Answers
Answer:
19 electrons in first group of 4th period element that is potassium K
Explanation:
Related Questions
If a substance has a large mass and a small volume how dense is it
Answers
Answer:
Very dense.
Explanation:
Conceptually, you are taking a large amount of atoms and putting them into a small container. This means the spaces between atoms has to be smaller and the substance is more dense. (see image)
Mathematically, the equation for density is mass divided by volume ([tex]Density=\frac{m}{v}[/tex] ). If you divide a big number by a small number, you still have a pretty big number (ex 4/2=2 versus 6/1=6)
explain the difference between aldehyde and ketones
Answers
Answer:
You will remember that the difference between an aldehyde and a ketone is the presence of a hydrogen atom attached to the carbon-oxygen double bond in the aldehyde. Ketones don't have that hydrogen. ... Aldehydes are easily oxidized by all sorts of different oxidizing agents: ketones are not.
Geosmin is an aroma compound found in raindrops. It's chemical formula is C12H22O. The molar mass is 182 g/mol. If you perform combustion analysis of 1.77 grams of this compound, how many grams of carbon should be isolated as CO2 during the analysis?
Answers
Answer:
5.13 g of CO₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
C₁₂H₂₂O + 17O₂ —> 12CO₂ + 11H₂O
Next, we shall determine the mass of C₁₂H₂₂O that reacted and the mass of CO₂ produced from the balanced equation. This can be obtained as follow:
Molar mass of C₁₂H₂₂O = 182 g/mol.
Mass of C₁₂H₂₂O from the balanced equation = 1 × 182 = 182 g
Molar mass of CO₂ = 12 + (2×16)
= 12 + 32
= 44 g/mol
Mass of CO₂ from the balanced equation = 12 × 44 = 528 g
SUMMARY:
From the balanced equation above,
182 g of C₁₂H₂₂O reacted to produce 528 g of CO₂.
Finally, we shall determine the mass of CO₂ produced from the reaction. This can be obtained as follow:
From the balanced equation above,
182 g of C₁₂H₂₂O reacted to produce 528 g of CO₂.
Therefore, 1.77 g of C₁₂H₂₂O will react to produce = (1.77 × 528)/182 = 5.13 g of CO₂.
Thus, 5.13 g of CO₂ were obtained from the reaction.
WORTH 20 POINTS! MY LIFE DEPENDS ON IT HELP
Why do atoms share electrons in covalent bonds?
1. to become ions and attract each other
2. to fill their valence shell
3. to become more polar
4. to increase their atomic numbers
Answers
Answer:
2
Explanation:
Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.
Answer:
To fill their valance shell and become stable!
Explanation:
Rank the following elements in INCREASING Atomic Radius: Fe, Ni, K, Ti (SMALLEST TO
LARGEST)
a. Ti, Ni, Fe, K
b. Ni, Fe, Ti, K
c. Fe, Ti, K, Ni
d. K, Ti, Fe, Ni
Answers
Answer:
b. Ni, Fe, Ti, K
Explanation:
The given elements are present in period 4 of periodic table. Now we will discuss the trend of atomic radius along period.
Atomic radius:
" It is the smallest distance from nucleus to the outer most valance shell of an atom"
When we move from left to right in the periodic table the number of valance electrons in an atom increase. The atomic size goes to decrease in same period because of edition of electron with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. In this way positive charge is also going to increase and this charge is greater in effect than the charge of electrons. This effect causes the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell come closer to the nucleus.
As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.
Ni ∠ Fe ∠ Ti ∠ K
Which of these is smallest?
cells
atoms
matter
elements
Answers
Answer:
atoms
Explanation:
i hope that help you
Answer:
atoms
Explanation:
Looking at the following equation, which is the correct order of coefficients?
NH3 + O2 --> NO + H2O
Answers
Answer: The correct order of coefficients is 4, 5, 4 and 6.
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.
The balanced chemical equation is:
[tex]4NH_3+5O_2\rightarrow 4NO+6H_2O[/tex]
The correct order of coefficients is 4, 5, 4 and 6.
Consider a disubstituted aromatic compound. The parent name is benzene and there is a chloro and bromo substituent. Disubstituted benzenes can be described using the terms ortho, meta and para, depending on their relative distance from each other. The terms are often just abbreviated as o, m and p. In addition, the IUPAC name can use locant numbers instead of the descriptor. Br
Select the correct names for the structure.
1. 1-bromo-3-chlorobenzene
2. 3-bromo-1-chlorobenzene
3. meta-bromochlorobenzene
4. o-bromochlorobenzene
5. ortho-bromochlorobenzene
6. m-bromochlorobenzene
Answers
Answer:The correct names for the structure are:
--> 1. 1-bromo-3-chlorobenzene.
--> 3. meta-bromochlorobenzene.
--> 6. m-bromochlorobenzene.
Explanation:
Benzene is the simplest member of the aromatic hydrocarbons. It has a ring structure consisting of six carbon and six hydrogen atoms. This equally means that a benzene can have up to six substituents. One of the chemical properties is that benzene and other members of its series undergo substitution reaction whereby one or more of its six hydrogen atoms is replaced by monoatomic reagents.
Disubstituted benzene consists of two substituents which are described based on either numerical locants or specific words for the three possible forms.
The numerical locant method are used the same naming substitutes of other hydrocarbons. From the question, the numerical locant method was derived through using the following steps:
--> the functional group is benzene
--> there are two substituents which includes bromine( written as bromo) and chlorine ( written as chloro)
--> while placing the number, it's done alphabetically ('1-bromo' comes before '3-chloro') in a clockwise manner. This is to give chorine the lowest locant number.
The second naming method for a disubstituted benzene is the the ortho-, meta-, para- (or their singel letter equivalent) nomenclature method. This is only used for benzene structures.
--> ortho or O : this is used when the substituents are close to each other in the benzene ring.
--> meta or (m) : This is used when the substituents are separated by one carbon in the benzene ring.
--> para or (p): This is used when the substituents are across each other in the benzene ring
From the question, the bromine substituent is separated from the chlorine by one carbon atom, therefore it's meta-bromochlorobenzene or m-bromochlorobenzene.
During a chemistry lab exercise, a student isolates a compound at STP. In her
lab report, she has identified it as an ionic compound. If it is an ionic compound, it
will likely have a _________boiling point and be a _______ at STP.
Choose the answer with the words in the correct order that complete the
passage.
A. high; liquid
B. low; gas
C. high; solid
D. low; solid
please answer asap thank you !! :)
Answers
Ionic compounds have a high boiling point and be a solid at STP.
What is ionic compound?Ionic compounds are those compounds which are formed due to high electrostatic attraction between cations and anions.
Ionic compounds are generally present in the solid state because of the presence of strong ionic bond. And due to this rigid structure boiling point of ionic compounds are very high as they want more energy to break their bonds.
Therefor, at standard temperature pressure (STP) ionic compounds will likely have a high boiling point and be a solid at STP.
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if you start with 4.3 moles of NH3, how many moles of NANH2 can be produced
Answers
Explanation:
Mole ratio of NH3 to NaNH2 = 2 : 2.
Moles of NaNH2 produced
= 4.3mol * (2/2) = 4.3mol.
A sample of compound A (a clear, colorless gas) is analyzed and found to contain 4.27g carbon and 5.69g oxygen. A sample of compound B (also a clear, colorless gas) is analyzed and found to contain 5.19g carbon and 13.84g oxygen. Are these data an example of the law of definite proportions, the law of multiple proportions, or neither? What do these data tell you about substances A and B?
Answers
Answer:
law of multiple proportions
Explanation:
The law of multiple proportions states that, if two elements A and B, combine to form more than one chemical compound. Then the various masses of one element A, which combine separately with a fixed mass of element B are in simple multiple ratio.
We can see that the ratio of oxygen that combines with carbon in the two compounds( A and B) is 1:2. This demonstrates the law of multiple proportions.
The substances A and B must be CO and CO2 respectively.
In a disproportionation reaction, the disproportionate substance
A. has exactly one oxidation state.
B. has exactly two oxidation states.
C. has at least three oxidation states.
D. has either one or two oxidation states.
Answers
Answer:
The answer is C: has at least three oxidation states.
Explanation:
you're welcome
Answer:
C
Explanation:
got it right on Edge
Convert 8.876 × 10^12 m^2 to units of km^2.
Answers
Answer:
[tex]8.876\times 10^{18}\ km^2[/tex]
Explanation:
In this problem, we need to convert [tex]8.876 \times 10^{12}\ m^2[/tex] to km².
We know that,
1 km = 1000 m
⇒ 1 km² = 10⁶ m²
So,
[tex]8.876 \times 10^{12}\ m^2=8.876 \times 10^{12}\times 10^6\ km^2\\\\=8.876\times 10^{18}\ km^2[/tex]
So, [tex]8.876 \times 10^{12}\ m^2[/tex] is equal to [tex]8.876\times 10^{18}\ km^2[/tex].
이
Determine the the nuclei indicated in blanks in the
right side when Radium (Ra-226) undergoes an
alpha decay
Ne
226/ 88
Ra -->
+
Answers
The daughter isotope : Radon-222 (Rn-222).
Further explanationGiven
Radium (Ra-226) undergoes an alpha decay
Required
The daughter nuclide
Solution
Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,
alpha α particles ₂He⁴ beta β ₋₁e⁰ particles gamma particles ₀γ⁰ positron particles ₁e⁰ neutron ₀n¹The decay reaction uses the principle: the sum of the atomic number and mass number before and after decay are the same
Radium (Ra-226) : ₈₈²²⁶Ra
Alpha particles : ₂⁴He
So Radon-226 emits alpha α particles ₂He⁴ , so the atomic number decreases by 2, mass number decreases by 4
The reaction :
₈₈²²⁶Ra ⇒ ₂⁴He + ₈₆²²²Rn
onsider the iodination of salicylamide by sodium iodide and sodium hypochlorite via an electrophilic aromatic substitution to form iodo-salicylamide. Reaction scheme illustrating the iodination of salicylamide by sodium iodide and sodium hypochlorite via an electrophilic aromatic substitution to form iodo-salicylamide. Calculate the molar masses of the reactants and product. Report molar masses to 1 decimal place.
Answers
Answer:
The answer is "[tex]\bold{263 \ and \ 137.1 \frac{g}{ mol}}[/tex]".
Explanation:
The chemical formula for Salicylamide: [tex]C_7H_7NO_2[/tex]
[tex]\to (12.011 \ \frac{g}{mol} \times 7)+(1.008 \ \frac{g}{mol} \times 7)+(14.0067 \frac{g}{mol} \times 1)+(15.999 \frac{g}{mol} \times 2) \\\\\to (84.077 \ \frac{g}{mol} )+(7.056 \ \frac{g}{mol} )+(14.0067 \frac{g}{mol})+(31.998 \frac{g}{mol} ) \\\\\to (84.077 \ \frac{g}{mol} )+(7.056 \ \frac{g}{mol} )+(14.0067 \frac{g}{mol})+(31.998 \frac{g}{mol} ) \\\\ =137.1377 \approx 137.1\ \frac{g}{mol}[/tex]
The chemical formula of Iodosalicylamide:[tex]C_7H_6INO_2[/tex]
[tex]\to (12.011\frac{g}{mol}\times 7)+(1.008\frac{g}{mol}\times 6)+(126.904\frac{g}{mol}\times 1)+(14.0067\frac{g}{mol}\times 1)+(15.999\frac{g}{mol}\times 2) \\\\\to (84.077\frac{g}{mol})+(6.048\frac{g}{mol})+(126.904\frac{g}{mol})+(14.0067\frac{g}{mol})+(31.998\frac{g}{mol}) \\\\=263.0337 \approx 263.0\ \frac{g}{mol}[/tex]
What is the difference between the structure of simple and complex carbohydrates?
Answers
Answer:
Simple carbs break down easier and contain sugars. Complex carbs contain starch and fiber.
Explanation:
Answer Image result for What is the difference between the structure of simple and complex carbohydrates?
Simple vs Complex Carbs. Carbohydrates are sugars that come in 2 main forms – simple and complex. This is also referred to as simple sugars and starches. The difference between a simple and complex carb is in how quickly it is digested and absorbed – as well as it's chemical structure.
Please help asap! Giving brainliest to correct answer.
Three sections of the periodic table are labeled A, B, and C in the image below.
Which of the following statements is most likely true for an element present in section B?
Select one:
a. It is a highly reactive metal.
b. It is an inert gas at room temperature.
c. It may act as an insulator or a conductor.
d. It is a highly reactive liquid at room temperature.
Answers
Answer:
C. It may act as an insulator or a conductor.
Explanation:
Group B are the metalloids, so they have properties of both metals and nonmetals.
The statement which is most likely true for an element present in section B is: C. It may act as an insulator or a conductor.
A periodic table can be defined as an organized tabular array of all the chemical elements, which is typically arranged in order of increasing atomic number or number of protons (in rows).
In this diagram, the chemical element that is present in section B of the periodic table is a metalloid.
A metalloid can be defined as a chemical element that are typically intermediate between those of semiconductors, non-metals and metals.
Thus, a metalloid has both chemical and physical properties that are a combination of metals and non-metals or semiconductors.In this context, the statement which is most likely true for an element present in section B is that it may act as an insulator or a conductor because it is a metalloid.
Read more: https://brainly.com/question/17482288
what is the chemical symbol for fluoride
Answers
Answer:
I think F
Explanation:
Define the following Vocabulary words
1. Archae Bacteria
2. Bacteria
3. Eukarya Kingdom
4. Domain
Answers
2. A member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus.
3. All the kingdoms of eukaryotic, including fungi, plantae, and animalia are placed in the domain eukarya.
4. Is the highest taxonomic rank in the hierarchical biological classification system, above the kingdom level.
Hope this helps
A pi bond involves: Select the correct answer below: direct orbital overlap with the electron density concentrated along the internuclear axis. side-by-side, or lateral orbital overlap with the electron density concentrated on opposite sides of the internuclear axis. side-by-side, or lateral orbital overlap with the electron density concentrated along the internuclear axis. none of the above
Answers
Answer:
side-by-side, or lateral orbital overlap with the electron density concentrated on opposite sides of the internuclear axis.
Explanation:
Pi bond is a type of covalent bond in which the internuclear axis has regions of orbital overlap below and above it i.e on opposite sides. As a result of the orbital overlap, a node is created along the internuclear axis.
This ultimately implies that, a pi bond is formed due to the lateral (side-by-side) overlap of the unhybridized P-orbital comprising of at least a node along the internuclear axis.
Hence, a pi bond involves side-by-side, or lateral orbital overlap with the electron density concentrated on opposite sides of the internuclear axis.
Additionally, a node is typically formed where an electron cannot be found.
Why do we see this star pattern in the winter, but not at other times of the year? (2 points)
Answers
Answer: We see constellations at different times of the year - spring, summer, fall, & winter. This occurs because the Earth is orbiting the Sun.
Explanation:
What is made when a salt is dissolved in water?
Answers
Answer:
water
Explanation:
the salt dissapears and turns
into vapor
Answer:
A solution is made when a solid (which we call a solute) dissolves into a liquid (that we call the solvent) one example of a solution is salt dissolved in water. The salt and water can be separated again by evaporation (the water will evaporate if left in a got place leaving the salt behind. I don't know if that was the answer that you were looking for
The diagram illustrates photosynthesis.
Which best describes what is happening in the area marked X?
Carbon dioxide enters the stem through xylem.
Oxygen enters the stem through stomata.
Water is carried to the leaves by stomata.
Water is carried to the leaves by xylem.
Answers
Answer:
I think Water is carried to the leaves by xylem.
Answer:
d
Explanation:
Which best describes a hydrate?
A.) It has water molecules bonded directly to it.
B.) It lacks water molecules ik it’s crystal lattice.
C.) It lacks hydrogen and oxygen atoms, which make up water.
D.) It has water molecules incorporated into its crystal lattice.
Answers
what happens when you continue to add a solute to an already saturated solution
Answers
Answer: nothing. It remains undissolved
Explanation: saturated = dissolved as much solute as solvent can contain
You find yourself in a room with dark gray walls. Medeleev’s image says, “This element is essential for plant life to thrive and is found in heavy clay minerals and the ash from your campfire.” What element are these walls made from?
Answers
Answer:
juvn hgf jb ujvi i junk food sux
Explanation:
Help pls!!!!!!!!!!!!!
Answers
Answer:
3rd
Explanation:
Hurry I need Now!!!In which biome would the climax species be reached most quickly following a fire?
A Taiga
B desert
C Grassland
D. deciduous forest
E tropical rain forest
Answers
Answer:
D. Deciduous Forest.
Explanation:
what do you think will happen if there is no coal.
Answers
Answer:
If coal and petroleum will get exhausted it will be very difficult for us to transport because most vehicles depends on petroleum, Transport on Earth will became complicated, and if coal will get exhausted we will lose an unique fossil fuel. Coal is used in various domestic and industrial purposes.
It’s a simple question in Welding when you use a torch if you add a lot of oxygen to the fuel what happens does it burn faster or what I want to know
Answers
Answer:
Easy, the flame is smaller but burns hotter.
Explanation: