Answer:
The answer is
7.80Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass of metal = 156 g
Since 1 mL = 1 cm³
20 mL = 20 cm³
volume = 20 cm³
It's density is
[tex]density = \frac{156}{20} = \frac{39}{5} \\ [/tex]
We have the final answer as
7.80 g/cm³ to 3 significant figuresHope this helps you
Answer:
7.8g/cm³
Explanation:
Formula is [ d = m/v ] where m = mass and v = volume.
We are given both "m" and "v" so we can solve for the density.
d = 156/20
d = 7.8
Best of Luck!
how objects with different masses and volumes have the same density?
Answer:
mass and volume are independent. Two objects with the same volume can have different masses hence they can have different densities
Explanation:
The mass of atoms their size and how they are arranged determine the density
Is Salt and pepper an example of a homogenous mixture?
Answer:
no it is a heterogeneous mixture because salt and pepper are not mixed uniformly.
Which ion was formed by providing the second ionization energy to remove an electron?
Ca2+
N3–
Fe3+
S2–
Answer:
Ca2+
Explanation:
I took the test lol
Answer:
Ca2+
Explanation:
i just did the test
if 125g of KClO3 is heated, what is the total mass of the products?
Given parameters:
Mass of KClO₃ = 125g
Unknown:
Total mass of the products = ?
When KClO₃ is heated, it thermally decomposes to KCl and O₂ according to the chemical equation below;
2KClO₃ → 2KCl + 3O₂
All chemical equations obeys the law of conservation of matter and with this regard, we know that the amount of reactants used is the same as that of the product.
The total mass of the products must give us 125g according to this law of conservation of matter.
Now to find the masses of each product,
Find the number of moles of the given reactant:Number of moles = [tex]\frac{mass}{molar mass}[/tex]
molar mass of KClO₃ = 39 + 35.5 + 3(16) = 122.5g/mol
So number of moles of KClO₃ = [tex]\frac{125}{122.5}[/tex] = 1.02moles
2. Now, using this number of moles, find the number of moles of the products using this value;
2 moles of KClO₃ produced 2 moles of KCl
1.02 moles of KClO₃ will also produce 1.02moles of KCl
2 moles of KClO₃ produced 3 moles of O₂
1.02 moles of KClO₃ will produce [tex]\frac{1.02 x 3} {2}[/tex] mole = 1.53 moles of O₂
3. Now find the masses of each product;
Mass = number of moles x molar mass
molar mass of KCl = 39 + 35.5 = 74.5g/mol
molar mass of O₂ = 16 x 2 = 32g/mol
Mass of KCl = 74.5 x 1.02 = 75.99g
Mass of O₂ = 32 x 1.53 = 48.96g
Total mass of products = mass of KCl + Mass of O₂ = 75.99g + 48.96g
= 124.95g
This value is approximately the same as that of mass of KClO₃
A piece of aluminum has a volume of 12 cm3and a mass of 32 g. What is its density? Do not forget the units.
Answer:
The answer is 2.67 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of metal = 32 g
volume = 12 cm³
The density is
[tex]density = \frac{32}{12} = \frac{8}{3} \\ = 2.6666666...[/tex]
We have the final answer as
2.67 g/cm³Hope this helps you
Answer:
2.67g/cm or 2.67g/cc
Explanation:
arsenic does not have any valence electrons in the 3D orbital because
Answer:
3d orbital is completely filled.
Explanation:
Which mineral is commonly found in igneous rocks?
halite
feldspar
gypsum
talc
Answer:
Feldspars
Explanation:
Hope this helps! :) x
What is the median of the following set: 2, 4, 6, 8, and 10?
Answer:9
Explanation:
(3+8+10+15)/4 = 36/4 = 9
Chemical engineers who specialize in negotiating for large purchases and instructing customers in use of the products are:
corporate managers
legal services
product developers
marketing personnel
Answer:
d
Explanation:
What is the definition of a Lewis acid?
a substance that accepts electrons to form a covalent bond
a substance that donates electrons to form a covalent bond
a substance that accepts a proton
a substance that donates a proton
Lewis acid is:
A. a substance that accepts electrons to form a covalent bond
What is a Lewis acid?A Lewis acid is accordingly any substance, for example, the H+ particle, that can acknowledge a couple of nonbonding electrons. At the end of the day, a Lewis acid is an electron-pair acceptor.
Thus, option A is correct.
Find more information about Lewis acid here:
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Answer:
A: a substance that accepts electrons to form a covalent bond.
Explanation:
what is a protons mass
Answer:Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge
Explanation:
A proton has a mass of about 1 amu
four large grocery food chains sell approximately how much of the nations food
100 percent one-half one-fourth three-fourths.
(got it off google sorry if it is wrong)
What is the equation for density?
m
O DE
V
O D= V
m
m
O D =
DE
= 1 mu
D =
mass divided by volume
Answer: This may not work for you
Explanation: Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
What did Dalton determine about the relationship between atoms, elements, and compounds?
Answer: got on xbox
Explanation:
Your cross country skis are 210 cm long. What is their length in inches?
210 cm converted into inches is 82.67716535 in.
What is an element?
a component or constituent of a whole or one of the parts into which a whole may be resolved by bricks and mortar are elements of every masonry wall.
Answer:
An essential part of something abstract.
A group 5A element:
actinium
arsenic
rhenium
Answer:
ARESENIC is in the 5A category
Explanation:
edge 2020
5A (Nitrogen group) elements tend to react to gain 3 electrons to be like noble gas.
What is 5A group element?5A group known as nitrogen group. In these group elements contains nonmetals, metals, halogens, noble gases and metalloids.
These elements react with oxygen to form acidic compounds.
Configuration of 5A group: 2s2 2p3, 3s2, 3p2
Example: nitrogen, phosphorus, arsenic etc.
Actinium (Ac) atomic number = 89 (it is a silvery radioactive metallic material. Actinium-227 is extremely radioactive element).
Arsenic (Ar) atomic number = 33 (it found in many minerals usually in combination of sulfur and metals but it also found in pure elemental crystal. It is a metalloid).
Rhenium (Re) atomic number = 75 (it is found in earth crust. It is used in additive to tungsten and molybdenum-based alloys. It is very toxic to humans it may causes skin related disease).
Therefore, 5A (Nitrogen group) elements tend to react to gain 3 electrons to be like a noble gas.
Learn more about 5A group element, here:
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17. Is the scientific method suitable for solving problems only in
the sciences? Explain.
Answer:
Hey mate
Explanation:
Yes these methods are only used in biology, chemistry, physics, geology and physcology.... They can't be used in maths or other subject, as it is said SCIENCE IS SCIENCE!
Hope it helps you,
mark me the brainliest,
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What do mass and weight have in common?
Answer:
Mass is a measure of how much matter an object contains, while weight is a measure of the force of gravity on the object. An object has the same composition, and therefore mass, regardless of its location.
Explanation:
What is the process called that living things perform to make useable energy from
sugar?
-photosynthesis
-exercise
-heterotrophs
-cellular Respiration
Answer:
cellular respiration
Explanation:
Organisms ingest large molecules, like carbohydrates, proteins, and fats, and convert them into smaller molecules like carbon dioxide and water. This process is called cellular respiration, a form of catabolism, and makes energy available for the cell to use.
Which of the following is FALSE about the atomic models and subatomic particles?
Which of the following is FALSE about the atomic models and subatomic particles?
a
J. J. Thompson discovered the electrons using the Cathode Ray Tube and proposed electrons were randomly scattered inside the atom.
b
John Dalton's model of the atom was a solid that was divisible into subatomic particles
c
In Schrodinger and Heisenberg's combined model of the atom, electrons were both particles and waves at the same time.
d
Rutherford's model was the first to include a positively charged nucleus at the center of the atom.
Answer:
all i know is that its not D ... good luck luv lol
Explanation:
How many hours are in 7 months? (assume 30 days in a month)
Answer:
there is about 5110.01 hours in 7 months
Explanation:
because no 7 months in a row have the same amount of months so about 730.001428571 days in 7 months times the number of months. Hope this helps!
Answer: 730.08 hours x 7= will get you your answer
Explanation: Because, the average month is 30.42 days. A day is 24 hours, so the average month is 730.08 hours ( 30.42 days * 24 hours ). Just do the math above and that should be your answer.
Hydrogen has an average atomic mass of 1.008 amu and has 3 known isotopes
(Hydrogen-1. Hydrogen-2, and Hydrogen-3), which isotope is the most abundant? Justi
Answer:
Hydrogen-1
Protium is the most abundant isotope of hydrogen.The abundances of protium, deuterium and tritium are 99.984%,0.016% and 10 to the power –15 respectively.
How is raw steel made and how is it different from raw iron?
(02.07 MC
As you move down group one of the periodic table, what happens to the atomic radil? (4 points)
Answer:
It increases
Explanation:
The atomic radii increases because you are adding more shells/electrons
How many moles of gold (Au) are there in 3.01 X 10^23 atoms of gold (Au)?
Wat is atomic in science
hay una cosa llamada google usarlo dummby!
What is an open system?
O
A. A system that allows energy and mass to move in and out of it
B. A system that allows mass to move in and out but not energy
O
C. A system that does not allow energy or mass to move in or out of
it
O D. A system that allows energy to move in and out but not mass
Answer:
A system that allows energy and mass to move in and out of it.
APEX
A. A system that allows energy and mass to move in and out of it.
The correct definition of an open system is option A.
A system that permits both energy and matter (mass) to enter and exit is referred to as an open system. An open system is one in which energy and matter are exchanged with the environment, allowing the system to interact with and be affected by outside forces.
In opposition:
B. While energy cannot travel in or out of a closed system, mass can. Only energy, not matter, may be exchanged with the environment in a closed system.
C. An isolated system prevents the entry or exit of energy or mass. It does not interchange any energy or material with its surroundings because it is entirely self-contained.
D. It is uncommon to classify a system that permits energy to enter and exit but not mass. It defies the idea of an open system, where both energy and matter can enter and exit, and it does not reflect any particular kind of system.
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Which of the following is the correct measurement for the volume of liquid shown below?
A 50.1 mL
B 51 mL
C 50.2 mL
D 52.0 mL
PLEASE HELP!!!!!!!
WILL GIVE BRAINLIEST!!!!!
Describe a volcanic eruption.
Answer:
A volcanic eruption occurs when molten rock, ash and steam pour through a vent in the earth's crust. Volcanoes are described as active (in eruption), dormant (not erupting at the present time), or extinct (having ceased eruption; no longer active).
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