Answer:
H^+(aq) + OH^-(aq) -------> H2O(l)
Explanation:
We must first write the molecular reaction equation as follows;
HNO3(aq) + NaOH(aq) ------>NaNO3(aq) + H2O(l)
The complete ionic equation is;
H^+(aq) + NO3^-(aq) + Na^+(aq) + OH^-(aq) -------> Na^+(aq) + NO3^-(aq) + H2O(l)
The net ionic equation therefore is;
H^+(aq) + OH^-(aq) -------> H2O(l)
How many atoms are there in 8.80 moles magnesium chloride? (write your answer in scientific notation).
Answer:
There are 5.30*10²⁴ atoms in 8.80 moles magnesium chloride.
Explanation:
Avogadro's Number is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number represents a quantity without an associated physical dimension. Avogadro's number applies to any substance.
Then you can apply the following rule of three: if 1 mole of magnesium chloride contains 6.023*10²³ atoms, 8.80 moles of magnesium chloride contain how many moles of atoms?
[tex]amount of atoms=\frac{8.80 moles* 6.023*10^{23} atoms }{1 mole}[/tex]
amount of atoms= 5.30*10²⁴
There are 5.30*10²⁴ atoms in 8.80 moles magnesium chloride.
The substances below are listed by increasing specific heat capacity value. Starting at 30.0 °C, they each absorb 100 kJ of thermal energy. Which one do you expect to increase in temperature the most? (3 points)
a
Silver, 0.239 J/(g °C)
b
Aluminum, 0.921 J/(g °C)
c
Lithium, 3.56 J/(g °C)
d
Water, 4.184 J/(g °C)
Answer:
the answer is B
Explanation:
What is the H 2 : H2O molar ratio?
Answer:
The ratio of hydrogen atoms to oxygen atoms used to make water molecules is always 2:1, no matter how many water molecules are being made.
Explanation:
does the mercury not have fixed shape and volume at 20 degree
Answer:
Mercury doesn't have a fixed shape
You are given three liquids. You know that one of them is a suspension, one is a solution with nonelectrolytes, and the other is a solution with electrolytes. Describe the process by which you would differentiate between the three.
Answer:
decant/ filter then decompose the electrolytes by electrolysis
Explanation:
Differentiation of suspension solution is done by filtering and differentiation of electrolyte and non-electrolyte solution is done by electrolysis process.
What is electrolysis process?Electrolysis process is used to decompose the any electrolyte present in any solution into their constitute ions towards the cathodes and anodes under the electric flow of current.
Process which is required to differentiate suspension solution is filtering, because in this solution suspended insoluble particles are present which get filtered. Now to differentiate between non electrolyte and electrolyte solution we will use the electrolysis process, as non electrolyte solution do not show any behavior in this.
Hence, we use filtering and electrolysis process for the differentiation.
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Pick one answer do not put any links please
Circle the letter next to each sentence that is true concerning the compressibility of gases. a. The large relative distances between particles in a gas means that there is considerable empty space between the particles. b. The assumption that particles in a gas are relatively far apart explains gas compressibility. c. Compressibility is a measure of how much the volume of matter decreases under pressure. d. Energy is released by a gas when it is compressed.
Answer:
The large relative distances between particles in a gas means that there is considerable empty space between the particles.
The assumption that particles in a gas are relatively far apart explains gas compressibility.
Compressibility is a measure of how much the volume of matter decreases under pressure.
Energy is released by a gas when it is compressed
Explanation:
The kinetic molecular theory establishes that gases are composed of molecules. These molecules of gas are far apart from each other hence there is a considerable empty space between the gas molecules. As a result of these empty spaces between gas molecules, it is possible to compress a gas.
Compressibility is defined as a measure of how much the volume of matter decreases under pressure. When a gas is compressed, work is done on the gas and energy is evolved hence the gas heats up.
Identify one factor represented in the diagram that is used to classify the ten types of clouds
the answer has to be 3 to 5 sentences for me to get full credit. ❤❤
Calculate the molarity 14.1 moles of FeCl3 dissolved in 2350 ml of solution
The image shows two spheres hung from a thin rope. The spheres do not affect each other.
What is most likely true about these spheres?
-Both spheres are neutral.
-Both spheres have a positive charge.
-Both spheres have a negative charge.
-One sphere has a positive charge, and the other has a negative charge.
Answer:
both spheres have a positive charge
What is the formation of gas is an example of?
Answer:
The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. ... As wood burns, it turns into a pile of ashes and gases that rise into air.
Explanation:
How many atoms of hydrogen are there in one molecule of water. if the chemical formula is H202 ?
a. 0
b. 1
c. 2
d. 3
2. What percentage of the offspring
will have the red flowers?
Answer:
1/4 of the offspeing will have the red flowers
Under which condition will the atmospheric pressure be greater. When the air is cold, or when the air is warm
Hyperthermus butylicus is an aquatic prokaryote found near the coast of Portugal. It is found sand along the gas vents that release steam and carbon dioxide. In what domain would scientists classify this prokaryote?
A Eukarya
B Bacteria
C Archaea
D Fungi
How can water affect the rock cycle?
Water can cause rocks to break into sediments through mechanical weathering.
Water can cause rocks to be buried deep underground.
Water can cause rocks to melt.
Water can causer rocks to break into sediments through chemical weathering.
Answer:
b
Explanation:
b because it's a physical change
Which flows through the other?
Complete the missing information in the reactions. Then, label the reaction one of the following:
Alpha Decay
Electron Capture
Beta Decay
Positron Emission
.
14
N +
0
Type:
238
92
234
90
Th +
Type:
15
0
15
N +
7
Type:
8
0
32
15
Type:
105
Ag +
47
105
Pd
46
Type:
40
Type:
20
I
244
94 Pu -
Type: :
___ SeCl6 + ___ O2 --> ___ SeO2 + ___ Cl2
What is the balanced equation for these reactions?
I give Brainliest! Please no links
Answer:
SeCl₆ + O₂ → SeO₂ + 3Cl₂
Explanation:
Unbalanced:
SeCl₆ + O₂ → SeO₂ + Cl₂
Count the atoms.
On the left side, we have 1 Se atom, 6 Cl atoms, and 2 O atoms.
On the right side, we have 1 Se atom, 2 O atoms, and 2 Cl atoms.
So everything is balanced except for Cl. To balance, we put a 3 coefficient in front of Cl₂.
SeCl₆ + O₂ → SeO₂ + 3Cl₂
c:
Definition:This is a type of lab equipment in which students use probes, interfaces, and software for real-
time data acquisition, display, and analysis with a computer or calculator
What is the term?
What is the formula to find
moles
Explanation:
these are the formula that u need to know
1. moles= concentrate × volume
2. moles = mass / mr
3. moles = volume in dm3 / 24dm^3
4. moles = Pressure in pa × Volume in m3 / 8.031 × temperature in K
hope this helps :)
Can yall help me with this one, thanks!
Answer:
Element atom molar mass Total % composition
Na 1 23 40 57.5 %
O 1 16 40 40%
H 1 1 40 2.5 %
The given compound is NaOH.
Na : number of atom= 1
Molar mass= 23 g/mol
Total mass of NaOH = 40 g/mol
% composition by mass = [tex]\frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{23}{40}\times 100=57.5\%[/tex]
O : number of atom= 1
Molar mass= 16 g/mol
Total mass of NaOH = 40 g/mol
% composition by mass = [tex]\frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{16}{40}\times 100=40\%[/tex]
H : number of atom= 1
Molar mass= 1 g/mol
Total mass of NaOH = 40 g/mol
% composition by mass = [tex]\frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{1}{40}\times 100=2.5\%[/tex]
Which of the following are things that may change during an experiment?
Answer:
The things that are changing in an experiment are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types.
Convert 16.8 L of nitrogen monoxide gas at STP to grams .
1.What is the coefficient of the scientific notation answer ?
2.What is the exponent of the scientific notation answer ? 3.How many significant figures are there in the answer?
4.What is the right most significant figure in the answer ?
Convert 12.5 grams of fluorine gas at STP to L.
1.What is the coefficient of the scientific notation answer? 2.What is the exponent of the scientific notation answer? 3.How many significant figures are there in the answer ?
4.What is the right most significant figure in the answer?
Answer:
See explanation
Explanation:
1 mole of a gas occupies 22.4 L
x moles occupies 16.8 L
x = 1 mole * 16.8 L/22.4 L
x = 0.75 moles
number of moles = mass/molar mass
mass = number of moles * molar mass
mass = 0.75 moles * 30.01 g/mol = 22.5075 g = 2.25 * 10^1 g
the coefficient of the scientific notation answer = 2.25
the exponent of the scientific notation answer = 1
significant figures are there in the answer = 6
the right most significant figure in the answer = 3
2.
number of moles = 12.5g/38g/mol = 0.3289 moles
1 mole occupies 22.4 L
0.3289 moles occupies 0.3289 moles * 22.4 L/1 mole
= 7.36736 L = 7.36736 * 10^0 L= 7.37 * 10^0 L
the coefficient of the scientific notation answer =7.37
the exponent of the scientific notation answer = 0
significant figures are there in the answer = 6
the right most significant figure in the answer= 3
How many moles are there in 2.35x10^23 molecules of water
Answer:
0.39017 moles
Explanation:
a mole is 6.023×10^23
(2.35×10^23)÷(6.023×10^23)=0.39017
When performing a neutralization reaction, how should students test the solution to be sure which is the acid and which is the base?
Explanation:
La reacción entre un ácido y una base se llama neutralización. Cuando en la reacción participan un ácido fuerte y una base fuerte se obtiene una sal y agua. Si una de las especies es de naturaleza débil y la neutralización se produce en disolución acuosa también se obtiene su respectiva especie conjugada y agua.
The actual value for absolute zero in degrees Celsius is −273.15. Use the formula below to determine your percent error for both gas samples.
|experimental value – actual value| x 100
actual value
Please just tell me how to find the experimental value
Answer:
As you noticed, the percent-error formula needs you to use a value in the ... The actual absolute zero is 275C below my coldest recorded value. ... The only way your calculations makes sense is you're trying to calculate how ... Next, I'll interpret "I found that AZ is at -258°C" as "I calculated AZ to be 260 degrees below 2°C".
Explanation:
The experimental error will be 8.95%
Calculating percentage error.The formula used for calculating the percentage error is expressed as:
[tex]\% error=\frac{|exp. \ value - actual \ value|}{actual \ value} \times 100[/tex]
Given the following parameters
Actual value = −273.15 degrees Celcius
Let the experimental value be 300 degrees Celcius (since we are not given)
[tex]\% error=\frac{|300 - 273.15|}{300} \times 100\\\% error=\frac{|26.85|}{300} \times 100\\\% error=8.95\%[/tex]
Hence the experimental error will be 8.95%
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define the term pure substance
Answer:
Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure. Pure substances are further classified as elements and compounds. An element is a substance that consists of only one type or kind of atom
Answer:
define the term pure substance :
A pure substance does not have to be of a single element or compound, This can either be one single element or one single compound, but every sample of this substance that you examine must contain exactly the same thing with a fixed, definite set of properties
Explanation:
Which question is a scientist who studies the genetic engineering of crops most likely attempting to answer?
A. How can a more stable supply of crops be created?
В. How can natural selection create better crops?
С. How can crops be grown without a need for light?
D. How can the genetic variation of crops be increased?
Answer:
i think that it is A
Explanation:
the other ones did not make as much sense
A scientist who studies the genetic engineering of crops most likely attempting how more stable supply of crops be created. so, option A is correct.
What is genetic engineering ?Genetic engineering, often known as genetic alteration, is a technique that modifies an organism's DNA using technology developed in labs. This could entail altering a single base pair (A-T or C-G), erasing a section of DNA, or incorporating a new DNA sequence.
In order to fix genetic flaws and hence prevent or treat hereditary illnesses, gene therapy aims to change specific genes.
The goal of genetic engineering is to alter the genes to increase the organism's capabilities beyond what is typical.
The term "genetic engineering" originally applied to a number of methods for modifying or altering living things through their heredity and reproductive processes.
Thus, option A is correct.
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