Answer: liquid boiling is a reversable chemical change.
Explanation: you can alter the temperature to prevent it from boiling
cual es la longitud de una taza con aceite???? AYUDA ES URGENTE!!!
Answer:
1 taza = 250 ml eso creo
Explanation: Eso creo jejejejeje.
Burning fossil fuels adds more oxygen to Earth’s atmosphere, increasing carbon in abiotic matter and decreasing carbon in biotic matter. True or False (GIVING BRAINIEST)
Answer:
False
Fossil fuels add carbon dioxide to the atmosphere not oxygen
Knowing how electrons behave in metallic materials, describe why metals make great conductors of electricity
Answer:
Metals are an excellent conductor of electricity and heat because the atoms in the metals form a matrix through which outer electrons can move freely. Instead of orbiting their respective atoms, they form a sea of electrons that surround the positive nuclei of the interacting metal ions.
Explanation:
Clouds are named for 3 different attributes including shape, _____________ & precipitation. *
A. size
B. color
C. elevation
D. smell
Answer:
color is there right answer for this question please make me a brainliest and follow me please please please please
pls answer thank you
Answer:
6.5 – 8.5
Explanation:
Chlorine reacts in a similar way to bromine. Suggest a reason why.
Elements in the same group have similar properties because their electron configurations are similar. In particular they have the same number of valence electrons, which are the in the outermost (highest energy) s and p orbitals.
Chlorine reacts in a similar way to bromine as they belong to same group of periodic table.
What is chemical reactivity?Reactivity in chemistry is indeed a measurement of how easily a material reacts chemically. The chemical may react alone or in conjunction with neighboring atoms as well as compounds, and in either case, energy will typically be released. The most reactive substances and elements have the potential to spontaneously or explosively ignite.
Since bromine and chlorine electron configurations are similar, elements of the same group exhibit comparable characteristics. The amount of valence electrons, that are located inside this outermost (highest energy) p and s orbitals is particularly similar.
Therefore, chlorine reacts in a similar way to bromine as they belong to same group of periodic table.
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5HCl what are the number of elements that 5HCl has ?
Answer:
Penta hydrogen chlorine
Explanation:
they are ploy atomic elements
In which state(s) of matter are the
particles free to move at Gut relative to
one another?
18.What are the similarities between a mixture and a solution?
Answer:Mixture comprises two or three compounds that aren't fused chemically. They have no physical interactions
and A solution contains two substances that are chemically mixed to form a new compound.
Assume a reaction takes place in a basic solution to form the given products:
MnO4–(aq) + Cl–(aq) MnO2(s) + Cl2(g) (unbalanced)
Balance the given half-reactions for atoms and charge:
MnO4– + H2O MnO2 + OH–
Cl– Cl2
Help Please T-T
Answer:
There is no hydrogen in the first half reaction
Why do you sound weird when you hold your your nose and talk?
Answer:
People with a nasal voice can sound as though they're speaking through a clogged-up or runny nose, which are both possible causes. Your speaking voice is created when air leaves your lungs and flows upward through your vocal cords and throat into your mouth. The resulting sound quality is called resonance. (i hope i helped ya )
Explanation:
What is the volume of the water?
0 points
Captionless Image
Answer:
the value of water is
6000
Answer:
600 or 6000 I'm not sure
Someone pls help me with this I will make you brain
Answer:
g(x) has the greater slope
how many sodium ions designated as dissolved?
One of the ions has a positive charge (called a cation) and the other has a negative charge (termed anion). Salt is an ionic compound, consisting of a crystal, lattice structure of the two ions Na+ and Cl-.
Define the terms: i proton neutron iii electron. b An atom X has a proton number of 19 and relative atomic mass of 39. i How many electrons, protons and neutrons are there in atom X? ii How many electrons will there be in the outer electron shell of atom X? iii What is the electronic configuration of atom X?
Answer:
i.Electron should be 19,Proton should also be 19,Neutron should be 20
ii.The outer electron shell should have 9 electrons
iii.Electron Configuration [Ar] 4s¹
The word "continental" means that the air mass formed over ____________.
A. land
B. an ocean
C. mountains only
D. a pond
Answer:
over land is the correct ☑ answer plz mark me as brainliest
have a great day ahead
Please help
What rock layer marks the end of the dinosaurs?
Question 1 options:
Burgess Shale layer
Mesozoic Layer
KT Boundary layer
The rock layer which marks the end of the dinosaurs is: C. KT Boundary layer.
A rock can be defined as a solid material containing minerals, which are naturally formed through the following processes:
Weathering. Plate tectonic activity. Erosion.Basically, a rock comprises of various layers which marks the age of both living and nonliving organisms, these includes:
I. Burgess Shale layer.
II. Mesozoic Layer.
III. KT Boundary layer.
Dinosaurs refers to a taxa of carnivorous or herbivorous archosaurian reptiles that are often very large and belongs to the Mesozoic era.
Basically, the Mesozoic Layer is a rock layer which marks the period when dinosaurs were still roaming the earth some million years ago.
However, dinosaurs went into extinction at the KT Boundary layer and as such it is a rock layer which marks the end of the dinosaurs.
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How many electrons does helium have on the periodic table?
Answer:
Two Electrons.
Explanation:
Helium is the second element of the periodic table and thus is an atom with two protons in the nucleus. Most Helium atoms have two neutrons in addition to the protons. In its neutral state, Helium has two electrons in orbit about the nucleus. Model of a helium atom's nucleus with two protons and two neutrons.
Hope This Helps!
Answer:
The answer to your question is two electrons.
Explanation:
In its neutral state, Helium has two electrons in orbit about the nucleus.
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Answer: k = 5
Explanation:
k = the number of units that f(x) was moved up to get g(x).
We can see from the graph that f(x) was moved five units up.
So k = 5.
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#1. Boyle's Law. A gas with a volume of 4.0 L at a pressure of 205 kPa is allowed to expand to a volume of 12.0 L.
What is the pressure in the container if the temperature remains constant? (Answer is 68.3 kPa).
Explanation:
According to Boyles law[tex]pressure \: \alpha \frac{1}{volume} [/tex]
P1V1 = P2V2
205 (4) = P2 (12)
[tex]P2 = \frac{205 \times 4}{12} [/tex]
P2= 820/12
P2= 68.3 KPa
The pressure in the container after the expanssion of gas, if the temperature remains constant is 68.3 kPa.
What is Boyle's Law?According to the Boyle's Law, at constant temperature pressure of any gas is inversely proportional to the volume of the gas, i.e.
P ∝ 1/V
Required equation for the calculation of the pressure is:
P₁V₁ = P₂V₂, where
P₁ = initial pressure = 205 kPa
V₁ = initial volume = 4 L
P₂ = final pressure = ?
V₂ = final volume = 12 L
On putting all these values on the above equation, we get
P₂ = (205)(4) / (12) = 68.3 kPa
Hence resultant pressure is 68.3 kPa.
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Tina says, “A solution can have only two different kinds of particles.” Deepa says, “A solution can have many different kinds of particles.” Whom do you agree with? Explain why.
Answer:
Explanation:
Pick up a soft drink. The CocaCola I have has 8 ingredients and is a mixture. Mind you, it is hard to tell what kind of sugar is present because three are listed.
It certainly has more than 2 ingredients.
Which of the following atoms will have the
most similar properties to the atom shown
below?
Atoms that have the same number of valence electrons (belong to the same group of the periodic table) have similar properties. Hydrogen and Helium are exceptions. The first shell is filled with 2 electrons which makes Helium a Noble Gas and Hydrogen is a gas thus not a Group 1 metal.
The given atom has 2 valence electrons (a group 2 element).
∴ the atoms with similar properties to that of the given atom would also have 2 valence electrons:
I - filled 1st shell thus noble gas ❌
II - 3 valence electrons ❌
III - 4 valence electrons ❌
IV - 2 valence electrons ✅
∴ atom IV has similar properties to the given atom.Checking my answer:
If we check the periodic table, the atom given is Be (Alkali Earth Metal)
I is He (Noble Gas)
II is Bo (Group 13)
III is C (Group 14)
IV is Magnesium (Alkali Earth Metal)
convert 2 butanol to 2 nitrobutane
The conversion of 2 - butanol to 2 - nitrobutane involves conversion of 2 butanol to 2 - bromobutane and subsequently to 2 - nitrobutane.
In order to convert 2 - butanol to 2 - nitrobutane, an SN2 reaction is first carried out in which 2 - butanol is converted to 2 - bromobutane. This reaction proceeds with inversion of configuration at the chiral carbon as expected.
This product is subsequently reacted with silver nitrite in ethanol to yield 2 - nitrobutane along side silver bromide. Some alkyl nitrite is also produced as a by product. The components of the mixture are separated by fractional distillation. The scheme of the reaction is shown in the image attached to this answer. This reaction is only applied to primary and secondary alkyl halides.
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Calculate the mass of scheelite that contains a million oxygen atoms
Answer:The mass of scheelite having one million oxygen atoms is. Explanation: We are given: Number of oxygen atoms = (million atoms). According to mole .
Explanation:
What is a common disease caused by a fungus?
A.
common cold
B.
HIV/AIDs
C.
athlete's foot
D.
pneumonia
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
The Correct choice is : C
Athlete's foot is one of the common disease caused by a fungus !
Explain why it was important for scientists to have a standard system of naming compounds and other chemical procedures.
It is important for scientists to have a standard system of naming compounds and other chemical procedures to avoid ambiguity in the nomenclature of chemical compounds and procedures.
Chemicals may be referred to by various names among various scientists in different places. These different names creates confusion when scientists present their discoveries to other scientists outside their locality.
Therefore, it is imperative that a unified and standard system of nomenclature should be devised so that all scientists can have the same name for compounds. This reduces ambiguity associated with the nomenclature of chemical substances and procedure.
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Jonah is filling out paperwork for insurance and in the “applicant occupation” space he writes cartographer. What does Jonah’s job entail?
Group of answer choices
plotting celestial objects on a graph
creating maps of the sky by dividing the celestial sphere into 88 different areas
creating geographic maps of continents and countries
planning the route that planes will fly in the sky
Explanation:
creating geographic maps of continents and countries
Jonah is filling out paperwork for insurance and in the “applicant occupation” space he writes cartographer so, his job is creating geographic maps of continents and countries, hence option C is correct.
Who is cartographer ?A person who draw and produce a map is a cartographer. Cartography is the art and science of graphically representing a geographical area, usually on a flat surface such as a map or chart.
This may involve the superimposition of political, cultural, or other nongeographical divisions onto the representation of a geographical area.
A person whose work is making maps or charts is a cartographer. An example of a cartographer is Claudius Ptolemy and his book Geographica . Anaximander was the first ancient Greeks to draw the map of known world.
Hence, cartographer creates the geographical maps.
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The charge of electron cloud of Atom x equals to - 4x10to the power-18 C, write the atomic representation knowing that it has 30 neutrons.
Answer:
the most common oxidation no.of manganese is + 2 + 3 + 4 + 6 + 7
Explanation:
How many sub atomic particles are there in an atom?
Answer:
The are mainly three kinds of subatomic particles in an atom:
1) Electrons (negatively charged particles)
2) Protons (positively charged particles)
3) Neutrons (neutral particles)
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807______ is the chemical reaction between oxygen and energy storage molecules, such as glucose, that releases energy into cells.
Answer:
cellular respiration
Explanation:
Summary. Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP