Find the mass of an object with 30 cm3 and has a density of 2 g/cm3 (input number only)
formation of a precipitate
formation of gas (without heat)
color change
Answer: 60 g
Explanation: Mass is the product of density and volume.
Density (2 g/cm^3)
Volume (30 cm^3)
(2 g/cm^3)*(30 cm^3) = 60 g
Which of the following atoms would be an ion?
O A. An atom with 8 protons and 8 neutrons.
OB. An atom with 5 protons and 5 electrons.
C. An atom with 11 protons and 9 electrons.
D. None of these
Reset Selection
Answer:
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1-How does the Law of Conservation of Energy explain why ice cubes melt in water?
2-What are the two differences between mass and weight?
3-Why does an object’s weight change on the moon but its mass stays the same?
4-Explain how two objects that have the same mass can have different densities.
5-How can you tell if a mixture is homogeneous (solution) or heterogeneous (not a solution)?
6-Identify each of the following examples below as either a homogeneous mixture (solution) or a heterogeneous mixture.
7-What are 3 methods you can use to separate a mixture? Give an example of each.
8-What is the difference between an atom and a molecule?
9-Is a compound a mixture or a pure substance?
10-How are elements arranged on the Periodic Table? by increasing
atomic number.
Answer: 1.The water molecules in the liquid phase have more energy than the molecules in the solid phase. The reason that the ice melts is that some of the energy in the water is transferred to the ice – this provides the heat necessary for the transition from the solid to liquid phase
what is the shape of sf6
Answer:
answer........of the question
Which of the following contains only one
type of atom?
A. element
B. solution
C. compound
Answer:
A. elements
I hope it's helps you
Answer:
A i think
Explanation:
A rabbit has a mass of 2kg. What is its weight
Answer:
weight = Mass × gravity
P= m × g
P=mg
Weight (P) = ? , Mass (m) = 2 kg , gravity (g) = 9.8 m/s²
P= mg
p = 2 × 9.8
P= 19.6 kg.m/s²
P= 19.6 N
I hope I helped you^_^
Cells contain parts known as organelles these parts are specialized. What does this mean?
Answer:
because they devlop our organs
If 2.0 g of hydrogen gas combines with an excess of chlorine gas to form 72.9 g of hydrogen chloride, what mass of chlorine is used in the reaction?
Explanation:
Eqn of Reaction
H2 + Cl2 == 2HCl
Mass of HCl=72.9g
Mass of H2 = 2.0g.
Moles of HCl = Mass/Molar Mass
n = 72.9/36.5
n=1.997 moles of HCl was produced.
Now from the balanced eqn of reaction...
2moles of HCl is produced when 1moles of Cl2 reacts.
So
1.997moles of HCl would produce.....
1.997 x 1/2 moles of Cl2
0.999moles of Cl2 is gotten.
n(Cl₂) = mass/Mm
Mass = Mm x n
n=0.999moles
Molar Mass(Mm)= 35.5 x 2= 71g/mol ( You multiply by 2 cuz Chlorine is a diatomic gas).
Mass = 0.999 x 71
Mass = 70.929g of Chlorine.
An easier and swifter way to look at this is
From the Law of Conservation Of Mass.
The Mass of reactants MUST equal those of products in a simple chemical reaction since Matter is neither created nor destroyed in this scenario.
So The product Was 72.9g of HCl
Therefore
The Sum of both reactants Must equal this value.
We're already given the value of H₂ =2g
Therefore...
Chlorine should be undoubtedly 70.9g.
Hope this helps.
Have a great a day Amigo✅
The neutrons within the nucleus of an atom have what charge?
A)negative.
B)same as an electron.
C)same as a proton.
D)no charge.
Answer:
the answer is D.
Explanation:
your welcome :)
Answer: D). No Charge
Explanation: The neutrons within the nucleus of an atom have no charge.
7.In which state of matter molecules have more energy to vibrate.
Answer:
Solid, liquid or gas. So there is movement no matter the state. The key variable is density. The higher the density the less movement. In solids the motion can be so small it's very hard to measure. Gas on the other hand is easy the motion being large. Bear in mind temperature plays a big role. Higher temps bring faster motion. Finally the pressure of the gas brings about less motion the higher it is as the molecules are closer together & can't move as much.
Explanation:
A block of wood that is 3 cm on each side has a mass of 27 g. What is the density of the block? ( using sig figs )
Answer:
desity =mass /volume
27/ 3cube
1g/cm³
What happens to the molecules of a compound when it changes state from liquid to solid
Answer:
they lose energy. because of that, they slow down and get closer together
Arrange the ions from largest to smallest.
Se^2-, Sr^2+, As^3-, Br^-, Rb^+
Answer:
As^3-, Se^2-, Br^-, Rb^+, Sr^2+
Explanation:
The state of matter in which a material has a definite shape and a definite volume is the _____ state.
liquid
elemental
solid
gas
Answer:
solid
Explanation:
in the solid state the material will has a fixed shape and volume whatever the container that contains it
where in liquid the shape will be different depending on the container
and in gas state the shape and volume are not definite
A 28.98 g piece of gold is put in a 10-mL graduated cylinder, and the water rises 1.50mL.
a. What is the density of gold?
b. You know the density of silver is 10.5 g/mL. What mass of silver would cause the water to rise 1.50mL?
Answer:
a. 19.32 g/mL
b. 15.75 heres the answers
MULTIPLE CHOICE QUESTION
If there are 5280ft in 1 mile, 12 inches in ift, and
2.54 cm in 1 inch, what is 2.3 miles in cm?
0.0011 cm
370,149.12 cm
370,149.12 centimeters
'Wetness' is actually a description of water's stickiness. This stickiness
comes from two properties:
and
A. high specific heat capacity and density
OB. None of these
C. ability to be a universal solvent and high latent heat of fusion
D. adhesion and cohesion
Reset Selection
Answer:
D. adhesion and cohesion
Which of these can be mined from earth and used as an energy source?
A.Get rid of the waste and extra fluid
B.Ureters
C.Coal
D.Bladder
coal
Which of these can be mined from earth and used as an energy source?
A.Get rid of the waste and extra fluid
B.Ureters
C.Coal
D.Bladder
ans is coal
Please help me please find the answer
I have already answered this question once. Anyways please let me know whether it is useful or not
What is the mole ratio of NH3 to N2?
answers : the mole ratio between NH3 : NH2 is 2:1
Someone help answer this
it is water energy :) this is easy
Answer: Heat
Explanation:
Also considered as thermal energy. So when the person dives in water their heat temperature balances out.
What structural feature of the vanilloid compounds is responsible for their very different flavors?
The structural feature responsible for the different flavors of vanilloids is the presence of the vanillyl function group such that they are able to bind with transient receptor type 1 (TRPV1) channels and act as an agonist
Reason:
Vanilloid compounds include acetovanilon, capsaicin, vanillylmandelic acid,
homovanillic acid. The vanillyl group is functional group of the vanilloids.
The flavor of spicy peppers such as the sensation of burning is due to
binding to the transient receptor type 1 (TRPV1) receptor which is an a
channel that give a response to acid, and high temperature stimuli, by
vanilloid compound such as capsaicin, ovanil, and resiniferatoxin
The agonists of TRPV1 such as resiniferatoxin and capsaicin have the
vanilloid ring. Capsaicin has a long highly lipophilic, aliphatic chain such
that it binds in the intracellular locations to TM3 and TM4 of the TRPV1
channel TM3 and TM4
Therefore, the special feature of the vanilloid compounds that is
responsible for their different flavors, is the presence of the functional the
vanilloid ring and the ability to bind with to the TRPV1 acting as an agonist
Learn more about TRPV1 here:
https://brainly.com/question/17925464
EASY QUESTIONS Need answers for both questions
Answer: I can’t really see the question sorry it’s to blurry
aplicando a lei das proporcoes definidas,calcule a massa do elemento sodio existente em 10 g de sulfato de sodio
Answer:
3.24
Explanation:
em primeiro lugar, você calcula o peso molecular de cada elemento e o multiplica pelo seu número, portanto, se for Na2So4, então multiplicaremos o peso molecular do sódio, que é 23, por 2 e assim por diante. então você terá as proporções de sódio para enxofre para o total, que será de 142. então por multiplicação cruzada definirá o total para 10 e, em seguida, multiplique-o por Na que foi de 46, em seguida, divida-o pelo total que é 142 e então dá a você o sódio em 10 gramas de Na2SO4, que é 3,24.
Potassium is a(n)____ metal than zinc
A more active
B less active
C equally active
D heavier
Answer:
Potassium is a more reactive metal than zinc
PLEASE MARK ME BRAINLIESTPotassium and zinc both are chemical elements, where Potassium is a more active metal than zinc. The correct option is A
What are potassium and zinc?
Potassium and zinc both are chemical elements. Potassium is metal and its symbol is K and its atomic number is 19. Its s silver-colored metal. Zinc is a slightly brittle metal and its symbol is Zn and its atomic number is 30.
Potassium is present in food materials, and it is a soft and necessary micronutrient for the body. Zinc is also a micronutrient that is needed in a small amount for the body.
Potassium is an alkali metal and zinc is a transition metal and is present in the center of the periodic table. Alkali metals (potassium) are more reactive than transition metals.
Thus, the correct option is A more active.
To learn more about potassium and zinc, refer to the link:
https://brainly.com/question/2559084
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Molecules, which have the same chemical formula and bond connectivity but different relative arrangement in three- dimensional space is called
(a) Enantiomers
(b) Stereoisomers
(c) Diastereomers
(d) Constitutional isomers
Answer:
B
Explanation:
Stereoisomers have the same connectivity in their atoms but a different arrangement in three-dimensional space. There are different classifications of stereoisomers depending on how the arrangements differ from one another. Notice that in the structural isomers, there was some difference in the connection of atoms. For example, 1-butene has a double bond followed by two single bonds while 2-butene has a single bond, then a double bond, then a single bond. A stereoisomer will have the same connectivity among all atoms in the molecule.
Miranda gets a small cut on her thumb after she breaks a beaker, and she begins to look around for the lab first aid kit.
What important first step should she have taken?
She should have first called 911.
She should have first informed her whole class.
She should have first called a doctor or a nurse.
She should have first notified the teacher.
Answer:
She should have first notified the teacher.
Answer:
D. She should have first notified the teacher.
what is the chemical equation of combustion of coconut oil
Answer:
2 C6H14 + 19 O2 -> 12 CO2 + 14 H2O.
Explanation:
'.'
Why would an atom emit particles or waves from its nucleus?
A. None of these
B. If it has been part of a single replacement reaction.
C. If it has been part of a double replacement reaction.
D. To create a more stable nucleus.
An atom emits particles or waves from its nucleus to create a more stable nucleus. The correct option is D.
What is an atom?An atom is a divisible substance that contains subatomic particles like electrons, protons, and neutrons. The atoms are the smallest unit of matter that made every element. The atom also contains a nucleus, the electrons revolve around the nucleus.
An atom is full of electrons, and when an atom emits energy when an electron changes its level and moves near to the nucleus.
An atom emits a wave or particle to become more stable than before because it lowers its energy. More energy leads to the instability of the atom.
Thus, the correct option is D. To create a more stable nucleus.
Learn more about the atom, here:
https://brainly.com/question/12244434
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If the sum of the last
number and the middle
number of three consecutive
integersis is 71, then the
Least (smallest) number
mumber must be
Answer:
number must be 0000.999
