Answer:
C. polarity
Explanation:
Water is polar that is why it is a universal solvent.
31 points PLS HELP!
Sedimentary rocks are formed by ...
Group of answer choices
Sediments being broken down over time
Sediment layers being compressed by the layers upon layers of sediment forming.
Sediments being cemented together.
All of the Above
Answer:
All the above I believe
Explanation:
Answer:
all of above!
Explanation:
Im pretty sure, because all of them happen when forming a sedimentary rock.
PLEASE HELP EMERGENCY ‼️‼️ needed ASAP
Answer:
the photo is kind of blurry i cant really see it, sorry
Explanation:
Base your answer on the equation and diagram below represent an electrochemical cell at 298 K and 1 atmosphere.
When the switch is closed, electrons flow from
A) Ag+(aq) to Mg2+(aq)
B) Mg(s) to Ag(s)
C) Ag(s) to Mg(s)
D) Mg2+(aq) to Ag+(aq)
When the switch is closed, electrons flow from the solid magnesium electrode, Mg(s) to solid silver electrode, Ag(s).
Electronegativity of metals
Electronegativity of metals refers to the ability of the atoms of metallic elements to attract electrons from the other metallic elements.
Electronegativity increases down the activity series.
Silver (Ag) will have more tendency to attract electron more than magnesium (Mg).
Thus, when the switch is closed, electrons flow from the solid magnesium electrode, Mg(s) to solid silver electrode, Ag(s).
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please help ME WITH CHEM I DONT HAVE ENOUGH TIME! calculate the number of hydrogen molecules that it would have contained at stp if it had a volume of 200,00m cubed.
We know that, at STP, one mole of a gas occupies 22.4 L of volume
we'll use the same principle to solve this problem
Converting given volume to Liters:
We know that 1 m³ = 1000 L
So, 20000 m³ = (20000)*(1000) L = 2 * 10⁷ L
Converting Liters to moles:
As mentioned above, at STP, one mole occupies 22.4 Liters
Number of moles in 2 * 10⁷ L = 2 * 10⁷ / 22.4
Number of moles = 8.9 * 10⁵ moles
Converting moles to number of particles:
We know that 1 mole contains 6.022 * 10²³ molecules
So, 8.9 * 10⁵ moles contain [(8.9 * 10⁵) * (6.022 * 10²³)] molecules
Number of molecules = 53.6 * 10²⁸ molecules
In proper scientific notation:
Number of molecules = 5.36 * 10²⁹ molecules
to make a large quantity of a 5% solution of HCl but only have 25mL HCl. what volume of 5% solution can be made from this volume of HCl?
Answer:What is the volume of 37% HCl?
If however you meant to say 0.025M and assuming you want to prepare 1L solution then the volume of 37% HCl needed should be= (1000 X 0.025X 36.5)/ (37X1.19X10)=2.07 mL diluted to 1 L using DI water. Good day. If you want 0.025 mole HCl solution, you should take a 2.09 ml of your acid.
Explanation:To prepare 5% solution from this acid; simply take 5 ml. of the acid and add it to 95 ml of distilled water.You get a 5%HCl solution. By the way, Hydrogen Chloride is the name designated to the gas evolved from HCl acid
To determine the volume of a 5% solution that can be made from 25 mL of HCl, we need to use the equation: C1V1 = C2V2
Where:
C1 = Initial concentration of HCl
V1 = Initial volume of HCl
C2 = Final concentration of the solution (5% or 0.05 in decimal form)
V2 = Final volume of the solution (unknown)
What is HCl?HCl stands for hydrochloric acid. It is a strong, highly corrosive acid that is commonly used in various industrial, laboratory, and chemical applications. In its pure form, hydrochloric acid is a colorless liquid with a pungent odor. It is composed of hydrogen (H) and chlorine (Cl) and is known for its acidic properties.
Let's plug in the known values:
C1 = 100% (since the initial HCl is undiluted)
V1 = 25 mL
C2 = 5% or 0.05
V2 = Unknown
Solving for V2:
C1V1 = C2V2
(1)(25 mL) = (0.05)(V2)
25 mL = 0.05V2
Divide both sides by 0.05 to isolate V2:
V2 = 25 mL / 0.05
V2 = 500 mL
Therefore, from 25 mL of HCl, you can make a 500 mL solution with a concentration of 5%.
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g A chemical equilibrium exists when: A chemical equilibrium exists when: there are equal amounts of reactants and products. the rate at which reactants form products is the same as the rate at which products form reactants. the sum of reactant and product concentrations equals one mole. reactants are completely changed to products. the rate at which reactants form products becomes zero.
Answer:
the rate at which reactants form products is the same as the rate at which products form reactants
Explanation:
There is still a reaction happening just that the second one happens the opposite happens and keeps it at net 0
How many moles of nitrogen are required to produce 13.5 g of NH 3?
Answer:
number of moles of (N) = 0.794 moles
Explanation:
From the given information:
no of moles of nitrogen (N) = (unknown)???
mass of nitrogen = 13.5 g
molar mass of NH3 = 14 +( 1 × 3) = 17 g/mol
To calculate the no of moles of N, we have:
number of moles of (N) = mass of N/molar mass
number of moles of (N) = 13.5 g/17 g/mol
number of moles of (N) = 0.794 moles
Please help will give brainliest
Perform the following
mathematical operation, and
report the answer to the correct
number of significant figures.
328 x 0.125 = [?]
Answer: 41.0
Explanation: When you multiply the two numbers you get 41 but you need to have the same amount of significant numbers as the number in the problem with the least significant numbers. I hope this helps
What physical property describes the ability of a substance to dissolve?
Answer:
solubility
Explanation:
What mass of aluminum sulfate is required to precipitate all of the Ba?? out of 45.0 mL of 0.548 M barium nitrate solution? 3 Ba(NO3)2 (aq) + Al2(SO4)3 (aq) --> 3 BaSO2 (s) + 2 Al(NO3)3 (aq)
Answer:
2.82 g
Explanation:
Step 1: Write the balanced precipitation reaction
3 Ba(NO₃)₂ (aq) + Al₂(SO₄)₃ (aq) ⇒ 3 BaSO₄(s) + 2 Al(NO₃)₃(aq)
Step 2: Calculate the reacting moles of Ba(NO₃)₂
45.0 mL (0.0450 L) of 0.548 M Ba(NO₃)₂ react.
0.0450 L × 0.548 mol/L = 0.0247 mol
Step 3: Calculate the moles of Al₂(SO₄)₃ that react with 0.0247 moles of Ba(NO₃)₂
The molar ratio of Ba(NO₃)₂ to Al₂(SO₄)₃ is 3:1. The reacting moles of Al₂(SO₄)₃ are 1/3 × 0.0247 mol = 8.23 × 10⁻³ mol
Step 4: Calculate the mass corresponding to 8.23 × 10⁻³ moles of Al₂(SO₄)₃
The molar mass of Al₂(SO₄)₃ is 342.2 g/mol.
8.23 × 10⁻³ mol × 342.2 g/mol = 2.82 g
How many grams of carbon dioxide will be produced if 76.4 grams of
C2H3Br3 reacted with 49.1 grams of O2? How many grams of the
excess reactant will be left after the reaction is over? Consider the
equation: C2H3Br3+O2 -> CO2+H2O+Br2
Answer:
Assuming that all of the oxygen is used up, 1.53×4111.53×411 or 0.556 moles of C2H3Br3 are required. Because there are only 0.286 moles of C2H3Br3 available, C2H3Br3 is the limiting reagent.
Limiting Reagent What is the limiting reagent if 76.4 grams of C2H3Br3 were reacted with 49.1 grams of O2? C2H3Br3 + 11O2 → 8CO2 + 6H2O + 6Br2 SOLUTION Using Approach 1: A. 76.4g × (1 mol/ 266.72 g) = 0.286 moles C2H3Br3 49.1g × (1 mole/ 32 g) = 1.53 moles O2 B.
Explanation:
MRK ME BRAINLIEST PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Map%3A_Introductory_Chemistry_(Tro)/08%3A_Quantities_in_Chemical_Reactions/8.04%3A_Limiting_Reactant_and_Theoretical_Yield
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Which statement best describes thermodynamics?
A. The study of how energy changes and moves
B. The study of physical laws acting on matter
C. The study of electricity at low temperatures
D. The study of intermolecular forces in liquids
Answer:
a
Explanation:
A catalyst is:
a chemical found in leaves
a chemical which promotes a chemical reaction
a chemical which reacts with sunlight
a cell with chlorophyll
[tex] \huge \mathrm{ \underline{Answer} ࿐}[/tex]
The correct option is B.
A Catalyst is a chemical which promotes or speed up a chemical reaction without undergoing any chemical reaction itself.
for example : potassium permanganate - Hydrogen peroxide will decompose into water and oxygen gas in the presence of KMnO4.
_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand notation as KHP. If 31.0 mL of a barium hydroxide solution are needed to neutralize 1.37 grams of KHP, what is the molarity of the barium hydroxide solution
Answer:
0.1082M of Barium Hydroxide
Explanation:
KHP reacts with Ba(OH)2 as follows:
2KHP + Ba(OH)2 → 2H2O + Ba²⁺ + 2K⁺ + 2P²⁻
Where 2 moles of KHP reacts per mole of barium hydroxide
To solve this question we must find the moles of KHP in 1.37g. With these moles and the reaction we can find the moles of Ba(OH)2 and its molarity using the volume of the solution (31.0mL = 0.0310L) as follows:
Moles KHP -Molar mass: 204.22g/mol-
1.37g * (1mol / 204.22g) = 0.006708 moles KHP
Moles Ba(OH)2:
0.006708 moles KHP * (1mol Ba(OH)2 / 2mol KHP) =
0.003354 moles Ba(OH)2
Molarity:
0.003354 moles Ba(OH)2 / 0.0310L =
0.1082M of Barium HydroxideSelect the correct answer.
Using this activity chart, which reaction will happen when a piece of copper is placed in a lead nitrate solution?
A.
2Cu + 3Pb(NO3)2 3Cu(NO3)2 + 2Pb
B.
No reaction occurs.
C.
2Cu + 3Pb(NO3)2 2Cu(NO3)2 + 3Pb
D.
3Cu + 3Pb(NO3)2 3Cu(NO3)2 + 3Pb
E.
The answer cannot be determined from the information given.
Answer:
B, No reaction will occur
Explanation:
Copper as compared to lead is less reactive. This is the reason when lead is added to copper nitrate solution, it replaces the copper and itself combines with nitrate to form lead nitrate aqueous solution
Lead + Copper(II) nitrate → Copper + Lead (II) nitrate
The same is not the case when the reaction is revered i.e Cu is added to Pb NO3 solution.
Hence, option B is correct
PLZ HELP ON TIMER WILL GIVE BRAINLIEST
How does technology limit the future of space exploration?
There are too many devices in space interfering with taking correct measurements.
Scientists cannot make contact with older satellites in outer space.
Scientists are able to work both with current and future technology.
Scientists must first develop certain technologies before missions can be completed.
Answer:
I would put the final answer choice: "Scientists must first develop certain technologies before missions can be completed"
Explanation:
The first option is partially true, but we have ways around it.
The second option is straight-up false.
The third option doesn't make much sense, how can one work with technology that will be developed in the future and doesn't yet exist?
Therefore, the fourth option is the best.
Hope this helps
-cyber
What is the volume, in cubic meters, of an object that is 0.21 m long, 4.7 m wide, and 5.3 m high?
Answer:
The formula for volume of a rectangle is length multiply by width multiply thus, 0.25 m multiply 6.1 m multiply by 4.9 m = 7.5m^3.
Explanation:
the least number of significant figures is 2 thus the final answer will have the same number of significant figures. 7.5m^3
How many liters of chlorine are needed to produce 5.64 moles of aluminum chloride? Need help ASAP
Answer:
190 L
Explanation:
Given that:
Number of moles = mass/molar mass
number of moles = 5.64
molar mass of aluminum chloride = 133.34 g/mol
∴
The balanced equation is:
2 Al + 3 Cl2 --> 2AlCl3.
From above reaction:
5.64 mole of AlCl3 reacts with 3 mole Cl2 to give 2 mole AlCl3
i.e
[tex](5.64 \ mole \ AlCl3) \times (3 \ mole \ Cl2 \ / \ 2 \ mole \ AlCl3)[/tex]
= 8.46 mole Cl2 gas.
At Standard temperature and pressure:
= (22.4 L/1 mole gas) * (8.46 mole Cl2)
= 190 L chlorine gas
TRUE or FALSE: The only way to see a recessive trait is to inherit 2 recessive
alleles.
Answer:
false it's more than two
What are the components of DNA?
A. ribose sugar, cytosine, guanine, adenine, thymine, and phosphate group
B. ribose sugar, cytosine, guanine, adenine, uracil, and phosphate group
C. deoxyribose sugar, cytosine, guanine, adenine, thymine, and phosphate group
D. deoxyribose sugar, cytosine, guanine, adenine, uracil, and phosphate group
Answer:
C
Explanation:
A-T G-C
Answer:
C
Explanation:
EDGE 2022
Calculate the Ka of a 0.35M weak acid with a pH of 4.2.
Answer:
Ka = 1.14x10⁻⁸
Explanation:
First we calculate [H⁺] from the pH:
pH = -log[H⁺][H⁺] = [tex]10^{-pH}[/tex][H⁺] = 6.31x10⁻⁵ MFor a monoprotic weak acid, the molar concentration of H⁺ of a solution can be expressed as:
[H⁺] = √(C*Ka)Where C is the molar concentration of the weak acid solution.
6.31x10⁻⁵ M = [tex]\sqrt{0.35M*Ka}[/tex]1.14x10⁻⁸ = KaDraw the most stable form of the major product in the reaction. 2 equivalents of an ester react with N a O C 2 H 5, followed by H 3 O plus and C 2 H 5 O H. The ester is a carbonyl bonded to a 3 carbon chain and O C H 2 C H 3.
Answer:
See answer below
Explanation:
This is a Claisen condensation. In the picture below you have the mechanism and final product.
Hope this helps
1. What is the kinetic energy of a cow that has a mass of 1500 kg and is moving at 4
meters per second?
Answer:
12000j
mass=1500kg
velocity=4m/s
Kinetic Energy (K E) = 1/2 mv^2
=1/2*1500(4^2)
=1*750*16
=12000j
A or B or C or D, plz answer fassttt
Answer:
A.
Explanation:
They'd probably want to know the conditions that usually produce fog
The rate of reaction was measured during a chemical reaction. After the first 3 seconds, the rate of reaction was 1.8 x10−6 M/s. Which of the following would you expect after another 3 seconds?
The question is incomplete, the complete question is;
The rate of reaction was measured during a chemical reaction. After the first 3 seconds, the rate of reaction was 1.8 x10−6 M/s. Which of the following would you expect after another 3 seconds? a
The rate would be higher, and the concentration of reactants would be lower.
b
The rate would be higher, and the concentration of reactants would be higher.
c
The rate would be lower, and the concentration of reactants would be lower.
d
The rate would be lower, and the concentration of reactants would be higher.
Answer:
The rate would be lower, and the concentration of reactants would be lower.
Explanation:
The rate of reaction refers to how quickly or slowly the reactants disappear or the products appear in a given reaction. The rate of reaction depends on the concentration of the reactants. Thus, as concentration decreases with time, the rate of reaction decreases accordingly.
Therefore, reaction rates tend to decrease with time since the concentration of the reactants decrease with time as the reactants are being converted into products. Thus after three seconds, the rate would be lower, and the concentration of reactants would be lower. Hence the answer above.
Answer:
The rate would be lower, and the concentration of reactants would be higher.
Explanation:
I took the test and i think i got it right
i think its D but i not sure so can yall pls help me
Answer:
I'm not really sure but I thinks its
A:veuns
What are some of the common characteristics for the elements in a group? Use examples to support your explanation.
Answer:
The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements
Explanation:
Elements are the simplest complete chemical substances. Each element corresponds to a single entry on the periodic table. An element is a material that consists of a single type of atom. Each atom type contains the same number of protons.
Which of the following involves a change in chemical properties
Answer: A chemical change occurs when the substance's composition is changed. When bonds are broken and new ones are formed a chemical change occurs.
True or False: A higher vapor pressure (evaporates easily) corresponds to strong intermolecular forces.
make a chemical reaction with molecules