Answers
pretty sure it's both are physical changes.
Answer:
I would say Both are only physical changes.
Explanation:
Melting wax isn't creating a new substance, or changing the atomic structure. The wax is only changes from a solid to a liquid state. Sanding a piece if wood is usually done with sandpaper, which can physically be done with your hands. Hope this helped :)
Related Questions
Hello can someone help me out i will give brainliest.. chemical or physical change hwwwww
Answers
Answer:
11. physical
19. chemical
10. chemical
12. physical
18. chemical
Explanation:
that should be right, I'm not exactly sure though
what is an autograph that transfers energy from the sun to make its own food?
Answers
Answer:
Photoautotrophs
Explanation:
I think you mean "autotroph"
The answer is photoautotrophs. they use sunlight to make their food
Don't forget to rate the answer for others
One of the light waves produced when hydrogen is energized has a wavelength of 4.105 x10^-7 m. What is the frequency of this light?
Answers
Answer:
7.3 x 10¹⁴Hz
Explanation:
Given parameters:
Wavelength = 4.105 x 10⁻⁷m
Unknown:
Frequency of the light =?
Solution:
The frequency, wavelength and speed of a wave are related using the expression below;
C = f λ
C is the speed of light = 3 x 10⁸
f is the frequency
λ is the wavelength
3 x 10⁸ = f x 4.105 x 10⁻⁷
f = [tex]\frac{3 x 10^{8} }{4.105 x 10^{-7} }[/tex] = 7.3 x 10¹⁴Hz
Answer:
7.3 x 10¹⁴Hz
Explanation:
How do you think the atomic radii will change as electrons are added to a shell?
Answers
Answer:
As electrons are added to the valence shell, an extra proton (i.e fundamental, positively charged nuclear particle) is added to the element's nucleus. As electrons add and Z the atomic number increases 1 by 1, nuclear charge WINS, and electronic radii contract.
Explanation:
Hope this helps you
Crown me as brainliest:)
Of the three states of water(ice,liquid, and water vapor), in which state are the intermolecular forces the strongest? In which state are they the weakest
Answers
What is the electric force acting between two charges of 0.0042 C and -0.0050 C that are 0.0030 m apart?
Answers
Answer: -2.1 x 10^10 N
Explanation:
How many moles are in 35.0g of sodium (Na).
Answers
Answer:
2.5 I don't have a explanation
!PLEASE HELP ASAP!
How many grams of aluminum can be produced by decomposing 12.3 grams of aluminum
oxide?
Answers
calculate the wavelength of a photon of green light that has a frequency (v) of 5.76x10^14 s^-1
Answers
Answer:
λ = 521nm
Explanation:
To convert wavelength to frequency we need to use the equation:
ν = c / λ
Where ν is frequency: 5.76x10¹⁴s⁻¹;
c is speed of light: 3x10⁸ms⁻¹;
And λ is wavelength in m:
Wavelength is:
λ = c / ν
λ = 3x10⁸ms⁻¹ / 5.76x10¹⁴s⁻¹
λ = 5.21x10⁻⁷m
= 521nm
The wavelength of a photon of green light that has a frequency (v) of 5.76x10¹⁴ s-¹ is 5.21 × 10-⁷m
HOW TO CALCULATE WAVELENGTH:
The wavelength of a photon can be calculated by using the formula below:λ = v/f
Where;
λ = wavelength of the photon (m)v = velocity (3 × 10⁸ m/s)v = frequency of photon (s-¹)According to this question, the frequency (v) of a greenlight is 5.76x10¹⁴ s-¹, the wavelength can be calculated as follows:λ = 3 × 10⁸ ÷ 5.76 x 10¹⁴
λ = 3/5.76 × 10⁸-¹⁴
λ = 0.521 × 10-⁶
λ = 5.21 × 10-⁷m
Therefore, the wavelength of a photon of green light that has a frequency (v) of 5.76x10¹⁴ s-¹ is 5.21 × 10-⁷m.Learn more at: https://brainly.com/question/19601903?referrer=searchResults
Describe the structure of sodium metal?
Answers
Answer:
The body-centred cubic (bcc) structure is the most stable form for sodium metal at 298 K (25°C). Under normal conditions, all of the Group 1 (alakali metals) elements are based upon the bcc structure. The closest Na-Na separation is 372 pm implying a sodium metallic radius of 186 pm.
Explanation:
In addition to Earth, which planet has evidence of water on the surface?
(one Answer)Thank you
Mars
Mercury
Neptune
Saturn
Answers
Answer:
mars
Explanation:
just googled it
In addition to Earth, mars planet has evidence of water on the surface.
What are evidence of water?Evidence proves that financing results works Our strong evidence based on the proves that more lives and real can be changed through access to affordable inventing for water and sanitation.
Evidence of finding water on Mars first to be known in 2000, with the appearance of gullies that suggested us about a liquid origin. Their formation has been hotly in debated over the ensuing years.
Therefore, addition to Earth, mars planet has evidence of water on the surface.
Learn more about evidence of water, here:
https://brainly.com/question/3406927
#SPJ6
what is the mass in grams of 0.00125 mole of sodium Na=23
Answers
Answer:
0.03g
Explanation:
Given parameters:
Number of moles of Na = 0.00125mole
Unknown:
Mass in grams of Na = ?
Solution:
To find the mass of this substance, we simply multiply the number of moles with the given molar mass of Na.
Mass of Na = number of moles x molar mass
Mass of Na = 0.00125 x 23 = 0.03g
What pressure (in atm) does 3.54 moles of chlorine gas at 376 K exert on the walls of its 51.2 L container?
Answers
Answer:
2.13 atm
Explanation:
Enter 4 digit code( need help!!)
Answers
Answer:
9146
Explanation:
Answer:
9146
Explanation:
9146
which element below has the highest electronegativity? beryllium, carbon, fluorine, nitrogen
Answers
Answer: fluprine
Hope this help
A student found the percent composition of CO to be 50% C and 50% O. What did the student do Incorrectly? What is the percent composition of CO?
Answers
saturn surface features
Answers
Answer:
Surface pressure: 140 kPa
Surface gravity: 10.44 m/s2 (34.3 ft/s2); 1.065 g
Surface area: : 4.27×1010 km2 (1.65×1010 sq mi
Average orbital speed: 9.68 km/s (6.01 miles/s)
Answer:craters
Explanation:
If a(n) ___
ended question is too challenging, respondents will abandon the survey
Answers
Answer:
Open ended question
Explanation:
Built different :]
Answer:
if an OPEN end question is too challenging respondents will abandon the surevy
Explanation:
What is the molarity of a solution if 5 moles of solute are dissolved in 8 L of solvent.
Answers
Answer:
0.625mol/L
Explanation:
Given parameters:
Number of moles of solute = 5moles
Volume of solvent = 8L
Unknown:
Molarity = ?
Solution:
Molarity is the number of moles of solute per unit volume of solution. It is mathematically expressed as
Molarity = [tex]\frac{number of moles }{Volume}[/tex]
Molarity = [tex]\frac{5}{8}[/tex] = 0.625mol/L
Which of the following is not a correct formula unit for a salt made from main group elements?
Ca0
AIFA
Al2O3
Ca3N2
Answers
Answer:
The correct option is AlFA
Explanation:
There is no element in the periodic table with the symbol of A. Thus, the compound AlFA is wrong and cannot be a salt made from main group elements. CaO is calcium oxide, Al₂O₃ is aluminium oxide and Ca₃N₂ is calcium nitride - all are evidently made from elements from the main groups of the periodic table (except the AlFA)
Magnesium will...
• Gain 2 electrons and become Mg2-
• Lose 2 electrons and become Mg2-
• Gain 2 electrons and become Mg2+
• Lose 2 electrons and become Mg2+
Answers
Answer:
D
Explanation:
magnesium always lose 2 electrons
What is the first example in the periodic table where the Aufbau principle is not followed?
the 3s subshell is lower in energy than the 3d subshell
the 3s subshell is lower in energy than the 2p subshell
the 2s subshell is lower in energy than the 2p subshell
the 4s subshell is lower in energy than the 3d subshell
Answers
Answer:
the 4s subshell is lower in energy than the 3d subshell
Explanation:
In the element number 24 which is chromium
the electronic configuration should be according to Aufbau principle
will be = [tex]1s^22s^22p^63s^23p^64s^23d^4[/tex]
but in reality it is = [tex]1s^22s^22p^63s^23p^64s^13d^5[/tex]
The 6 electrons in the outermost shell will be divided as 5 in 3d subshell and 1 in 4s shell, because half filled orbital [tex]4s^13d^5[/tex] will be more stable than [tex]4s^23d^4[/tex].
WILL GIVE BRAINLIEST
Answers
Answer:
Explanation:
NaClO3
Atomic masses:
Na =23
Cl=35.5
O=16
Molar mass=(23)+(35.5)+(3×16) =106.5g/mol
Use the periodic table to select which type of bond is present and which of the listed properties is most likely for each substance.
A =
B =
Cu3Zn2
O2
Answers
Answer:
A :metallic
B :conducts electricity as a solid
C :covalent
D :does not conduct electricity
Explanation:
Answer:
A = ✔ metallic
B = ✔ conducts electricity as a solid
C = ✔ covalent
D = ✔ does not conduct electricity
Explanation:
edge 2023
What is the density of an object with a mass of 140 g and a volume
of 6 ml
Answers
Answer:
23.33 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{140}{6} = \frac{70}{3} \\ = 23.3333...[/tex]
We have the final answer as
23.33 g/mLHope this helps you
All elements are unstable except the noble gases
True or False
Answers
Answer:
True
Explanation:
Noble gases already have the maximum number of valence electrons they can hold so they are the only stable group
Can someone help me with this?
Answers
Answer:
b
Explanation:
it i b ur welcome
Answer: um sure so 2+4= 24 then 9+7=97
Explanation: bc if you have 2 and you have 4 and if you smash that together you get 24 and 9 and 4 smash that together and you get 94 see so easy
what is the molar mass of ammonium sulfite
Answers
Answer: 116.15 g/mol
Jocelyn and her friends put some raisins, hazelnuts,
almonds, and peanuts in a bowl to make a snack for their
hiking trip. What does this snack represent?
A. a solution
B. a new element
C. a new compound
D. a mixture
plspslsspslpsl help its revision for exam and i need it quick brainliest for the right answer :D
Answers
Answer: a mixture
Explanation:
Which type of energy produces almost no waste or pollution?
A: burning coal
B: nuclear energy
C: solar energy
Answers
Answer:
B: nuclear energy.
Explanation:
It is emission-free and it saves 2.4 billion tons of carbon emissions per year. Also, the level of hazard of nuclear waste does decrease during the time.
Hope that helps!