Answer:
Hydrogen bonding
Explanation:
Water is a compound found readily in nature. It is made up of interatomic forces of covalent bonds that connects the hydrogen and oxygen bonds together in a definite ratio.
The intermolecular forces are responsible for the physical properties of substances. These forces allows a compound to behave in certain ways. In water, the intermolecular bonding present are the very strong hydrogen bonds. For this bond type, the hydrogen of one water molecule is firmly attached to the oxygen of another water molecule. The bonds are very strong forces.Help plz I have to get this done before 2:30 The diagram shows different forms of thermal energy transfer.
Which process is making the pot's handle hot?
O A. Conduction
B. Radiation
OC. Insulation
D. Convection
Answer:
Conduction.
Explanation:
Answer:
O A. Conduction
Explanation:
The other person did it
When 3.5 moles of sodium oxide react, how many moles of sodium hydroxide will be produced?
moles NaOH *Report your answer to the
correct number of significant digits!
Na2O + H2O -> 2 NaOH
Answer:
7 moles of NaOH will produced.
Explanation:
Given data:
Number of moles of sodium oxide = 3.5 mol
Number of moles of sodium hydroxide produced = ?
Solution:
Chemical equation:
Na₂O + H₂O → 2NaOH
Now we will compare the moles of sodium oxide with sodium hydroxide.
Na₂O : NaOH
1 : 2
3.5 : 2/1×3.5 = 7
7 moles of NaOH will produced.
A sample of silver metal contains 1.91 X 1021 atoms. How many moles of silver is
this?
Answer:
1.91×1021/6.023×10^23
Explanation:
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When ionic compounds are added to water, they dissociate or break apart into ions. In the case of table salt, salt added to water dissociates into sodium ions and chloride ions. This would seem to be a chemical change. However, scientists do not consider this to be one, because the solid table salt remains after the water is evaporated. The atoms recombine into their original arrangement once the water is removed.
Which word from the selection helps you understand that physical changes can be undone?
a added
b dissociate
c recombine.
d removed
ОА
H+ HH
O H+ H → He
Oc He+
TH
Не
ODH +
Η
>
Ao H+HH OH
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how can i identify an element by the number of protons?
The number of proton is the atomic number of an element. Every element has a unique atomic number.
Answer:
the number of proton is equal
Calculate the molar mass of B(NO3)3 ?
The molar mass of B(NO₃)₃ - Boron nitrate : 196.822 g/mol
Further explanationIn stochiometry therein includes
Relative atomic mass (Ar) and relative molecular mass / molar mass (M)
So the molar mass of a compound is given by the sum of the relative atomic mass of Ar
M AxBy = (x.Ar A + y. Ar B)
The molar mass of B(NO₃)₃ - Boron nitrate :
M B(NO₃)₃ = Ar B + 3. Ar N + 9.Ar O
M B(NO₃)₃ = 10.811 + 3. 14,0067 + 9. 15,999
M B(NO₃)₃ = 196.822 g/mol
Write equilibrium constant (KC) for the following reactions
1. N2(g) + O2(g) ⇌ 2NO(g)
2. N2(g) + 3H2(g) ⇌ 2NH3(g)
3. 2SO2(s) + O2(g) ⇌ 3SO3(g)
4. 2Fe(S) + 4H2O(g) ⇌Fe3O4(s) +4H2(g)
The equilibrium constant(Kc) is equal to the concentration of the products over the concentration of the reactants, and each coefficient of the compound in an equilibrium state
Further explanationThe equilibrium constant or Kc is the value of the concentration product in the equilibrium state of the substance in the right segment divided by the product of the substance in the left section, each of which has a reaction coefficient raised
solid (s) and liquid (l) have no concentration, so these two phases are not involved in the equilibrium constant KC (given the value = 1).
The equilibrium constant based on concentration (Kc) in a reaction
pA + qB -----> mC + nD
[tex]\tt Kc=\dfrac{[C]^m[D]^n}{[A]^p[B]^q}[/tex]
1. N2(g) + O2(g) ⇌ 2NO(g)
[tex]\tt Kc=\dfrac{[NO]^2}{[N_2][O_2]}[/tex]
2. N2(g) + 3H2(g) ⇌ 2NH3(g)
[tex]\tt Kc=\dfrac{[NH_3]^2}{[N_2][H_2]^3}[/tex]
3. 2SO2(g) + O2(g) ⇌ 3SO3(g)
[tex]\tt Kc=\dfrac{[SO_3]^3}{[SO_2]^2[O_2]}[/tex]
4. 2Fe(S) + 4H2O(g) ⇌Fe3O4(s) +4H2(g)
[tex]\tt Kc=\dfrac{[H_2]^4}{[H_2O]^4}[/tex]
Is the Food Pyramid important to Humans and our Digestive Systems? Explain why or why not below please use a complete sentence, or put what the one thing that we cannot digest but is in the food pyramid.
Answer:
The food pyramid is just to make people have a healthier "Diet."
Explanation:
It shows the food groups we eat and which ones to put together to make a healthy diet. Eating the right amount of each food group is called a "Balance" diet. Therefore, its not needed, but it is useful.
Can someone help me out with this thanks!
Answer:
a) Hydrogen and Fluorine
b) Lithium and Oxygen
c) Potassium and Phosphorus
d) Nickel and Oxygen
e) Mercury and Chlorine
Explanation:
The capital letters in the compounds represent a single element, while some elements have one capital letter and one small letter after it.
a) H & F
b) Li & O
c) K & P
d) Ni & O
e) Hg & Cl
Which end of the H-F molecule will be partially positive?
neither end
the fluorine end
both ends
the hydrogen end
Answer:
the hydrogen end
Explanation:
In H - F molecules there is a charge separation. Hydrogen has partial positive charge on them and Fluorine has a partial negative charge on it.
The bonds between H - F molecule is a covalent bond. In this bond, both atoms share their electrons to attain a stable configuration But the electrons are not shared equally. Fluorine is more electronegative compared to the hydrogen. Fluorine therefore, attracts the shared electrons more closely to itself. This makes fluorine more negative and hydrogen positive.Which substance in the table below will heat up the fastest? water helium diamond or glass
Answer:
Helium will heat up the fastest
Explanation:
Why do the electron clouds around a central atom stay as far apart as possible?
Electron pairs around a central atom arrange themselves so that they can be as far apart as possible from each other. The repulsion between negatively charged electrons pairs in bonds or as lone pairs causes them to spread apart as much as possible
Explanation:
I have 1.8066 x 1024 atoms of Calcium, how many grams of calcium do I have?
Answer: 1849.9584
Explanation:
Select the correct answer.
What are the oxidizing agent and the reducing agent in this chemical equation?
3FeS + 8HNO3 → 3FeSO4 + 8NO + 4H2O
A.
FeS is the oxidizing agent, and HNO3 is the reducing agent.
B.
HNO3 is the oxidizing agent, and NO is the reducing agent.
C.
FeS is the reducing agent, and HNO3 is the oxidizing agent.
D.
HNO3 is the reducing agent, and NO is the oxidizing agent.
Answer:
Its answer choice C
Which element would most likely bond with lithium and form an ionic compound?
Answer:
(Please make sure to re-write this on your own to make sure that your teacher doesn't think your cheating!) Fluoride.Explanation:Ionic bonding is the type of bond that is made between a nonmetal and a metal. In this type of union, one of the elements yields electrons and the other accepts electrons.
In this case, the metal is Lithium, we need a nonmetal to complete the union. (Don't know if you need this or anything but here you go)
Beryllium is a metal.
Calcium is a metal.
Fluoride is a nonmetal.
Sodium is a metal.
After the analysis, we conclude that the correct answer is Fluoride since it is the only one that is a nonmetal.
Which best describes electromagnetic waves moving from gamma rays to radio waves along the electromagnetic
spectrum?
A) Wavelength and frequency decrease.
B) Wavelength and frequency increase.
C) Wavelength increases, and frequency decreases.
D) Wavelength decreases, and frequency increases.
Answer:
Wavelength increases, and frequency decreases.
for my lazy friends its letter C
Explanation:
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The statement 'wavelength increases and frequency decreases' best describes electromagnetic waves moving from gamma rays to radio waves (option C).
What is wavelength?The term wavelength makes reference to the distance between the picks of the waves in the electromagnetic spectrum.
The wavelength and frequency can be used to understand the dynamics of electromagnetic waves.The frequency of a wave refers to the period of oscillation within an electromagnetic spectrum.In conclusion, the statement 'wavelength increases and frequency decreases' best describes electromagnetic waves moving from gamma rays to radio waves (option C).
Learn more about electromagnetic waves here:
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What characteristic do atoms in the same group of elements share?
1 - they have the same number
2 - they have similar physical property
3 - they have the same atomic mass
4 - the same number of electrons orbitals
Answer:
2 option
Explanation:
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What is the best method of eye protection in laboratory?
Answer:
goggles
Explanation:
...................
How did conservatism affect the nationalist movements in Europe?
A.
It promoted the overthrow of absolute monarchies.
B.
It forced nationalist leaders to adopt socialism.
C.
It delayed or extended nationalist struggles.
D.
It emphasized the rights of individuals over nations.
Answer:
The answer is C. (It delayed or extended nationalist struggles.)
Explanation:
Hope this helps!
Label each of the following properties of sulfur as either á physical or chemical property.
Use the definition of a physical property and chemical property to back up your answer.
1. It reacts with hydrogen when heated
2. It is a yellow solid at room temperature
3. It is soluble in carbon disulfide
4. Its density is 2.97 g/cm3
5. It melts at 113°C
Answer:
Explanation:
1. It reacts with hydrogen when heated
Chemical property
2. It is a yellow solid at room temperature
Physical property
3. It is soluble in carbon disulfide
Chemical property
4. Its density is 2.97 g/cm3
Physical property
5. It melts at 113°C
Physical property
Physical properties tells us everything about what substance is when no change is occurring to its constituents.
It can be observed using apparatus and instruments. Examples are state of matter, color, odor, taste, texture, hardness, solubility in water, density, melting point and boiling point
Chemical properties are those properties that tell us about what a substance can do as regards to whether or not the substance reacts with other substances. Examples are flammability, rusting of irons, precipitation, decomposition of water by an electric current.
What Group is this element in?
Please answer （＾∇＾）
Write the names of the following covalent compounds: SiO2
Answer:
Silicon dioxide
Explanation:
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO₂, most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand.
The name of the following covalent compound: SiO₂ is silicon oxide.
What is the name of the covalent compound?The name of the covalent compound is silicon oxide. Note that covalent compounds are known for their ability to share electrons. This is the case with the compound, silicon oxide that shares electrons with oxygen.
In the compound, there are two atoms of oxygen and one atom of silicon.. So, the name of the compound is silicon oxide.
Learn more about covalent compounds here:
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A 25.0 mL sample of 0.100 M lactic acid (HC3H503, Ka = 1.4 E-4) is titrated with 0.100 M NaOH solution. Calculate the pH of the resulting
solution after 0.0ml of NaOH have been added
WORTH 20 POINTS PLZZZ HELP WILL GIVE BRANLIEST PLZZZ
A toaster transforms P energy into Q energy.
What do P and Q most likely represent?
P represents electrical energy, Q represents thermal energy
P represents thermal energy, Q represents electrical energy
P represents chemical energy, Q represents radiant energy
P represents radiant energy, Q represents chemical energy
Answer: P represents electrical energy, Q represents thermal energy.
Explanation: The toaster takes electrical energy from the electrical socket through wires and converts that into thermal energy that heats up/toasts the bread.
Answer:
P represents electrical energy, Q represents thermal energy
Explanation:
I am sorry if I get this wrong, but when I put it in the sentence - A toaster transforms electrical energy into thermal energy - it made sense to me, so I think that is the answer. I am sorry if this does not help.
What is the main product of cellular
respiration?
Answer:
The main products are ATP, carbon dioxide, and water.
A strand of DNA has the following order of bases: CGTATGCA. What is the matching ( complimentary) strand
Answer:
GCATACGT
Explanation:
A=T
G=C
C=G
T=A
This key goes with any complementary DNA strand.
Hope this helps you out!
Argue the importance of chemistry to the field of materials science.
(short answer)
Explanation:
Chemistry, however, plays the primary role in materials science because it provides information about the structure and composition of materials. Materials scientists study the structures and chemical properties of various materials to develop new products or enhance existing ones.
Answer:
the other person is right.
Explanation:
What Is the atomic mass of the element shown? 14 Si silicon 28.1
A. 56
B. 14
C. 42.1
D. 28.1
Answer:
28.1
Explanation:
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5. How many moles of calcium atoms are in each mole of calcium carbonate? (1 point)
Answer:
One mole of calcium is present in one mole of calcium carbonate
Explanation:
Because its formula is CaCO3
Ca contains 2+ charge and CO3 contains 2- charge