Answer:
The size of the atom closest to 30 to 300 pm
Explanation:
Someone pls tell me the answer
Answer:
6 inches and that should be the answer
what type of bonds exists between neighboring water molecules?
Answer:
covalent bonds
Explanation:
Which of the following makes its own food using energy from the sun? *
Green algae
Tress
Sunflowers
Answer: All of the above
Explanation:
All of the options are producers, meaning they make their own food from sunlight through the process of photosynthesis.
which of the following is not a characteristic of solution?
A. it is a uniform mixture
B. it will scatter a beam of light
C. it is stable over time
D. the solute and solvent cannot be destinguished by the naked eye
When electrons are shared between atoms, a covalent bond is formed
True
False
Answer:
true
Explanation:
ionic transfer of e^- ions formed (charges)
ionic=non-metal+ metal
ex: F+Ca
covalent sharing e^- no true charges
covalent= non-metal+ non-metal
ex: F+P
( my notes)
What is the difference between an aqueous solution and a liquid (simple definition)
Answer:
The primary distinction between liquid and aqueous is that liquid refers to any fluid that is almost incompressible, whereas aqueous refers to liquids that contain water as the solvent.
Explanation:
NO LINKSSS PLEASE
When preparing a saturated solution of sodium nitrate in water, which of the following actions would speed up the rate of solution?
Select one:
a. Stirring the solution.
b. Evaporating the solvent.
c. Filtering the solution.
d. Cooling the solvent.
Answer:
a. Stirring the solution.
HELP PLSSSS
In terms of their chemical properties (such as how they react with things), how do the elements in a group compare to the other elements in that group? For example, Sodium (Na) and Potassium (K) are both in the same group, what does this mean about their chemical properties?
Answer:
Groups like the Halogens, which include Chlorine and Flourine, share similar properties both behaviorally and structurally. The Periodic Table is essentially a bunch of patterns and trends and the groups (like the one with Sodium and Potassium) were grouped together because of these similarities.
Explanation:
https://en.wikipedia.org/wiki/Alkali_metal
Magnesium metal is placed in sulfuric acid. The solution begins to bubble. The remaining liquid is an ionic solution..... What is the equation for this reaction.
pls balance the equation
Answer:
M g ( s) + 2 H + ( a q) + 2 S O 4 2 − ( a q) -> M g 2 + ( a q) + 2 S O 4 2 − ( a q) + H 2 ( g) The reaction forms magnesium sulfate and hydrogen gas. As the sulfate is still aqueous on either side of the equation, we can leave it out of the ionic equation (it is a spectator ion).
Explanation:
The chemical equation of Magnesium and sulfuric acid:
Mg + H₂SO₄ → MgSO₄ + H₂
What is the chemical equation?A chemical equation can be described as the equation of a chemical reaction involving substances. An equation consists of reactants contributing, formed products, and an arrow to indicate a chemical reaction.
The balanced equation of a reaction involving an equal number of atoms of substances on either side of the equation is known as a balanced chemical equation.
The law of conservation of mass will be followed by such an equation. By obeying this law, the total mass of the reactants as well as products should be equal in a balanced chemical equation.
Given the reaction of Magnesium metal placed in sulfuric acid. The solution starts to bubble as there is the formation of hydrogen gas.
Mg + H₂SO₄ → MgSO₄ + H₂
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rusting of iron can be prevented by wrapping iron articles in newspaper true or false
false, the rusting of iron can be prevented by painting, oiling, greasing or varnishing its surface.
please help!! i do NOT understand chemsitry at all
Answer:
pretty sure there is a calculator
Explanation:
there is a calculator for it ( that's what I do ) btw there is a calculator for every even science or chemistry
What statement most likely describes the effects of this movement at each location?
Location A creates a volcano; Location B uplifts and forms a mountain
Location A uplifts and forms a mountain; Location B creates a volcano
Location A creates a gap allowing molten material to seep through; Location B melts and recycles the crust
Location A melts and recycles the crust; Location B creates new ocean crust
Answer:
C hope it helps
Explanation:
Answer:
location A creates a volcano
Explanation:
mark as brainliest
The Lithium atom has only two energy levels. The third is empty. Therefore, we can refer to the second energy level of the lithium atom as the outermost level. The electrons in this outermost energy level are called valence electrons. Refer to the table you just constructed, and determine the number of valence electrons for the first 18 elements. Fill in the table with the identified number of valence electrons
Type the correct answer in each box. Use numerals instead of words.
Answer:
H=1
Li=1
Na=1
Be=2
Mg=2
B=3
Al=3
C=4
Si=4
N=5
P=5
O=6
S=6
F=7
Cl=7
Ne=8
Ar=8
He=8
Explanation:
Answer:
The person above me got one wrong
Explanation:
How is the molar mass of a molecule determined? What are its units?
Answer:
adding the standard atomic masses (in g/mol) of the constituent atoms.
What law does a balanced chemical equation demonstrate?
Answer:
The law of conservation of mass
Explanation:
A chemical equation is an expression of the net composition change associated with a chemical reaction. It shows how a certain amount of reactants yields a certain amount of products. Both of these amounts are measured in moles. Chemical equations often contain information about the state of the reactants: solid, liquid, gas, or aqueous. In addition, they always adhere to the law of conservation of mass, which holds that matter can change form, but cannot be created or destroyed.
Lighting a match is an example of what kind of energy conversion?
A. Chemical potential energy being converted to heat energy
B. Chemical potential energy being converted to kinetic energy
C. Gravitational potential energy being converted to heat energy
D. Kinetic energy being converted to chemical potential energy
Answer:
Mechanical Energy to Thermal Energy
When you strike a match, it moves through the air until it rubs against a surface. The rubbing produces the heat required to light the match. This is a transformation from mechanical energy to thermal (heat) energy.
Explanation:
Answer:
A is the answer.
Explanation:
What type of bond exists when valence electrons are collectively attracted to positively-charged nuclei but are still mobile enough to travel among all of the nuclei?
a) ionic
b) metallic
c) covalent
d) London dispersion
Answer:
Ionic bond
Explanation:
Cho biết X, Y (ZX < ZY) là hai nguyên tố mà lớp vỏ nguyên tử có electron cuối cùng điền vào phân lớp 4s.
a/ Viết cấu hình electron của X, Y.
b/ Viết kí hiệu nguyên tử của X, Y.
An electric current is passed through water and bubbles start forming. What is a logical conclusion for the bubbles?
A) water is evaporating
B) The water had impurities
C) A physical changes occurred
D) Hydrogen and oxygen are being formed
what is Density?:
the mass of an object
the volume of 1 unit of mass. (e.g. the volume of 1 g)
the mass of 1 unit of volume. (e.g. the mass of 1 cm3)
the volume of an object
Answer:
Density is defined as how tightly or loosely packed a substance is, or to the number of things or people in a certain area.
7) Muscles work to lift a bone in your arm by contracts and relaxes to
help please
Answer:
By contracting, muscles pull on bones and allow the body to move. When you want to bend your elbow, your biceps muscle contracts, and, at the same time, the triceps muscle relaxes. The biceps is the flexor, and the triceps is the extensor of your elbow joint.
Explanation:
yeah, hope it helps a little. :)
Assuming all other conditions remain the same, which of the following will cause an object's density to increase?
A) Its mass increases
B) its volume increases
C) its atoms move together
D) all of the above
Taking into account the definition of density, assuming all other conditions remain the same, increasing mass will cause an object's density to increase.
Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space. That is, density is a quantity referred to the amount of mass contained in a given volume.
Density is an intensive property since it does not vary with the amount of substance.
Since density is the relationship between the mass and the volume of a substance, its calculation is defined as the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
In the previous expression it can be observed that the density is inversely proportional to the volume: the smaller the volume occupied by a certain mass, the greater the density.
On the other hand, density is directly proportional to mass: the greater the mass, the greater the density.
Finally, assuming all other conditions remain the same, increasing mass will cause an object's density to increase.
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brainly.com/question/952755?referrer=searchResults brainly.com/question/1462554?referrer=searchResults1. What allowed fusion reactions to take place in the early universe?
Answer:
Nuclear fusion in stars converts hydrogen into helium in all stars
Which of the following atoms will have the
most similar properties to the atom shown
below
Answer: IV
Explanation:
Atoms with the same number of valence electrons (in this case 2) will have similar chemical properties.
What situations might you encounter?
Please it is for my assessment please could you give me 6 answer please
What do light bulbs emit to produce light?
Group of answer choices
protons
electrons
neutrons
photons
Light bulbs emit photons to produce light. Photons are packets of electromagnetic energy, and when an electric current passes through the filament of a light bulb, it heats up and produces light. Option D is correct.
When an electric current passes through the filament of a light bulb, the filament gets heated up due to the resistance of the material. This heating process causes the filament to become incandescent, meaning it emits light as a result of being heated to a high temperature.
The emitted light consists of photons, which are particles of electromagnetic energy. These photons carry the energy released from the heated filament in the form of electromagnetic waves, resulting in the visible light that illuminates the surrounding area. Protons, electrons, and neutrons are subatomic particles and are not involved in the process of emitting light in a light bulb.
Hence, D. is the correct option.
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--The given question is incomplete, the complete question is
"What do light bulbs emit to produce light? Group of answer choices A) protons B) electrons C) neutrons D) photons."--
1
Which of the following is harmful to natural resources?
A pollution
B
conserving natural resources
C recycling
I need help on this one too
Answer:
The answer option which best describes nuclear fission is: C. A nucleus collides with a neutron and splits, releasing energy.
A nuclear reaction can be defined as a type of reaction in which the nucleus of an atom is transformed by either being joined (fusion) or split (fission) with the nucleus of another atom of a radioactive element and accompanied by a release of energy.
Explanation:
2. Write the charge of each sub-atomic particle in the helium atom above.
Explanation:
The charge of a helium atom is zero
It is neutral because
The number of unit negative charges = number of unit positive charges
One unit negative charge = -1.6 x 10^(-19) which is basically the charge of an electron
One unit positive charge = +1.6 x 10^(-19) which is basically the charge of a proton
A helium atom has 2 protons and 2 electrons, so it is neutral
NOTE: an alpha-particle (He2+) is a charged helium atom it has 2 protons and 0 electrons. Charge of an alpha particle = +3.2 x 10^(-19).
What is H2O (water) classified as? Question 4 options: a molecule an atom an element a diatomic molecule
Answer:
its classified as a molecule