Answer:
100 ml = 0.1 L
I divided 100 by 1000 because 1000ml = 1L
An increase in the temperature of a liquid decreases the rate of
evaporation, true or false?
Answer:
False
Explanation:
The increase in the temperature of a liquid also increases the rate of evaporation, as the same for the other way around. As intermolecular force increase rate of evaporation decreases. This happens because intermolecular force make it less likely for the molecules on the surface to escape from liquid and become vapour gas. As temperature increases rate of evaporation increases.
The chemical equation shows the production of magnesium chloride.
Mg + 2HCl → MgCl2 + H2
How many grams of H2 will be produced from 12 grams of Mg?
Answer:
1 gram of H2 will be produced from 12 grams of Mg.
Explanation:
According to Stoichiometry, 0.5 moles of Mg are present. 1 mole of Mg produces 1 mole of H2, so 0.5 moles of Mg will produce 0.5 moles of H2. Multiplying molar mass of H2 i.e. 2 gram/mole with 0.5 moles, we can find the mass of H2 in grams which is 1 gram.
N2(g) + 3 H2(g) + 2 NH3(g)
What is the mole-to-mole ratio between nitrogen gas and hydrogen gas?
Answer:
Notice that you have a 1:3. mole ratio between nitrogen gas and hydrogen gas. This means that, regardless of how many moles of nitrogen gas you have, the reaction will always consume twice as many moles of hydrogen gas.
Explanation:
Consider the below electrochemical cell at standard conditions. Which of the following changes
would result in a voltage larger than 1.29 V?
4MnO4- (aq) + 4H+ (aq) + 4MnO2 (s) + 3O2 (g) + 2H2O E° = 1.29 V
a. Increase the partial pressure of oxygen gas.
b. Increase the mass of solid manganese(IV) oxide present.
C. Increase the pH.
d. Increase the concentration of potassium permanganate.
girl i need help with this toofrom the electrochem lab :(
funny how i found this
Pls Help!
No links Please!
I also want an explanation
I will give brainliest
Answer:
uhhhhh not sure i cant see it
Explanation:
A 46 g piece of metal at 250C is placed in a calorimeter with 500. mL of water at 20C. If the final temperature was 24C, the specific heat of the metal is what?
A container is filled with a gas. The container has a wall controlled by a moveable piston. The
temperature within the container is held constant. The gas in the container has a pressure of 1.85
atmospheres and fills a volume of 4.64 liters. What will be the new volume of the gas if the pressure is
changed to 2.34 atmospheres?
Answer:
The new volume will be 3.67 L.
Explanation:
As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them fewer times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law which says:
"The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure"
Boyle's law is expressed mathematically as:
P*V=k
Now it is possible to assume that you have a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:
P1 * V1 = P2 * V2
In this case:
P1= 1.85 atmV1= 4.64 LP2= 2.34 atmV2= ?Replacing:
1.85 atm* 4.64 L= 2.34 atm* V2
Solving:
[tex]V2= \frac{1.85 atm* 4.64 L}{2.34 atm}[/tex]
V2= 3.67 L
The new volume will be 3.67 L.
Which of the following is a characteristic of a strong acid?
O A. It does not conduct electricity in water.
B. It completely dissociates in water.
C. It reacts with water to form H2 gas.
O D. It increases the OH concentration.
The statement, that describes the characteristic of a strong acid is "it completely dissociates in water."
What is a strong acid?
In aqueous solution, strong acids and bases are completely ionised.
A strong acid is one that entirely ionises in solution. When dissolved in water, it emits the maximum number of hydrogen ions or protons, implying that it always loses a proton (H+).
As a result, it is possible to deduce that a strong acid (HA) entirely dissociates in solution.
Hence the correct option is B.
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2K + Cl2 —> 2KCl
how many moles of KCl will be produced if you have 6.0 moles of K?
Answer:
6 moles
Explanation:
Balance the equation
KCIO3–> O2+ KCI
Answer: 2KCIO3–> 3O2+ 2KCI
Explanation:
Explanation:
2KCLO3=3O2+2KC
hope this helps
What element will lose electrons to form
An ion
Answer:
elements which are basic in nature or we can say that it is a metal so we conclude that it will loose electron or to form an ions
( copper is Cu) How many Copper atoms in 3CuSO 4
Need help ASAP !!!!!
What is the concentration if I have 200 mL of water and dissolve 13g of salt in it? Show your work!
Answer:
The concentration is 0.065g/mL
Explanation:
Given
[tex]m = 13g[/tex] --- mass of salt
[tex]V =200mL[/tex] --- volume of water
Required
Determine the concentration (C)
This is calculated as:
[tex]C = \frac{m}{V}[/tex]
[tex]C = \frac{13g}{200mL}[/tex]
[tex]C = \frac{13}{200}g/mL[/tex]
[tex]C = 0.065g/mL[/tex]
The concentration is 0.065g/mL
A relationship between two organisms that benefits both organisms is called
A. symbiosis
B.mutualis
C. commensalism
D.parasitism
Answer:
Mutualism
Explanation:
A relationship in which both benefit
Why are sodium ions good for making batteries?
The largest advantage of sodium-ion batteries is the high natural abundance of sodium. This could make commercial production of sodium-ion batteries less expensive than lithium-ion batteries. As of 2020, sodium ion batteries have very little share of the battery market.
Explain how observations differ from inferences?
How many moles are in 3 x 10^23 atoms of gold
Answer:
0.50 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
[tex]n = \frac{3 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{3}{6.02} \\ = 0.49833...[/tex]
We have the final answer as
0.50 molesHope this helps you
A scientist observed that in the presence of light, plants use carbon dioxide and water to make glucose and oxygen. This chemical process is called photosynthesis. Which type of energy is transformed into chemical energy, based on the scientist's observations? Answer options with 4 options A. light energy from the sun B. kinetic energy from water C. chemical energy from oxygen D. heat energy from the environment
Answer:
Option A, light energy from the sun
Explanation:
In the process of photosynthesis, the energy from sun in the form of light and heat is taken to undergo glycolysis and prepare glucose/starch (chemical).
Thus, the light and heat energy of sun is converted into the chemical energy.
Option B and C are incorrect because no kinetic energy or chemical energy is taken from any source.
Option D is also incorrect because heat is taken but it is not taken from the surrounding environment. The source of heat energy is sun.
Thus, only option A is correct
How many grams of CO2 are in 1.5L of a 1.2 M solution?
A. 0.8 grams
B. 1.25 grams
C. 35.2 grams
D. 55.0 grams
How many milliliters of 0.25 M solution of silver nitrate is needed to react with
sodium chloride to produce 7.6 g of silver chloride?
Answer:
To find molarity we must convert grams KCl to moles KCl and mL solution to L: ... EXAMPLE: What mass of potassium chloride would be needed to prepare 250.0 mL of a 0.500 ... EXAMPLE: Silver nitrate solution is added to 25.00 mL of a 0.500 M potassium chloride ... g) 0.655 g of sodium carbonate in 100.0 mL of solution.
Explanation:
In the star's center, the gas is so energized that it has become a sort of super gas, called plasma. The hot plasma is in constant motion. It expands like hot air inside a balloon and pushes outward from the center. Meanwhile, the crushing weight of the star material continues to press inward. In goes the outer material and out goes the inner. The plasma rolls and churns like a hyper hurricane of heat, light, sound, and motion. —A Black Hole Is NOT a Hole, Carolyn Cinami DeCristofano Which question would be a relevant to ask about this text? Why does the plasma in a star expand? Where can I take a hot-air balloon ride? Will there be a hurricane next week?
Answer:
A
Explanation:
Trust me I take the Quiz
Which of the following is a true statement?
Work is not needed to create electricity.
Electricity has the ability to do work.
All work requires electricity.
Electricity prevents work from occurring.
Answer:
Electricity has the ability to do work. b. hope dis helps
Explanation:
how many moles are in 4.3 grams of Cacl2
Answer:
0.038744323506090965
Explanation:
Round to whatever decimal point is needed for your answer.
what is the pOH of a solution with [H3O+] = 8.2 x 10-5M?
Answer:The pOH of the solution is 9.914
Explanation:
pH is given as the negative logarithm (base 10) of the hydronium ion concentration [H₃O⁺] that is
pH= - log [H₃O⁺]
Since we are given [H₃O⁺]=8.2 x 10⁻⁵,
pH=- log (8.2 x 10⁻⁵)
pH= 4.086
The pOH gives s the measurement of the concentration of OH− ions, Hence,
pH + pOH= 14
from the above calculation, we got pH=4.086
So
4.086 + pOH=14
pOH= 14 - 4.086
pOH= 9.914
The pOH of the solution is 9.914
In lab, a dialysis bag was filled with a 10% sucrose solution and placed in an unlabeled beaker filled with clear liquid. The dialysis bag was made of a semipermeable membrane that allowed the free passage of water, but was not permeable to sucrose. After two hours, the bag in the beaker decreased in size, lost volume, and became flaccid. Therefore, at the beginning of the experiment, the solution in the bag was ____________ compared to the solution in the beaker. g
Answer:
Of lower concentration or less concentrated
Explanation:
Osmosis is the movement of solvent from a region of lower concentration of solute to a region of higher concentration of solute through a semipermeable membrane in order to equalize the concentration of the solutions on both sides.
Since the membrane of the bag is semipermeable, then the fact that the bag in the beaker decreased in size, lost volume, and became flaccid indicates that the solution in the bag is of lower solute concentration than the solution in the beaker hence the movement of water molecules into the beaker by osmosis.
Which particles change the
charge in atoms when ions are formed?
Answer:
An ion is an atom or group of atoms with a positive or negative charge. Ions form when atoms lose or gain electrons to obtain a full outer shell: For elements in groups 1, 2 and 3, the number of electrons lost is the same as the group number.
Explanation:
If an atom loses or gets electrons, it transforms into a charged particle known as an ion. An ion has a charge equal to the sum of its protons' and electrons' charges.
What are electrons?Electrons is defined as the smallest and negatively charged among the atom's constituent particles. The charge moves from the positive terminal to the negative terminal as a result of the "electrical pressure" brought on by the voltage differential between the positive and negative terminals of a battery.
Depending on whether the number of electrons in an atom is greater or less than the number of protons in the atom, an atom can develop a positive charge or a negative charge. An atom is referred to as an ion when it is drawn to another atom due to an imbalance in its electron and proton numbers.
Thus, if an atom loses or gets electrons, it transforms into a charged particle known as an ion. An ion has a charge equal to the sum of its protons' and electrons' charges.
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Which forces can be represented in a free body diagram
A 40.0 liter gas tank contains 70.0 moles of hydrogen gas. What would be the volume of the tank which could hold 50.0 moles of hydrogen gas at the same temperature and pressure
Answer:
[tex]V_2=28.6L[/tex]
Explanation:
Hello there!
In this case, according to the given information, it is possible for us to solve this problem via the Avogadro's gas law as a way to understand the volume-moles behavior as a directly proportional relationship:
[tex]\frac{V_2}{n_2}=\frac{V_1}{n_1}[/tex]
In such a way, we solve for the final volume as shown below:
[tex]V_2=\frac{V_1n_2}{n_1} \\\\V_2=\frac{40.0L*50.0mol}{70.0mol}\\\\V_2=28.6L[/tex]
Regards!
Por qué los alimentos se dañan con mayor facilidad a temperatura ambiente que cuando están en la nevera?
Answer:
Esto se debe a que la heladera tiene mucha menor temperatura que la temperatura ambiente.
Esta menor temperatura ayuda a luchar contra los microorganismos que están en los alimentos (bacterias, hongos, etc) pues detiene en gran medida su repreduccion, la cual se ve maximizada en los rangos entre 5°C y 60°C, tal que la temperatura ambiente suele estar en el rango donde los microorganismos prosperan y se reproducen, es por ello que los alimentos se conservan mucho mejor en ambientes fríos (como la nevera) que en temperatura ambiente.
13. The equation used to find acceleration is a =
1. vf- vilt
b. v/t
a.
C. Vi - vlt
d. vit vflt
Acceleration represented by the equation = Δv/Δt.