What is the density in units of g/mL of a substance with a mass of 20.0 g and a volume of 4. 0 mL?
Answer:
5 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{20}{4} = 5 \\ [/tex]
We have the final answer as
5 g/mLHope this helps you
I am listing the order starting with new moon.
New Moon
Waxing Crescent
first quarter
waxing gibbous
full moon
waning gibbous
last quarter
waning crescent
and new moon again.
Answer:
new Moon.
waxing crescent Moon.
first quarter Moon.
waxing gibbous Moon.
full Moon.
waning gibbous Moon.
last quarter Moon.
waning crescent Moon.
New moon
Explanation:
Your answer is correct
An alpha particle has the same composition as a A) hydrogen nucleus B) deuterium nucleus C) beryllium nucleus D) helium nucleus
Answer:
Helium Nucleus
Explanation:
Answer:
Helium Nucleus
Explanation:
The gas that makes up about 21 percent of the atmosphere is blank
Answer:
oxygen makes up 21 percent of the atmosphere
Which is an empirical formula? C₂H₄ C₃H₆ P₂O₅ P₄O₆
Answer:
C3H8
Propane/Formula
Explanation:
hope this helps
help asap plz will give brainliest !!!!!!
Answer:B and A
Explanation:
i think
Atoms have been traditionally viewed as being composed of three different types of particles: protons, neutrons, and electrons. However, research done by Louis de Broglie and expanded upon by Erwin Schrödinger changed how scientists viewed electrons. How has our increased understanding of the electron led to current atomic models?
Answer:
See explanation
Explanation:
Before the advent of the wave-particle duality theory proposed by Louis de Broglie, there was a sharp distinction between mater and waves.
However, Louis de Broglie introduced the idea that mater could display wave-like properties. Erwin Schrödinger developed this idea into what is now known as the wave mechanical model of the atom.
In this model, electrons are regarded as waves. We can only determine the probability of finding the electron within certain high probability regions within the atom called orbitals.
This idea has been the longest surviving atomic model and has greatly increased our understanding of atoms.
3 reasons why aluminium is used in making of cooking vessels
Answer is : It is a good thermal and electrical conductor. -The main point to be noted is that aluminium is a highly reactive element and still it is used for making cooking utensils. The reason is that aluminium has a very high affinity for oxygen. So, it reacts with oxygen and forms a layer of aluminium oxide on its surface.
Answer:
This is because aluminium reacts with oxygen present in air to form a thin layer of aluminium oxide . This oxide layer is very stable and prevents further reaction of aluminium with oxygen . Also , it is light in weight and a good conductor of heat Hence , it is used to make cooking utensils .
Explanation:
Believe it
Can someone help me please :)
An analog and a digital version of an audio signal were copied.
Analog wave
Digital wave
Original
Original
wmin TAILLAMOUNTAIN
Varan TO
Copy
Copy
Which conclusion is supported by the results shown in the table?
A. Digital waves can be copied without damaging the audio signal,
whereas analog waves cannot
B. Both digital and analog waves become damaged during the
copying process
C. Analog waves can be copied without damaging the audio signal,
whereas digital waves cannot
D. Noise is introduced when both digital and analog waves are
copied
Answer:
The answer is A.Digital waves can be copied without damaging the audio signal, whereas analog waves cannot
Explanation:
I took AP EX quiz.
Explain, in your own words, what volumic mass is?
Answer:
Volumic mass is the density of a substance in its mass per unit volume. The symbol most often used for density is p.
Due to the lower pressure on top of Mt. Everest, water can
boil before the temperature gets to 100°C. If pure water
begins to boil at 70°C on Mt. Everest, what is this
temperature in kelvins?
Select one:
a.273 K
b.163 K
c.343 K
d.373 K
What are the eleven elements that are gas freezing?
hydrogen, helium, oxygen, nitrogen, argon, neon, fluorine, chlorine, krypton, xenon and radon i believe >__< not in any order ahaha
Answer:
hydrogen, helium, oxygen, nitrogen, argon and neon, fluorine, chlorine, krypton, xenon and radon
Explanation:
URGENT! plz help me T-T
The compound MnO2 could either have a +4 or a +2 oxidation state on the manganese (Mn) atom. Explain how either scenario could occur.
Answer:
See explanation
Explanation:
Manganese is a transition element. All transition elements have incompletely filled d orbitals which ultimately makes them to exhibit a variable oxidation state.
Manganese has electronic configuration of [Ar]4s23d5. This means that two electrons could be lost from the s orbital to yield Mn^2+. Also, two electrons could be lost from both s and d orbitals to yield Mn^4+
If I have ten eggs and lots of milk, flour and oil, how many
crepes can I make?
Answer:
I'd say about 8?
Explanation:
if you wanna make them huge make about 6
PUN
Which of the following is an example of a Response to Change? (Read carefully, the other three are Adaptations)
(A)Thoms and Spikes as a protective mechanism
(B)Polar Bears transparent fur and black skin
(C)Plants turning toward the light
(D)Frogs webbed feet
The element oxygen, represented by the symbol O, is classified as
A. a compound.
В. a mixture.
C. a solution.
D. a pure substance.
Please help soon! :))
The compound F2O has two lone pairs on the central oxygen atom. What's the structure of an F2O molecule? Is this compound polar or non-polar? Question 1 options: A) Bent or angular, polar B) Trigonal planar, polar C) Bent or angular, non-polar D) Trigonal planar, non-polar
Answer: A) Bent or angular, polar
Explanation:
The central atom oxygen has two lone pairs and two bond pairs in [tex]OF_2[/tex]. The number of electron pairs are 4, that means the hybridization will be [tex]sp^3[/tex] and the electronic geometry of the molecule will be tetrahedral. But as there are two lone pair of atoms around the central oxygen atom, repulsion between lone and bond pair of electrons is more and hence the molecular geometry will be bent shape.
The compound [tex]OF_2[/tex] is polar as the net dipole moment of oxygen - fluoride bonds do not cancel each other out.
How would you find the average speed of a marathon runner throughout an entire race? A Divide the total distance the runner travelled by the total time they took to travel that distance B Divide the total time the runner it took the runner to travel that distance by the the total distance they travelled C Multiply the total distance the runner travelled by the total time they took to travel that distance D Multiply the total time the runner it took the runner to travel that distance by the the total distnace they travelled
Answer:
distance divided by time so A
Explanation:
15.
Copper (II) carbonate dissociate when heated strongly according to the
chemical equation.
Kuprum (II) karbonat terurai apabila di panaskan mengikut persamaan kimia
berikut.
CuCO
CuO + CO2
What is the mass of copper(II)oxide formed when 12.4g of copper(11) carbonate
dissociate completely?
[Relative atomic mass: Cu = 64, 0 = 16, C = 12]
Berapakah jisim kuprum(II)oksida yang terbentuk apabila 12.4g kuprum(11)
karbonat terurai selengkapnya.?
[Jisim atom relatif. Cu = 64, 0 = 16, C = 12]
A
8.0 g
B
16.0 g
C
24.8 g
D
160 g
Calculate the Molar Mass in g/mol of Ammonium Sulfate, (NH4)2(SO4)
Answer:
132g/mol
Explanation:
The problem here is to find the molar mass of the compound in g/mol
To solve this problem, we simply sum the atomic masses of the atoms in the compound:
(NH₄)₂ SO₄:
Atomic mass of N = 14g
Atomic mass of H = 1g
Atomic mass of S = 32g
Atomic mass of O = 16g
So;
Molar mass = 2[(14 + 4(1))] + 32 + 4(16) = 132g/mol
NEED ANSWER ASAP HELP!!!!
Answer:
1. 4 Km
2. 40 minutes
3. 0.1 Km/min
Explanation:
1. Determination of the total distance travelled.
From the graph given in the question above, we can see that the total distance travelled by the object is 4 Km since the path taken by the object in the graph ends at the 4 km mark.
2. Determination of the Time taken.
A careful observation of the graph given in the question shows that the entire trip took 40 minutes since the distance travelled by the object ends at the 40 minutes mark on the graph.
3. Determination of the average speed of the object.
Total distance = 4 Km
Total time = 40 mins
Average speed =..?
Average speed = Total distance / total time
Average speed = 4 / 40
Average speed = 0.1 Km/min
Tutorial Service is considered as what type of product?
Answer:
A tutorial, in education, is a method of transferring knowledge and may be used as a part of a learning process. More interactive and specific than a book or a lecture, a tutorial seeks to teach by example and supply the information to complete a certain task.
Identify the common name of this free-living organism.
Tubular organism with tentacles surrounding its mouth; a cnidarian
Hydra
SORRY I DON'T KNOW CORRECT BUT
I THOUGHT THATH THIS IS A CATEPILLAR
PLEASE THANKS THIS ANSWER
If you have 8.5 moles of water (H2O), how many grams of water do you have?
Answer: i think it is 144.16
Explanation:
How many electrons does one neutrally charged atom of argon have?
A 18
O B.22
C. 40
D. 58
Answer:
A. 18
Explanation:
A neutral charged atom is an atom with 0 charge.
Anyway, first look at the periodic table and find Argon.
After you find Argon, look at its Atomic number.
Its Atomic number is 18.
And a neutral atom of Argon has 0 charge.
So we need 18 electrons for Argon to cancel out and become neutral.
Basic math:
18 +( -18) = 0
Therefore, the correct answer is A. 18
Hope it helped!
One neutrally charged atom of argon (Ar) has 18 electrons. (Option B)
What is argon?Argon is an element with atomic number 18, which means it has 18 protons in its nucleus.
In a neutral atom, the number of electrons is equal to the number of protons. Therefore, a neutrally charged atom of argon will also have 18 electrons orbiting around the nucleus.
The number of electrons in an atom is determined by its atomic number and is essential for the atom's chemical properties and interactions.
Argon is commonly used as an inert gas in various applications, including welding, lighting, and as a protective gas in the manufacturing of electronics.
Learn more about argon at:
https://brainly.com/question/29528737
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The electrical charge of the nucleus is determined by:
a. the number of neutrons only
b. the number of protons and neutrons together
c. the number of protons only
d. the number of electron only
84 pt =_____ qt
5.0 gal =_____ L
Answer:
84 pt =__50.4399___ qt
5.0 gal =___18.9271__ L
Explanation:
Have A Wonderful Day!!
Answer: 84 pints = 42 quarts
5.9 gallons = 1.89271
Explanation:
What is the function of the vacuole?
to make proteins
for storage
to transport materials
to control all cell functions
Explanation:
In animal cells, vacuoles are small and help sequester waste products. In plant cells, vacuoles help maintain water balance. Therefore the answer should be B. For Storage
Hope this helps!
Please mark brainliest!
How does the number of tin atoms in the sample compare to the number of aluminum atoms in a 20 gram sample of each (Sn:Al)
The number of Al atoms is greater than the number of Sn atoms
Further explanationGiven
20 gram sample of Tin and Aluminum
Required
Number of atoms
Solution
1 mol = 6.02 x 10²³ particles (atoms, molecules, ions)
So the number of atoms of each element is determined by the number of moles. The greater the number of moles the greater the number of atoms
moles Sn-Tin(Ar = 118,71 u)mol = mass : Ar
mol = 20 : 118,71 u
mol = 0.168
moles of Al-Aluminum(Ar=26.9815 u)mol = 20 : 26.9815 u
mol = 0.741
So the number of Al atoms > number of Sn atoms