Answer:
The answer is 13.87 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density of metal = 5.78 g/mL
volume = final volume of water - initial volume of water
volume = 24.7 - 22.3 = 2.4 mL
We have
mass = 5.78 × 2.4 = 13.872
We have the final answer as
13.87 gHope this helps you
Which question is scientifically testable, allowing a conclusion to be made based on scientific evidence? A) Are cats better than dogs? B) Are cats happy when they climb trees? C) Are dogs happy when they go on a walk? D) Are cats more active at night than during the day? dont mind the subject its supposed to be science
Answer:
c or b
Explanation:
it is not d because my cats sleep all night
it is not a because i like cats but my friend loves dogs
Answer:
Answer is C
Explanation:
are cats more active at night than the day?
A little boy places an ice cube in his hot bowl of stew and then walks out of the room. When he returns, the ice cube is gone.
Based on the law of conservation of mass, what happened to the ice cube in the scenario?
a. The extreme temperature difference between the stew and the ice cube caused the ice cube's mass to be converted into energy.
b. The extreme temperature difference between the stew and the ice cube caused the stew's mass to destroy the ice cube's mass.
c. The extreme temperature difference between the stew and the ice cube caused the ice cube to change state while its mass remains the same or constant.
d. The extreme temperature difference between the stew and the ice cube caused the ice cube's mass to shrink to a barely noticeable amount.
Answer:
It's actually C
Explanation:
The Ice's mass was never destroyed, just converted therefore it would be C, which states the mass never disappeared, just changed to water.
Help with science pleaseee
Answer:
thermal energy
Explanation:
the sun used thermal energy to melt the icecream
help please i would really appreciate it thanks
A cart weighing 13kg is pushed by a vendor. If the cart accelerates at 3.5 m/s2
, how much
is the external force exerted by the vendor?
Answer:
If the cart accelerates at 3.5m/s2, what is the net external force exerted by the vendor? Given: Solution: m= 13kg F=ma a= 3.5m/s2 =13kg x 3.5m/s2 Find: =45.5kg*m/s2 or 45.5 N Fnet The net force exerted by the vendor was 45.5N. 4. 2.
Explanation:
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Why are fresh vegetables sprinkled with water at the grocery store (you should use what you learned to infer the answer to this)? Use the following terms: osmosis, diffusion, passive transport, cell membrane and equilibrium in your answer.
Answer:
They do this so that water will diffuse into the vegetables and keep them plump and allow them to keep their look of freshness. 7. Roads are sometimes salted to melt ice.
Explanation:
Help PLEASE HELP PLEASE
Answer:
b. k+
Explanation:
What is a term for the forces that two objects exert on each other?
Answer:
action-reaction force.
Explanation:
the pair of opposite but equal forces that two objects exert on each other. weight. the gravitational force exerted by a large body, usually Earth, on an object.
Answer:
exerted forces
Explanation:When an object has several forces acting on it, the effects of force is same as one force acting on the object in a certain direction and this overall force is called the ‘resultant force’.
The molecular mass of CO2 is 44.01 u. What is the mass of 2.0 mol of CO2?
Answer:
The mass of 2.0 mol of C02 is 44 grams
Explanation:
The weight of CO2 is 44 grams per mole (1 x 12 grams/mole for the carbon and 2 x 16 grams/mole for the oxygen atoms)
According to the mole concept, the mass of 2.0 mole of carbon dioxide is 88.02 u.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons.Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Mass can be calculated by the number of moles formula as,
mass=number of moles×molar mass
=2×44.01=88.02 u.
Thus, the mass of 2.0 mole of carbon dioxide is 88.02 u.
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Count the atoms of each element.
5(NH) P
5
10
15
20
30
40
50
60
70
Nitrogen
o
o
O
O
O
O
o
Hydrogen
O
O
O
O
Phosphorus
O
O
O
O
O
Answer:
Nitrogen = 15
Hydrogen = 60
Phosphorus = 5
Answer: uh
Explanation:
How much does a football weigh?
Answer:
16 oz
Explanation:
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When ammonium chloride is dissolved in water, the beaker gets cold. Which type of reaction does this describe
O exothermic
O endothermic
O both exothermic and endothermic
O neither exothermic nor endothermic
Answer:
B
Explanation:
i think with exothermic reactions heat is released
this is what i looked up
hope this helps i took chem last year and think this is what i learned
Considering the definition of exothermic and endothermic reactions, the correct answer is second option: the reaction is endothermic.
Energy and chemical reactionsEnergy is the ability to do work or to produce heat.
Remembering that chemical reactions involve a reorganization of atoms between substances with breaking or formation of chemical bonds, this formation or breaking of chemical bonds is accompanied by changes in the energy of the system.
Exothermic reactionsChemical reactions that release heat are called exothermic. That is, an exothermic reaction is one where energy flows out of the system.
So, at room temperature, the heat released by a chemical reaction is enough to cause a rise in temperature.
Endothermic reactionsAn endothermic reaction is one that requires heat to take place. In other words, a chemical reaction is endothermic when it absorbs energy from the environment.
In this case, the heat is transferred from the outside to the inside of the system. By absorbing heat, the effect of an endothermic reaction is to lower the temperature.
This caseWhen ammonium chloride is dissolved in water, the beaker gets cold. That means the system is absorbing heat from the surrounding and the temperature does down.
So, the correct answer is second option: the reaction is endothermic.
Learn more about endothermic and exothermic reactions:
https://brainly.com/question/4345448?referrer=searchResultshttps://brainly.com/question/11753370?referrer=searchResultshttps://brainly.com/question/18523044?referrer=searchResultshttps://brainly.com/question/9799465?referrer=searchResultshttps://brainly.com/question/4364765?referrer=searchResultsWho performed the oil-drop experiment?
O A. Albert Einstein
B. Robert Millikan
O C. J. J. Thomson
D. Niels Bohr
Answer: Robert Millikan
Explanation: Robert Millikan was the first person to perform the oil drop experiment. It was done many centuries ago. Hope this helps you!
Lead has a density of 11.4 g/cm^3. What is the density in kilograms per cubic meter?
The density in kg/m³ = 1.14 x 10⁴
Further explanationDensity is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of density
The unit of density can be expressed in g/cm³ or kg/m³
Density formula:
[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]
ρ = density , g/cm³ or kg/m³
m = mass , g or kg
v = volume , cm³ or m³
A density of Lead : ρ = 11.4 g/cm³
the density in kg/m³ :
[tex]\tt 11.4~\dfrac{g}{cm^3}\times \dfrac{kg}{10^3~g}\times \dfrac{cm^3}{10^{-6}~m^3}=\boxed{\bold{1.14\times 10^4~\dfrac{kg}{m^3}}}[/tex]
a) Why is mole called fundamental
un
b) State the law of moment.
Explanation:
The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12. The mole is defined in terms of the physical properties of a real object, the carbon atom. Therefore it is a base unit. ...
which substance is more soluble sugar or flour why does sugar is soluble??
Answer:
sugar
Explanation:
because sugar dissolves
in water, while flower because it is insoluble
A lab worker receives an average radiation
dose of 21 mrem each month. Her allowed dose is
5,000 mrem/y. On average, what fraction of her
yearly dose does she receive?
Answer:
0.0504
Explanation:
The study of chemicals is called chemistry. The reaction that needs heat to complete the reaction is called an endothermic reaction.
The correct answer to the question is mentioned as follows:-
What is radiation?Radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.After solving the question, the correct answer is 0.504 on average of the year.
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12. t is the technique of revolutioary repackaged application thal enhances
the detail of an image on fabric using resistant dyeing
A Canling
B. Waxing
C. Moderm Baik
D. Traditional
Batik
What subatomic particles are found in the nucleus and in the electron cloud
Answer:
Electrons
Explanation:
Explain why the name 1-propene is incorrect.what is the proper name for this molecule
Answer:
Explanation:
Explain why the name 1-propene is incorrect what is the proper name for this molecule
The name 1-propene is incorrect because;
It is not necessary to indicate the position of the double bond. Whichever way you decide to flip it, the double bond will always be at the first carbon.The proper name for this molecule is;
PropenePropene otherwise known as propylene is simply propane with a double bond at the first carbon.
When we get to the alkenes where the naming of organic compounds becomes more complex, the numbering system is used to indicate the position of the bonds.
With propene, there are three carbon atoms and the double bond will always appear in between two of the carbon atoms.
So, it is not important to use numbers to show that the carbon is at the first carbon. This becomes necessary from the next compound, butene, where there are more carbons.
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What is the exponent when you convert 0.000978 into scientific notation
A. 4
b. -4
c. 3
d. -6
.. HELPPPPP
Answer:
B: -4
Explanation:
0.000978
0.00978(x10)
0.0978(x10x10)
0.978(x10x10x10)
9.78(x10x10x10x10)
9.78 X (10^4)
9.78X10^-4
because you move the decimal to the left it becomes negative 4
Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10 If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.
What converts electric energy to radiant energy and thermal energy?
Answer:
Many things, but i think a toaster...
Explanation:
Write down the molecular formula of sodium silicate?
Answer:
Na₂SiO₃
Explanation:
Using the image above, match A-G to their appropriate part of the periodic table. (If the image does not show, click on the link above for an alternative way to access the image.)
Question 5 options:
Metals
Period
Group/Family
Noble gases
Halogens
Metalloids
Nonmetals
1.
A
2.
B
3.
C
4.
D
5.
E
6.
F
7.
G
1. A ➡️ Metals
2. B ➡️ Metalloids
3. C ➡️ Non-metals
4. D- Column ➡️ Group/Family
5. E- Row ➡️ Period
6. F ➡️ Halogens
7. G ➡️ Noble gases
Explanation:
The Periodic Table is known to be an array of chemical elements that are organized in order of their increasing atomic number. That arrangement gives a recurring pattern known as the periodic law in their properties.
Periods are found in the horizontal rows (across) the periodic table, while groups are found in the vertical columns (down) the table.
The Periodic Table was discovered by D.I Mendeleev.
Pls help me solve this and I will mark you the Brainiest
Answer:
b
Explanation:
plz mark brailest
(1) In an experiment for determining the density of water, the following results
were recorded.
-mass of an empty beaker = 65gm.
- mass of the beaker and water = 165gm.
the volume of water = 100Cm.
(Calculate the density of water)
Given parameters:
mass of an empty beaker = 65gm
mass of the beaker and water = 165gm
volume of water = 100cm³
Unknown:
Density of water = ?
Solution:
Density is the mass per unit volume of a substance;
Density = [tex]\frac{mass}{volume}[/tex]
To find the mass of the water ;
Mass of water = Mass of beaker and water - mass of an empty beaker
= 165g - 65g
= 100g
So input parameters and solve;
Density = [tex]\frac{100g}{100cm^{3} }[/tex]
Density of the water in the beaker = 1g/cm³
Not all atoms of the same element have the same mass. These atoms are called isotopes.
Which statement is true concerning oxygen-16 and oxygen-18, two common isotopes of
oxygen found in the air?
A.They have different numbers of electrons.
B.Oxygen-18 has two more protons than oxygen-16.
C.They have the same mass number.
D.They behave the same way in chemical reactions.
Answer:
C
Explanation:
4.They are different states of the same pure substance
What are the similarities and differences between the two fish varieties?
Answer-
Fish are obviously animals because they move, they have sensory organs (eyes, mouth, barbels), and they have body structure (skeletons, skin, etc.). They breathe oxygen. They eat other organisms to survive. Fish are different from other animals because they live in water.
Answer:
The surface fish live near the surface of the water, and the blind cave fish live in dark subterranean caves. The surface fish have eyes and pigmentation on their bodies. The blind cave fish don’t have eyes, and they’re often albinos.
1. How many protons?
2. What is the atomic number?
3. What element is this?
4. How many neutrons?
5. What is the mass number?
6. What is the isotope?
Answer:
1) 5 protons, 2) 5, 3) boron, 4) 6 Neutrons, 5) 10.811 ≈ 11, 6) Boron-9
To which family on the Periodic Table does this Bohr Model belong?
Answer: Hydrogen
Explanation: The Bohr Atom is a very simplified model of the electron positions of each element of the Periodic Table. Each Row of the periodic table is represented by an orbit. Hydrogen and Helium are in the first energy level (row) of the periodic table and their Bohr Models would have one orbit.
Hope this helps! :)