Answer:
Because.in theory, it's impossible for philosophers (Greeks) don't have the proper equipment and also they don't have enough facts to back it up
Explanation:
Hope this helps
An element cannot ________. a be part of a homogeneous mixture b be a pure substance c interact with other elements to form compounds d be part of a heterogeneous mixture e be separated into other substances by chemical means
Answer:
b be a pure substance
Explanation:
Calculate the no. of moles in 25gm of calcium phosphate
PLz Fast
answer/
1 grams Calcium Phosphate to mol = 0.00322 mol
no. of moles= 0.00322×25
no. of moles = 0.0805
Tell electronic configuration of Copper?
Answer:
1s22s22p63s23p64s23d9
Explanatihe neutrlon:
Tell electronic configuration of Copper?
Copper is atomic # 29 so it has 29 protons.
The neutralatom must have 29 negative charges to balance the 29
positive charges, so it has 29 electrons.
Our electron configuration must account for all 29 electrons
Look at a Periodic Table
cture from
find copper #29
let us "AUF-BAU" ( buld up) the copper electronic configuration from the Periodic Table.copper #29 is in th 4th row.
To "build up", start at row 1. this is the 1st energy level. there are noly 2 elements H and He, so it is only an "s" robital. with 2 e's. so
1s2ve 2 e's in an s orbital and 6 in p orbitals,
at row 2 (energy level 2) we have 2 e's in an s orbital and 6 in p orbitals, so
building on top of row 1, we have
1s22s22p6
at row 3 we repeat and so have
1s22s22p63s23p6
at row 4 we start with 2 e in an s orbital at the 4th energy level, so we
have
1s22s22p63s23p64s2
we now enter the d orbtals, and copper has 9 electrons in the d orbitals.
but these d orbitals are only slightly at energy level 4. because of their more complex shape, most of the orbital is in the 3rd energy level, so
we buld up for copper, #29
1s22s22p63s23p64s23d9
count the electrons and add them:
2 + 2 +6 +2 +6 +2 +9 = 29 copper's number
what is the hydrogen ion concentration of oven cleaner?
Answer:
Bases are substances that dissolve in water to release hydroxide ions ... Chalk and oven cleaner are examples of familiar products that contain bases
what is the density of a rock with a volume of 5 mL and a mass of 13.5
0.37 g/mL
67.5 g/mL
2.7 g/mL
13.5 g/mL
Answer:
Density is 2.7 g/ml³
Explanation:
[tex]density = \frac{mass}{volume} \\ [/tex]
mass » 13.5 g
volume » 5 ml³
[tex]density = \frac{13.5}{5} \\ \\ = 2.7 \: {g \: ml}^{ - 3} [/tex]
Answer:
[tex]\boxed {\boxed {\sf 2.7 \ g/mL}}[/tex]
Explanation:
Density is a substance's mass per unit volume. The formula for calculating density is as follows.
[tex]\rho= \frac{m}{v}[/tex]
The mass of the rock is 13.5 grams and the volume of the rock is 5 milliliters.
m= 13.5 g v= 5 mLSubstitute these values into the formula.
[tex]\rho= \frac{13.5 \ g}{5 \ mL}[/tex]
Divide.
[tex]\rho= 2.7 \ g/mL[/tex]
The density of the rock is 2.7 grams per milliliter.
The formula F= 9/5C + 32
changes a temperature reading from the Celsius scale C to the Fahrenheit scale F. What is the temperature measured in degrees Fahrenheit when the Celsius temperature is 10 (DEGREES) C?
Answer:
yes it is c=mxb okay
Explanation:
necesito ayuda con esto y si es necesario con procedimientos, gracias
Answer:
sorry but I don't understand Spanish
otherwise I will definitely helps you
I don't understand Spanish but you can do this :)
Explain the geometry of PCl5 molecule and account for its high reactivity
Answer:
In PCl5, in addition to equitorial bonds which lie in the same plane ,there are axial bonds. Since it suffers more repulsion it is longer than the other bonds. Also these are weak bondsand therefore these bonds can break easily . Because of these reasons,PCl5 is very reactive.
To express very large or very small numbers, scientists use what
write the chemical formula for the following compound -magnesium chloride, zinc sulphide Sodium,sodium sulphate, calcium bicarbonate.
Answer:
magnesium chloride: MgCl2
zinc sulphide: ZnS
sodium sulphate: Na2SO4
calcium bicarbonate: Ca(HCO3)2
Can someone please help me with this
Answer:
Explanation:
cant see the screen really
600mL of a gas at 27◦C and 1atm pressure is heated to 177◦C. What pressure Must be applied to the gas in order to maintain the same volume?
Answer:
gkfbhs DC hdshgagfzh
An _____
is an explanation of data that is based on facts
Answer:
Theory.
Explanation:
It is called a theory.
HELP! Fill in the blanks:
The net charge of an atom is equal to the difference between the_____
in the atom's nucleus and the_____
Answer:
I don't know
Explanation:
is today your test
what will happen to the atoms or sbstance when it is condenses
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Condensation happens when molecules in a gas cool down. As the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules. Finally these molecules collect together to form a liquid.
Hope it helps!
Brainliest pls!
Follow me! :)
Arrange the elements in order of increasing ionization energy. chlorine, fluorine, gallium, phosphorus
Answer: Ga, P,Cl, F
Explanation:
Cl 1314 kJ/mole
F 1681 kJ/mole
Ga 579 kJ/mole
P 1012 kJ/mole
matter is not created or destroyed in any chemical or physical
a. law of conservation of mass
b. chemical change
c. physical change
d. wood
Answer:
a
Explanation:
everything can be broken down to a smaller less useful compounds but never destroyed
summarize why error is important.
What can we say about
protons?
A. They are in the nucleus and never
leave.
B. They move around outside the nucleus.
C. They move in and out of the nucleus.
Answer:
A. They are in the nucleus and never leave.
Explanation:
Protons as well as neutrons are located in the nucleus of the atom.
hope this helps!
What net force is required to acceleterate car at a rate of 2 m/s² if the car has a mass of 3,000 kg
Answer:
6000N
Explanation:
Force = Mass x Acceleration
= 3000 x 2
= 6000 kg m/s^2 or 6000N
Answer:
[tex]\boxed {\boxed {\sf 6000 \ Newtons}}[/tex]
Explanation:
We are asked to calculate a net force. According to Newton's Second Law of Motion, force is the product of mass and acceleration.
[tex]F= m \times a[/tex]
The mass of the car is 3,000 kilograms and the acceleration is 2 meters per second squared.
m= 3000 kg a= 2 m/s²Substitute the values into the formula.
[tex]F= 3000 \ kg * 2 \ m/s^2[/tex]
Multiply.
[tex]F= 6000 \ kg * m/s^2[/tex]
Convert the units. 1 kilogram meter per second squared is equal to 1 Newton. Our answer of 6000 kilogram meters per second squared is equal to 6000 Newtons.
[tex]F= 6000 \ N[/tex]
The net force required to accelerate a 3,000 kilogram car at 2 meters per second squared is 6000 Newtons.
4.4 x 10^-9
What’s this in standard form or scientific notation
Answer:
How to Convert a Number to Standard Form
Move the decimal point in your number until there is only one non-zero digit to the left of the decimal point. ...
Count how many places you moved the decimal point. ...
Write your scientific notation number as a x 10b and read it as "a times 10 to the power of b."
Explanation:
The slope of the line represents a quantity called density. If rise represents the y-axis and run
represents the x-axis, what is the formula for density?
Answer:
Density equals Mass over Volume
Explanation:
D=m/v
WILL MARK BRAINLIEST
Removing the pulp (solid) from the orange juice using a juice strainer.
a chemical change
b Physical change
Taking into account the definition of physical change and chemical change, the correct option is option b. removing the pulp (solid) from the orange juice using a juice strainer is a physical change.
Two types of changes can be distinguished: physical changes and chemical changes.
A physical change is a change that makes something different without changing the composition of the material.
In other word, a physical change is a transformation in which the nature (composition) of matter does not change, so that the substances involved are the same before and after the change.
On the other hand, chemical changes are considered to be those in which the substances involved are transformed into totally different ones.
In other words, chemical changes refer to the process that involves one or more substances that become new substances with different nature and properties.
In this case, removing the pulp (solid) from the orange juice using a juice strainer is a physical change because the pulp and the orange juice are the same before and after the change and their properties do not change.
In summary, the correct option is option b. a physical change.
Learn more:
brainly.com/question/14537837?referrer=searchResults brainly.com/question/19134005?referrer=searchResultswill mark brainliest if correct
Which methods separate a mixture according to the size of the particles?
a
filtration and chromatography
b
distillation and chromatography
c
filtration and evaporation
d
distillation and evaporation
Answer:
filtration and chromatography
Explanation:
I hope this will help you :-)
The jewelers' mass unit for diamond is the
carat. By definition, 1 carat equals ex-
actly 200 mg.
What is the volume of a
1.07 carat diamond? The density of diamond
is 3.51 g/cm
Answer in units of cm".
Answer:
0.75 cm
Explanation:
You will convert 1.07 carat into mg then into g. You will multiply its reciprocal by 3.51g/cm to get the answer.
What is a net ionic equation?
Answer :
a chemical equation in
which the electrolytes in aqueous
solution are expressed as dissociated
ions.
Have good day !!
Decomposition of bark of bracket fungi
a
Chemical Change
b
Physical Change
Answer:
Both.
Explanation:
In decomposition, two processes occur. Firstly, because of chemical change the colour of the top layer is transformed. And secondly, due to first reaction it turns into bark and it's a physical change.
So both the changes are the part of decomposition reaction.
The decomposition of the bark of fungi is a chemical change. So the correct option is A.
What is decomposition?The word decomposition literally means “to break down”. The process usually relates to the disintegration of the complex organic matter into a simpler inorganic matter. It is a very significant and essential process of the ecosystem.
Hence, decomposition is a metabolic process, performed by living organisms. They take up raw materials in the form of complex compounds, turn process and then convert it into simpler compounds.
Bacteria, fungi, and a few other microorganisms are known as decomposers and they can initiate the process of decomposition. They survive on dead organisms by feeding on them.
The dead and decaying animals and plants are able to serve as raw materials. Upon their breakdown, they produce nutrients, carbon dioxide, water, etc. Dead animals, plants, and their remains are called detritus. This detritus is used by plants and are collectively known as saprophytes.
Therefore, the correct option is A.
Read more about decomposers, here
https://brainly.com/question/896544
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Which type of bond and how many bonds would occur as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA?(1 point)
three metallic bonds
two ionic bonds
four covalent bonds
one covalent bond
Answer:
four covalent bonds
Explanation:
Answer: four covalent bonds
Explanation:
Which type of bond and how many bonds would occur as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA?
three metallic bonds
two ionic bonds
four covalent bonds
one covalent bond
Four covalent bonds are formed as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA.
The periodic table is composed of eighteen groups and eight periods. The common thread that holds all the elements in a group is that they all have the same number of valence electrons in their atoms. The elements in the same period all have the same highest energy level.
Oxygen in group Group VIA has six valence electrons while carbon in group Group IVA has four valence electrons. Hence, the chemical bond in carbon dioxide CO2 must contain four covalent bonds as shown in the image attached to this answer.
https://brainly.com/question/13178080
Answer:
Four Covalent bonds
Explanation:
Which of the following statements is not true about ecosystems?
a. A healthy ecosystem can support an unlimited number of life forms.
b. Predators play a role in balancing the earth's ecosystems.
c. People's activities can improve the health of an ecosystem.
d. The parts of an ecosystem depend on each other.
Answer:
A
Explanation:
though an ecosystem can support life forms,when they become over populated or unlimited there will be competition for food,Shelta and other basic necessities which will lead to many of these life forms dying