Answer:
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Explanation:
Answer:
a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Explanation:
Here's an example. When you burn wood, It releases Carbon dioxide, water vapor, and ashes. It just depends what chemicals you use ^^
convert 2.39 x 1022 molecules of water into moles of water
Answer:
[tex]0.0397\ \text{mol}[/tex]
Explanation:
Number of molecules of water = [tex]2.39\times 10^{22}[/tex]
[tex]N_A[/tex] = Avogadro's number = [tex]6.022\times 10^{23}\ \text{mol}^{-1}[/tex]
Number of moles is given by
[tex]\dfrac{2.39\times 10^{22}}{6.022\times 10^{23}}[/tex]
[tex]=0.0397\ \text{mol}[/tex]
The number of moles of water is [tex]0.0397\ \text{mol}[/tex].
How often is Earth's surface being changed?
1 every hundred years
2 never
3 at all times
4 once a year
Answer:
I believe it is 3.
Explanation:
because the earth is constantly shifting.
53.0 g of silver (1) nitrate reacts according to the reaction shown below:
AgNO3 + KCI — AGCI + KNO3
Find the theoretical yield of AgCl. If the amount of AgCl actually produced is 38.5 grams,
what is the percent yield of the experiment?
Answer:
Percent yield = 86.09%
Theoretical yield of AgCl = 44.72 g
Explanation:
Given data:
Mass of silver(1) nitrate = 53.0 g
Actual yield of AgCl = 38.5 g
Theoretical yield of AgCl = ?
Percent yield = ?
Solution:
Chemical equation:
AgNO₃ + KCl → AgCl + KNO₃
Number of moles of AgNO₃:
Number of moles = mass/molar mass
Number of moles = 53.0 g/ 169.87 g/mol
Number of moles = 0.312 mol
now we will compare the moles of AgNO₃ and AgCl
AgNO₃ : AgCl
1 : 1
0.312 : 0.312
Theoretical yield of AgCl:
Mass = number of moles × molar mass
Mass = 0.312 mol × 143.32 g/mol
Mass = 44.72 g
Percent yield:
Percent yield = (actual yield / theoretical yield) × 100
Percent yield = ( 38.5 g / 44.72 g ) × 100
Percent yield = 86.09%
The analysis of data leads to _____.
A. theories
B. variables
C. hypotheses
D. conclusions
Answer: D, Conclusions
Explanation: Gradpoint
chemical equation for cycloheptane (l)
Answer: C7H14 - PubChem.
Explanation:
How many moles are there in 36.0 grams of water?
Answer:
There are 4 moles of hydrogen atoms in 36 grams of water,
Explanation:
If the common element of Fluorine-9 and one of the isotopes is Fluorine-10, what does the -10 tell us about the element and how many protons and neutrons does the element have?
flourine have 9 proton
19 neutrons and 9 electron
mark be a brain list
2H2O = 2H2 +O2
If 30mL of hydrogen are produced in above reaction, how many mL of oxygen are produced? Please show work.
Answer:
15 mL of O₂.
Explanation:
The balanced equation for the reaction is given below:
2H₂O —> 2H₂ + O₂
From the balanced equation above,
2 mL of H₂O reacted to produce 2 mL of H₂ and 1 mL of O₂.
Next, we shall determine the volume of H₂O needed to produce 30 mL of H₂. This can be obtained as follow:
From the balanced equation above,
2 mL of H₂O reacted to produce 2 mL of H₂.
Therefore, 30 mL of H₂O will also react to produce 30 mL of H₂.
Thus, 30 mL of H₂O is needed for the reaction.
Finally, we shall determine the volume of O₂ produced from the reaction. This can be obtained as follow:
From the balanced equation above,
2 mL of H₂O reacted to produce 1 mL of O₂.
Therefore, 30 mL of H₂O will react to produce = (30 × 1)/2 = 30/2 = 15 mL of O₂.
Thus, 15 mL of O₂ were produced from the reaction.
Given the Punnett Square above, with Y=dominant yellow allele and y= recessive green allele, what is the probability of an offspring plant having a green phenotype?
Question 5 options:
25% green phenotype
50% green phenotype
75% green phenotype
100% green phenotype
Answer:
50 percent
Explanation:
Considering one heterozygous parent and a homo-zygous recessive parent, the probability of an offspring plant having a green (recessive) phenotype is 50 percent (50%).
What is a Punnett square?A Punnet square is a diagram used to represent the gametic combination that will give rise to a given genotype/phenotype.
In this case, one parent is heterozygous (genotype Yy, carrier of the recessive allele), whereas the other parent is recessive homo-zygous (genotype yy).Here, the Punnett square is equal to:Y y
y 1/4 Yy 1/4 yy
y 1/4 Yy 1/4 yy
In conclusion, considering one heterozygous parent and a homo-zygous recessive parent, the probability of an offspring plant having a green (recessive) phenotype is 50 percent (50%).
Learn more in:
https://brainly.com/question/3522181
Which of the following is not a chemical change?
a. paper being shredded
b. steel rusting
c. charcoal burning
d. a newspaper yellowing in the sun
Answer:
paper being shredded
Explanation:
Answer:
its A
Explanation:
describe how plants might be affected if the inter molecular forces in water decreased? i need asap!
Answer:
Water has polar O-H bonds. The negative O atoms attract the positive H atoms in nearby molecules, leading to the unusually strong type of dipole-dipole force called a hydrogen bond. Since water has hydrogen bonds, it also has dipole-induced dipole and London dispersion forces.
Hope it helped!!
How many grams are in 2.2 moles of sodium hydroxide (NaOH)?
Answer:
1 mole is equal to 1 moles NaOH, or 39.99711 grams.
(( hoped this helped ))
Answer:
1 mole is equal to 1 moles Sodium Hydroxide, or 39.99711 grams. Note that rounding errors may occur, so always check the results.
CuBr(s)⇄Cu+(aq)+Br−(aq)
Shown above is the chemical equation for the dissolution of the slightly soluble salt CuBr(s). Its Ksp value in pure water was experimentally determined. CuBr was found to be much less soluble in a 0.001MNaBr solution than in pure water. Which of the following correctly explains the decrease in solubility of CuBr in 0.001 M NaBr?
A.)The concentration of water is much less in the NaBr solution than in pure water, reducing the rate of dissolution of the salt.
B.)The presence of Na+ ions in the solution inhibits the dissolution of salts.
C.)The presence of additional Br− already in the solution decreases the value of the Ksp for CuBr , causing the solubility to decrease.
D.)The presence of additional Br− ions already in the solution means equilibrium will be reached when much less CuBr has dissolved.
Answer:
D) The presence of additional Br- ions already in the solution means equilibrium will be reached when much less CuBr has dissolved.
Explanation:
CuBr ⇄ [tex]Cu^+[/tex] + [tex]Br^-[/tex]
Because there is Br- in CuBr, when put into solution, those Br- ions become part of the products side of the equation, shifting the equilibrium back towards the CuBr side, meaning less CuBr will dissolve.
The decrease in the solubility of the CuBr in NaBr solution has been due to the presence of additional Br ions in the solution. Thus option C is correct.
The equilibrium position has been the condition when the concentration of the reactants and products has been equal. The solubility of the CuBr has been dependent on the ksp for the solution.
The ksp has been the solubility product and has been dependent on the concentration of the reactants. The NaBr solution will be dissociated in the form of Na ions and Br ions. The dissolution has been based on the equilibrium of the CuBr.
With the presence of additional Br ions, the equilibrium of the CuBr solution has been reached earlier, and thereby the solubility of the solution has been decreased.
The decrease in the solubility of the CuBr in NaBr solution has been due to the presence of additional Br ions in the solution. Thus option C is correct.
For more information about solubility, refer to the link;
https://brainly.com/question/4736767
when a liquid is cooled the kinetic energy of the particles a)decrease b) increase c) stay the same
Answer:
a) decrease
Explanation:
Hope this will help
What are zebra mussels?
Answer:
The zebra mussel is a small freshwater mussel.
How many moles are present in 63.80L of oxygen gas, O2?
Answer:
2.85moles of oxygen gas
Explanation:
Given parameters:
Volume of oxygen gas = 63.8L
Unknown:
Number of moles = ?
Solution:
We assume that the gas is under standard temperature and pressure. To find the number of moles, use the expression below:
1 mole of a gas at STP occupies a volume of 22.4L
So;
63.8L of oxygen gas will take up a volume of
[tex]\frac{63.8}{22.4}[/tex] = 2.85moles of oxygen gas
Convert 4.56 g/ml to lb-fl-oz
Answer:
g-lb 0.01005308
ml-fl Oz 0.1541919
The value of 4.56 g/mL is 0.296 lb/fl-oz.
Explanation:
Given:
The density with 4.56 g/mL
To find:
Convert 4.56 g/ml to lb/fl-oz
Solution:
In 1 pound there are 453.592 grams:
[tex]1 pound = 453.592 grams\\1 grams=\frac{1}{453.592 } pounds\\4.56 g/mL=4.56\times\frac{1}{ 453.592} lb/mL\\=0.0100 lb/mL[/tex]
In 1 fluid ounce there are 29.5735 milliliters:
[tex]1 \text{fluid ounce} = 29.5735 milliliter\\1 mL=\frac{1}{29.5735} fl-oz\\0.0100 lb/mL=\frac{0.0100}{\frac{1}{29.5735}} lb/fl-oz\\0.0100 lb/mL=0.0100 \times\frac{29.5735}{1} lb/fl-oz\\=0.296 lb/fl-oz[/tex]
The value of 4.56 g/mL is 0.296 lb/fl-oz.
Learn more about conversions here:
brainly.com/question/17743460
brainly.com/question/24530464
helpppp nowww plsss!!
Answer:
Solar energy.
Explanation:
Solar Energy,
Renewable sources are those, which can be used again and again so, solar energy is the answer.
Calculate the mass of iron (iii) oxide that contains a trillion iron atoms
Answer:
Calculate the mass of iron(III) oxide (Fe20) that contains a trillion (1.000x 10") oxygen atoms. Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits. A chemist measures the amount of oxygen gas produced during an experiment. He finds that 9.2 g of oxygen gas is produced.
Explanation:
HELPP nowww plssss!!!!
Water in the atmosphers is in its gas form and is called water vapor. Where does most of the water vapor in the atmosphere
evaporate from?
Answer:
Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Water vapor is transparent, like most constituents of the atmosphere. Under typical atmospheric conditions, water vapor is continuously generated by evaporation and removed by condensation.
Polar air masses bring warm temperature and have lower air temperature? T or F
Answer:
t? im pretty sure have a good day
What is the air we breathe composed of?
Answer:
oxygen
Explanation:
how many oxygen atoms are in 1 mol of CO2
Answer: 2 atoms
Explanation: A molecular formula of the compound carbon dioxide is CO 2 . One molecule of carbon dioxide consists of 1 atom of carbon and 2 atoms of oxygen.
8. The size and shape of an object are some of its....
Answer:
Characteristics...
Explanation:
I hope that's right, if not super sorry. I'm not the smartest. I tried my best if it's wrong
In Raoult’s law, what happens to the partial pressure of the solution when the mole fraction of the solvent increases?
Answer: c. it increases
Explanation:
For the balanced equation 2C6H6OS+1102=12CO+6H2O+2SO3 how many moles of C6H6OS reacted if 0.474 moles of SO3 are produced?
Answer:
0.474 moles of C₆H₆OS
Explanation:
Step 1: Write the balanced equation
2 C₆H₆OS + 11 O₂ ⇒ 12 CO + 6 H₂O + 2 SO₃
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of C₆H₆OS to SO₃ is 2:2.
Step 3: Calculate the moles of C₆H₆OS reacted if 0.474 moles of SO₃ are produced
We will use the previously established molar ratio.
0.474 mol SO₃ × 2 mol C₆H₆OS/2 mol SO₃ = 0.474 mol C₆H₆OS
Prepare 800 mL of 2M sodium chloride. How many grams of NaCl needs to be dissolve in a 800 mL distilled water?
Answer:
93.6 g of NaCl.
Explanation:
We'll begin by converting 800 mL to litre (L). This can be obtained as follow:
1000 mL = 1 L
Therefore,
800 mL = 800 mL × 1 L / 1000 mL
800 mL = 0.8 L
Next, we shall determine the number of mole of NaCl in the solution. This can be obtained as follow:
Molarity = 2 M
Volume = 0.8 L
Mole of NaCl =?
Molarity = mole / Volume
2 = mole of NaCl / 0.8
Cross multiply
Mole of NaCl = 2 × 0.8
Mole of NaCl = 1.6 moles
Finally, we shall determine the mass of NaCl needed to prepare the solution. This can be obtained as follow:
Mole of NaCl = 1.6 moles
Molar mass of NaCl = 23 + 35.5
= 58.5 g/mol
Mass of NaCl =?
Mole = mass /Molar mass
1.6 = Mass of NaCl / 58.5
Cross multiply
Mass of NaCl = 1.6 × 58.5
Mass of NaCl = 93.6 g
Therefore, 93.6 g of NaCl is needed.
93,6 grams of NaCl is needed to prepare a 800ml of 2M sodium chloride.
Molar concentrationIn a 2M solution, there are 2 moles of the substance per 1 liter, that is, in 800 ml we have:
[tex]\frac{2 mol}{x mol} =\frac{1000 ml}{800ml}[/tex]
[tex]x = 1.6 mol[/tex]
Thus, 1.6 mol of NaCl is needed to prepare the solution.
Mass calculationTo calculate the mass in an amount of moles, we use the molar mass, so that:
[tex]MM_{NaCl}= 58.5g/mol[/tex]
[tex]m = MM \times mol[/tex]
[tex]m = 58.5 \times 1.6[/tex]
[tex]m = 93.6g[/tex]
So, 93,6 grams of NaCl is needed to prepare a 800ml of 2M sodium chloride.
Learn more about mole calculation in: brainly.com/question/2845237
How many grams are contained in 19.7 moles of Copper (III) Hydroxide?
Answer:
1912.1893280000002 or rounded to the nearest tenth is, 1912.19
Explanation:
Section
1
2
7)
Given the equation representing a reaction:
203Pb + 5921 TECn + on
3
4
5
Which type of reaction is represented by this equation?
6
A)
neutralization
8
-9
B)
polymerization
C)
substitution
10
11
12
13
= 14
- 15
16
-17
D)
transmutation
18
19
20
21
Answer:
a
Explanation:
neutalize acidity level