Answers
Answer:
B. 1s,2s,2p,3s
Explanation:
Related Questions
Which is the correct measure of density?
Cm^2/g
g/cm^3
cm^3/g
mass x volume
Answers
Answer:
g/cm^3
Explanation:
Density= m/v
gram is a measurement of mass
cm^3 is a measurement of volume
Hope this helps:) Have a good day!
The web site of the Nobel Prize explains that readers who want to inspect the Curies' notebooks must sign a paper
that states that they are aware of the health risks that are involved with handling the notebooks. What health risk is
most likely to occur from handling the notebooks?
O excessive coughing
o anemia
O muscle cramping
O swelling of the joints
Answers
Answer: anemia because Marie curie died of anemia
Multiply or divide to find the equivalent fraction.
51/120=□/360
Answers
Answer
153
Explanation:
51/120 = x/360
51(360) = 120x
18360 = 120x
18360/120x = 120x/120x
153 = x
Answer:
153
Explanation:
If two atoms have very different electronegativities, will this for me ionic bond or a covalent bond
Answers
Answer:
It will be a covalent bond.
Explanation:
When two atoms combine, the difference between their electronegativities is an indication of the type of bond that will form. If the difference between the electronegativities of the two atoms is small, neither atom can take the shared electrons completely away from the other atom and the bond will be covalent.
why does hydrogen fluoride have a high boiling point
Answers
The intermolecular bonding for HF is van der Waals, whereas for HCL, the intermolecular bonding is hydrogen. Since the van der Waals bond is stronger than hydrogen, HF will have a higher boiling temperature. Since the covalent bond is stronger than van der Waals, HF will have a higher boiling temperature.
What happens when a solid is exposed to sub-zero temperatures?
Answers
Answer:
A substance may undergo phase change from a solid to a gas or from a gas to a solid if the temperature it is exposed to is changed very quickly. If the temperature around a solid is raised very quickly, it can sublimate, or phase change from a solid to a gas without existing as a liquid.
Explanation:
which luquid is known as universal solvent?why?
Answers
Answer:
Water.
Explanation:
it can dissolve more substances than any other liquid.
I hop this helps! :)
Which of the following is not an alteration of a document?
additions
obliteration
erasure
O all of these answers
charring
None of these answers
ill give brainley
Answers
Helppppppppppppppppppppppppppppp
Answers
Answer:
A or B but im going to say A
Explanation:
hope this helped <3
What is the final concentration (M) of a solution prepared by diluting 50.0 mL of a solution to a volume of
Answers
D) 0.600 is the final concentration of the solution of KCl.
V1 = 50.0 mL.
XTRA POINTS 4 CHRISTMAS
What is an empirical formula?
Answers
Explanation:
a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.
Answer:
The answer is A
Explanation:
its is the chemical formula in which the subscripts are given in the smallest ratio
Boron and antimony are good elements to use as
Answers
Answer: Semiconductors
Explanation:
What halogen can react with sodium chloride solution to produce chlorine?
Answers
Answer:
As electro-negativity decreases from Florine to downwards in the group and only Florine is above Chlorine, so Florine should react with sodium chloride solution to produce chlorine.
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PLEASE HELP ASAP I'M SO STRESSED
Answers
Answer:
160.3g
Explanation:
We know the equation:
No of moles = mass ÷ Mass of element
We need to find the mass, so make mass the subject of the formula.
Mass = No. of moles × mass of element
Mass = 5 × 32.06
Mass = 160.3g
write a note about wurtz reaction
Answers
Here is Beck's address:
12 Riverdale Lane, Apartment A
San Jose, California
USA
Imagine each of the five parts of Beck's address represents Earth, the Milky Way, the moon, the solar system, or the universe, based on their sizes. Which of the
following parts of Beck's address would represent the solar system?
O California
O 12 Riverdale Lane
San Jose
O USA
Answers
Answer:
The answer is San Jose
Which choice describes an organism found in the under story of a rain forest?
thick, woody vines
bacteria
very tall trees
palms and other small trees
Answers
Answer:
Palms and other small trees
The choices which describes an organism found in the under story of a rain forest are bacteria, thick and woody vines.
What is under story of a rain forest?The understory is a layer of young trees, short species of trees, shrubs, and soft-stemmed plants that lies several meters beneath the canopy's bottom. The understory differs greatly from one rainforest to the next.
The organism that is found in the under story of a rain forest is bacteria and very small plants, thick and woody vines.
Hence organism that is present in the understory are bacteria, thick and woody vines.
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What is the atomic number of an atom?
Question 3 options:
the number of protons
the number protons and neutrons
the number of neutrons
the number of electrons and neutrons
Answers
Answer: The number of protons
Explanation:
magnesium nitrate contains chemical bonds that are
Answers
Answer:
Magnesium Nitrate is an ionic compound formed by:
Magnesium;Mg+2 (the cation) and Nitrate NO−3 (the poly-atomic anion).
In order for these two ions to bond, the charges must be equal and opposite. Therefore, it will take:
two -1 nitrate ions to balance the one +2 magnesium ion.
An electron is present at an energy level with an energy of 16.32 x 10−19 J. During a transition to another level, 5.4 x 10−19 J of energy was absorbed. Which of the following is true about the present state of the electron?
Answer Choices:
A. The electron moved down to an energy level and has an energy of 10.92 x 10−19 J.
B. The electron moved down to an energy level and has an energy of 21.72 x 10−19 J.
C. The electron moved up to an energy level and has an energy of 10.92 x 10−19 J.
D. The electron moved up to an energy level and has an energy of 21.72 x 10−19 J.
Answers
Answer:
D. The electron moved up to an energy level and has an energy of 21.72 x 10−19 J.
The statement which is true about electrons is that the electron moved up to an energy level and has an energy of 10.92 x 10[tex]^-[/tex]¹⁹ J which is found out as 16.32 x 10[tex]^-[/tex]¹⁹ -5.4 x 10[tex]^-[/tex]¹⁹=10.92 x 10[tex]^-[/tex]¹⁹ J.
What is an energy level?Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.
Energy of the stationary state is given as E= -R
1/n² where R
is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.
They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.
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Students in Mr. Garcia's class were having a race! No, not running. Instead they rolled tennis balls down a wooden track. The tennis balls have the same mass and diameter. Using the data table, decide which ball had the MOST kinetic energy.
Answers
Answer:
it's entertaining. Energy though is the answer
Please I need helppppp
Answers
Answer:
[tex]FeCl_{2} +H_{2} S->FeS + 2HCl[/tex]
Explanation:
I am assuming that we have to balance this equation. On the left side, we have one Fe, 2 H, 2 Cl, and 1 S. On the right side, we have 1 Fe, 1 H, 1 Cl, and 1 S. Adding a 2 as a coefficient in front of the HCl on the right side will make 2 H and 2 Cl instead, balancing the overall equation.
FeCl_{2} +H_{2} S- > FeS + 2HClFeCl 2 +H 2 S−>FeS+2HCl
the atomic number of four elements p,q,r,s are 6,8,10 and 12 respectively. the two elements which can bond ionically are:
Answers
Answer:
The atomic numbers of four elements A, B, C, and D are 6,8,10, and 12 respectively. The two elements which can react to form ionic bonds (or ionic compounds) are B (8= 2,6) and D (12 =2,8,2). So D donates its two electrons to B to fulfill their octet.
Explanation:
How might a firefighter use chemistry?
A. Chemistry can help a firefighter plan an escape route through a
burning building
B. Chemistry can help a firefighter understand combustion and how
to put out fires.
C. Chemistry can help a firefighter understand how much of a load
the floors of a burning building can hold,
D. Chemistry can help a firefighter plan an exercise routine to prepare
for fires
Answers
Answer:
me has answer
Explanation:
b
Hurry. NO Spam! Write the neutralization reaction that occurs between HF and LiOH.
Answers
Answer:
HF + LiOH = LiF + H2O.
Explanation:
Hydofluoric acid is a weak acid the solution would be slightly basic due to the following equilibrium (condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs.)
Hope that helps. x
AC current is produced by which of the following things?
A. Remotes
B. Generators
C. Lights
D. Lasers
Answers
Answer:
B
Explanation:
Please Help giving high points. Perform the following mathematical operation, and eport the answer to the correct number of significant figures. 4568/1.3 = [?]
Answers
Answer:
1.3 is the value with the lowest sig figs in your question. So we have 2 sig figs.
4568/1.3 = 3513.84615
Now let's change the answer in sig figs.
We know that trailing zeros don't actually count as part of sig figs.
So we can round the answer to 3500, having the 2 sig figs (3 and 5) while the trailing zeros don't count.
Final answer = 3500
what type of elements are involved in covalent bonding
Answers
Answer:
non-metals
Explanation covalent bonds occur between elements that are far apart on the periodic table.
The types of elements that are significantly involved in covalent bonding are known as non-metals.
What is Covalent bonding?Covalent bonding may be defined as a type of chemical bonding that may involve the mutual sharing of electrons in order to construct electron pairs between atoms of non-metals. These electron pairs which are formed between atoms are known as bonding pairs or shared pairs.
According to the context of this question, covalent bonds are generally formed between nonmetals. While metallic bonds are the type of chemical bonds which are typically formed between the metallic element.
Another type of bonding may also be formed between elements. This type of bonding is known as Ionic bonding. This chemical bonding mat generally arises between metals and non-metals.
Therefore, the types of elements that are significantly involved in covalent bonding are known as non-metals.
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magnesium carbonate and sulphuric acid react to form
Answers
Answer:
magnesium sulfate + water + carbon dioxide
Explanation:
Chandra wants to know how many moles are contained in 150. 0 g CCl4 (carbon tetrachloride). What quantity of CCl4 should she use to make this conversion? number of moles molecular mass molar mass mole ratio.
Answers
Answer:
Molar mass
Explanation:
The molar mass is the number of grams by which there's exactly one mole of one specific substance. So what you do is divide the grams by the molar mass to obtain the number of moles :).
Answer:
Yep Moler mass is the answer
Explanation: