Answer: Melting or boiling
Explanation:
Melting or boiling point is another property that scientists can use to identify a substance. Melting point is the temperature at which a substance changes from solid → liquid. Boiling point is the temperature at which a substance changes from liquid → gas.
What is the mass, in grams, of 9.01 x 1024 molecules of methanol (CH, OH) ?
Answer:
480.6 g
Explanation:
Given data:
Number of molecules of methanol = 9.01 ×10²⁴
Mass in gram = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
9.01 ×10²⁴molecules ×1 mol /6.022 × 10²³ molecules
1.5 ×10¹ mol
15 mol
Mass in gram:
Mass = number of moles × molar mass
Mass = 15 mol × 32.04 g/mol
Mass = 480.6 g
Identify each of the following types of compounds as Binary Ionic, Ternary Ionic, Binary Acids, or Oxyacids.
1) K2HPO4
2) H2CO3(aq)
3) (NH4)3P
4) Na2O2
5) Hg(NO2)2
6) Al(ClO2)3
Answer:
the words to identify them is them in kaps right
Explanation:
10. Anna wants to measure the water temperature in the pail. What instrument
she needs to use?
A. Thermometer
C. Barometer
B. Speedometer
D. Anemometer
please answer me
Answer: A. Thermometer
Explanation:
A thermometer is used to measure temperature , while the others measure different things.
the forces that moves against movement
Answer:
Friction
Explanation:
equation for the complete combustion of a hydrocarbon fuel.
Answer:
the general equation for complete combustion reactions is fuel + O2 __ Co2 + H2O .How did Thomson's discovery of neon's isotopes lead to the discovery of neutrons?
Answer:
Neon consisted of atoms of two different masses but chemically alike. ... Movement of electrons between energy levels in atom must absurb just a certain amount energy to move to higher level can't hover between levels.
How many molecules are in 23 moles of oxygen (O2)? Round the answer to one digit past the decimal point. If the answer is less than 1, you must type a zero before the decimal point.
To Find :
How many molecules are in 23 moles of oxygen (O₂).
Solution :
We know, 1 mole of any atom/molecule contains 6.022 × 10²³ numbers of atoms/molecules.
So, number of molecules in 23 moles of O₂ are :
[tex]n= 23\times 6.022\times 10^{23}\\\\n =138.506\times 10^{23}\\\\n = 1.385 \times 10^{25}\ molecules[/tex]
Hence, this is the required solution.
Which process has the minimal effect on heating our atmosphere?
1.Conduction,
2.Convection,
3.Radiation
Answer:
Radiation you're welcome <3
I need help with number 3
the equation is 4Al+3O2=2Al2O3
If someone trys to lur u into a car with candy...say NO. and run away
-THE MORE U KNOW
_NINI
Answer:
as u should. candy ain't even that tempting >^<
Answer:
How about free hoodies and chocolate.....Jkjkjk.....that happened to me once then I got rap edh
Explanation:
Deposits of gold can be found in the deep ocean. true?
Answer:
yes that should be true
Answer:
true
Explanation:
One study found there is only about one gram of gold for every 100 million metric tons of ocean water in the Atlantic and north Pacific
Which chemical formula shows an ionic compound?
NaCl
CO2
C6H12O6
N2O
Answer:
NaCl
Explanation:
The only chemical species that shows an ionic compound is NaCl.
NaCl is an ionic compound that conducts electricity in molten state due to presence of free mobile electrons in the structure when molten.
An ionic bond typically forms between a metal and non-metal. In the compound NaCl, Na is the metal and Cl is the non-metal. The difference in electronegativity allows for this bond type to form.Answer:
it is A i took the test could i have the crown please
Explanation:
Which of the following is a heterogeneous mixture?
A. Oil and Vinegar
B. Air
C. Milk
D. Vinegar in water
Answer:
B
Explanation:
b/c air is not seen by eye
which of these is true about the total amount of energy in a closed system?
Decreases
Destroyed and created
Increases
Remains the same
Answer:
It remains the same
Explanation:
Will mark you as brainiest!
Aluminum has the larger atomic radius.
silicone is larger than carbon.
Aluminum is larger than silicon
I think silicon is the answer
Where are people exposed to chemicals?
O A. Mostly in public buildings
O B. Only in the home
C. Mostly outside
O D. Everywhere
Answer:
I believe the correct answer is D.
Explanation:
You are breathing in dinitrogen and dioxygen. You exhale dinitrogen and carbon dioxide. And the atmosphere contains traces of other gases. You drink water. You have a wash with water, and soap. You eat carbohydrates and proteins. You ride to work on a vehicle powered by hydrocarbons, which spits out carbon dioxide exhaust fumes, and also some nitrogen oxides. And so your exposure to chemicals is pervasive, and unavoidable.
Answer:
d
Explanation:
I need help asap, thank you.
Answer: Answer to your question is B. I did a science
Explanation: Test was to see which would dissolve fastest...
Al(s) + HCl(aq)→AlCl3(aq) + H2(g) Balance the equation.
Answer:
2Al(s) + 6HCl(aq)→2AlCl3(aq) + 3H2(g)
Which elements likely conduct electricity well ?
Check all that apply
Chromium
Iodine
Carbon
Calcium
Osmium
Answer:
Chromium, calcium, and osmium
Explanation:
These elements are metals, considering this, these elements electron shells(orbitals) are further away from the nucleus, with this, their attractions are not as strong as non-metals, so some of their electrons are able to move freely.
When you accumulate many atoms, these metals can form a "sea of electrons" because they all have loose electrons interacting with each other. This allows easy conduction of heat and electricity.
Answer:
Chromium
Calcium
Osmium
Explanation:
The elements likely conduct electricity well are chromium, calcium and osmium. As these are metals and are observed to be good conductors of heat and electricity. They have extra electrons to donate and hence flow of electrons cause them to be a good conductor of electricity. Rest iodine is a non-metals which is not good conductors of electricity. Carbon is not itself a good conductor but one of its allotrope which is graphite is a good conductor of electricity.
Calculate the pH of substance one if it has an [OH-] that is equal to 3.2* 10^-8
Answer:
pH = 6.5
Explanation:
Given data:
pH of substance = ?
[OH⁻] concentration = 3.2×10⁻⁸
Solution:
pOH = -log[OH⁻]
pOH = -log[3.2×10⁻⁸]
pOH = 7.5
we know that,
pH + pOH = 14
pH = 14- pOH
pH = 14 - 7.5
pH = 6.5
Hey ima Girl What event is Caused by Gravity
Answer:
D. The water enters an aquifer through infiltration.
Explanation:
Hope it helps you:)
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What is true of boric acid?
PLEASE HELP
which three statements giving brainluiest
Answer:
will you be my Gf?:)
I am ready to be your gf:)
The example of water boiling away is used to illustrate that water
is not always soluble.
is an unstable substance.
lacks thermal properties.
can change from solid to gas.
Answer:
change from solid to gas
Hii!! I believe the correct answer is D. can change from solid to gas. ((:
Which phrase best describes bronze?
o a pure metal
o a copper-tin alloy
o a mineral ore containing copper and tin
an ionic compound of copper and tin
Answer:
o A copper-tin alloy
Explanation:
Bronze is composed by copper and tin. This means it is not a pure metal.Bronze cannot be mined, so it is not a mineral ore.An ionic compound of copper and tin could also be theoretically used to describe a non-solid ionic compound of copper and tin. However bronze is solid.Hence the answer is A copper-tin alloy.what is an atomic mass unit?
Answer:
A unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12. It is equal to approximately 1.66 x 10-27 kg.
Explanation:
Answer:
a unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12. It is equal to approximately 1.66 x 10-27 kg.
Explanation:
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What is oxidized in a galvanic cell made with silver and nickel electrodes?
A. The silver metal
B. The nickel metal
C. The nickel ions
D. The silver ions
Answer:
B. The nickle Metal
Explanation:
A P E X
I didn’t get any help my recent question so I’m posting it again to see if anybody sees it this time
Question!!!
Determine half life exploration of isotopes
Which statement best describes what happens when a person sees an orange t-shirt?
The t-shirt absorbs orange light from human eyes.
Human eyes reflect orange light back to the t-shirt.
Orange light reflected from the t-shirt enters human eyes.
Orange light absorbed by the t-shirt is perceived by the human eyes.
Answer:
The correct answer is - Orange light reflected from the t-shirt enters human eyes.
Explanation:
Human eyes and brain are altogether able to detect the color of the object by translating the light which is reflected by the object and transmitted by the light receptors in the eyes ad brain translate light to color.
The objects are able to absorb some colors and reflect others on the basis of their wavelength, The reflected colors are detected by our eyes and brain and objects appear to be a particular color. like here, the orange color is reflected by the t-shirt and enters in human eyes.
Answer:
its c
Explanation:
Which one is idk what it is giving brainliest
Answer:
B or C
Explanation:
I don't really know sorry.
Answer:
D
Explanation:
I think D I also took the test.