Answer:
5
Explanation:
They all matter unless it is a decimal.
What is the overall net charge of an ionic compound?
O 1-
O 1+
O 2-
O 0
Which substance can be broken down by chemical means?
Answer:
compounds
Explanation:
Compounds – pure substances that are the unions of two or more elements. They can be broken into simpler substances by chemical means.
List two adaptations the cave glow worm has for capturing prey in a cave
Answer:true
Explanation:
List two adaptations the cave glow worm has for capturing prey in a cave. droos a line of silk to trap palle - silk comes from glands in the mouth. a produces light to lure pret a insects are drawn towards light and get trapped in 3.
HELP I WILL GIVE BRAINLIEST
Which of the following is an example of aerobic respiration?
A.Using yeast to make dough
B.Respiring while swimming underwater
C.Plant roots respiring in soil
Answer:
i think the other person is wrong because humans cant breathe underwater
Explanation:
i say c. is the answer
What is a substance so pure it cannot be broken down? *
Element
Compound
Mixture
Atom
Answer:
Element
Explanation:
This is a pure substance which can't be split into simpler substances by chemical means
_____ are the deepest parts of the ocean floor.
A. Seamounts
B. Trenches
C. Mid-ocean ridges
D. Abyssal plains
Answer:
d
Explanation:
im trying i dont actuly know
The ocean floors are the seafloor or the ocean bottoms are called seabeds. The deepest part of the ocean floor is called trenches. Thus, option B is correct.
What is the classification of ocean floors?The ocean floors are said to be the seabeds that comprise of plains, mountains, and canyons, and are termed submarine relief. It ranges from the continental shelf, slope, rise, abyssal plain, ridges, and trenches.
The continental shelf is the first part and is at the least depth of the ocean floors, while the trenches are present at the greatest depth of the seabeds.
The trenches are the deepest part where the sunlight can not penetrate and ranges from 8000 meters and beyond. They are formed due to tectonic plate activity.
Therefore, option B. the trenches are the deepest part of the ocean beds.
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Which element has 47 protons?silver
Answer:
The answer is Silver
Numbers of Protons in Silver: The element Silver (Symbol Ag) has the Atomic Number of 47. Any atom that contains exactly 47 protons in its nucleus is an atom of silver.
Hope this Helps!
What do all cells requiere a constant supply of
In which of the following scenarios is a chemical change taking place? *
3 points
Quartz crystal fractures when struck.
Sugar dissolves when poured into tea
Liquid water turns to a vapor at 100 degrees Celcius.
Sodium metal reacts with water to form sodium hydroxide and hydrogen gas.
Answer:
The answer to this would be D. Sodium metal reacts with water
The correct option is D. Sodium metal reacts with water to form sodium hydroxide and hydrogen gas.
What is a chemical reaction?A chemical reaction leads to the transformation of a substance. The chemical bonds when bonds between reactants break and form a new chemical bond in products.
Quarts crystal fractures, when struck, is an example of physical change. Sugar dissolved when poured into tea is also a physical change. Liquid water turning to vapor at 100 degrees Celcius is an example of boiling.
When sodium metal reacts with water it will react with water and bonds between sodium and water reacts and will form sodium hydroxide and hydrogen gas.
Na(s) + H2O(aq) → NaOH(l)+ H2(g)
Therefore, The correct option is D. Sodium metal reacts with water to form sodium hydroxide and hydrogen gas.
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A salad including lettuce, tomatoes, and onions would be classified as a
A) compound.
B) element.
C) mixture.
D) solution.
Answer:
C)Mixtured
Explanation:
I know the answer
PLEASE HURRY
Animals respond to external stimuli, such as light, temperature, and danger. Explain what body system is utilized when animals go into fight or flight mode
What phase change is the following substance undergoing?
First, the particles of this substance are closely packed and
are not easily compressed. After the change, the substance
can flow easily but cannot be easily compressed.
a freezing
b melting
Cevaporation
d deposition
e sublimation
Answer:
b melting
Explanation:
The phase change the substance is undergoing is from solid to liquid and this is called melting.
To understand this process, we need to know the the substance changing. A substance that contains particles that are not easily compressed and packed is a solid. Solids have fixed shapes and volumes. Liquids can easily flow although they cannot also be easily compressed.The phase change from solid to liquid is facilitated by a melting process.
Determine what elements are denoted by the following electron configurations:
5) 1s2 2s2 2p6 3s2 3p4
6)
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1
Answer:
5. Sulphur .
Explanation:
sulphur has the electron configuration above because it has 16 atomic number
A student in class drops an element on the floor and it shatters quite easily. Which property does this best exemplify?
Answer:
Glass
Explanation:
What are the missing coefficients for the skeleton equation below?
NH3 (g) + O2(g) → N2(g) + H2001)
Answer:
4, 3 , 2 and 6
Explanation:
The reaction equation is given as;
NH₃ + O₂ → N₂ + H₂O
Now, we need to balance the reaction equation;
NH₃ + O₂ → N₂ + H₂O
put the numbers a,b,c and d;
aNH₃ + bO₂ → cN₂ + dH₂O
We need to balance the equation algebraically, ;
Conserving N;
a = 2c
Conserving H;
3a = 2d
Conserving O;
2b = d
Now, let c = 1, a = 2, d = 3 and b = [tex]\frac{3}{2}[/tex]
multiply through by 2;
a = 4, b = 3, c = 2 and d = 6
Insert the parameters:
4NH₃ + 3O₂ → 2N₂ + 6H₂O
GIVING BRAINLEST WITH WHOEVER HAS THE RIGHT ANSWER! Plz and Tysm.
Which is more dense?
1. Continental Crust
2. Oceanic Crust
3. Both
4. Neither one
whats the name of CaS?
Answer
Chemical formula or Chemical Abstracts Service
Explanation:
A CAS (Chemical Abstracts Service) Registry Number is a unique identifier that tells you, for example, that acetone and dimethyl ketone are actually the same substance.
is it true or false that ALL organisms are made of MANY cells?
Answer:
I think false.
Explanation:
I say false because most living organisms are made up of one cell.
Answer:
yes!
Explanation:
the cell is the basic unit of life; and new cells arise from existing cells
Why might it be important to identify isoelectronic ions/atoms?
Answer:
Isoelectronicity may be used to predict the properties and reactions of a species. It is used to identify hydrogen-like atoms, which have one valence electron and are thus isoelectronic to hydrogen.
Explanation:
Why do atoms with greater numbers of protons have greater electronegativity?
help please , i’ll give u extra points
Answer:
I think c
Explanation:
cuz it says it's only friction to the left and actual force to the right
4 Al + 302 → 2Al2O3
If a chemist does the reaction and produces 3.5 moles of aluminum oxide, how many moles of O2 were used in the reaction?
According to the stoichiometry and given chemical equation ,5.25 moles of oxygen are used in the reaction to produce 3.5 moles of aluminium oxide.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
In the given chemical equation, 3 mole of oxygen produces 2 moles of aluminium oxide.
Therefore for 3.5 moles of of aluminium oxide to be produced 3.5×3/2= 5.25 moles of oxygen are used.
Thus, 5.25 moles of oxygen were used in the reaction to produce 3.5 moles of aluminium oxide.
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Question 2 (1 point)
Given the following UNBALANCED equation,
Ca + HCl → CaCl2 + H2
what are the correct coefficients?
а
b
2,1,2,1
3,2,1,1
1,2,1,1
с
d
1,1,1,2
e
2,2,2,1
List 2 reasons why metals are such great conductors.
PLEASE HELP THIS IS TIMED
Answer:
the atoms in the metals form a matrix through which outer electrons can move freely.
Explanation:
A flow of charged particles is an electric current. A metal has a built in supply of charged particles that can flow from one location to another- the pool of shared electrons.
in the liquid state hydrogen is used as a fuel in
Answer:
Space Technology
Explanation:
what is the most abundant metal in the earth's crust ?
Answer:
aluminium
Explanation:
I think I'm not Rly sure
Answer:
Aluminium
Explanation:
Percent abundance of given elements in the earth's crust are :
Oxygen - 46.6%
Aluminium - 8.1%
calcium-3.63%
gold-0.0011%
But oxygen is a non-metal and aluminium, calcium and gold are metals.
Therefore, Aluminium is the most abundant metal in the earth's crust.
When a substance changes its state, all BUT ONE of these statements ist
A)
Mass remains constant.
B)
Only the form changes.
Kinetic energy changes.
D)
Something chemically new is formed.
Science
Answer:
Science...Only the form changes.Kinetic energy changes.
Explanation:
SCIENCE
Answer:
"Something chemically new forms" is the incorrrect statement
Explanation:
When a substance changes its state, it retains its mass even though its form and kinetic energy changes. It is simply moving between states, that is: loosing energy or gaining it. its chemical composition does not change.
Have a good day dude
Name the element: 1s2 252 2p 3s2 3p6 453 3d9
O Strontium Sr
O Krypton Kr
O Tungsten W
O Copper Cu
Silver Ag
Silicon Si
Answer:
Cu
Explanation:
The sublevel notation is
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹
The element is unknown;
To find the element, sum the superscipts because the indicate the electrons;
2 + 2 + 6 + 2 + 6 + 2 + 9 = 29
The element with 29 electrons is copper
can you pair electrons in degenerate orbitals before filling each orbital halfway
