Waves can transfer energy, but they...
1-always have the same wavelength
2-cannot carry sound
3-are unable to move through empty space
4-do not move matter
Answer:
A.
Explanation:
What does Hg mean on the periodic table
QUICKKK HELPPP ASAPP
Answer:
Element Mercury
Explanation:
Balancing Chemical Equation
hG0+cL2=HgCl+O2
Answer:
2HgO + Cl2 = 2HgCl + O2
Explanation:
Hence, balanced.
What are the correct coefficients if the law of conservation of mass is applied to the decomposition reaction as follows NH₄NO₃ ⟶ N₂O + H₂O
A.2,2,2
B.1,1,2
C.2,1,2
D.1,2,2
Answer:
B.1,1,2
Explanation:
Where are the protons and neutrons located in the atom?
Which statement best explains the economic effects of the situation
described in this passage?
There is a conflict between the United States and several
oil-producing countries in the Middle East. As a result,
these countries have refused to sell any gasoline to U.S.
businesses.
O A. The demand for oil in the United States has increased.
B. The supply of oil in the United States has decreased.
C. The supply of oil in the United States has increased.
O D. The demand for oil in the United States has decreased.
Answer:
Option B
Explanation:
As its conflict between US and middle East which are rich in gasolinesIf middle East stopped the supply then there must be a decrease in supply inside US.So option B is correct
5. How many moles of tin (II) fluoride are there in 908 g?
Answer:5.78
Explanation:
What element does Chlorine go in?
- metals
-not metals
-Metalloids
Answer:
non of them it is
halogen elements
describe something with numbers in science
Use the galvanic cell reaction to answer the question.
2Cr(s) + 3Cu2+(aq) → 2Cr3+(aq) + 3Cu(s)
Which half reaction occurs at the cathode? (1 point) plzz helpp
3Cu2+(aq) + 6e– → 3Cu(s)
2Cr(s) → 2Cr3+(aq) + 3e–
3Cu2+(aq) + 2e– → 3Cu(s)
2Cr(s) → 2Cr3+(aq) + 6e–
Answer: 3Cu2+(aq) + 6e– → 3Cu(s)
Explanation:
I took the test:)
The galvanic cell reaction is
2Cr(s) + 3Cu⁺²(aq) → 2Cr⁺³(aq) + 3Cu(s) then the half-reaction occurs at the cathode is - 3Cu⁺²(aq) + 2e⁻ → 3Cu(s)
A galvanic cell reaction is a redox reaction that takes place in two half-reactions oxidation and reduction. At anode oxidation reaction and at cathode reduction reaction takes place.
to identify the oxidized and reduced atoms we must assign oxidation states to all atoms.
reactant side:
For copper, it is in its ionic form: Cu⁺²
For chromium, it is in its atomic form: Cr⁰
Product side:
For copper, it is in its atomic form = Cu⁰
For chromium, it is in its ionic form = Cr⁺³
Each copper atom is reduced because its oxidation state decreases from +2 in the simple cation to zero in the metal.It means copper undergoes reduction.Thus, the Reduction half-reaction at cathode would be -
3Cu⁺²(aq) + 2e⁻ → 3Cu(s)
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compounds may be represented by chemical formulas. in the chemical formula for water which is h20, the 2 which represents the number of hydrogen atoms is called
Answer:
B) The subscript.
Explanation: In the chemical formula for water which is H20, the 2 which represents the number of hydrogen atoms is called subscript.
Which scenario involves a reaction that is at equilibrium?
A)The reaction is only producing products.
B)The reaction is producing more reactants than products.
C)The reaction is producing more products than reactants.
D)The reaction is producing reactants and products at an equal rate.
PLEASE HELPP AND QUICK!!! I WILL GIVE BRAINLIST!!
D)The reaction is producing reactants and products at an equal rate.
The scenario which involves a reaction at equilibrium is; The reaction is producing reactants and products at an equal rate. Option D is correct.
At equilibrium, the forward and reverse reactions of a chemical reaction occur at the same rate. It means the rate of formation of products from reactants is equal to the rate of formation of reactants from products. There is no net change in the concentrations of reactants and products over time, and the system is in a stable state. The concentrations of both reactants and products remain constant, and the reaction appears to have stopped.
In simple terms, at equilibrium, the reaction is balanced, and there is no preference for the formation of either reactants or products. The forward and reverse reactions are happening simultaneously at an equal rate, resulting in a dynamic balance between reactants and products. This state is represented by a double-headed arrow in chemical equations, indicating that the reaction is reversible and at equilibrium.
Hence, D. is the correct option.
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why does my science teacher have to be so evil honestly chemistry isnt tbat important for the majority of people
doing chem alone is fun but in school its not at all
Which piece of evidence is an indication that a chemical reaction has occurred?
boiling of a substance
a change in color of a substance
melting of a substance
freezing of a substance
Answer:
change of color of substance
Explanation:
I hope it helps
Although they both contain the same element, the metal copper (Cu)
and the compound copper sulfate (CuSO,) are very different substances.
Why can substances that contain the same element have very different
properties?
Answer:
because of the way they've bonded
Explanation:
Ionic bonding promotes the creation of a soluble salt. and high melting and boiling points
Covalent bonding promotes formation of molecules.
Polar covalent bonding promotes solubility in polar water
Metallic bonding promotes malleability, ductility, and ability to conduct heat and electric current.
according to this do they change
What is not one of the four main ingredients in beer?
Explanation: I don't have an answer, as this seems to be a multiple choice, without any choices given, however, the four main ingredients essential to making beer is water, yeast, barley, and hops. If this doesn't answer your question, some ingredients included in beer, but not needed, is orange peels, cinnamon, and berries/fruits.
Comment on this if you need further information, if this didn't answer your question!
What type of reaction is this? 2H2 + O2 ==>2H 20 + Energy
Answer:
Combustion
Explanation:
chemist has three different acid solutions. The first acid solution contains 15 % acid, the second contains 25 % and the third contains 70 % . They want to use all three solutions to obtain a mixture of 80 liters containing 30 % acid, using 2 times as much of the 70 % solution as the 25 % solution. How many liters of each solution should be used
Answer:
16L of 70% solution
32L of 25% solution
32L of 15% solution
Explanation:
x = volume of 70% acid solution
y = volume of 15% acid solution
2x = volume of 25% acid solution
2x + x + y = 80
3x + y = 80 (×8)
24x + 8y = 640 → 24x = 640 - 8y
0.7x + 0.25(2x) + 0.15y = 0.3(80)
⁷/₁₀.x + ¹/₂.x + ³/₂₀.y = 24
¹²/₁₀.x + ³/₂₀.y = 24 (×20)
24x + 3y = 480
(640 - 8y) + 3y = 480
640 - 5y = 480
5y = 160
y = 32
3x + 32 = 80
3x = 48
x = 16
the process of water decomposing to hydrogen and oxygen gases at room temperature and 1 atm pressure is spontaneous. true or false?
Answer:
False
Explanation:
the process of water decomposing to hydrogen and oxygen gases at room temperature and 1 atm pressure is spontaneous. true or false?
When hydrogen and oxygen react to form water, energy is give off.
to reverse the process, you need to add energy to water in order to form hydrogen and oxygen
be thankful for this..otherwise all water on the earth would spontaneously decompose to hydrogen and oxygen and there would be NO LIFE!
The process of decomposition of water into hydrogen and oxygen gases at room temperature is a false process.
What is decomposing reactions?A decomposition reaction is one in which one compound breakdown into two or more products.
The electrolysis of water results in the decomposing of water into hydrogen and oxygen.
It is a difficult process, cannot be done by heating alone.
Thus, the statement is false.
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What ion will be formed by the sulfur atom shown below when it has a stable set of
valence electrons or it satisfies the octet rule?
3- For the following redox reaction:
Cl2 (g) + 2Br (aq) → 2Cl (aq) + Br2 (g)
a. Write the oxidation half reaction and mention its oxidation number?
b. Write the Reduction half reaction and mention its oxidation number?
c. What is Oxidizing agent?
d. What is Reducing agent?
Chlorine is the oxidizing agent while bromine is the reducing agent in the reaction Cl2 (g) + 2Br- (aq) → 2Cl- (aq) + Br2 (g).
A redox reaction is one in which there is loss or gain of electrons. The oxidizing agent gains electrons while the reducing agent loose electrons. Hence oxidation is electron loss while reduction is electron gain.
Given the reaction;
Cl2 (g) + 2Br- (aq) → 2Cl- (aq) + Br2 (g)
The oxidation half reaction is;
2Br- (aq) → Br2 (g)
The oxidation number of bromine was increased from -1 to zero
The reduction half reaction is;
Cl2 (g) → 2Cl- (aq)
The oxidation number of chlorine was reduced from zero to -1
Hence, chlorine is the oxidizing agent while bromine is the reducing agent.
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Half the distance between the nuclei of two covalently bonded atoms is the ______, whereas half the shortest distance between the nuclei of identical nonbonded atoms is the ______.
Covalent radius refers to covalently bonded atoms while atomic radius refers to non-bonded atoms.
There are two terms that are easily confused for each other in chemistry, these are the covalent radius and atomic radius. Covalent radius refers to covalently bonded atoms while atomic radius refers to non-bonded atoms.
Hence, half the distance between the nuclei of two covalently bonded atoms is the covalent radius, whereas half the shortest distance between the nuclei of identical nonbonded atoms is the atomic radius.
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how do you solve this ?
1mol of Ba contains
[tex]\\ \sf\longmapsto 6.023\times 10^{23}atoms[/tex]
No of moles in 17atoms
[tex]\\ \sf\longmapsto \dfrac{No\:of\:atoms}{Avagadro\:no}[/tex]
[tex]\\ \sf\longmapsto \dfrac{17}{6.023\times 10^{23}}[/tex]
[tex]\\ \sf\longmapsto 2.82298\times 10^{-23}mol[/tex]
Option 2
Paul made a list about alkaline earth metals.
Alkaline Earth Metals
• gain two electrons
• are found in group two
• ions will be positive two
include elements Be, Mg, Ca
Paul made a mistake on his list. Which BEST describes the mistake Paul made?
A
Alkaline earth metals do not gain two electrons; they lose two electrons.
В
Alkaline earth metals are not found in group two, they are found in group one.
C
Alkaline earth metal ions will not be positive two; the ions will be negative two.
D
Alkaline earth metals do not include elements Be, Mg, and Ca; they include Co, Ni, and Cu.
2021 Illuminate Education Inc.
Answer:
answer is A. Alkaline metal lose two electrons not gain
Answer: im 99.99999% sure it is A
Explanation:
What are the three atomic particles found in an atom, and what are their charges?
Answer:
Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).How do patterns in atomic structure help us determine an element’s location on the periodic table?
Answer:
For this hands-on portion of the Atomic Structure Lab, students will be deciphering common trends or patterns found within the Periodic Table of Elements. The elements found within the Periodic Table are arranged in a very particular pattern, based on several common traits or characteristics. In 1869, Dmitri Mendeleev produced a table of elements based on their atomic weights. Properties of elements vary “periodically” depending on their atomic weight. Today, the elements of the Periodic Table are arranged by atomic number, which also indicates the number of protons in an atom (see Periodic Table Tutorial above). Neutrons are uncharged particles in the atom’s nucleus that only affect the overall weight of the atom, not the charge. The Periodic Table of Elements is arranged in horizontal rows, called periods and vertical columns, called groups.
Explanation:
A scientist finds several hundred fish fossils in the dessert. This evidence best supports which of the following scientific Ideas?
Which answer should I do?
Answer:
Explanation:
The only answer you can get would be that the area was once covered with water.
A glacier wouldn't allow the fish to move
Predators would likely eat more than they would leave behind as evidence.
If they developed limbs, at some of them would show up that way.
Drinking water should have sufficiently low levels of __________ to prevent disease. What is the missing word in this sentence?
Answer:
Microbes is ur answer. Hope it helps! Have a good day!
Explanation:
At its most basic level, heat is just...
(A)Light
(B)Energy
(C)Waves
Answer:
b
Explanation:
I think not for sure tho
Answer:
At its most basic level, heat is just
B energy
Explanation:
Why is this process significant? Mitosis is important in the production of alleles. Mitosis is important in the production of alleles. Mitosis is important for the production of diploid cells. Mitosis is important for the production of diploid cells. Meiosis is important in the production of haploid gametes. Meiosis is important in the production of haploid gametes. Meiosis is important in the production of clones
Meiosis is important because it ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes. Meiosis also produces genetic variation by way of the process of recombination. HOPE it helps
