Answer:
Explanation:
Ca3N2
For certain, x is Calcium. It is the only element in bones that is a metal with an oxidation number of 2+
Nitrogen is a guess at this point, but we'll see what happens.
3Ca2+ = 3 * 40 = 120
2*N =2* 14 = 28
Total 148
% N = 28/148 * 100 = 18.9
As I said in the comments, there is a % missing and that is due to which periodic table you are using. All of them vary slightly. If you use the elements you get from your periodic table, the answer will turn out to be 19.97.
You will notice that my numbers are rounded, but are essentially correct. Any other guess for y will not give you a % of 19.97. Try it and see. For example if y = Cl
Then the chemical would be CaCl2
Ca = 40
Cl2= 71
Molar mass = 111.
y = 71 / 111 * 100 is 64% which is no where near 20%.
I don't know the answer to b, but I think that Nitrogen would be paramagnetic (it has 3 unpaired orbitals.) Calcium has two but I don't know how to classify it.
Plzzzz Help!!!!
What is the molarity of a solution that contains 1.45 moles of KCl in 1, 250 mL of
solution?
Molarity of the solution is 5.8M
Given :
moles of solute (n) = 1.45
Volume of solution (V) = 250 ml
WHAT IS MOLARITY ??
Molarity of a solution is defined as the number of moles of the solute dissolved per litre of the solution. It is represented as M . Thus a solution, which contains one gram mole of the the solution dissolved per litre of the solution is regarded as .
M = n of solute / Vol (L)
= [tex]\frac{1.45 * 1000}{100 * 250}[/tex] = 5.8 M
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En qué consistió el experimento de Rutherford?
Answer:
The gold foil experiment
El experimento de la lámina de oro
Explanation:
Help with science!!!!
Answer:
the answe would be (c) temperate continental
Explanation:
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
What type of matter can make solutions?
Answer:
Solutions can be solids dissolved in liquids. When you work with chemistry or even cook in your kitchen, you will usually be dissolving solids into liquids. Solutions can also be gases dissolved in liquids, such as carbonated water. There can also be gases in other gases and liquids in liquids.
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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I need help with science pls help me :(!
f
A fluorinated organic gas in a cylinder is com-
pressed from an initial volume of 930 ml at
156 Pa to 400 mL at the same temperature.
What is the final pressure?
Answer in units of Pa.
Answer:
Final pressure = 362.7 Pa
Explanation:
Given that,
Initial volume, V₁ = 930 ml
Initial pressure P₁ = 156 Pa
Final volume, V₂ = 400 mL
We need to find the final pressure. We know that the relation between volume and pressure is inverse i.e.
[tex]V\propto \dfrac{1}{P}\\\\\dfrac{V_1}{V_2}=\dfrac{P_2}{P_1}\\\\P_2=\dfrac{V_1P_1}{V_2}\\\\P_2=\dfrac{930\times 156}{400}\\\\P_2=362.7\ Pa[/tex]
So, the final pressure is equal to 362.7 Pa.
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
Marcus has a mass of 75 kg here on Earth. What would his mass be if he was standing on
the Moon?
Remember, gravity on Earth is 9.8 m/s2 gravity on the moon is 1.6 m/s2.
NO LINKS OR FILES PLEASE
Answer:
It is given that the mass of a man is 75 Kg in earth. Then his mass would be same in moon as mass of anything cannot be changed. The weight of the man in earth can be calculated by W=mg=75×9.8=735 N.
mixture of same boiling point cannot be separated by using distillation why?
Answer:
both the substances will evaporate
Explanation:
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:
An isotope has a half life of 5 minutes. How much of a 100 gram sample of this isotope is left after 20 minutes?
Answer:
6.25 gram
Explanation:
Applying,
R = R'([tex]2^{a/n}[/tex])................ Equation 1
Where R = Original mass of the isotope, R' = mass of the isotope left after disintegration, a = Total time, n = half life.
make R' the subject of the equation
R' = R/([tex]2^{a/n}[/tex])................. Equation 2
From the question,
Given: R = 100 gram, a = 20 munites, n = 5 minutes.
Substitute these values into equation 2
R' = 100/([tex]2^{20/5}[/tex])
R' = 100/[tex]2^{4}[/tex]
R' = 100/16
R' = 6.25 gram
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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A gas occupies 11.2 L at a pressure of 35.0 mm . What is the volume of the gas if it is Increased to a pressure of 64.0 mm Hg?
A) 6.13 L
B) 110.2 L
C) 200.0 K
D) 20.5 L
Explanation:
[tex]from \: boyle's \: law \\ P _{1} V _{1} = P _{2} V _{2} \\ 35 \times 11.2 = 64 \times V _{2} \\ V _{2} = \frac{35 \times 11.2}{64} \\ V _{2} = 6.125 \: L[/tex]
The volume of the gas is 6.13 l if it is increased to a pressure of 64.0 mm Hg.
Boyle's LawBoyle's law is a gas law which states that at constant temperature, the pressure of a given quantity of a gas varies inversely with its volume occupied by it.
According to the Boyle's Law:
PV = constant
Thus,
[tex]P_{1}V_{1} = P_{2} V_{2}[/tex]
where,
[tex]P_{1}[/tex] is the initial pressure
[tex]V_{1}[/tex] is the initial volume
[tex]P_{2}[/tex] is the final pressure
[tex]V_{2}[/tex] is the final volume
Now, put the values in above equation we get
[tex]P_{1} V_{1} = P_{2} V_{2}[/tex]
35.0 × 11.2 = 64.0 × [tex]V_{2}[/tex]
392 = 64.0 × [tex]V_{2}[/tex]
[tex]V_{2}[/tex] = [tex]\frac{392}{64}[/tex]
[tex]V_{2}[/tex] = 6.13 L
Thus, the volume of the gas is 6.13 l if it is increased to a pressure of 64.0 mm Hg.
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Which type of wave has a longer wavelength than infrared radiation but it's shorter than radio waves
Answer: Infrared rays
Explanation:
Can somebody please give me the IMF types of the following compounds?
NH3
HCL
CH4
My choices are Dispersion, Dipole Dipole, or Hydrogen Bonding.
Answer:
NH3 is Ammonia Which is Hydrogen Bonding
HCL is hydrochloric acid which is Dipole Dipole
CH4 is Methane which is Dispersion
Hydrogen chloride gas reacts with water to produce an acidic solution. The equation for
the reaction is shown.
HCI + H2O → CI + H2O
Which statement describes what happens during the reaction?
A The chloride ion is formed by accepting an electron from the water.
B The hydrogen chloride loses an electron to form the chloride ion.
C The water accepts a proton from the hydrogen chloride.
D The water donates a proton to the hydrogen chloride.
neid.
Answer:
C The water accepts a proton from the hydrogen chloride.
Explanation:
The equation given in this question where hydrogen chloride reacts with water is as follows:
HCI + H2O → CI- + H3O+
From this equation, hydrogen chloride (HCl) loses or donates hydrogen ion (H+) or proton to water (H2O), which accepts it to become hydronium ion. Hence, in a nutshell, water (H2O) accepts a proton (H+) from the hydrogen chloride (HCl) in this reaction.
Question 2 Mid-ocean ridges are formed along where two plates diverge under the water. O True O False
Answer:
TrueExplanation:
PLZ HELP!
Have you ever heard someone try to speak or make noise underwater? Describe the experience.
IN YOUR OWN WORDS PLZ! :D
Answer:
A few years back I back in 8th grade I head somewhat of a scream underwater, at first I was amazed at the sound but I suddenly realized how physically possible, the only way to make noise under water is to breath in the water and that can drown you, as I heard this I almost immeaditetly bolted out of the water and saw someone either trying to destroy their lungs themselves or being uneducated, they ended up stopping after a bunch of people started staring at them.
Explanation:
What are the six atmospheric conditions that make weather?
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 do the nuclei of H hydrogen atoms contain?
Answer:
brainliest plss
Explanation:
Most hydrogen atoms have a nucleus with only a single proton. About 1 in 10,000 hydrogen nuclei, however, also has a neutron; this particular isotope is called deuterium. An extremely rare hydrogen isotope, tritium, has 1 proton and 2 neutrons in its nucleus. ... Most hydrogen atoms have only a proton in the nucleus
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:
HAVE A GOOD DAY
What is the correct definition of a mixture?
Answer:
a substance made by mixing other substances together.
Explanation:
A mixture is a substance made by mixing two or more substances together.
it will help. have a good night
En 210 gramos de una solucion acuosa estan disueltos 12 gramos de nitrato de plata agno3 cuel es la concentracion porcentual en masa de la solucion
Answer:
%m/m = 5,71%
Explanation:
En este caso, estamos hablando de un ejercicio de porcentaje masa/masa, y debemos aplicar la siguiente expresión o formula:
%m/m = msto / msol * 100 (1)
Donde:
msto: masa de soluto, en este caso los 12 g de nitrato de plata.
msol: masa de solución, en este caso los 210 g.
%m/m: porcentaje masa/masa o concentración porcentual que nos piden.
Todo lo que debemos hacer ahora es reemplazar los datos que el ejercicio nos da en la expresión (1) y llegaremos a la respuesta:
%m/m = 12 / 210 * 100
%m/m = 0,057 * 100
%m/m = 5,71%Esta es la concentración porcentual de la solución.
Mucha suerte
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 ❤️help me pleaseeeee #5
Answer:
Red
Explanation:
When there are no decomposers, what happens to the grass?
Answer:
if there would have been no decomposers on Earth, the whole of the Earth would have been filled with dead and decaying matter of plants and animals.
Explanation:
I hope this helps :3
Answer: Imagine what would happen if there were no decomposers. Wastes and the remains of dead organisms would pile up and the nutrients within the waste and dead organisms would not be released back into the ecosystem. Producers would not have enough nutrients.
Explanation:
https://www.ck12.org/biology/consumers-and-decomposers/lesson/Consumers-and-Decomposers-MS-LS/#:~:text=Imagine%20what%20would%20happen%20if,would%20not%20have%20enough%20nutrients.
This is the site I got the info on, just so you know! I hope this helps!
When C20H42 cracked, each molecule produces one molecule of ethene,
one molecule of butane and two molecules of hydrocarbon E.
What is the molecular formula of E?
A CH13
B C,H14
C CH26
D C4H28
Answer:
D C4H28
Explanation: