Answer:
0.5 M has the weakest concentration.
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to remember that the concentration, or molarity, of a solution is given in terms of moles per liters of solution.
In such a way, we can infer that the solution with the weakest concentration is the one with the smallest molarity, that is 0.5 M.
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Magnesium hydroxide is an ingredient in some antacids. Antacids react with excess hydrochloric acid in the stomach to relieve
indigestion.
a) balance the reaction that occurs between Mg(OH)2 and HCI.
(select choice) Mg(OH)2 + (select choice) HCI = (select choice) MgCl2 + (blank) H2O
b) what are the mole ratios that would be used to determine the number of moles of MgCl2 produced when HCl reacts with Mg(OH)2.
(blank) mol MgCl2/ (blank) mol Mg(OH)2
(blank) mol MgCl2/ (blank) mol HCI
Answer:
a. 2HCl + 1Mg(OH)2 → 1MgCl2 + 2H2O
b. 1 mol MgCl2/ 1 mol Mg(OH)2
1 mol MgCl2/ 2 mol HCI
Explanation:
a. The reaction of an acid (HCl) with a base (Mg(OH)2) produce water (H2O) and the salt (MgCl2):
_HCl + _Mg(OH)2 → _MgCl2 + _H2O
To balance the Cl:
2HCl + _Mg(OH)2 → _MgCl2 + _H2O
To balance the oxygen:
2HCl + _Mg(OH)2 → _MgCl2 + 2H2O
The reaction is now balanced
2HCl + 1Mg(OH)2 → 1MgCl2 + 2H2O
b. Based on the balanced reaction, the moles ratios are:
1 mol MgCl2/ 1 mol Mg(OH)2
1 mol MgCl2/ 2 mol HCI
1
Explain how adding crushed limestone reduces the acidity of the soil. Include a
general equation for the reaction.
Answer:
If a soil test indicates low magnesium, dolomitic limestone can be used to correct both the nutrient deficiency and pH. The value of limestone is in its ability to neutralize soil acidity. Limestone's properties differ considerably, and these differences influence the limestone's ability to neutralize soil acidity.
Explanation:
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Given the unbalanced equation: Li + N2 -> Li3N When the equation is
correctly balanced using smallest whole numbers, the coefficient of the
Lithium is
A.1
B.2
C.3
D.6
Answer:
D) 6
Explanation:
The balanced equation would be:
6Li + N2 -> 2Li3N
To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore, the correct option is option D.
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.
The other characteristic of balanced reaction is that physical state should be written with each compound or molecule on reactant and product side. Physical state should be written in brackets. s means solid, l means liquid, g means gas.
The skeletal equation is
Li + N[tex]_2[/tex] [tex]\rightarrow[/tex] Li[tex]_3[/tex]N
The number of atoms of nitrogen on reactant side is 2 while on product side it is 1 so to balance
Li + N[tex]_2[/tex] [tex]\rightarrow[/tex] 2Li[tex]_3[/tex]N
The lithium atom on reactant side is 1 while on product side it is 6, so to balance
6Li + N[tex]_2[/tex] [tex]\rightarrow[/tex] 2Li[tex]_3[/tex]N
The coefficient of the Lithium is 6.
Therefore, the correct option is option D.
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Help with science!!!!
Answer:
the answe would be (c) temperate continental
Explanation:
Which of the following claims about a binary compound in which the bonding is ionic is most likely to be scientifically valid?
A) Both elements in the compound are metals.
B) The atomic masses of the elements in the compound are relatively small.
C) There is equal sharing of electrons between the atoms of the elements in the compound.
D) The electronegativity difference between the elements in the compound is relatively large.
Answer:
There is ionic bonding between Mg2+ ions and NO3− ions. Which of the following claims about a binary compound in which the bonding is ionic is most likely to be scientifically valid? Both elements in the compound are metals.
Answer:
The answer is D.
Explanation:
A: not correct: one element is a metal and the other is a non-metal.
B: not correct: Fr could be combined with Cl
C: not correct: They are transferred not shared.
D: correct: Non-metals have a higher electronegativity in comparison to the metals with a low electronegativity which results in a great change in electronegativity.
How many moles are in 24.3g of iron (II) oxide?
Mark me Brainliest..... ......
NO LINKS please help!
Answer:
True True False
Explanation:
electronic configuration of transition metals
Explanation:
The electron configuration for the first row transition metals consists of 4s and 3d subshells with an argon (noble gas) core. This only applies to the first row transition metals, adjustments will be necessary when writing the electron configuration for the other rows of transition metals.
11. Write each step of uranium-240 undergoing first an alpha decay then two rounds of beta decay.
Pls HURRY HELPPP MEEEE
lanation:
ExpErnest Rutherford’s experiments involving the interaction of radiation with a magnetic or electric field (Figure 2) helped him determine that one type of radiation consisted of positively charged and relatively massive α particles; a second type was made up of negatively charged and much less massive β particles; and a third was uncharged electromagnetic waves, γ rays. We now know that α particles are high-energy helium nuclei, β particles are high-energy electrons, and γ radiation compose high-energy electromagnetic radiation. We classify different types of radioactive decay by the radiation produced.
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
210
84
Po
⟶
4
2
He
+
206
82
Pb
or
210
84
Po
⟶
4
2
α
+
206
82
Pb
'The function of an organism as a whole is organ of the combined activities and interaction of the constituent of the cells.' give reason
Answer:
Because organism is made up of organs
organs are made up of tissues
tissues are made up of cells
Therefore interaction of cells give outcome to tissue which further show's results in organs and to organ system and then to the body as a whole
Explanation:
When [H+] = 3.33 x 10-7 what is the ph?
Answer:
6.48Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log ([ {H}^{+} ])[/tex]
From the question we have
[tex]pH = - log(3.33 \times {10}^{ - 7} ) \\ = 6.477555...[/tex]
We have the final answer as
6.48Hope this helps you
I need help with science pls help me :(!
Which of the following best helps explain why an atom of Rb gas more easily loses an electron in a chemical reaction than an atom of Li gas?
Α. Rb has a higher electronegativity than Li has.
B. The Rb atom has a greater number of valence electrons than the Li atom has.
C. The nucleus of the Rb atom has a greater number of protons and neutrons than the nucleus of the Li atom has.
D. In the Rb atom the valence electron is farther from its nucleus than the valence electron of Li is from its nucleus.
Answer:
D
Explanation:
In the Rb atom the valence electron is farther from its nucleus than the valence electron of Li is from its nucleus
Joel is studying a certain organ system of the human body. It interacts with the respiratory system to transport oxygen and carbon dioxide gases between the lungs and different parts of the body. It interacts with the digestive system to transport nutrients throughout the body, and it interacts with the urinary system to remove wastes from the body.
What is Joel studying?
A. the nervous system
B. the circulatory system
C. the skeletal system
D. the muscular system
En qué consistió el experimento de Rutherford?
Answer:
The gold foil experiment
El experimento de la lámina de oro
Explanation:
what are specatator ions
Answer:
A spectator ion is an ion that does not participate in a chemical reaction and is found in a solution before and after a reaction.
Hope this helped :)
Why is it necessary for the triceps to be the contracting muscle when throwing
Explanation:
The triceps contract to allows the arm to extend and flex while throwing
help me pleaseeeee #5
Answer:
Red
Explanation:
.How many moles of NaCl are in 28.0 g?
Answer:
0.48 mols
Explanation:
to convert moles to mass u need to divide mass by the molar mass of NaCl which is 58.44g/mols.
28g ÷ 58.44g/mol = 0.48 mols
A sample of pure water contains
A. a smaller concentration of H3O+ ions than OH- ions.
B. a larger concentration of H3O+ ions than OH- ions.
C. equal concentrations of OH- and H3O+ ions.
D. neither OH- ions nor H3O+ ions.
What are the six atmospheric conditions that make weather?
mixture of same boiling point cannot be separated by using distillation why?
Answer:
both the substances will evaporate
Explanation:
Help meeeeeeeeeeewweeee
Reason:- The Mechanism of Diffusion In the case of food coloring in water, the water is the solvent while the food coloring is the solute. Once they've mixed, they make a solution. Diffusion takes time, though how much time depends on the kinetic energy of the molecules randomly bouncing among each other.
Hope This Helps You ❤️What does the respiratory system do?
Answer:
Your lungs are part of the respiratory system, a group of organs and tissues that work together to help you breathe. The respiratory system's main job is to move fresh air into your body while removing waste gases.
Answer:
Supply the body with Oxygen
Explanation:
The respiratory system helps remove waste gases and help you breath
(Your respiratory system consists of your lungs, mouth, and windpipe)
I need y’all’s help please
Answer:
6 mass
Explanation:
because the si unit of gram is mass
What happens to wavelength as wave frequency increases?
Answer:
As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.
Explanation:
What kind of nuclear reaction occurs in the following reactions?
Answer:
No 1 is fission
while no 2 is fusion
Fission is splitting on nucleus while fusion is forming heavier nucleus with nuclei
The kind of nuclear reaction that occurs in the following reactions are:
i. nuclear fission
ii. nuclear fusion.
What is a nuclear reaction?Nuclear reactions are that reactions in which a nucleus or nuclei collides with subatomic particles to form another, different nucleus. There are two types of collisions. Nuclear fission and nuclear fusion.
Nuclear fission is a process when large nuclei split and create small, numerous nuclei. It happens due to the instability of an atom. It split into two daughter nuclei.
Nuclear fusion is a process in which two or more small nuclei combine to create a large, heavy nucleus. The process releases a large amount of energy or can be absorbed.
Thus, the processes are i. nuclear fission
ii. nuclear fusion.
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A football is inflated to 12psi at 20°C What is the new pressure in the football
when the temperature is lowered to -5C
Answer: The new pressure is 3 psi.
Explanation:
Given: [tex]P_{1}[/tex] = 12 psi, [tex]T_{1} = 20^{o}C[/tex]
[tex]P_{2}[/tex] = ?, [tex]T_{2} = 5^{o}C[/tex]
Formula used is as follows.
[tex]\frac{P_{1}}{T_{1}} = \frac{P_{2}}{T_{2}}\\\frac{12 psi}{20^{o}C} = \frac{P_{2}}{5^{o}C}\\P_{2} = \frac{12 psi \times 5^{o}C}{20^{o}C}\\= 3 psi[/tex]
Thus, we can conclude that the new pressure is 3 psi.
PLS help its not that hard but I don't understand it. Its science not chemistry but they don't have science.
In this activity, you will construct two solar ovens and use thermometers to determine which oven gets the hottest. What engineering problem are you trying to solve?
Answer:
Conservation of resources. Saving energy and helping reduce carbon emission.
Explanation:
A liquid changes color as it cools and becomes solid. How can you confirm
the type of change that took place?
A. Determining that the mass of the solid and liquid are different
would confirm that a chemical change took place.
B. Identifying the solid and liquid as the same substance would
confirm that a physical change took place.
O c. The color change and the formation of a solid confirm that a
chemical change took place.
D. The formation of a solid from a liquid confirms that a physical
change took place.
Answer: Hello, There! your answer is Below.
D. The formation of a solid from a liquid confirms that a physical
change took place.
Explanation:
The change from the liquid state to the solid state is called freezing. As the liquid cools, it loses thermal energy. As a result, its particles slow down and come closer together. Attractive forces begin to trap particles, and the crystals of a solid begin to form.
Hope this helps you!!!
Have a great day!!!
When a liquid undergoes solidification and change of phase it is called freezing. The physical change can be confirmed by changes in the state of matter from liquid to solid. Thus, option D is correct.
What are physical changes?Physical changes are the modification in the matter or object that can be reversed back to its original state. They do not produce substances that are irreversible.
The change of the phase of the matter from liquid to solid when water substance undergoes freezing is a physical change as no new compound is created and the solidified substance can get converted back to liquid.
Therefore, option D. solid from liquid shows a physical change.
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