Which three forces can affect an object without contact?

Answer:

P = protons

E = electrons

N = neutrons

remember protons and neutrons (protons are positive and neutrons are neutral as you can already tell by their names) are found at the centre of the nucleus (positive mass). Whilst the electrons (negative) orbit around the shells

Answer:

6.3*10^-11

no reasoning i just know thats the answer you dont have to trust me.

Answer:

the answer is B if one mol contains of NH4NO3 contains 6.02X 10^23

Answer:

a. 5.2

Explanation:

pOH = -log(1.43 x 10^-9) = 8.845

pH = 14 - pOH = 14 - 8.845 = 5.155 ≈ 5.2

Explanation:

The general equation for an endothermic reaction is: Reactants + Energy → Products.

Hope it helps :)❤

The equation represents an endothermic reaction is reactants + energy

products.

Endothermic reactions are chemical reactions in which the reactants soak up warm strength from the surroundings to form products.

Learn more about the endothermic reaction here:-https://brainly.com/question/6506846

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population is the number of species living in a given area if this is regarding biology or earth studies :)

Answer:

0.06moles/litres

Explanation:

molarity = no of moles / volume in litres = 3.00*10^-2/(450/1000)=0.06 moles/litres

Answer:

0.07mol/dm^3

Explanation:

Please mark as brainliest

Answer:b

Explanation:

Answer:

C.

Explanation:

I took the quiz and made a 100

Answer:

0.75mol/LNaOH

Explanation:

Data: Soln:

M= ? M= n/ V(l)

n= 3moles. M= 3mol/ 4L

V= 4L. M = 0.75 mol/LNaOH

Answer:

Na+H2O =NaO+ H2

Explanation:

Because nitrogen is one , so it is balanced. And Oxygen is one,it is balanced. And Hydrogen is 2 ,and hence it is also balanced.

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1) 2KCIO3=2kci+3o2

2)CH4 + 2O2 → CO2 + 2H2O

3)  2HCl + Ca(OH)2 → CaCl2 + 2H2O

I hope this helped!

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*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer:

178.36 a.m.u

Explanation:

5 have a mass of 176,

5/100 * 176 = 8.8

19 have a mass of 177

19 / 100 * 176 = 33.44

27 have a mass of 178

27 / 100 * 178 = 48.06

14 have a mass of 179

14 / 100 * 179 = 25.06

35 have a mass of 180.0

35 / 100  * 180 = 63

Atomic Mass = 8.8 + 33.44 + 48.06 + 25.06 + 63

Atomic Mass = 178.36 a.m.u

Answer:

Equal forces acting in opposite directions are called balanced forces. Balanced forces acting on an object will not change the object's motion. When you add equal forces in opposite direction, the net force is zero.

Explanation:

Answer:

by adding heat

Explanation:

Adding heat can cause ice (a solid) to melt to form water (a liquid). Removing heat causes water (a liquid) to freeze to form ice (a solid).

by adding heat

when water was changes to soild or a gas , we say change to a different state of the matter. Even though the waters physical from change its molecular stay the same

Answer:

Gill Slits

Explanation:

For the one who asked what hind limbs are they are back legs :)

Answer:

When there is a conflict and if a friend responding to conflict with confrontation it may affect positively or negatively both ways depend how he responds or confront the other person he has a conflict with. But normally people alienate with the person being confrontational. A friend should try to resolve the conflict by making an amicable solution.

if it is used correctly it could help in making the relationship strong, however, confronting by attacking them verbally, insult them, or talking loudly among the group of people can escalate the conflict.

I will advise him to be cautious of the approach as it may positively or negatively affect the situation.

This is the process which involves directly engaging one another in the course of a dispute between them.

This method however could either resolve the conflict or worsen it which is why special approach should be taken by being calm and being respectful to the other party involved.

Read more about Confrontation here https://brainly.com/question/1004819

Answer:

%C = 54.53%

%H = 9.144%

%O = 36.32%

Explanation:

Step 1: Calculate the mass of each element in 1 mole of C₄H₈O₂

We will multiply the number of atoms by the molar mass of the element.

mC: 4 × 12.01 g = 48.04 g

mH: 8 × 1.007 g = 8.056 g

MO: 2 × 16.00 g = 32.00 g

Step 2: Calculate the mass of 1 mole of C₄H₈O₂

We will sum the previously calculated masses of the elements.

mC₄H₈O₂ = mC + mH + mO = 48.04 g + 8.056 g + 32.00 g = 88.10 g

Step 3: Calculate the percent composition of each element

We will use the following expression.

%Element = mElement / mCompound × 100%

%C = 48.04 g / 88.10 g × 100% = 54.53%

%H = 8.056 g / 88.10 g × 100% = 9.144%

%O = 32.00 g / 88.10 g × 100% = 36.32%

Answer:

Explanation:

The left electrode will be positive on the grounds that focus on the concentration that the cell electron moves from a lower concentration fixation to a higher concentration. Thus right electrode will go about and act as an anode and will be negative.  Also, the left electrode will be the cathode and will be positive.

The concentration cell [tex]E_{Cell} = \dfrac{-0.0591}{1} log \dfrac{0.02}{4}[/tex]

[tex]E_{Cell} =0.136 V[/tex]

         = 136 mV

Answer:

Explanation:

Alpha particles,

Answer:

B

Explanation:

The solubility depends on the ksp. As the value of ksp increases the compound becomes more and more soluble.

In the options, the highest ksp value is 10^-10, thus that one is the most soluble.

Answer:

True

Explanation:

Answer:No, the Cell Membrane does I'm pretty sure

Explanation:

Answer:

ω-3 fatty acid and 19:4(Δ5,8,11,14)

Explanation:

From the image attached below:

We can see the structure of the delta nomenclature showing the numbers of carbons, numbers of double bonds, and the locations of the double bonds in the structure of the carboxylate salt.

Also, we can see the structure of the fatty acid where; the location of the first double bond from the methyl end is shown.

Hence, the designation which are accurate for these structures are:

ω-3 fatty acid and 19:4(Δ5,8,11,14)

Answer:

6.761 × 10⁴ g

Explanation:

Step 1: Write the balanced combustion reaction

2 C₂H₂ + 5 O₂ ⇒ 4 CO₂ + 2 H₂O

Step 2: Calculate the moles corresponding to 20000 g of C₂H₂

The molar mass of C₂H₂ is 26.038 g/mol.

20000 g × 1 mol/26.038 g = 768.11 mol

Step 3: Calculate the moles of CO₂ produced from 768.11 moles of C₂H₂

The molar ratio of C₂H₂ to CO₂ is 2:4.

768.11 mol C₂H₂ ×  4 mol CO₂/2 mol C₂H₂ = 1536.2 mol CO₂

Step 4: Calculate the mass corresponding to 1536.2 moles of CO₂

The molar mass of CO₂ is 44.01 g/mol.

1536.2 mol × 44.01 g/mol = 6.761 × 10⁴ g

Explanation:

this is the answer of your question .

hope it helped you

Answer: first you have to calculate the amount ionized. We will say it is x mol / L

then % ionization = (amount ionized / initial concentration) * 100%

x can be calculated using an ice chart

HC3H5O2           -----> H+    + C3H5O2-

Initial HC3H5O2 = 0.250  

change              = -x

equilibrium         = 0.250 - x

initial H+            = 0

change              = +x

equilibrium         = x

C3H5O2- initial   = 0

change              = +x

equilibrium         = x

Ka         = [H=][C3H5O2-] / HC3H5O2]

 1.3 * 10 ^ -5    = [x][x] / (0.250 - x)  

So 1.3 * 10 ^ -5 * (0.250 - x)   = x ^ 2  

     3.25 * 10^ -6 - (1.3 * 10^-5)x = x^2   now this is a quadratic equation and you have to rearrange it and solve for x

x^2 + 1.3 * 10^-5)x - 3.25 * 10^ -6 = 0

use the equation x = {-b (+ or -)[b^2 - 4.a.c] ^ 1/2} / 2a

you should get x = 1.80 * 10 ^ -3 or x = -1.80* 10^-3

but x can not be negative..

so x = 1.80 * 10 ^ -3

so percent ionization = (1.80 * 10 ^ -3 / 0.250) * 100%

                               =0.72 %

the other way which is more easier is  

assuming that x is very small and therefore 0.250 - x is approximately equals to 0.250  

then 1.3 * 10^-5 = x^2 / 0.250

so x^2    = 1.3 * 10^-5 * 0.250

        x   = 1.80 * 10 ^-3

then percent ionization is = (1.80 * 10 ^ -3 / 0.250) * 100%

                               =0.72 %

if the percent ionization is > 5 % you can not do that approximation. in such a case you have to solve the quadratic equation. that is why I showed both methods.

now you can do the parts b and c

b answer : percent ionization = 1.27 %  

c answer : 2.54%

good luck