HELPP PLEASE
Isotopes have different number of........... *

Protons
Electrons
Neutrons
Protons and Neutrons

Answers

Answer 1

Answer:

neutrons. they have the number of protons and electrons

Answer 2
Neutrons because neutrons are neutral so this means the element doesn’t change

Related Questions

What mass of ethanol will All
a 250.0 ml container if its
density is 0.789 g/ml?

Answers

Answer:

The answer is 197.25 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

volume = 250 mL

density = 0.789 g/ml

So we have

mass = 250 × 0.789

We have the final answer as

197.25 g

Hope this helps you

Can someone please help

Answers

Answer:

3

Explanation:

3 ampers (it says in the problem)

Calculate the entropy change when 4.31 g of H2 reacts with O2 according to the reaction

2 H2(g) + O2(g) → 2 H2O(l)

at 298 K and 1 atm pressure. The standard molar enthalpy of formation of H2O(l) at 298 K is −285.8 kJ/mol. The corresponding free energy of formation is −237.2 kJ/mol.

Answer in units of J/K.

Answers

Answer:

Explanation:

ΔG  =  Δ H - T ΔS

Given , ΔG = -237.2 kJ / mol

Δ H = - 285.8 kJ / mol

T = 298

Putting the values in the equation

-237.2 = - 285.8 - 298 x ΔS

ΔS  = .163 kJ / mole K

moles of water formed = 4.31 / 2 = 2.155

entropy change required = 2.155 x .163 kJ / K

= 351.26 J / K .

2.18 x 10^6 ng = 2.18 x 10^? mg

Answers

Answer:

2.18 * 10^12 mg

Explanation:

1 nanogram [ng] = 10^6 milligram [mg]

2.18 * 10^6 ng/ 1 ng = X mg / 10^6 mg

X mg = 2.18 * 10^12 mg

Answer:

2.18 * 10^12 mg

Explanation

Which formula is an ionic compound?
A.NaF
B.N2
C.NO2
D.CO2

FIRST ACCUAL ANSWER GETS BRAINLIST :)

Answers

Answer:

NaF

Explanation:

Answer: the answer is Naf

Explanation
and I love pop tart kitties OWO but i hope this helped i have a in science so i got 100% on it bye bye OWO

what is the density of an object with a mass of 100 grams and a volume of 50 cm​

Answers

Answer:

2

Explanation:

because 100÷50=2m÷v=d

1s^ 2 2s^ 2 2p^ 6 3s^ 2 3p^ 6 4s^ 2 3d^ 10 4p^ 2 what element is this

Answers

Answer:

please use shell notation

What determines the carrying capacity of an environment

Answers

Carrying capacity, or the maximum number of individuals that an environment can sustain over time without destroying or degrading the environment, is determined by a few key factors: food availability, water, and space

A car travels at 35.0 mi/hr. How far has it gone in 2455 seconds?

Answers

Answer:

The answer is 23.8 miles

Explanation:

The distance covered by an object given it's velocity and time taken can be found by using the formula

distance = velocity × time

From the question

velocity = 35.0 mi/hr

time = 2455 s = 0.68 hr

We have

distance = 35 × 0.68

We have the final answer as

23.8 miles

Hope this helps you

how many molecules are in 3.40L of H2O vapor at STP?*

Answers

Answer:

9.14 x 10^22 molecules

Explanation:


Convert the following to Celsius
16) 100°K
17) 200°K
18) 273°K
19) 350°K

Answers

Answer:

16) -173.15cel

17)-73.15cel

18)-0.15

19)76.85

Explanation:

I converted kelvins to cel

Brainly pls

Electron Dot Structures

Draw the electron dot structures for the following elements:

Magnesium (Mg)


Lithium (Li)


Argon (Ar)


Carbon (C)


Sulfur (S)


Helium (He)


Aluminum (Al)


Nitrogen (N)


Silicon (Si)


Hydrogen (H)


Calcium (Ca)


Neon (Ne)


Potassium (K)


Boron (B)


Chlorine (Cl)

Answers

Answer:

surf (S)

tide (T)

champion (C)

Explanation:

wag mo nlng pansinin

Crystallisation is a separation technique used to separate____ solids from a liquid solvent.

Answers

Answer:

separate soluble solids from liquid

Explanation:

A in Chemistry

Crystallization is a separation technique used to separate solute solids from a liquid solvent.

What is Crystallization?

Crystallization is the process of disuniting or separating two substances or molecules that are mixed, and are of different forms of matter. Such as solid and liquid. The process separates mixtures by three processes. These processes are freezing, precipitation, and deposition.

It is the main process of separating solid from liquid. In this process, the solute came above the liquid in crystal form and this is called precipitation.  

Freezing separates the substance that has a different freezing point.  By deposition, the substance that is solid and called solute is deposited below the liquid in the container.    

                                                                                                                                 

Thus, crystallization separates the solute solids from a liquid solvent.

To learn more about Crystallization, refer to the link:

https://brainly.com/question/17053072

#SPJ2

Maria wants to determine which type of disinfectant kills the most bacteria.

Which of the following is the best way for Maria to determine this?
A.
Interview ten different people to determine which type of disinfectant they prefer.
B.
Put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate.
C.
Ask ten different companies that make disinfectants which type is best.
D.
Put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Answers

A I think thats what I would put

Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. Which best explains the reaction?

Answers

Answer:

Explanation:

Hydrochloric acid and sodium hydroxide can be combined in equal ratios to form sodium chloride and water. Which best explains the reaction? The total volume produced by combining hydrochloric acid and sodium hydroxide will result in the same volume of sodium chloride and water.

What do we call the (+) ion in an ionic bond? *
O Cation
O Anion
O Metalloid
O Covalent

Answers

Answer:

cation

Explanation:

a cation is an ion with a postitive charge. This (cat)ion (+) = cats are good , anion (onion) are not good (-)

How can charged objects interact without touching

Answers

Electrostatic forces are non-contact forces; they pull or push on objects without touching them. Rubbing some materials together can result in something called 'charge' being moved from one surface to the other. Charged objects pull on other uncharged objects and may either push or pull on other charged objects(hopefully this helps)

Can you tell me the Valence Electron of each element?​

Answers

Answer:

Lithium oxide.......................

Explanation:

6. magnicium chloride

2.Barium chloride

3. calcium nitride

4. lithium oxide

5. Aluminium sulphide

plzz mark me brainliest

In an isotope, what does the 'u' stand for?
For example: Lithium isotope: Li-6 6u
The u after 6

Answers

The u is called atomic mass unit.
It is a unit of weight
Like we have kilograms,grams,milligrams, On the atomic level,the unit of weight measurement is AMU or just u for short.

2
A train travels 25 km in 0.5 hrs. How fast is the train going?​

Answers

Answer:

15

Explanation:

Answer:

50 km/h

Explanation:

Since in half an hour it has gone 25km, double that (25 x 2) and you get your answer in km/h. Therefore, the train is going 50km/h.  

The elements least likely to form bonds are found in which group? 15 16 17 18

Answers

Answer:

i think 15 but dont get mad if not (❁´◡`❁)

Explanation:

Answer:

The answer is 18

Explanation:sorry if im wrong TwT

Question 3 (4 points)
A dipole bond is formed when electrons are not shared equally in a covalent bond, resulting in a partial negative charge on one end of the
molecule and a partial positve charge on the other end.
O True
O False

Answers

The answer is true.

Is it true or false??. . .Help me please

Answers

Answer:

I think the answer is true


Which element has four times as many protons in its nucleus than are found in Neon?

Answers

Answer:

Zirconium, Zr, 40

Explanation:

Protons can be found by looking at the atomic number. Neon's atomic number is 10, so just multiply 10 by 4 and you get 40.

Convert 0.0134 Liter to millimeter

Answers

Answer:

13400 millimeters.

Explanation:

Multiply the volume value by 1e+6

A sample has a PH of 4, and another sample has a PH of 9. Which sub is the base? How many times basic is it??

Answers

Answer:

the first one

Explanation:

the first one is the base because it has a lower PH


Jose adds five grams of a chemical to one liter of liquid and observes a reaction. If the reaction is endothermic, what will happen?
A
The liquid's mass increases; therefore, the volume of the liquid will increase
B
The liquids' mass decreases; therefore, the volume of the liquid will decrease.
С
Energy is released during the reaction; therefore, the temperature of the liquid will increase.
Energy is absorbed during the reaction; therefore, the temperature of the liquid will decrease.
D

Answers

Answer:

D. Energy is absorbed during the reaction; therefore, the temperature of the liquid will decrease

Explanation:

In a chemical reaction, the reaction is said to be ENDOTHERMIC if the reaction utilizes or uses energy instead of given it off. In this reaction, Jose adds five grams of a chemical to one liter of liquid and observes the reaction.

According to this question, the reaction is ENDOTHERMIC. This means that energy is absorbed or used up during the reaction; therefore, the temperature of the liquid will decrease i.e. the liquid used in the reaction will become COLDER.

What volume of O2 would be required to react with 4.6 grams of Na

Answers

Volume of O₂ = 1.12 L

Further explanation

The reaction equation is the chemical formula of reagents and product substances  

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products  

Reaction

4Na+O₂ ⇒ 2Na₂O

Ar Na = 23 g/mol

mol Na :

[tex]\tt mol=\dfrac{4.6}{23}=0.2[/tex]

mol O₂ :

[tex]\tt \dfrac{1}{4}\times 0.2=0.05[/tex]

Assume at STP (0 C, 1 atm), 22.4 L for 1 mol , then volume of O₂ :

[tex]\tt 0.05\times 22.4=1.12~L[/tex]

write the molecular fotmula of water​

Answers

Answer:

H20

Explanation:

Answer:

hope it helped you

Explanation:

H2O (u have to write ✍️no 2 below H.

Compare and contrast Transverse Waves and Longitudinal Wave

Answers

there, so you can have choices, though they all mean the same thing.

Other Questions
Left after party and you want to split it into four pieces what fraction of the original cake is each slice? A) 1/8. B) 1/4. C) 1/2. D) 2/1 How does Method 1 to amend the US Constitution reflect the concepts of Federalism and Sovereignty (the will of the people)? What is the slope of the line whose equation is y-4=5/2(x-2) what is the latest song youngboy dropped? (oct.2020) When an earthquake wave passes from the crust to the mantle, the waveA. stops moving.B. reverses direction.C. increases energy.D. changes speed. SOMEONE PLS HELP!!!! ITS FOR MY SPANISH CLASSWrite a short portion of a dialogueboth sides of the conversationin Spanish between you and your classmate in complete sentences. Use the vocabulary from this lesson and the following suggestions as a guide for your answer:You may copy and paste the accented and special characters from this list if needed: , , , , , , , , , , , , , , *Note: The sample sentences/questions in parentheses are just a guide to help you form your sentences/questions. You must come up with your own original answers, keeping academic integrity intact.Greet your classmate and ask him/her when his/her birthday is. (e.g., Good morning, ________. When is your birthday?)Have your friend reply in one sentence. (e.g., My birthday is April 6th.)Hint: Remember to use the Spanish format for dates. Chris P. Bacon owns 13 animals. Some are chickens and some are pigs. There are 40 legs in all. How many of each animal does Chris own?it would be helpful to get the system for the equation as well. PLEASE ANSWER CORRECTLY WORTH 25 POINTS what is john ross's opinion about the way the u.s treated the indian tribes I visited a dentist this morning and prescribed medications and advised me to take complete rest until my inflammation and swollen healing Can someone please help me Electron Dot StructuresDraw the electron dot structures for the following elements:Magnesium (Mg)Lithium (Li)Argon (Ar)Carbon (C)Sulfur (S)Helium (He)Aluminum (Al)Nitrogen (N)Silicon (Si)Hydrogen (H)Calcium (Ca)Neon (Ne)Potassium (K)Boron (B)Chlorine (Cl) What is the main component of red blood cells that carries oxygen?a. carbon dioxideb. hemoglobinc. waterd. salt How did feudalism affect the economy in Europe?Plz help me. Simplify -36 please When she first purchased it, Soledad's computer had 500 GB of hard drive space. After six months, therewere only 407 GB available. Enter and solve an equation to find the amount of hard drive space thatSoledad used in the first six months. Uses as your variable.- 500The equation isShe has usedGB of memory In City A, the temperature rises 7 degrees F from 8AM to 9AM. Then the temperature drops 6 degrees F from 9AM to 10AM. In City B, the temperature drops 2 degrees F from 8AM to 9AM. Then the temperature drop 4 degrees F from 9AM to 10AM. Write an expression that represents the change in temperature from 8AM to 10AM for each city. Simplify and interpret each sum. Which body system has a function most similar to the role lysosome plays for a cell Is it true or false??. . .Help me please write an equation to solve for x. what is the value of x none of this makes any sense to me at all so if y'all get it right amen will mark brainiest this is so hard ty so much