What color are the stars on the diagram with the highest surface temperatures?
Answers
Answer: surface temperature
Explanation:
Related Questions
Can the process of rusting be called combustion?
Answers
Answer:
no the answer is oxidation
If an atom has a diameter of 395 pm,
what is its radius?
Answers
Answer:
197.5pm
Explanation:
Given parameters:
Diameter of the atom = 395pm
Unknown:
Radius of the atom =?
Solution:
Radius is the half of diameter;
Radius = [tex]\frac{diameter}{2}[/tex]
Radius = [tex]\frac{395}{2}[/tex] = 197.5pm
What is the volume of a 25 g object with a density of 9.1 g/mL? please help me
Answers
Answer:
The answer is 2.75 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question we have
[tex]volume = \frac{25}{9.1} \\ = 2.747252...[/tex]
We have the final answer as
2.75 mLHope this helps you
According to the periodic table, the neutral atom of what element has 4
protons, 5 neutrons, and 4 electrons?
Answers
Answer:
Beryllium
Explanation:
Given parameters:
Number of protons = 4
Number of neutrons = 5
Number of electrons = 4
Unknown:
Element = ?
Solution:
To determine an element, the atomic number is the most important identifier.
The atomic number is the number of protons in an atom.
Since the atom here has a proton number of 4, checking on the periodic table, it is Beryllium, Be
12.
Contrast and compare:
a) ionic and covalent bonding
Answers
Answer:
Ionic bonds - an intramolecular force exist in a nonmetal and metal compounds such as NaCl. The Na donate 1 electon to Cl to complete its octet rule.
Covalent bond - an intramolecular force exist in a nonmetal and nonmetal compounds such as bonds O2, Cl2, CO2, sugar, proteins and most of organic compounds and biomolecules by sharing electrons to bond.
There are two types of covalent bonds: polar and nonpolar. Polar bond is a bond between two different nonmetal atoms of different electronegativities. While nonpolar bond is a bond between the same atom or two differenct atoms of the same electronegativities (if there is). Their electronegativities pull will cancel so that their overall polarity is zero.
What causes rain to precipitate from clouds?
Answers
Answer: Precipitation forms in the clouds when water vapor condenses into bigger and bigger droplets of water. When the drops are heavy enough, they fall to the Earth.
Explanation: Have a blessed day!
Answer: Precipitation forms in the clouds when water vapor condenses into bigger and bigger droplets of water. When the drops are heavy enough, they fall to the Earth.
Explanation:hope this helps u
SOMEONE HELP ME PLEASE ILL GIVE BRAINLY!
Is the following picture an example of a chemical change or a physical change?
A chemical change, because the atoms are rearranging to form new molecules.
A physical change, because the molecules are staying the same.
A chemical change, because the molecules are staying the same.
A physical change, because the atoms are rearranging to form new molecules.
Answers
Answer:
It would be a physical change, because the atoms are rerranging to form new molecules!
Explanation:
Which is more electrically negative? 1)C 2)P or 3)S
GUYS PLEASE HELP!!! :((
Answers
Answer:
3 sulphur is more electrically –
The table gives the solubility of each substance in 100
g water at 20°C. Use the drop-down menus to rate the solubility of each substance from greatest (1) to least
(4).
Calcium chloride
Calcium bromide
Calcium carbonate
Calcium bicarbonate
Answers
Answer:
2 1 4 3
Explanation:
Polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore the order of solubility is calcium bromide> calcium chloride>calcium bicarbonate>calcium carbonate.
What is solubility?Solubility shows the extent of solubility of a solute in solvent to make a solution. Solute is substances that is present in small amount. solvent is a substance that is present in large amount. Its SI unit is gram per liter or g/L.
Bond strength affect the solubility of a solute in solvent. weaker the bond strength is, more the solubility is. The weaker bond can be easily broken by water molecule
Calcium bromide is more soluble than calcium chloride as the bond strength in calcium bromide is weaker than calcium chloride. Calcium bicarbonate is more soluble than calcium carbonate.
Therefore the order of solubility is calcium bromide> calcium chloride>calcium bicarbonate>calcium carbonate.
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Benzoic acid, C6H5COOH, is another derivative of benzene. The pH of an aqueous solution of benzoic acid at 298 K is 2.95. Determine the concentration of hydroxide ions in the solution,
Answers
Answer:
[OH⁻] = 8.91x10⁻¹²M
Explanation:
In aqueous solutions, the [OH] and [H⁺] are associated in the equation of hydrolisis of water:
1x10⁻¹⁴ = [OH⁻] [H⁺]
With pH, we can solve for [H⁺] and obtain, the [OH⁻] using this equation:
pH = -log [H⁺]
[H⁺]= 10^-pH
[H⁺] = 1.122x10⁻³M
1x10⁻¹⁴ = [OH⁻] [1.122x10⁻³M]
[OH⁻] = 8.91x10⁻¹²MUnder a certain set of conditions, the percent yield of a reaction that produces carbon dioxide is 75.0%. What mass in grams of CO2 will actually be recovered if the theoretical yield is 26.7 grams?
Answers
Answer:
Actual yield = 20.03g
Explanation:
[tex]% yield = 100.\frac{actual yield}{theoretical yield}[/tex]% [tex]yield[/tex] = [tex]100. \frac{actual \ yield}{theoretical \ yield}[/tex]
Actual yield = % yield.(theoretical yield) / 100
Actual yield = 75.26.7/100
Actual yield = 20.025
Answer: I got 20.025 and then I rounded it to 20.0
Explanation:
PLEASE HELP!!!!!!!!
Step 4: Create Lewis dot diagrams.
a) Draw Lewis dot diagrams of the reactants and products on the paper with your chemical equation.
b) Select a different color to use for each element in the chemical reaction. Use your chosen color
for the element’s symbol and for its valence electrons.
c) Label these diagrams “Lewis Dot Diagrams.”
Answers
Answer:
Hey student your question is not proper arrange, i don't understand what you want us to do
In your own words, please explain how to name acids.
Answers
Answer:
Acids are named based on their anion — the ion attached to the hydrogen. In simple binary acids, one ion is attached to hydrogen. Names for such acids consist of the prefix “hydro-“, the first syllable of the anion, and the suffix “-ic”. Complex acid compounds have oxygen in them.
If all objects masses are the same, then the object with the least ___ is the densest?
Possible Answers:
A: Mass
B: Volume
C: Weight
D: Density
Answers
Answer:
its weight
Explanation:
mass is how much space it takes up the volume stays the same density is what happens after so its weight
what does the atomic mass number of each atom represent.
Answers
The atomic mass number tells us the number of neutrons and protons in the nucleus of an atom.
why burning of wood and cutting it into small pieces are considered as two different types
of changes.in sort type
.
اور بس انتي شلال
Answers
Answer:
burning causes pollution cutting results furniture
Explanation:
are u a nepali ?
Answer:
burning of wood, new substances are formed and hence it is a chemical change. While cutting the wood into small pieces no new substance is formed, thus it is a physical change. Hence, burning of wood and cutting it into small pieces are considered as two different types of changes.
I WILLL GIVE YOU BRAINLYESTTT PLEASE HELPPPP
Answers
Answer:
10.99s
Explanation:
Given parameters:
Speed of the fly = 9.1m/s
Distance flown = 100m
Unknown:
Time taken to fly this distance = ?
Solution:
Speed is distance divided by the time;
Mathematically;
Speed = [tex]\frac{distance}{time}[/tex]
Time = [tex]\frac{distance}{speed }[/tex]
Insert the parameters and solve;
Time = [tex]\frac{100}{9.1}[/tex] = 10.99s
The sum of the protons and neutrons in an atom equals the?
nucleus number
atomic number
atomic mass
mass number
Answers
Answer:
mass number
Explanation:
The sum of the protons and neutrons in an atom equals the mass number of such an atom.
Mass number is the mass of an atom. The mass of an atom is concentrated in the nucleusThe particles in the nucleus are the protons and neutrons.So;
Mass number = number of protons + number of neutrons.
Geologic Time Scale
Time Period Duration (Millions of Years Ago)
Cenozoic 66-0
Mesozoic 252-66
Paleozoic 541-252
According to the scale, what time period are we in today?
a
Cenozoic
b
Mesozoic
c
Paleozoic
d
None of these
Answers
1.Which statement(s) is/are true about a divergent plate boundary? Check all that apply.
A.new crust is created here
B.an ocean trench is found here
C.a rift valley is associated with this boundary
D.subduction occurs at this boundary
E.a mid-ocean ridge is found at this boundary
F.San Andreas is an example of this type of boundary
G.sea floor spreading occurs here
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2.Which statement(s) is/are true about a transform plate boundary? Check all that apply.
A.an ocean trench is found here
B.earthquakes frequent this boundary
C.subduction occurs at this boundary
D.two plates are sliding past each other
E.San Andreas is an example of this type of boundary
F.an ocean trench is found here
--------------------------------------------------------------------------------------------------------------------------------
3.Which statement(s) is/are true about a convergent plate boundary? Check all that apply.
an ocean trench is found here
a rift valley is associated with this boundary
subduction occurs at this boundary
volcanic island chain might occur here
folded mountains might form here
earthquakes might occur here
San Andreas is an example of this type of boundary
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SINCE THIS IS ALOT OF THINKING I AM GIVING A GOOD AMOUT OF POINTS.....
PLEASE DONT SCAM AND STEAL THE POINTS
Answers
Answer:
I know the first one is c or e but i not sure what the others are, the second one is- wait are you sure your in 6th grade lol? I dont remember learning this
Answer:
OMG ITS MEHH
Explanation:
how can you test a sample of soil for acidity or alkalinity
Answers
Answer:
Scoop a soil sample into a fresh container, add 1/2 cup of water, and mix. Then, add 1/2 cup of baking soda. If the soil bubbles or fizzes, the soil is acidic. The reaction you're seeing is the result of acidic soil coming into contact with an alkaline substance (baking soda).
Explanation:
Hope this helped!
A wave is a _____that transfers _____ through a ______
A.) medium, disturbance, energy
B.) disturbance, energy, medium
C.) energy, disturbance, medium
D.)disturbance, medium, energy
Answers
A wave is a disturbance that transfers energy through a medium. There
are types of such as sound and light waves.
A wave involves the transfer of energy such as sound, light waves etc
through a medium. The medium could be through liquids , solids or air and
they have characteristic waves which pass through them.
When a wave transfers energy through a medium, the matter involved
doesn't experience any type of movement.
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(Need Help ASAP) 23.5 grams of iron(III) oxide (Fe2O3) are reacted with excess carbon. What is the theoretical yield of iron metal?
2 Fe2O3 + 3 C --> 4 Fe + 3 CO2
Answers
The theoretical yield of iron metal : 16.418 g
Further explanationA 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
2 Fe₂O₃ + 3 C ⇒ 4 Fe + 3 CO₂
mol Fe₂O₃ (MW=159,69 g/mol) :
[tex]\tt \dfrac{23.5}{159.69}=0.147[/tex]
mol Fe₂O₃ : mol Fe = 2 : 4
mol Fe :
[tex]\tt \dfrac{4}{2}\times 0.147=0.294[/tex]
mass Fe(the theoretical yield) :
[tex]\tt 0.294\times 55.845~g/mol=16.418~g[/tex]
Answer:
The correct answer with signfigs is 16.4 for the first part
The second box is 88.4
Explanation:
A bus travels a distance 150km
in 5 hours where as another bus travel 200km in
6 hours which bus travel fast
Answers
Answer: The bus traveling 200km in 6 hours is traveling the fastest.
Explanation:
Bus 1
150km/5hrs
Simplify -> 30km/hr
Bus 2
200km/6hrs
Simplify -> About 33.333km/hr
Why are flowers brightly colored?
Answers
Answer: In order to help the plants reproduce, flowers that are bright in color are meant to attract birds, bees and other insects. In the genetics of a flower, bright or dull colors are set in
Explanation:
Potato strips placed in a container of concentrated salt water will ultimately __.
Answers
Answer:
00000
Explanation:
What igneous rock is non-vesicular and glassy in texture and has a mafic composition?
Answers
Answer:
igneous rock
Explanation:
A very hot cube of copper metal (32.5 g) is submerged into 105.3 g of water at 15.4 0C and it reach a thermal equilibrium of 17.3 0 Calculate the initial temperature of copper (Cs = 0.385 J/g 0C for copper, and 4.18 J/g 0C for water).
Answers
Answer:
The initial temperature of the metal is 84.149 °C.
Explanation:
The heat lost by the metal will be equivalent to the heat gain by the water.
- (msΔT)metal = (msΔT)water
-32.5 grams × 0.365 J/g°C × ΔT = 105.3 grams × 4.18 J/g °C × (17.3 -15.4)°C
-ΔT = 836.29/12.51 °C
-ΔT = 66.89 °C
-(T final - T initial) = 66.89 °C
T initial = 66.89 °C + T final
T initial = 66.89 °C + 17.3 °C
T initial = 84.149 °C.
how do i do the chemicals
Answers
you have to put them togeter
helppppp. which of the following statements regarding physical and chemical changes is true? a. both physical and chemical changes alter the atomic structure of a substance. b. neither physical not chemical changes alter the atomic structure of a substance. c. physical changes alter the atomic structure of a substance, while chemical changes do not. d. chemical alter the atomic structure of a substance, while physical changes do not. huryyyy
Answers
Answer:
B
Explanation:
I did it
Neither physical not chemical changes alter the atomic structure of a substance. The correct option is b.
What are chemical changes?When one chemical substance is transformed into one or more different substances, such as when iron becomes rust, a chemical change occurs.
Chemical changes occur as a result of chemical reactions, and the resulting substances have different properties due to the different arrangements of their atoms and molecules.
Physical changes affect a chemical substance's form but not its chemical composition.
Physical changes can be used to separate mixtures into their component compounds, but not to separate compounds into chemical elements or simpler compounds.
Physical or chemical changes have no effect on a substance's atomic structure.
Thus, the correct option is b.
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