Answer:
The correct answer is Mg
Please help with this , it’s very important
Explanation:
a) Cr is acid K is base
b) Ca is base and the other left part is acid
c)Ca is base and F2 is acid
d) NH4 is acid and SO4 is base
HELP PLEASEWhat is the molarity of 4.0 moles of sodium chloride (NaCl) in 125 mL of solution?
Hint: 1 L of solution = 1000 mL of solution
Question 19 options:
500 M
32 M
0.50 M.
0.032 M
The total mass of reactants and products is _______ during a chemical reaction
Answer: The total mass of reactants and products is the same during a chemical reaction.
Explanation:
the total mass of reactants is equal to the total mass of products.
The saturation point for a solution is 50.0 grams of solute per 500. grams of solvent. If you pour 70.0 grams of
solute into 800. grams of solvent, how many more grams of solute can you dissolve before reaching saturation?
Answer:
10.0g of solute before reaching saturation
Explanation:
A saturated solution is the solution that contains the maximum amount of solute that can be dissolved. In the problem, you can have
50.0g of solute / 500.0g Solvent
Now, in 800.0g solvent you can dissolve:
800.0g Solvent * (50.0g solute / 500.0g Solvent) = 80.0g of solute can be added
As you dissolve initially 70.0g of solute. You can add:
80.0g - 70.0g =
10.0g of solute before reaching saturationWhat is the rate of diffusion of NO gas to CO gas?
Answer:
0.97
Explanation:
Let R₁ represent the rate of diffusion of NO.
Let R₂ represent the rate of diffusion of CO.
Molar mass of NO (M₁) = 14 + 16 = 30 g/mol
Molar mass of CO (M₂) = 12 + 16 = 28 g/mol
Thus, the rate of NO to CO can be obtained as follow:
R₁ /R₂ = √(M₂/M₁)
R₁ /R₂ = √(28/30)
R₁ /R₂ = √(28/30)
R₁ /R₂ = 0.97
R₁ : R₂ = 0.97
NO : CO = 0.97
Therefore, the rate of diffusion of NO to CO is 0.97
During photosynthesis, plants incorporate atmospheric
Cinto more complex energy-storage
molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light
energy into
energy stored in the molecules.
Answer:
carbon dioxide
oxygen
**
During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.
What is Photosynthesis ?
It is the process by which plants , algae and some bacteria uses water from the carbon dioxide, air and soil and in this process food is prepared in the presence of chlorophyll and sunlight. In this process light energy converted to chemical energy.
Thus, we can say that During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.
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PLEASE ANSWER I GIVE BRAINLIEST AND MAX POINTS
Answer:
I believe the answer is A (changes in air temperature result in differences in air pressure which causes wind). Hope this helps
Explanation:
How symbols are made?
Answer:
Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).
Explanation:
Answer:
Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).
Explanation:
Describe the surgery that would be used to treat Kayla's condition. What are the risks of the surgery?
Answer:
By pass surgery.
Explanation:
Kayla is suffering with blocked artery. The doctors have tried to open up her blocked artery with injecting the stunt by angioplasty process. The treatment had been unsuccessful and she is still complaining chest pain. The next move of the doctors would be by pass surgery which will open up the blocked artery. There are many risks involved in this surgery. The patient may get into coma due to excess bleeding or she may die if her blood pressure shoots up during surgery.
Para este mismo ejercicio, si se administran 2.5 litros de está solución (2,500ml) en un intervalo de 24 horas que cantidad en gramos de paciente en un día?
Answer:
Se administran 2500 gramos de solución por día.
Explanation:
Dado
Volumen de la solución = 2,5 litros
Como sabemos 1 litro = 1000 gramos
Por lo tanto, 2.5 litros = 2500 gramos
Se administran 2,5 litros en un intervalo de 24 horas o 1 día.
De ahí que se pueda decir que se administran 2500 gramos de solución al día.
Calculate the current in amperes required to produce 18.0g of aluminium in 1.50hrs (al=27.og )
Answer:
35.7 A
Explanation:
Let's consider the reduction half-reaction of Al³⁺.
Al³⁺ + 3 e⁻ ⇒ Al
We will calculate the charge required to produce 18.0 g of Al using the following conversion factors.
1 mole of Al has a mass of 27.0 g1 mole of Al is formed upon the circulation of 3 moles of electrons1 mole of electrons has a charge of 96486 C (Faraday's constant)[tex]18.0gAl \times \frac{1molAl}{27.0gAl} \times \frac{3mole^{-} }{1molAl} \times \frac{96486C}{1mole^{-} } = 1.93 \times 10^{5} C[/tex]
1.93 × 10⁵ C circulate in 1.50 hours. The intensity is:
[tex]I = \frac{1.93 \times 10^{5} C}{1.50h} \times \frac{1h}{3600s} = 35.7 A[/tex]
Convert 3.01×10 23 molecules of H2O to moles.
Organize the following list of atoms from lowest to highest Electronegativity:
Beryllium, Barium, Strontium, Magnesium, Calcium
Answer:
Barium<Strontium<Calcium <Magnesium< Beryllium
Explanation:
Electronegativity is defined as the ability of an atom in a bond to attract the shared electrons of the bond towards itself.
Electronegativity is a periodic trend that decreases down the group and increases across the period.
Hence, if i want to arrange Beryllium, Barium, Strontium, Magnesium, Calcium in order of increasing electronegativity, i will have;
Barium<Strontium<Calcium <Magnesium< Beryllium
Pls answer this question 19 pls
Answer: The one direction where energy as heat will be initially transferred between the blocks is from block D to block A.
Explanation:
A substance like metal box that has high temperature will have more kinetic energy between its molecules due to which there will be more number of collisions between them.
Hence, it is able to transfer its heat energy more readily ac compared to a substance with low heat energy.
As a result, in the given diagram as temperature is increasing from block A to block B so heat energy will be transferred from block D to block A.
Thus, we can conclude that one direction where energy as heat will be initially transferred between the blocks is from block D to block A.
32.) What charge would you expect from a Group 17 atom when it becomes an ion?
a.) 1-
b.) 2-
c.) 2+
d.) 1+
A flexible camping tank has a sample of butane gas at 17.2 atm and has volume of 6.5L. What will be the volume if the pressure is adjusted to
6.4 atm?
Answer:
If the pressure is adjusted to 6.4 atm, the volume will be 17.47 atm.
Explanation:
Boyle's law says that the volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure. That is, if the pressure increases, the volume decreases while if the pressure decreases, the volume increases.
Mathematically, Boyle's law indicates that the product of pressure and volume always has the same value:
P*V= k
Analyzing an initial state 1 and a final state 2, it is satisfied:
P1*V1= P2*V2
In this case:
P1= 17.2 atmV1= 6.5 LP2= 6.4 atmV2= ?Replacing:
17.2 atm* 6.5 L= 6.4 atm* V2
Solving:
[tex]V2=\frac{17.2atm*6.5 L}{6.4 atm}[/tex]
V2=17.47 L
If the pressure is adjusted to 6.4 atm, the volume will be 17.47 atm.
What type of change occurs during a chemical reaction?
Answer:
physical change.
Explanation:
because it changes its physical attributes
As Earth's population continues to grow, so will the competition for our water supply. Describe three actions that our government could take to reduce competition for water use.
Answer:
Recycling waste water, awareness about efficient use of water and rain water harvesting.
Explanation:
Our government could take to reduce competition for water use by recycling waste water, awareness about efficient use of water and rain water harvesting are the methods which can reduce competition for water supply. Awareness in people about water bring great change and the people used water efficiently. Water should be harvested through making of reservoirs which collects water from rain which can be used for drinking as well as washing purpose. Recycling of waste water also increases the amount of water and reduce competition.
4 How can three liquids form something that resembles a solid? (Slime)
Answer:
Three liquids can form something that will resemble into a solid because it depends on which liquids you use and because all three things can work together to make it into a solid with the ingredients that are in all three liquids they will make into a beautiful piece.
Explanation:
This is the correct answer!!
How do you think the human population has changed over time? What makes you say that?
Answer:The world population increased from 1 billion in 1800 to 7.7 billion today. The world population growth rate declined from 2.2% per year 50 years ago to 1.05% per year. Other relevant research: World population growth – This article is focusing on the history of population growth up to the present.
Explanation:
3 L of a gas at 250 K is changed to a temperature of 300 K. What is the final volume?
Answer:
you can simply answer vl\t1=v2/t2
cultura de Australia ?
La cultura de Australia es una cultura occidental derivada principalmente de Gran Bretaña, pero también influenciada por la geografía única del continente australiano, la diversa aportación de aborígenes, isleños del Estrecho de Torres y otros pueblos de Oceanía. ... Los australianos son generalmente relajados, abiertos y directos.
8. In some reactions the process of oxidation and reduction takes place simultaneously. What are these
reactions termed as? Explain giving a suitable example.
2
Ans.
00
Answer:
zjtxxruxuxupm
Explanation:
fugilxltdptuszuourw passport RS a person Rd rseyozyoeToezyirzyorzrluziswzs the hell is going to thehdudb I have been a bit and then a email and your email find you by the way you can see the attached file is scanned image in PDF format and send it to the same
32 pts (Help Ive been desperately waiting for a hour plz answer) What are the units of Specific Heat?
A. temperature
B. density
C. mass
D. energy
Answer:
D
Explanation:
If I am not mistaken the unit is Joules which is a unit of Energy.
Answer:
A C and D. (The one that isn't is density).
Explanation:
I don't think you are going to like the answer very much. The definition tells you that Specific heat has units of
Joules/(°Kelvin * mass in kg)
The reason you won't like this much is because there are three answers
temperature: °KEnergy: JoulesMass: kgYou won't be able to separate them. Once in a while you get a question like this where the asker didn't know the subject matter well, but was likely a good programmer.
The one factor that a scientist changes during an experiment.
Answer:
The independent variable
Which of the following steps correctly converts 3 moles of fluorine to an equivalent number of particles of fluorine?
Group of answer choices
Divide Avogadro's number by 3.
Multiply 3 by Avogadro's number.
Multiply 3 by the atomic mass of fluorine.
Divide the atomic mass of fluorine by 3.
Answer:
B) Multiply 3 by Avogadro's number
Explanation:
This is according to Study.com
3 moles of fluorine contains 18.066✖10²³ Particles. thus, option B is correct
How many are there no. of particles in 1mole?One mole contains 6.022✖10²³ particles.
3 moles of flourine contains 3✖6.022✖10²³ particles
Hence, option “B” is correct
learn more about moles.
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What is the approximate vapor pressure when the gas condenses at 70°C?
150
5
760
380
Answer:
380
Explanation:
I couldn't find the answer anywhere so this is the correct answer. I got it graded.
Which element has 16 neutrons, 15 protons, and 15 electrons?
Answer:
phosphorus
Explanation:
Answer:
phosphorus
Explanation:
phosphorus has to lose electrons
¿en que estado de agregacion se encuentra un cuerpo con forma y volumen propio?
Answer: Um what is it?
Explanation:
1. How are rates of chemical change expressed?
Explanation:
The rate of reaction is expressed as decrease in concentration of reactant or increase in product per unit time. It is also defined as the increase of concentration of the product per second.
Answer:
Explanation:
Reaction rate, in chemistry, the speed at which a chemical reaction proceeds. ... It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.
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