Answer:
the five major branches of chemistry are organic, inorganic, analytical, physical, and biochemistry.
please help the anion , cation , neither is the options. for all of them
Answer:
Cation
Anion
Cation
Cation
Explanation:
If an atom, or atoms, has a balanced number of electrons (negative charge) and protons (positive charge) they are neutral overall. However, if they are not balanced, they will be charged. These charged species are called ions.
What is an anion?
An anion has more electrons than protons, consequently giving it a net negative charge. For an anion to form, one or more electrons must be gained, typically pulled away from other atoms with a weaker affinity for them. The number of electrons gained, and so the charge of the ion, is indicated after the chemical symbol, e.g. chlorine (Cl) gains one electron to become Cl-, whilst oxygen (O) gains two electrons to become O2-.
What is a cation?
A cation has more protons than electrons, consequently giving it a net positive charge. For a cation to form, one or more electrons must be lost, typically pulled away by atoms with a stronger affinity for them. The number of electrons lost, and so the charge of the ion, is indicated after the chemical symbol, e.g. silver (Ag) loses one electron to become Ag+, whilst zinc (Zn) loses two electrons to become Zn2+.
Source: Cation vs Anion: Definition, Chart and the Periodic Table By
Karen Steward (PhD)
C2H5OH + 302 →2C02 + 3H20, what is the mole ratio
of ethanol to water?
The mole ratio of ethanol to water : 1 : 3
Further explanationGiven
Reaction
C2H5OH + 302 →2C02 + 3H20
Required
The mole ratio
Solution
In a chemical reaction equation, the mole ratio of the reacting compound (reactants or products) is indicated by the reaction coefficient
The reaction coefficient is determined from the number of elements reacting by holding the principle that the number of elements in the reactants is equal to the number of elements in the product
In the above reaction, the ethanol-C2H5OH coefficient is 1 while the reaction coefficient of water-H20 is 3 so that the mole ratio = 1: 3
What is the atomic number of sulfur?
How many of its s orbitals are filled?
How many of its p orbitals are filled?
Answer:
z=16 and five p orbitals are filled and three s orbitals are filled
Draw the reactants and complete the mechanism by drawing in the appropriate electron-flow arrows (including stereochemistry) for the following SN2 reaction of an alkyl bromide. Represent the nucleophile as an ion. Draw all missing reactants and/or products in the appropriate boxes by placing atoms on the grid and connecting them with bonds, including charges where needed. Indicate the mechanism by drawing the electron-flow arrows on the molecules. Arrows should start on an atom or a bond and should end on an atom, bond, or where a new bond should be created.
Answer:
Wow I don't that hhehehe sorry
Name the following ionic compounds. Use the periodic table, the table of common polyatomic ions, and
the transition metal charges chart found here.
Al₂O3:
I
Name
Formula and
Charge
DONE
Ammonium
NH4
Hydroxide
OH
Nitrate
Carbonate
NO3-
CO32-
SO,2-
PO, 3-
Sulfate
Phosphate
Answer: aluminum oxide
Explanation:
Answer:
aluminum oxide
Explanation:
BY ANSWERING THIS QUESTION UR PUTTING IT ON UR MOM's LIFE THAT U WON'T STEAL MY POINTS.
5) Choose the best answer.
Using Gay-Lussac's Law, calculate the new temperature in the following situation.
A sample of gas has a pressure of 3.50 atm and a temperature of 22°C. If the pressure decreases to 1.75 atm, what will be its Celsius temperature if the volume remains constant?
125.5* C
-125.5* C
-147.5* C
-195* C
195* C
6) Choose the best answer.
Using Gay-Lussac's Law, calculate what the new pressure in the following situation.
A tank of acetylene sits on the back of a truck. During the afternoon, the temperature of a gas has reached 38°C (311 K) with a pressure of 508 kPa. That night, the temperature drops to 29°C (302 K). Since the gas was in a metal tank, the volume remained constant. What is the new pressure?
308 kPa
500 kPa
493 kPa
503 kPa
311 kPa
Answer:
[tex]T_2=-125.58\°C[/tex]
Explanation:
Hello!
In this case, considering the Gay-Lussac's law which describes the pressure-temperature behavior as a directly proportional relationship by holding the volume as constant, we write:
[tex]\frac{T_1}{P_1} =\frac{T_2}{P_2}[/tex]
Whereas solving for the final temperature T2, we get:
[tex]T_2=\frac{T_1P_2}{P_1}[/tex]
Thus, we plug in the given data (temperature in Kelvins) to obtain:
[tex]T_2=\frac{(22+273.15)K*1.75atm}{3.50atm} \\\\T_2=147.58K-273.15\\\\T_2=-125.58\°C[/tex]
Best regards!
1-Witch compound is composed of the most atoms?
A- H25O4. B-Li2N.
C-Mg(OH)2. D-NaF.
2-Witch compound has the most hydrogen atoms?
A-NaOH. B-C2H4O.
C-H3PO4. D-(NH3)2SO4.
3-Witch compound has the greatest molar más?
A-H2O. B-C6H12O6.
C-HNO3. D-C2H6.
4-What is the molar mass for Ca(C2H3O2)2?
A-71g. B-99g.
C-158g. D-148g
5-show work for #4.
Answer:
good luck with these problems I've never seen anything like it
How many atoms are there in 15.0 grams of Sulfur (S)?
A) 7.99×10−22 atoms of S
B) 7.77×10−25 atoms of S
C) 2.82×1023 atoms of S
D) 9.03×1024 atoms of S
Answer:
C
Explanation:
Mol x Avogadro's number
Mol : mass / molar mass
Avogadro's no: 6.02E+23
In 15.0 g of sulfur, there are 2.82 × 10²³ atoms of S (C).
We want to calculate the number of atoms in 15.0 g of sulfur. We will need 2 conversion factors.
What is a conversion factor?A conversion factor is an arithmetical multiplier for converting a quantity expressed in one set of units into an equivalent expressed in another.
To convert 15.0 g of sulfur into atoms, we need to consider the following conversion factors:
The molar mass of S is 32.07 g/mol.1 mol contains 6.02 × 10²³ atoms (Avogadro's number).[tex]15.0g \times \frac{1mol}{32.07g} \times \frac{6.02 \times 10^{23}atoms }{1mol} = 2.82 \times 10^{23} [/tex]
In 15.0 g of sulfur, there are 2.82 × 10²³ atoms of S (C).
Learn more about Avogadro's number here: https://brainly.com/question/15989275
P is the dominant allele for purple. p is the recessive allele for white. A Pp flower crosses with a pp flower. What are the possible genotypes? What are the odds of getting each genotype? What are the odds of getting a purple flower? What are the odds of getting a white flower? * PLS HELPASDKSOAD
Answer:
Pp, Pp, pp, pp, 50% chance at purple and 50% chance at white
Explanation:
There are
main variables that every experiment should have
Answer:
Experiments should have the independent variable, and a dependent variable, as well as a constant variable and control variables.
Explanation:
Constants
Experimental constants are values that do not change either during or between experiments. Many natural forces and properties, such as the speed of light and the atomic weight of gold, are experimental constants. In some cases, a property can be considered constant for the purposes of an experiment even though it technically could change under certain circumstances. The boiling point of water changes with altitude and acceleration due to gravity decreases with distance from the earth, but for experiments in one location these can also be considered constants.
Independent Variable
The independent variable in an experiment is the variable whose value the scientist systematically changes in order to see what effect the changes have. A well-designed experiment has only one independent variable in order to maintain a fair test. If the experimenter were to change two or more variables, it would be harder to explain what caused the changes in the experimental results. For example, someone trying to find how quickly water boils could alter the volume of water or the heating temperature, but not both.
Dependent Variable
A dependent variable is what the experimenter observes to find the effect of systematically varying the independent variable. While an experiment may have multiple dependent variables, it is often wisest to focus the experiment on one dependent variable so that the relationship between it and the independent variable can be clearly isolated. For example, an experiment could examine how much sugar can dissolve in a set volume of water at various temperatures. The experimenter systematically alters temperature (independent variable) to see its effect on the quantity of dissolved sugar (dependent variable).
Control
A controlled variable is a variable that could change, but that the experimenter intentionally keeps constant in order to more clearly isolate the relationship between the independent variable and the dependent variable. For example, an experiment examining the relationship between how much sunlight plants receive (independent variable) and how tall they grow (dependent variable) should make sure none of the other factors change. The experimenter should control how much water the plants receive and when, what type of soil they are planted in, and as many other variables as possible.
The end point indicates the completion of the titration by physical change (which is
usually color change)*
True
False
Help it is easy I think
Why must scientific investigations be replicable?
A ) to prove the reliability of the results
B)to confirm ideas and theories
C)to prove its validity within the scientific community
D)to improve the investigation each time
Answer:a
Explanation:
Answer:
Answervis A.
Explanation:
Because,so that other scientists can validate the results.
I hope it's helpful!
I need help fast plz atoms
Answer:
proton and neutron in region one and electron orbiting in region two is the answer
Can some please answer these two questions?
Answer:
1. Mass of potassium (K) = 203.32 g
2. Number of mole of As = 7.53 moles
Explanation:
1. Determination of the mass of potassium (K)
Molar mass of K = 39.1 g/mol
Number of mole of K = 5.2 moles
Mass of K =.?
Mole = mass / Molar mass
5.2 = mass of K / 39.1
Cross multiply
Mass of K = 5.2 × 39.1
Mass of potassium (K) = 203.32 g
2. Determination of the number of mole of Arsenic (As)
Molar mass of As = 74.92 g/mol
Mass of As = 563.9 g
Number of mole of As =.?
Mole = mass /Molar mass
Number of mole of As = 563.9 / 74.92
Number of mole of As = 7.53 moles
is volcanoes eruption rapid change or slow change
Answer:
Fast change
Explanation:
Weathering, erosion, and deposition are examples of slow change. Earthquakes, erupting volcanoes, and landslides happen fast. Therefore, they can change the Earth's surface very quickly.
Universe L, recently discovered by an intrepid team of chemists who also happen to have studied interdimensional travel, quantum mechanics works just as it does in our universe, except that there are seven d orbitals instead of the usual number we observe here. Use these facts to write the ground-state electron configurations of the sixth and seventh elements in the first transition series in Universe L.
Answer:
Iron; [Ar] 3d6 4s2
Cobalt; [Ar] 3d6 4s2 4p1
Explanation:
We know that in our universe, there are five d orbitals known. However, in this strange universe L, there are only three d orbitals known.
The sixth and seventh first row transition elements are iron and cobalt. In universe L, the electronic configuration of iron and cobalt will be written as;
Iron; [Ar] 3d6 4s2
Cobalt; [Ar] 3d6 4s2 4p1
Construct your RNA chain from the following sequence of DNA: GGCTTACGGTAA.
The Answer to this question is CCGAAUGCCAUU
Answer:
GGCTTACGGTAA. = CCGAATGCCATT
Explanation:
.
how does the muscular sytem/muscles help with walking
pls asnwer asap
Answer:
they work with the skeletal system and joints to expand and contract, making a motion.
Explanation:
muscles in your knee pull, then release. do that again and again, and you'll be walkin
Answer:
You're able to walk because of your skeletal muscles
Explanation:
Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
Hope this helps :)
Choose the correct statement for this question: If two objects have different temperatures, in which direction will heat move? For how long?
1. Heat moves from hot to cold objects/areas, and it never stops.
2. Heat moves from cold to hot object/areas.
3.Heat moves from hot objects/areas to cold areas and stops moving once it reaches a thermal equilibrium.
What is the process called to prepare a ceramic by heating a slurry of a powder of an inorganic substance in water to a very high temperature under pressure
Answer: The process that is used to prepare ceramic is sintering.
Explanation:
Sintering is defined as the process in which number of particles are fused together to form one solid mass by the applying pressure at high temperatures.
Ceramic is an material that is made by taking mixtures of clay, earthen elements, powders and water.
When this mixture (slurry of the powders) is heated at a very high temperature and under high pressure, ceramic is formed.
Hence, the process that is used to prepare ceramic is sintering.
Which of these happens when the warm water gets to the North and South Poles
Answer:It creates a heat source on the cold water and the molecules act against each other and then it becomes steam.
Explanation:I had to take this on a test.
Please help immediately it’s due today
How many moles of tin, Sn, are in 2500 atoms of tin?
4.2 × 10⁻²¹ moles Sn
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
2500 atoms Sn
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 2500 \ atoms \ Sn (\frac{1 \ mol \ Sn}{6.022 \cdot 10^{23} \ atoms \ Sn})[/tex]Multiply: [tex]\displaystyle 4.15144 \cdot 10^{-21} \ moles \ Sn[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
4.15144 × 10⁻²¹ moles Sn ≈ 4.2 × 10⁻²¹ moles Sn
A substance made up of two or more types of atoms that are NOT chemically combined is called a(n)
A
element
B
mixture
с
compound
D
pure substance
Answer:
pure substance
Explanation:
it does not combine to anything.
HELP ASAP PLEASE, I WILL GIVE BRAINLIEST
Answer:
1.
Solid: A, B, and C.
Liquid: D and E.
Gas: F.
2.
Into liquid on warm day (37 °C): D and C.
Into a liquid only when heated slightly: C and E.
From liquid to solid readily when placed into a freezer (0 °C): D.
Explanation:
Hello!
In this case, since the melting point is the temperature at which a substance change from solid to liquid and the boiling point from liquid to gas, we understand that substance at a temperature below the melting point is solid, whereas above are liquid; moreover, below the boiling point they are liquid and above gaseous.
In such a way, we have:
1.
Solid: A, B, and C.
Liquid: D and E.
Gas: F.
2.
Into liquid on warm day (37 °C): D and C.
Into a liquid only when heated slightly: C and E.
From liquid to solid readily when placed into a freezer (0 °C): D.
Best regards!
What is the surface area of the rectangular prism below? 7 7 14
Answer:
A=490
Explanation:
Hope this helps :)
Right rectangular prism
Solve for surface area
A=490
l Length
7
w Width
7
h Height
14
h
l
w
d
l
l
h
w
h
w
Solution
Which compound has the most hydrogen atoms?
A. NaOH B. C2H4O C. H3PO4 D. (NH3)2SO4
Assume you mixed 5 µl of your cod fish homogenate with 195 µl working solution. The fluorometer displays a measurement of 12.2 µg/ml. What is the protein concentration of the cod fish homogenate?
Answer:
Hallo
Explanation:
I took that question
Which would
have more
particles:
1 mole Au or
1 mole Ag?
Answer:
1 mole of each element have same number of particles. i.e. 6.02×10^23
Explanation:
So both have same atoms
According to the concept of Avogadro's number, there are same number of particles in 1 mole of silver and gold.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
Learn more about Avogadro's number,here:
https://brainly.com/question/11907018
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Calculate the number of molecules in 0.5 mol of sulfur dioxide, SO2.
Describe what is meant by a mole of sodium atoms. I need answers ASAP
We know, 1 mole of any element/compound contains 6.022 × 10²³ atoms/molecules .
Now, we have to calculate the number of molecules in 0.5 mole of sulfur dioxide, SO₂.
So, number of molecules of SO₂ in 0.5 mole is :
[tex]n = 0.5\times 6.022\times 10^{23}\\\\n = 3.011\times 10^{23}[/tex]
Therefore, number of molecules in 0.5 mole of SO₂ is 3.011 × 10²³.