What is a mixture meaning
Answer:
A mixture is a substance of different things combined together.
Explanation:
Hope this Helps!
find the oxidation number of carbon in MgCO3
Answer: +2
Explanation: Formula of oxide is MgO, because oxidation state of Mg in MgCO3 is +2.
I WILL GIVE U BRAINLIEST IF U HELP ME!!!!!
Answer:
your awnser is B cutting back
Identify the atom
H₄
CH₄
N
Answer:
Organic Molecule.
Explanation:
Any molecule with C atoms and H atoms are organic molecules in chemistry.
Examples could be C₄H₅, C₉H₁₈O₆, C₅H₁₂N.
Explain in your own words what chemical change is
Answer:
A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust.
Explanation:
Answer: when one chemical substance is transformed into one or more different substances.
Explanation:
*PLEASE HELP*
How do carbon radiometric dating utilize isotopes?
Answer:
Radiocarbon dating works by comparing the three different isotopes of carbon. Isotopes of a particular element have the same number of protons in their nucleus, but different numbers of neutrons. This means that although they are very similar chemically, they have different masses.
Explanation:
What is the first state of matter
Answer:
Plasma
Explanation:
Estimated to be 99.999% of the visible universe, cosmic plasma may be considered to be the first state of matter, that preceded the other states of matter in the history of the evolution of the Universe.
pleaseee help.....ASAP
will mark branliest!!
and give extra points!
Answer:
C
Explanation:
All three can become negative versions: negative ions
Answer:
It is going to be D because Group 1 A and 2 A are s block elements which are METALS, also they are not halogens as the 7 A group is called halogens, Plus they give +1 oxidation state so Correct answer is D as they are group 1 A elements so they have only one valence electron in their valence shell
Sodium has______ Valence electrons and bismuth has ________ electrons
Please help ASAP on market as brainlister
Answer:
Sodium has 1 valence electron and bismuth has 83 electrons (5 valence electrons)
Explanation:
Which of the following is an example that includes
evidence of a chemical reaction?
energy is lost due to
Answer:
Friction
Explanation:
Energy is lost to heat as the object overcomes kinetic friction as it slides up the ramp. The energy loss is equal to the work done by the friction force.
Which option is an element?
a. oxygen
b. sodium chloride
c. air
d. water
Answer:
Explanation:
water
Answer:
oxygen
Explanation:
Which has the longest wavelength?
Which has the highest frequency?
Answer:
Which has the longest wavelength?
✔ microwaves
x infrared
x visible
x X-rays
Which has the highest frequency?
✔ X-rays
x infrared
x microwaves
x visible
Explanation:
I apologize if this was a late answer or if this doesn't answer your original question, but hope this helps! :)
Answer:
Microwaves then X rays
Explanation:
why hot water is hot on touching?
Thermal Energy
When a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.
A sample of matter is made up of three different atoms that are chemically combined. What
type of matter is it? How do you know?
Answer:
liquid
Explanation:
a molecule consists of different atoms chemically combined. A molecule is also a liquid. Molecules make up ice cubes, which are also small water particles which arr yet again liquid.
An element that is in the same period as nitrogen is _________
Group of answer choices
helium
neon
argon
sodium
Answer:
Neon
Explanation:
Chemical element Chemical series Electron configuration
3 . Li -Lithium Alkali metal [He] 2s1
4 . Be-Beryllium Alkaline earth metal [He] 2s2
5. B -Boron Metalloid [He] 2s2 2p1
6. C-Carbon Reactive nonmetal [He] 2s2 2p2
7 . N -Nitrogen Reactive nonmetal [He] 2s2 2p3
8. O-Oxygen Reactive nonmetal [He] 2s2 2p4
9. F -Fluorine Reactive nonmetal [He] 2s2 2p5
10. Ne-Neon Noble gas [He] 2s2 2p6
A number in front of a chemical formula
Group of answer choices
subscript
coefficient
Answer:
the answer is coefficient
Answer:
Coefficient is your answer
HOPE THIS HELPED YOU
PLEASE MARK AS THE BRAINLIEST (ㆁωㆁ)
5. On a 92 point test, a student scored 87 points. What is their percent error?
Answer:
Explanation:
5.7471264367816%
Can y’all look at this and help please
Answer:
2, 3, 4, 5
Explanation:
Pretty sure protons matter a lot unless in acid and bases but ignore this. Atoms mostly empty space as electrons are reeeeeeeeeeaaaallllllyyyy far apart. number of electrons change it is an ion and neutrons change pretty sure its an isotope. Electrons are stupidly small and fast so they don't really count towards the weight. Most mas comes from neutrons and protons in the nucleus
Answer:
2,3,4,5
1st is wrong cuz if u change the number of proton it would change the atomic number which results in different element
6th is wrong because most mass of the atoms come from neutrons and protons collectively so if it would have said THE ATOMS MASS MOSLTY COMES FROM NUCLEONS then u could mark it right
2 Examples of solid, liquid and gas
Answer:
Solid
1. Stone
2. Brick
Liquid
1. Water
2. Oil
Gas
1. Oxygen
2. Nitrogen
Answer:
rock and sand, water and steam, smoke and hydrogen
Explanation:
rock and sand are solids, water and steam are liquids, smoke and hydrogen are gases. trust me i know this
A chemist burns 0.8 g of iron in oxygen.
The iron reacts to form 1.1 g of iron oxide.
Calculate the mass of oxygen that reacted with the iron.
Answer:
0.3g
Explanation:
1.1 - 0.8 = 0.3
Hope this helps
The mass of oxygen that reacted with the iron is 0.3g
The chemist burns 0.8g of iron in oxygen
the iron reacts to form 1.1g of iron oxide
Therefore the mass of oxygen can be calculated by subtracting the mass of iron in oxygen from the mass of iron
= 1.1 - 0.8
= 0.3g
Hence the mass of oxygen that reacted with the iron is 0.3g
Please see the link below for more information
https://brainly.com/question/9631250?referrer=searchResults
1. An atom has 6 protons, 6 neutrons, and 6 electrons. What is the charge of the
atom's nucleus?
A.+6
B.+12
C.-6
D.-18
Answer:
+6
+6
+6
+6
+6
+6answer given
thanks
_________ change is a change in matter that results in a material changing from one state to another without any change in chemical properties. Example: solid ice changes to liquid water.
Answer:
Physical change
Explanation:
DNA and RNA have base pairs that form hydrogen bonds with complementary bases. The DNA molecule shown contains adenine, cytosine, guanine, and thymine. Which base does RNA not have?
A) Thymine B) Adenine C) Guanine D) Cytosine
Answer:
Thymine
Explanation: I took the test
The DNA molecule shown contains adenine, cytosine, guanine, and thymine. The base that RNA does not have is Thymine. The correct option is A.
What are DNA and RNA?DNA and RNA both are genetic materials, and they both represent the genetic material of living organisms. All animals contain DNA in their body. Some plants or bacteria contain RNA as genetic material.
DNA and RNA both contain bases that are attached with a hydrogen bond. These bases are adenine, cytosine, guanine, and thymine. In RNA, the same bases are present.
In RNA, in place of thymine, there is uracil present. Uracil and adenine are joined together with a hydrogen bond. Cytosine and guanine are present together with a hydrogen bond.
Thus, the correct option is A.Thymine, regarding the base present RNA.
To learn more about DNA and RNA, click here:
https://brainly.com/question/26931852
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how many particles are in 100ml
Answer:
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:
Elements in group 16 of the periodic table usually
Answer:
The oxygen family, also know as the chalcogens, consists of the elements found in Group 16 of the periodic table and is the main group elements.
Elements: oxygen, sulfur, selenium, tellurium and polonium.
Hope this helps! :D
Which is a chemical property of oxygen?
1.It reacts with iron to form rust.
2.It is a gas at room temperature.
3.It expands when heated.
4.It combines to form O 2 molecules.
Answer: I think the answer is 1
i just learned this about two weeks ago
Explanation:
Which option is a mixture? a.carbon dioxide b. air c. oxygen d. carbon
Answer:
Air
Explanation:
Did test 100
Can yall plz help me!!!!!!!!!!!!
Define the terms below:
● Axis:
● Rotation:
● Revolution:
● Elliptical Orbit:
Answer:
Axis
Anatomy
In anatomy, the second cervical vertebra of the spine is named the axis or epistropheus. By the atlanto-axial joint, it forms the pivot upon which the first cervical vertebra, which carries the head, rotates.
Rotation
A rotation is a circular movement of an object around a center of rotation. A three-dimensional object can always be rotated about an infinite number of imaginary lines called rotation axis. If the axis passes through the body's center of mass, the body is said to rotate upon itself, or spin.
Revolution
In political science, a revolution is a fundamental and relatively sudden change in political power and political organization which occurs when the population revolts against the government, typically due to perceived oppression or political incompetence.
Elliptic orbit
In astrodynamics or celestial mechanics, an elliptic orbit or elliptical orbit is a Kepler orbit with an eccentricity of less than 1; this includes the special case of a circular orbit, with eccentricity equal to 0. In a stricter sense, it is a Kepler orbit with the eccentricity greater than 0 and less than 1.
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Jimmy's science textbook reflects blue light. What color is the book?