Answer:
24g÷8g/ml=3
volume =3
How many moles of NaOH are in a 75.89g sample? (mass= 40.01 g) (Show your work)
Answer:
1.896 moles of NaOH-----> 1.90 moles
Explanation:
Written- out Method:75.89 g of NaOH | 1 mole of NaOH
| 40.01 g NaOH = 1.896 -----> 1.90 moles of NaOH
Plug into calculator method:(75.89 g NaOH/ 40.01 g NaOH = 1.896 -----> 1.90 moles of NaOH
Mark is pushing a box down the hall. Mark is using 5N to push the box 20m. How much work is Mark doing?
The work by Mark : 100 J
Further explanationWork is the transfer of energy caused by the force acting on a moving object
Work is the product of force with the displacement of objects.
Can be formulated
[tex]\tt W=F\times d[/tex]
W = Work, J, Nm
F = Force, N
d = distance, m
Mark is using 5N to push the box 20 m,
F = 5 N
d = 20 m
[tex]\tt W=5\times 20\\\\W=100~J[/tex]
How is Mass converted to the energy released in the fire
Answer:
The heat and light released by fire comes from the breaking of chemical bonds. ... The mass of each molecule, before burning, exceeds the total mass of its atoms by a tiny amount that is equivalent (through E=mc²) to the total energy of all its atomic bonds.
Explanation:
I hope this helps (:
Metamorphic means “________________.”
A}to turn into rock
B]to make into minerals
C]to change form
D]to press down
In Greek metamorphic means 'to change form ' . Hence the answer to this question will be ;
C) To change form
i need help ASAP ! Please
Answer:
Your friend gave the better response
Explanation:
Formula for density:
Density = mass/volume
p = m/v
Let's substitute the given values into the equation:
p = m/v
p = 23.2/8.593
Solve:
p = 23.2/8.593
p = 2.69987198883
2.69987198883 grams per volume
Notice that 2.69987198883 is the exact answer. Your answer is 2.67, which is inaccurate, even if rounded. If you were to round the exact answer to the nearest hundredth, it would be 2.70 which is not 2.67.
Therefore, your friend gave the better response because it is the correct answer.
density equals mass over volume
23.2/8.593 = 2.69 g/mL
Science investigation skills
Is carbon a metal or a nonmetal? How many valence electrons does a carbon atom have?
Answer:
Carbon is a solid non-metal element. Carbon has eight valence electrons.
Explanation:
Hope this helps!!
there are 20 _______ amino acids (9)
(fill in the blank)
Answer: different
Explanation: There are 20 different amino acids.
what is the central dogma of biology? QUICK PLEASE
Answer:
The central dogma states that the pattern of information that occurs most frequently in our cells is: From existing DNA to make new DNA (DNA replication?) From DNA to make new RNA (transcription) From RNA to make new proteins (translation).
Explanation:
What is a catchy title for a science project on crystals?
Answer:
Crystal Clear Thinking
A Crystal Clear Idea
Crystals -The Diamond Wannabes of the World
Crystal Clear
Crystal Cool!
A New World ~ made Crystal Clear for You
The Science Behind The Shine
Crystal-ology
Classy Glass
Explanation:
Hope this helps and good luck with your project!
Someone help me plz.
In each of the following pairs, circle the form of radiation with the LONGER WAVELENGTH:
A. red light or blue light
B. microwaves or radiowaves
C. infrared radiation or red light
D. gamma rays or UV rays
Answer:
In the first one in a it is red light in b it is radio waves in c it is infrared radiation and d is UV radiation
Explanation:
The forms of radiation from the pairs listed that have longer wavelength are :
A) Red light
B) Radio waves
C) Infrared radiation
D) UV rays
Red light have a wavelength between 650 to 720 nm while a Blue light has a wavelength of 380nm to 500nm which makes it to produce a high energy visible light.( HEV ) light. therefore the Red light has a longer wavelength.
The wavelength of a microwave is approximately 30 centimeters to 1 millimeter, which makes it shorter than the wavelength of a radio wave ( shortest wavelength in the electromagnetic spectrum.
Hence we can conclude that The forms of radiation from the pairs listed that have longer wavelength are A) Red light B) Radio waves C) Infrared radiation D) UV rays
Learn more about the electromagnetic spectrum : https://brainly.com/question/4533497
Examples of physical change include?
A. Melting
B. Boiling
C. Freezing
D. All of these are examples of physical change
Answer:
All of these examples are physical changes.
Explanation:
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.
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
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.
Using the table on the right, perform the following metric unit conversions. Type your answer in the space provided.
0.001087 kg =
g
Answer:
1.087g
Explanation:
you can use the reminder King Henry Died By Drinking Chocolate Milk. You wanna that the period and move it right 3 times till you get to by.
Answer:
The first answer is 0.001087 kg = 1.087 g
The second answer is 25 mL = 0.025 L
Then the third answer is 531 ms = 0.531 s
Which unit is not a measurement of volume?
cm^3
Ocm
Oml
OL
Answer:
cm is a measure of length not volume
Answer:
I think it's Cm:)
Hope this helps
For the n = 3 electron shell, which of the following quantum numbers are valid? Check all that apply.
Answer:
The valid quantum numbers are l=0, l=-2 and l= 2.
Explanation:
Given that,
n = 3 electron shell
Suppose, the valid quantum numbers are
l = 3
m = 3
l = 0
m = –2
l = –1
m = 2
We know that,
The value of n = 3
Principle quantum number :
Then the principal quantum number is 3. Which is shows the M shell.
So, n = 3
Azimuthal quantum number :
The azimuthal quantum number is l.
[tex]l=0,1,2[/tex]
Magnetic quantum number :
The magnetic quantum number is
[tex]m=-2,-1,0,1,2[/tex]
Hence, The valid quantum numbers are l=0, l=-2 and l= 2.
Answer: I = 0 m = -2 m = 2
Explanation: Edge.
the correct answers to the second part of this are:
n = 1, I = 0, m = 0
n = 3, I = 0, m = 0
n = 5, I = 4, m = -3
Bonus question #2: Unknown element, Element X, exists in nature as two isotopes:
^{351}
351
X has a mass of 350.9196 u and
^{353}
353
X has a mass of 352.9209 u. The average atomic mass of Element X is 351.96 u. Calculate the relative abundance of the two Element X isotopes.
Answer:
Explanation:
your answer is 351.96 i not a 100 per sent right but that should be it
In dilute aqueous solution, as [H+] increases:
A. pH decreases
B. pOH increases
C. [OH-] decreases
Answer:
B
Explanation:
The answer is B, I hope this helps you!
I WILL GIVE YOU BRAINLIEST HELP ME!!!
Answer:
It is the first one
Explanation:
Due to the fact that political discretion would be so only a few or a group of indviduals could control or know certain things
Answer: yeah is the first one
Explanation:
Which of the following is the unit of measurement used to describe the severity of an earthquake?
Answer:
Try magnitude.
Explanation:
Answer:
The Richter scale measures the largest wiggle (amplitude)
Explanation:
The Richter scale measures the largest wiggle (amplitude) on the recording, but other magnitude scales measure different parts of the earthquake. ... Intensity is a measure of the shaking and damage caused by the earthquake; this value changes from location to location.
which solution is most likely to conduct electricity when it is dissolved in water?
a)CH3OH
b)C6H12O6
c)SrCl2
d)NH3
Explanation:
Glucose (C₆H₁₂O₆) is an electrolytes hence it conduct electricity.
Therefore,
Option B is correct.
does this picture show a physical or chemical change?
Answer:
Those photos are a chemical change
Based on your data, how are elements arranged into chemical families?
Answer:
Based on their groups
Explanation:
Answer:
They are arranged vertically depending on how many valence electrons they have, if they have the same amount, they will have the same chemical family in each column.
How would you describe the conditions in the lower mantle?
Answer:
hi..
Explanation:
The lower mantle is hotter and denser than the upper mantle and transition zone. The lower mantle is much less ductile than the upper mantle and transition zone. Although heat usually correspond s to softening rocks, intense pressure keeps the lower mantle solid. Geologists do not agree about the structure of the lower mantle.
hope this helps ._.
very hot at temperatures, i think i would set it to 43 degrees celsius as its much colder and better
hope this helps!
Why can astronauts jump so high, and "hang" so
long, on the moon?
gravity is stronger on the earth, and gravity is what brings you back down
so, if there's less gravity, then there's more air time
Answer:
Low gravity
Explanation:
The moon has lower gravity than Earth, therefor when someone jumps, they will not return to the surface automatically.
List three organelles found in cells and describe their functions.
nucleus: controls cell
cell membrane: controls what goes in and out of a cell
cytoplasm: where chemical reactions take place
Answer:
Nucleus: DNA Storage
Mitochondrion Energy production
smooth Endoplasmic Reticulum (SER) Lipid production; Detoxification
A student found a 500 cm3 sample of vinegar. Knowing that vinegar is a solution of ethanoic acid (CH3COOH) and water, this student decided to take a 25.0 cm3 sample, dilute it with 25.0 cm3 of water and then react it with sodium hydroxide. The dilute sample required 37.0 cm3 of 0.850 mol dm–3 sodium hydroxide solution to react entirely with it via the following reaction:
CH3COOH(aq) + NaOH(aq) → NaCH3COO(aq) + H2O(l)
Calculate the concentration of ethanoic acid in the original sample of vinegar.
Answer:
1.26mol/dm3
Explanation:
What is the atmoic number for potassium?
Answer:
19
Explanation:
it is 19 for potassium
whats the volume of a 2 year old
Answer:
here's a great idea!
take a jug of water by finding the volume of that water and ask the 2 year old to chug it all in... the volume of water drank by the 2 year old is the volume of the two year old
Using the em figure what color is the wavelength 436 nm
Answer:
Blue
Explanation: