Hydrogen: 1
Helium: 2
Lithium: 2•1
Beryllium:2•2
Boron: 2•3
Carbon: 2•4
Nitrogen:2•5
Oxygen:2•6
Fluorine: 2•7
Neon:2•8
Sodium: 2•8•1
Magnesium: 2•8•2
Aluminium: 2•8•3
Silicon: 2•8•4
Phosphorus: 2•8•5
Sulfur: 2•8•6
Chlorine: 2•8•7
Argon: 2•8•8
Potassium: 2•8•8•1
Calcium: 2•8•8•2
Please give me brainliest, I spent a lot of time doing this
Slove this fill in blanks
Answer:
1) Heterogeneous mixture
2). homogeneous mixture
3) water is solvent and sugar is solute
4). sublimation process
heterogeneous
homogeneous
sugar is solvent and water is solute
???
Sterling silver is a mixture of the metals silver and copper.It is used to make jewellery.sometimes sterling silver causes green staining on skin.Which metal do you think is responsible for this?Explain why.
The composition of 925 Sterling Silver lends itself to the occasional green discoloration because of the presence of copper
A homogeneous mixture is a composition of two or more
impure substances in a definite proportion, displaying non-
uniform characteristics.
TRUE
FALSE
The answer is FALSE. I did it on ck-12
2. Name 3 elements that are found in the same period.
3. Identify each of the following
a. Metal:
I
b. Nonmetal:
c. Metalloid:
d. Alkali Metal:
e Halogen:
f Noble Gas:
Teeth are part of the digestive system.
True or False
please help :(
Answer:
True
Explanation:
It all starts out going through your mouth in which you have to chew the food to swallow it.
Which of the following statements best describes why burning
a match would be considered a chemical reaction?
a The match gets consumed by the fire.
b Burning a match forms new substances.
c Burning a match is dangerous.
d Burning a match is not a chemical reaction.
Answer:
I would say B
Explanation:
well the other options are wrong
Burning a match would be considered a chemical change because it forms new substances.
WHAT IS A CHEMICAL CHANGE:
A chemical change is a change that involves the chemical components of the substance involved leading to the formation of new substances. This is opposed to a physical change, which only involves a transformation of state. Examples of chemical changes include rusting, burning a match etc.Burning a match is an example of chemical change because it involves the formation of new substances such as ash, smoke etc from wood (match stick).Learn more: https://brainly.com/question/23693316?referrer=searchResults
which one IS an example of a homogenous mixture?
a- Chicken noodle soup (yum)
b- tea
c- r.r ice cream (rocky road)
Answer:
I think option ( b) tea is right answer
things required to prepare hand sanitizer to be used at school
what you need:
1 part aloe vera gel or glycerin
2 part isopropyl alcohol (rubbing alcohol) with a concentration of 91%
Essential oil, such as lemon or lavender (this is an optional ingredient for scent)
Clean containers for mixing and an air-tight container for storage
Spoon or whisk for mixing
Explanation:
step:
Combine the aloe vera gel or glycerin with the isopropyl alcohol in a clean container. To get one cup of sanitizer, combine ⅓ cup of gel or glycerin with ⅔ cup of rubbing alcohol.
Mix thoroughly with your spoon or whisk to ensure that the alcohol is evenly distributed throughout the gel.
Stir in five drops of an essential oil, if you're using it. This is entirely optional and is only meant to improve the scent of the sanitizer.
Store the sanitizer in an air-tight container. Alcohol evaporates with time, so an air-tight container will keep your sanitizer effective for longer. A pump or squeeze bottle can minimize evaporation while keeping your sanitizer easily accessible — just make sure the container for your sanitizer is clean and air-tight
What is a cell GJFFVf xfhdfvcdd
Answer:
Yeah
Explanation:
Page : Date: What do you mean by a symbol ? What are the bases of making symbols?
Answer:
Hi, There! your Answers are Below And Are 100% Correct
Symbols are the basis of culture. A symbol is an object, word, or action that stands for something else with no natural relationship that is culturally defined
Explanation: The Answer to your Other Question Is In the Pic :)
(Dont forget to mark thanks)
need help with these questions
Answer:
I don't know the answer sorry
CCC Systems and System Models Liquid gallium changes to a gas at 2229°C.
Describe how a model of gaseous gallium would compare to the model of liquid
gallium shown in the picture.
Gaseous gallium will consist of atoms separated from each other by a large distance and do not experience inter-particle attractive forces.
There are three states of matter;
SolidLiquidGasMatter can exist in all these states of matter depending on the extent of inter-particle attractive forces in the substance.
Inter-particle attractive forces are strongest in solids hence they have a definite shape and volume and do not flow.
Liquids have weaker inter-particle attractive forces than solids hence liquid particles can flow. Liquids have a definite volume but not a definite shape.
Gases have almost no inter-particle attractive forces between particles hence gas particles are separated by large distances and move at very high velocities. A gas does not have definite shape or volume.
A model of gaseous gallium will show atoms of gallium separated by large distances and do not experience inter-particle attraction.
A model of gas particles is shown in the image attached to this answer.
Learn more: https://brainly.com/question/11067389
is energy absorbed or released to separate the atoms in water molecules
Answer:
First of all, Energy is released when water molecules bond.
Explanation:
When a bond is formed its stability increases from their respective atoms. So energy is released but when we are breaking a bond we are changing a compound to a lower energy state to higher energy state it's stability decreases and requires a bit of extra energy higher stability of bond higher energy required to break it…
Amplify 1.5 force and motion answers??
Answer:
explain question please
Explanation:
A chemist is conducting an experiment on a system. At the beginning of the experiment a chemist wants to determine the temperature of the system the system has a definite volume but no definite shape which of the following is most likely also true for the system?
A.The molecules in the system has less kinetic energy than a solid
B. The molecules in the system have more kinetic energy than solid
C. The molecules are held together by stronger attractive forces than a solid
D. Heat flow into the system eventually cause it to have a definite shape
The statement that is true about the system is; " The molecules in the system have more kinetic energy than solid".
There are three states of matter
SolidLiquidGasThe difference between these states of matter lies in the magnitude of intermolecular interaction between particles as well as the kinetic energy of the particles of the substance.
Solid particles have the strongest intermolecular interaction hence they have the lowest kinetic energy.
The magnitude of intermolecular interaction is weaker in liquids than in solids therefore liquid particles have greater kinetic energy than solid particles.
Lastly, gas particles have the greatest kinetic energy because intermolecular forces between them is almost negligible.
Liquids have volume but no definite shape. The description in the question must refer to a liquid system.
Learn more: https://brainly.com/question/11067389
Answer:
The molecules in the system have more kinetic energy than a solid.
Explanation:
Just did test
A chemist investigates the
I) melting point
II) flammability
III) boiling point
of acetone, a component of fingernail polish
remover. Which is/are physical?
1. II only
2. I and II only
3. II and III only
4. III only
5. I. II and III
6. I and III only
7. I only
8. None of these
Answer:
1, 2 & 3
Explanation:
. A chemist investigates the boiling point, melting point, and flammability
of a compound called acetone, a component of nail polish remover.
Which of these properties are physical properties and which are
chemical properties?
Physical ( boiling point and melting point ).
Chemical ( flammability )
Among the properties listed (melting point, flammability, and boiling point), only the flammability of acetone is a chemical property. The other properties (melting point and boiling point) are physical properties since they are associated with changes in state .
The correct option is 1 .
The melting point of a substance is the temperature at which it changes from a solid to a liquid state. This is a physical property because it does not involve a change in the chemical composition of the substance. However, acetone is a liquid at room temperature, and therefore, it does not have a well-defined melting point. It would vaporize (evaporate) instead of melting.
Flammability is a chemical property. It refers to the ability of a substance to undergo combustion when exposed to a flame or ignition source. It involves a chemical reaction, as the substance interacts with oxygen to produce heat and light.
The boiling point of a substance is the temperature at which it changes from a liquid to a gas state. This is a physical property, similar to the melting point, as it does not involve a change in the chemical composition of the substance.
Hence , 1 is the correct option
To learn more about melting point
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#SPJ3
Expand the number 7.7046 X 10%
Answer:
0.77046
Explanation:
Which of the following volumes are equal to one liter? Select all that apply.
Check all that apply
10° nl.
1 dm
10 ml
1000 cm
100 dL
The volumes that are equal to one liter are 1 dm and 1000 cm and can be seen in Option B and D respectively. The information below shows the calculation to arrive at the answer.
Dimensional analysis can be defined as the method of conversion from one given unit to another. It is often required to deal with measures that are extremely small (e.g size of an atom) or extremely big, In such circumstances, a conversion between metric measuring units is typically essential.
We are to determine which volumes in the given option are equal to 1 Liter.
Following the International System of Units (SI);
a.
10° nl = 10 nanoliters
10 nanoliters = 1 × 10⁻⁸ Liters
∴
It is incorrect
b.
1 dm = 1 cubic decimeter
1 cubic decimeter is equivalent to 1 Liter.
∴
Option B is correct
c.
10 ml = 10 milliliters
10 milliliters = 0.01 Liter
∴
Option C is incorrect
d.
1000 cm = 1000 centimeters
1 cm = 0.001 Liter
∴
1000 cm = 1 × 0.001 Liters
1000 cm = 1 Liters
Option D is correct
e.
100 dL = 100 deciliters
1 deciliter = 0.1 Liters
∴
100 deciliters = 10 Liters
As such, this option is also incorrect.
Therefore, we can conclude that Only Option B and D are the volumes that are equal to one Liter.
Learn more about Unit conversion here:
https://brainly.com/question/19420601?referrer=searchResults
Which of the following is not a magnetic material A cobalt B iron C nickel D plastic E steel
Answer:
D. plastic[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
Electricity is the flow of...
A. Neutrons
B. Electrons
C. Protons
D. Positrons
Answer:
B. Electrons.
....Hope it helps you....Answer:
B. Electrons
Explanation:
Electrons are held in their shells by an electrical force, so it has to be Electrons.
hope i helped
A scientific theory _______.
a.
describes what occurs every time in a given situation
b.
is not validated by experimentation
c.
can never be changed
d.
is an explanation for a set of events
Please select the best answer from the choices provided
Answer:
D! I had this question for a test last year :)
Answer:
b
Explanation:
it is experimental and can be changed
The volume (V) of an enclosed mass of gas is 350kPa. The pressure of the endlosed gas is now decreased to 125kPa, at constant temperature. What will the new volume of the gas be, in terms of V (2)
Answer: V1/V2 = 0.357,
V2 = (V1/0.357) or 28.0*V2
Explanation: Use the combined gas law: P1V1/T1 = P2V2/T2 We want to find V1/2 (or V2/V1). Rearrange:
V1/V2 = (P2/P1)(T1/T2)
The units all cancel. Temerature is constant, so (T1/T2) = 1.
V1/V2 = (125/350)*(1)
V1/V2 = 0.357
a density of 22.29 g/cm?
What is the mass of a block that measures 6.7 cm by 6.8 cm by 4.3 cm and has a density of 22.29 g/cm^3
Answer:
Jjjiiiiiiiikiioioiiiii99ooi
which consists of only one type of atom
a pure substance
a mixture
a compound
an element
Answer:
an element
Explanation:
elements like iron or copper consist of only one type
Nén một hỗn hợp khí gồm 3,0 mol nitơ và 7,0 mol hiđro trong một bình kín, phản ứng có sẵn chất xúc tác thích hợp và nhiệt độ của bình được giữ không đổi ở 450oC. Sau phản ứng thu được 8 mol một hỗn hợp khí.
(a) Tính hiệu suất phản ứng tổng hợp NH3.
(b) Tính thể tích khí amoniac được tạo thành (ở đktc)
9. A 35.2-mL, 1.66 M KMnO4 solution is mixed with 16.7 mL of 0.892 M KMnO4 solution. Calculate the concentration of the final solution.
Answer:
I think that the answer is 0.79M
PLS HELP ME
The moon is 2.39 • 10^5 miles from the earth. The
average man is 6 feet tall. How many men would have
to stand on top of one another to reach from the earth
to the moon? (there are 5,280 feet in a mile. How many
miles is 6 feet?)
Number of men required to stand on top of each other to reach moon from earth are :
[tex] \boxed{ \boxed{ \: \: \: \: \: \: \: 210320000 \: \: \: \: \: \: \: }}[/tex]
Please help it’s worth a lot!! I need the answer ASAP!!
Answer:
Show me the previous question so I can help
which type of molecule contains two atoms bonded together
A) simple molecule
B) crystal
C) polymer
D) complex molecule
simple molecules contain two atom bonded together
Answer: Simple Molecule
Explanation: Ambigous question. What is the scientific definition of "simple molecule?" More by process of elimination than actual difinition, this is a simple molecule. It takes a minum of two atoms to make a molecule (by definition). A crystal is a collection of molecules, a polymer is a chain of molecules, and a complex molecule is, er . ., complex. The only reasonable, and best, answer is "simple molecule."
Which of the following correctly describes what happens to the kinetic energy of water when it changes from steam to a
liquid?
There is no change in the kinetic energy of the molecules.
The kinetic energy of the molecules increases.
The kinetic energy of the molecules decreases.
The kinetic energy of the molecules increases then decreases.
hi <3
i would say the kinetic energy decreases (so option C), as liquid particles are more closely packed than in a gas
hope this helps <3
