Answer:
The bottle is labeled pure so it probably is pure.
Explanation:
only_________are involved in forming chemical bonds betwen two atoms
a. s orbital electrons
b. p orbital electrons
c. valence electrons
d. innermost electrons
Answer:
c. valence electrons
Explanation:
igneous rocks might show that there once was blank near by
Answer:
volcano is the likely answer
Ill give brainlest to the one who answers right.
Tổng số hạt e, p, n của nguyên tử M là 40, số hạt mang điện hơn số hạt không mang điện
là 12. Tổng số hạt e, p, n của ng.tử X là 24, số hạt mang điện hơn số hạt không mang điện là 8.
a, Tìm số hiệu, số khối của các nguyên tử M và X.
b, M sẽ mất hay thu thêm bao nhiêu electron, X sẽ mất hay thu thêm bao nhiêu electron để
đạt cấu hình bền vững ?
Answer:
huh I can't understand
Explanation:
what are your language bro
5. What is a habitat?
a) An area of human development
b) A protected area for endangered species
c) The natural home or environment of an animal, plant, or other organism
d) An area where no species live
It's for science
Answer:
c) The natural home or environment of an animal, plant, or other organism
Explanation:
Please note that in order to post questions in Science, you must post in Science section, but not in History. You are asking a wrong question in the wrong section.
Thank You! Please Mark Brainliest! :)
What is the process called when oxygen is mixed with another compound or element?
Answer:
Combustion
Explanation:
The process of adding oxygen to anything is called combustion
What is the energy of a single photon with a wavelength of 750 nm.
Answer:
Refer to the attachment
which of the following statement is correct for a group of a periodic table.
i} All elements have different valency.
ii} The atomic size decrease as we move down.
iii} The electropositivity increase down the group.
iv} The electronegativity increase down the group.
Answer:
I believe it is B
Explanation:
I am on this lesson too :)
Answer:
III Electropositivity increases down the group
Explanation:
Disease caused by virus are more dangerous.Why?
Answer:
Explanation:
1. Virus's are hard to detect because of their simple construction.
2. Some mutate very easily.
3. It is hard to isolate the virus and kill it without doing damage to the host.
If 84.5 mol of an ideal gas occupies 21.5 L at 305 K, what is the pressure of the gas? pressure: atm
Answer:
98.367 atm
Explanation:
For this, you must use the equation PV=nRT. Since you are looking for P, rearrange the equation so that P= nRT/V.
Now collect the information you have:
n (mol) = 84.5
R (ideal gas constant to find atm not every case) = .08206
T (temperature) = 305 K (always convert to kelvin)
V (volume in liters) = 21.5
Now Use P= (85.5 mol)×(.08206)×(305 K)/(21.5) to get your answer in atm
Someone pls help me I will make you brain
Answer:
The answer is true. ozone in the stratosphere is a toxic pollutant that can cause tightness or shortness of breath.
14. A gas in a 400 ml flask exerts pressure of 81.0 kPa at 25.0°C. If the gas
was in a 250 ml container at a pressure of 101 kPa, the temperature would be
a) - 124 °C
b) - 41.2°C
c) 20.0°C
d) 232 °C
Answer: B would be the correct answer
Explanation: You will need to use P1V1/T1=P2V2/T2
So
P1= 81.0kPa /101 =0.799atm
V1=0.4L
T1=25.0C +273.15K= 298.15K
P2= 101kPa /101 = 1atm
V2=0.25L
T2= ?
T2=P2V2T1/P1V1
(1.0atm)(0.25L)(298.15K)/(0.799atm)(0.4L) =233.22K-273.15=-39.92C
Each school day, it takes Mrs. Wohlfert an hour to drive 50.3 miles to drop Dezzie off at daycare. While she travels on US 20, she looks at her speedometer and it says she's going 75 mph, so she better slow down! Once she arrives in Plymouth, she takes 5 minutes to get Dezzie into daycare and say goodbye. It takes Mrs. Wohlfert 10 minutes to drive the 3.9 miles between daycare and Lincoln. Mrs. Wohlfert stays at school for the day for 8 hours, then leaves Lincoln to pick up Dezzie at daycare and head home.
What is Mrs. Wohlfert's total distance traveled in a day?
What is Mrs. Wohlfert's total time travelling from when she leaves her house in the morning to when she gets back home in the afternoon?
What was Mrs. Wohlfert's instantaneous speed that she saw during her trip to school?
Answer:
7.06
Explanation:
because its improper
What is the law of conservation of mass and how does it relate to chemical equations?
What does it mean for a
chemical equation to be balanced?
Answer: Matter cannot be created or destroyed in chemical reactions.
Explanation: This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.
Ill give brainliest if you answer right
Answer:
I DID NOT SEE U QUESTION PROPELY BRO /SIS
hello how to draw the electron dot structure of H2S and F2?
Explanation:
1. Attachment
Electron dot structure of H2S (hydrogen sulfide)
2. Attachment
Electron dot structure of F2 (Fluorine).
when two atoms bond chemically it is because of the interaction between
Answer:
Chemical bonds form when the valence electrons of one atom interact with the valence electrons of another atom
plz help fast lot of points.
Answer:
The one at the top: cuticle
The highest line on the right side: palisade layer
The third line on the left: chloroplast
The line near phloem: vein
The line at the bottom: stomata
Entirely on the attachment.
Explanation:
No need.
Define what the goldilocks zone in our solar system ?
Answer:
the "goldilocks zone" is the habitable zone around a star where it's not too hot and not too cold, so liquid water and life can exist on the planets in this zone.
Explanation:
The distance Earth orbits the Sun is just right for water to remain a liquid and for life to not be frozen or fried. This distance from the Sun is called the habitable zone, or the Goldilocks zone.
Land can also be called:
A) Money and/or profit
B) Natural Resources
C) Human Resources
Write a 125 word summary of what you have learned in "Introducing the Microscope". Be sure to include steps on how to focus, how to solve for magnification, and what a field of view is and how to measure it.
Answer:
Introduction to Basic Microscopy. Microscopes are specialized optical instruments designed to produce magnified visual or photographic (including digital) images of objects or specimens that are too small to be seen with the naked eye.
Microscope are the important tools which are used by scientist. For example, in material science, medicine, mineralogy and microbiology.
Light microscope is able to send light. Light is being focused in a tight breath whereby that light passes through a sample which later it is able to create an image. This image passes to different lenses which magnifies it until it reaches the camera.
There are different types of microscope for example, Compound light microscope, Simple light microscope, and monocular microscope.
In simple light microscope only one lens which which is being used to magnify an object and it is not able to reach to a higher magnification.
In compound light microscope it uses two lenses to produce image. For example eyepiece lens and objective lens.
Explanation:
Which is smaller 1.44 or 1.2544
Answer: 1.2544
Explanation:
if you look at the number 1 and 1 are the go to the next number 4 and 2 aren't so 1.44 is bigger while 1.2544 is smaller.
Answer:
1.2544
Explanation:
Why are microwaves idea for transmitting satellite communication signals?
Answer:
Microwaves are best suited because
they have a higher frequency and small wavelength
Satellite communication and Earth observation from space benefit from microwaves that can pass through haze, light rain, snow, clouds, and smoke. Because they can penetrate the atmosphere, microwaves are used. Small wavelength and high frequency is employed for this.
Microwaves are radio waves with short wavelengths and frequencies in the gigahertz (GHz) range. They can send signals over great distances without any data loss thanks to their high frequency. Without producing signal overlap or interference, they may carry a wide range of frequencies.
Electromagnetic radiations include radio waves and microwaves. In communication, both are utilized. Television and radio programs are transmitted by radio waves, but mobile phones and Wi-Fi use microwaves. Radio waves are one of the several alternatives for satellite communication.
To know more about microwaves, visit;
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Compared with a mole of silver atoms, a mole of calcium atoms
O cannot be determined
O has fewer atoms
O has more atoms
O has the same number of atoms
to be honestl id ldm
During the work-up step, aqueous hydrochloric acid is added to the reaction and a gas is observed. what is the composition of the gas?
The gas likely composed of Hydrogen
Hydrogen is one of the most abundant elements that exist in the world and its natural state is a gaseous state. This means hydrogen can be in other states such as liquid or solid if bonded with other elements but it is not its natural state.
For example:
Ice is solid and it contains both hydrogen and oxygen
Hydrochloric acid is usually liquid and it contains Chlorine and Hydrogen
Because of this, during reactions Hydrogen has a tendency to break its bonds with other elements and return to its gaseous state. Based on this, it is likely the gas in this reaction is hydrogen.
Learn more in: https://brainly.com/question/11837837
19 What is the number of moles of nitrogen gas which react with 18 g of magnesium to form magnesium nitride compound ? [Mg = 24,N=14]
a) 0.25 mol 0 b) 0.5 mol C) 1 mol d) 2 mol
Answer:
0.5 mol of nitrogen gas.
Explanation:
18g of Magnesium in mol is equal to 18g/24 gmol-1 = 0.75 mol and 7g of nitrogen in mol is equal to 7g/14 gmol-1 = 0.5 mol,
Thus, When 18g of magnesium reacts with 7g of nitrogen it implies 0.75 mol of magnesium which reacts with 0.5 mol of nitrogen. :)
The number of moles of nitrogen gas which react with 18 g of magnesium
to form magnesium nitride compound is 0.5mol.
We need to find the number of mole for magnesium and nitrogen.
Mole= mass/molar mass
Magnesium= 18g/24gmol⁻¹ = 0.75mol of Mg
Nitrogen= 7g/14gmol⁻¹ = 0.5mol of N
This implies that when 18g of magnesium reacts with 7g of nitrogen it
means 0.75 mol of magnesium which reacts with 0.5 mol of nitrogen.
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A cube measuring 1cm x 1cm x 1cm is full of water, What is the mass of the water in the cube? (Water has a density of 1.0)
d= m/v
1.0=m/1cm^3
1.0×1cm^3=m
m=1kg/cm^3
. Why can atomic number be used to determine the identity of an element?
Answer:
Because each atomic number is unique.
Explanation:
Atomic number = No. of protons in an element
Each atomic number in each element is unique and that makes it easier to distinguish it between several elements.
Answer:
Because atomic numbers are unique to the element
hope this helps <3
Only_________are involved in forming chemical bonds betwen two atoms
a. s orbital electrons
b. p orbital electrons
c. valence electrons
d. innermost electrons
C)
Only valence electrons are involved in forming chemical bonds betwen two atoms.
Hope this helped you- have a good day bro cya)
pls help noww
Just want to see who's the smartest here
promise to tag u as brainliest
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
1. The equation representing the equation is ~
[tex] \mathrm{Na + Cl\rightarrow NaCl}[/tex]
The given reaction is a redox reaction because there's a transfer of electron from Sodium (Na) to chlorine (Cl)
where sodium is oxidized (due to loss of electron) and chlorine get reduced (due to gain of electron).
2. Sodium is a highly reactive element which belongs to the 1st group of periodic table, hence it can catch fire if it is kept free in atmosphere. so in order to prevent that it is stored in kerosene oil, which doesn't let Sodium come in contact with air .
