What volume of 0.123 m naoh, in milliliters, contains 25.0 g of naoh?


Answer 1
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Related Questions


How many electrons does each oxygen atom gain during the course of this reaction?


The chemical reaction is the oxidation of calcium metal by molecular oxygen. During the reaction, calcium metal is oxidized, that is, loses electrons and oxygen is reduced, that is gains electrons.
During the reaction, the calcium atom donate two electrons in order to become stable and the oxygen atom accepts these two electrons. Therefore, during the reaction, EACH OXYGEN ATOM GAINS TWO ELECTRONS.

The rate constant for a reaction is measured as a function of time. A plot is created by graphing ln(k) on the y-axis and 1/T on the x-axis, and a best fit line with a slope of -10,473 K is obtained. Based on this data what is the activation energy of this reaction (in kJ/mol)?


The  activation energy of this reaction (in kJ/mol) should be  1.2596 kJ/mol

Calculation of activation energy:

In terms of chemistry, the minimum amount of energy i.e. needed to activate the atoms or molecules with a condition in which they can undergo a chemical transformation.

Here we considered the natural logarithm of the former equation.

ln k = ln A - Ea/R (1/T)


k is  rate constant

A is  pre-exponential factor

Ea is activation energy

R is  ideal gas constant

T is absolute temperature


In the plot of ln k vs. 1/T, the slope is -Ea/R.


-10,473 K = -Ea/R

10,473 K = Ea/8.3145 J/mol.K

Ea = 1259.6 J/mol

learn more about the energy here:


1.2596 kJ/mol


Let's consider the Arrhenius equation.


k: rate constant

A: pre-exponential factor

Ea: activation energy

R: ideal gas constant

T: absolute temperature

We can take the natural logarithm of the former equation.

ln k = ln A - Ea/R (1/T)

In the plot of ln k vs. 1/T, the slope is -Ea/R. Then,

-10,473 K = -Ea/R

10,473 K = Ea/8.3145 J/mol.K

Ea = 1259.6 J/mol = 1.2596 kJ/mol


PLEASE ANSWER Which of the following statements about electromagnetic and mechanical waves is true?

A. Electromagnetic waves must travel through a medium, but mechanical waves do not require a medium.

B. Mechanical waves must travel through a medium, but electromagnetic waves do not require a medium.

C. Mechanical waves sometimes travel through a vacuum, and electromagnetic waves sometimes travel through matter.

D. Electromagnetic waves travel mostly through matter, and mechanical waves travel mostly through a vacuum.



B) Mechanical waves must travel through a medium, electromagnetic waves do not require a medium.


1). Mechanical waves:A mechanical wave is a wave that propagates through a material medium.As the wave travels through the medium,the particles that make up the medium must undergo displacements of various kinds, depending on the nature of the waves.They are of two types: a)Transverse wave

b)Longitudinal wave

a). Transverse waves:In transverse waves,the particle displacement is perpendicular to the direction of the wave propagation.This particles do not move along with the wave,they simply oscillate up and down about the individual position as the wave passes by.E.g,waves produced on a string.

b). Longitudinal waves:In a longitudinal wave,the particle displacement is parallel to the direction of the wave propagation.The particle oscillate back and forth about their equilibrium position.E.g, Sound wave in a gas.

2). Electromagnetic waves:This is a type of wave that require a physical medium for propagation and hence can travel through a vacuum.E.g,Light waves.

The answer is B because mechanical waves require an elastic/flexible medium to transmit the energy while electromagnetic waves don’t require a medium

What is an ion and what is an cation


Ion - an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Cation - a positively charged ion.

Consider the reaction below 2SO2(g) + O2(g) ⇌ 2SO3(g) At 1000 K the equilibrium pressures of the three gases in one mixture were found to be 0.562 atm SO2, 0.101 atm O2, and 0.332 atm SO3. Calculate the value of Kp for the reaction.


Answer: for the reaction is 3.45


The balanced chemical reaction is:


At eqm.   0.562 atm   0.101 atm    0.332 atm

As we are given that:

The expression of for above equation follows:

Putting values in above equation, we get:

The value of for the reaction is 3.45


In the following reaction, how many grams of nitroglycerin C3H5(NO3)3 will decompose to give 25 grams of CO2? 4C3H5(NO3)3(l) 12CO2(g) + 6N2(g) + 10H2O(g) + O2(g) The molar mass of nitroglycerin is 227.0995 grams and that of carbon dioxide is 44.01 grams.


Answer : The mass of nitroglycerin will be, 43.15 grams

Explanation :

First we have to calculate the moles of

Now we have to calculate the moles of nitroglycerin.

The balanced chemical reaction is,

From the balanced reaction we conclude that

As, 12 moles of obtained from 4 mole of

So, 0.57 moles of obtained from mole of

Now we have to calculate the mass of nitroglycerin.

Therefore, the mass of nitroglycerin will be, 43.15 grams

43.00 grams I'm pretty sure

Think about your house, condo or apartment. What part of your home would be like the mitochondria of the cell? Why?reproduction all living things need cells


in our cell, mithocondria provide the energy required for the cells to do their daily actiivities. If it's compared to the parts in our home, i think it would be the electric box. The electric box acted as a source of power for the house to run its TV, Lamp, heater, basically almost everything Hope this helps. Let me know if you need additional help!

What is the atomic weight of an element if 4 grams of it contains 2.98 x 10^22 atoms?


M = 4 g;  N = 2.98 * 10^22
Avogadro constant:  L = 6.022 * 10^23
Number of moles:
n = 2.98 * 10^22  : 6.022 * 10^23 = 0.298 * 10^23 : 6.022 * 10^23 =
= 0.0495 moles
Molar mass:
M = m/n = 4 g / 0.0495 = 80.8 ≈ 80  
N=amount  in moles
N=amount in numbers=2.98x10^22
L=Avagadro's constant=mole-1(6.022x10^23)
m= mass in grams
M=molar mass in g/mol
  =0.0495 mol ≈0.05 mol
   =80 g/mol
The element is Br

True or false the first species to colonize newly exposed land are called primary species?


True, the first species to colonize newly exposed land are called primary species
The answer is true .........
Random Questions
Determine if the answers to the following questions are correct: 1. What is the best method to learn CPR? A: You should take an accredited first-aid training course that includes CPR and also how to use an AED. 2. Identify the CAB’s of CPR, AND describe the meaning of each letter below in a complete sentence. C – C stands for circulation; to restore blood circulation with chest compressions. A – Airway is what A stands for and it means to clear the airway. B – B stands for breathing for the person. 3. Identify 4 differences in administering CPR to a child (ages 1-8 years) rather than for an adult. a. You only use one hand when performing heart compressions on a child. b. When you perform CPR on a child, you have to breathe gently. c. Before calling 911 or using and AED, you must first perform five cycles of breathing and compressions for about two minutes. d. If after five cycles of CPR the child doesn’t respond, apply and follow the prompts of an AED. 4. The most common cause of cardiac arrest in infants is due to the lack of oxygen. What are the two most common causes of lack of oxygen in infants? a. Drowning b. Choking 5. How do the rescue efforts differ when rescuing a baby if you are the only rescuer or if there is an additional rescuer? A. If you are the only rescuer, do five cycles of CPR, and then call 911. B. Have the other person who is with you call for help while you attend to the baby. 6. How does breathing for a baby differ from that of an adult or child? Instead of using deep breaths from your lungs, you use the strength of your cheeks to give them gentle puffs of air, in order to slowly breathe into the baby’s mouth one time, and then take a breath and continue.