Answer:
D. Quantitative
Explanation:
Quantitative observation deals with numbers, or amounts.
Qualitative observation deals with de- scriptions that cannot be expressed in numbers.
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 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:
I need y’all’s help please
Answer:
6 mass
Explanation:
because the si unit of gram is mass
I need help with science pls help me :(!
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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.
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.
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.
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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.
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.
explain why carbon dioxide is a gas, water is a liquid, and salt is solid at room temperature based on how the particals are held together.
Please help I'm having a hard time explaining this.
Answer:
Carbon dioxide is held together by weak intermolecular forces (only London dispersion LD) and is a non-polar molecule. Because of this weak attraction, it exists as a gas. Water on the other hand is polar (dipole forces DP), and has a stronger hydrogen bond existing within it (in addition to LD). This makes it attract itself more than say carbon dioxide molecules, so it commonly exists as a liquid. Finally, salt like water is polar, and has ionic bonds that are even stronger than a hydrogen bond. This makes salt have a great attraction to itself, sticking together as a solid because its molecules cant easily be broken up.
Explanation:
These are the strongest intermolecular forces ranked from strongest to weakest.
1. Network Covalent
2. Ionic
3. Hydrogen Bonding
4. Dipole Dipole
5. London Dispersion
help me pleaseeeee #5
Answer:
Red
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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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
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 ❤️En qué consistió el experimento de Rutherford?
Answer:
The gold foil experiment
El experimento de la lámina de oro
Explanation:
mixture of same boiling point cannot be separated by using distillation why?
Answer:
both the substances will evaporate
Explanation:
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:
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
What are the six atmospheric conditions that make weather?
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
NO LINKS please help!
Answer:
True True False
Explanation:
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:
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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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
Question 2 Mid-ocean ridges are formed along where two plates diverge under the water. O True O False
Answer:
TrueExplanation:
How many moles of silver would you have if you have 550 g of silver?
Answer:
5.1 mol
Explanation:
Silver's molar mass is 107.8682
550/107.8682=5.09881503539
Or if you round it's = 5.1
Answer:
5.0
Explanation:
https://www.convertunits.com/from/grams+Silver/to/moles
this is what I used, this maybe be useful later.
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
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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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
Help with science!!!!
Answer:
the answe would be (c) temperate continental
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.