
decomposers

Answers

Answer:

The Answer is A. Scavengers

This equation is balanced.
C + S8 -4CS2

True
False

Answers

False.....................

I think the answer would be false because there’s no = to even begin with

Magnesium hydroxide is added to a solution of hydrochloric acid. A reaction occurs and magnesium chloride and water are formed. Testing the _______ would show that a reaction has occurred.

Answers

Answer:Magnesium (Mg) is a - reactant

Hydrogen (H2) is a - product

magnesium chloride (MgCI2) is a - product

hydrochloric acid (HCI) is a - reactant

Explanation: It’s in my notes

Can i titrate a solution of unknown concentration with another solution of unknown concentration and still get a meaningful answer

Answers

Answer:

No, I don't think so at least

Explanation:

In chemistry, you do calculations to find the concentration of a solution with another solution of KNOWN concentration. Without concentrations of either solution, were would you get values from? Where would you start? :3

You can not titrate a solution of unknown concentration with another solution of unknown concentration and still get a meaningful answer.

Titration involves the standardization of unknown solution using a standard solution. By this definition, titration must involve a standard solution.

Since the two unknown solutions are not standardized, we can never get a meaningful answer because we can not be able to perform any calculation unless we have a standard solution.

Learn more: https://brainly.com/question/2728613

Radioactive decay occurs when the ____ decays

Answers

Answer:

nucleus i think

Explanation:

How many grams of 5% barium hydroxide solution will be needed to react 2 moles of sulfur (IV) oxide?

Answers

Answer:

DONT PRESS THAT LINK IT IS VIRUS AND HACK

Explanation:

The water cycle describes the continuous movement of water on earth. Which part of the water cycle is directly responsible for returning water to the soil

Answers

Answer:

mmmh..

Explanation:

sorryy id really ñike to help but i just dont know it...

PLEASE HELP ILL MARK BRAINLIEST

Answers

Answer:

1. true

2. existing matter

3. the materials simply turn into gases you cannot see

hope that helps! ☺

plz mark Brainliest!

In a closed system for the reaction: A (g) + 2B (g) → AB₂ (g) The rate of the reaction increases when there is
A) an increase in pressure
B) an increase in the reaction vessel
C) a decrease in the concentration of A
D) an increase in surface area of A

Answers

Answer: D

Explanation: an increase in surface area of A

Santee Cooper is stocking lakes Marion and Moultrie with 109,000 sterile grass carp. The grass carp, which eat hydrilla (Invasive species), are the most effective and least Intrusive means to control the weed. What type of control are they using?
A Invasive
B biological
C.chemical
D physical

Answers

Answer:

biological

Explanation:

i took the test and got it right

CAN SOMEONE HELP ME WITH AS MANY AS POSSIBLE! I WILL GIVE MORE POINTS IF GIVEN ALOT

Answers

Answer:

1.Hydrogen peroxide,2.Potassium nitrate,3.Ethane,4.Ammonium phosphate,5.Aluminium sulfate,6.Barium hydroxide,7.Calcium phosphate,8.Calcium chloride,9.Copper nitrite,10.Iron oxide,11.Sulfuric acid,12.Phosphoric acid,13.Mercury chloride,14.Potassium sulfite,15.Potassium manganate,16.Magnesium acetate,17.Magnesium nitrate,18.Sodium chloride,19.Sodium acetate,20.Ammonium bromide

1. Which of the following is not an example of a form of carbon?
O fullerenes
O graphite
salt
diamond

Answers

Salt diamond. Cuz those are mineral .

How many moles of sulfuric acid (H2SO4) are present in 500.0 mL of 0.15 M H2SO4 solution?

Answers

Answer:

Number of moles = 0.075 mol

Explanation:

Volume = 500.0 mL = 0.5 (Converting to L by dividing by 1000)

Molarity = 0.15 M

Number of moles = ?

The relationship between the quantities is given as;

Molarity = Number of moles / Volume

Number of moles = Molarity * Volume

Number of moles = 0.15 * 0.5

Number of moles = 0.075 mol

What is the difference between speed and acceleration?
Please help :)

Answers

Answer:

Speed is how fast you are going at the moment but acceleration is how fast you are building up speed to get to a set point

Explanation:

Please Help I need to finish this by the end of the day!

Answers

Answer:

Explanation:

If I am not mistaken, due to the conservation of mass, whatever mass is on the side of the reactants should be the same for the product side.

This means

218.76g+53.96g = 272.72g

272.72g-266.66g = 6.06g

So the answer should be C

the action force
According to Newton's third law of motion, a reaction force between two objects is
but in the opposite direction.
equal to
greater than
less than

Answers

Answer:

equal to - it's opposite but equal energy is the third law

Select the compound that is soluble in water?

Answers

Answer:

NaOH

Explanation:

NaOH is among the water soluble bases

Consider this reaction: NH4+ + HPO42− → NH3 + H2PO4−

Which is the conjugate base?

NH4+

NH3

HPO42–

H2PO4–

Answers

The NH3, as it was the acid in the beginning and donated a proton to become more basic.

The conjugate base is formed when an acid loses its hydrogen or proton. In the reaction between ammonium ion and hydrogen phosphate, HPO₄²⁻ is the conjugate base. Thus, option C is correct.

What is a conjugate base?

Conjugate bases are formed when the substance accepts or absorbs the proton or the hydrogen ion from the acids in the solution. It can be said as a base with an added hydrogen ion to it.

The chemical reaction of the acids and the bases has been shown as,

NH₄⁺ + HPO₄²⁻ → NH₃⁺ + H₂PO₄⁻

From the reaction, it can be said that ammonia donated its proton, whereas HPO₄²⁻ accepted hydrogen ions from the acid.

Therefore, HPO₄²⁻ has been the conjugate base in the given chemical reaction.

Learn more about conjugate base here:

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I need help with the question below:

[tex]PCl_5 = PCl_3+Cl_2 \\ [/tex]
Where PCl5 and PCl3 are gasses

In the above equation , Predict the effect of change in :
I. Temperature
ii. Pressure
iii. Removal of Chlorine

Answers

Answer:

1: As the temperature rises, the equilibrium moves towards the products

2: The higher the pressure, the higher the equilibrium goes to the reactants

3: By removing chlorine, the equilibrium moves towards the products

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