Answer:
50662.5
Explanation:
An element whose particles are atoms
Answer:
a chemical element
Explanation:
A chemical element is a substance that contains only one type of atom
Which graph above shows an object’s acceleration?
a or b
Why did you choose that graph in question above (explain why)
Answer:
A i just did it. And yes i do go to k12
Explanation:
Which is an example of kinetic friction?
friction between a car’s windshield and the air as you drive into the wind
friction between a sticky note and the page of a book as it marks your place
friction between your shoes and the ground when you stand still
friction between your skin and a pencil as it rests in your palm
Answer: friction between a car's windshield and the air as you drive into the wind.
Explanation: Hope this helps :)
What are 3 similarities between physical changes and chemical changes
Answer:
Heat change is involved in both process.
II. Both result in change of state of matter
Explanation:
Physical change substance involves the alteration of physical state of a substance. Chemical change substance involves the alteration of the chemical composition of the substance
A chip is burned beneath an aluminum container holding 28.7 g of water causing the temperature of the water to increase from 11.3 °C to 33.2 °C. How many joules of heat were absorbed by the water? Water’s specific heat is 4.18 J/gºC
Answer:
Q = 2627.25 J
Explanation:
Given that,
The mass of water, m = 28.7 g
The temperature of the water to increase from 11.3 °C to 33.2 °C
The specific heat of water is 4.18 J/gºC
The heat absorbed by the water is given by :
[tex]Q=mc\Delta T\\\\Q=28.7 \times 4.18 \times (33.2-11.3)\\\\Q=2627.25\ J[/tex]
So, 2627.25 J of heat is absorbed by the water.
anybody know the answer to this ???
Answer:
Answer is C.
Explanation:
I hope it's helpful!
What two terms are used to describe the temperature at which solids and liquids of the same substance exist at the same time?
Answer:
The answer is melting and freezing point.
Explanation:
LEVEL 2
Solve each problem and write
the matching letter on the
blank above the answer
S Iron (1) oxide
Lead (IV) oxide
I
Load (1) Oxide
U Iron (1) Oxide
H Iron (III) hydroxide
T
Iron (IV) oxide
R Iron (II) Oxide
G Lead (1) Oxide
O
Lead (II) hydroxide
N
Iron (1) hydroxide
A Lead (111) hydroxide
Pbo
Feo,
Fe(OH), Pb(OH), FOOH
Pb,
Fo,o
Pb(OH),
Foo
Pb(OH), Foo
FeOH
Pbо,
Answer:
PbO = lead oxide G
FeO2 Iron (iv) oxide T
Fe(OH)3 iron(iii) hydroxide H
Pb(OH)3 lead(iii) hydroxide A
FeOH iron(i) hydroxide N
Fe2O3 iron (iii) oxide S
Pb(OH)3 lead(iii) hydroxide A
FeO iron(ii) oxide R
Pb(OH)2 lead(ii) hydroxide O
Fe2O iron (i) oxide U
FeOH iron (i) hydroxide N
PbO2 lead(iv) oxide D
Explanation:
How many moles is 0.025 g of NaCO3? (Show Your Work)
mol of Na2CO3 = 2.36 x 10⁻⁴
Further explanationGiven
Mass : 0.025 g of Na2CO3
Required
moles
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass :
mol = mass : molar mass
mass = mol x molar mass
Input the value :
mol = mass : MW Na2CO3
mol = 0.025 g : 106 g/mol
mol = 2.36 x 10⁻⁴
For the balanced equation shown below, if the reaction theoretically
should produce 7.99g CaO but experimentally produces 6.81 grams of
CaO, what is the percent yield?
CaCO3---->CaO+CO2
85.23%
0 14.77%
54.41%
O 117.33%
Answer:
Percent yield = 85.23%
Explanation:
Given data:
Theoretical yield = 7.99 g
Actual yield = 6.81 g
Percent yield of CaO = ?
Solution:
Formula:
Percent yield = ( actual yield / theoretical yield ) × 100
by putting values,
Percent yield = (6.81 g/ 7.99 g) × 100
Percent yield = 0.8523× 100
Percent yield = 85.23%
PLs help mweee Ill mark brainliest
the 3rd one is the answer
Which statements accurately describe volume? Check all that apply. Volume is a physical property of an object. Volume is measured using a balance. The volume of a solid changes with the shape of the container. One unit of volume is the milliliter. Liquids and solids have constant volumes
Answer:
Liquids and solids have constant volumes
Explanation:
I believe this is the most correct statement
Answer:
Volume is a physical property of an object.
One unit of volume is the milliliter.
Liquids and solids have constant volumes.
Hope this helps <3
Explanation:
I need help with this one question
Answer:
colder
Explanation:
In your own words, define the word "potential"
Answer:
1 : the chance or possibility that something will develop and become real There is a potential for injury. 2 : an ability or quality that can lead to success or excellence : promise She has great potential as a musician.
Explanation:
Answer:
potential: possessing or demonstrating the ability to evolve into or become something in the future.
OAmalOHopeO
Chemical properties describe matter based on its ability to change into___
A. A new substance
B. The same thing
C. Water
D. A powder
Answer:
A. A new substance
Explanation:
sorry if its wrong if its right your welcome <3
If you have 40.0 g HCl and 40.0 g NaHCO3, do you have the same number of moles of each?
They both have a different number of moles
Further explanationGiven
40 g HCl
40 g NaHCO3
Required
moles
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
n = mass : molar mass
So the moles of a compound are affected by its molar mass (inversely proportional)
The larger the molar mass (of the same mass), the smaller the moles
molar mass HCl = 58.5 g/mol
molar mass NaHCO3 = 84 g/mol
mol HCl :
= 40 : 58.5
= 0.684
mol NaHCO# :
= 40 : 84
= 0.476
In the following chemical equation, which are the reactants?
2HF + Mgo MgF2 + 2H20
>
A. 2HF + MgF2
B. 2H+ + Mgo
C. MgF2 + H20
D. MgO + H20
A
B
D
Which best explains why fungi are often called natural recyclers?
They provide a continuous food resource for many other organisms.
They break down rotting materials and return nutrients to the soil.
They take in large amounts of carbon dioxide, helping to clean the air.
O They are found in nature and have many different practical uses,
They break down rotting materials and return nutrients to the soil.
( They don't do photosynthesis since they are much different from plants)
Answer:
B
Explanation:
which of these elements has the highest electronegativity
A) lithium
B) nitrogen
C) potassium
D) arsenic
E) beryllium
what would a bond between potassium and chlorine be
Answer:Potassium react with elemental chlorine, an electron transfers from a potassium atom to a chlorine atom, forming potassium ion and chloride ion. ... As the bond formation between ions, the bond will be ionic. This is because, this process of transfer of electrons from one atom (K) to another atom (Cl).
Explanation:
In a modern periodic table the element are arranged in order of increasing
Answer:
what are you asking?
Explanation:
how many vitamin c tablets is 250mg? (i’ll give brainliest)
how much energy was added to the ice between point a and point d?
Answer: 26kj
Explanation:
Just took the test and got it right :D
True or false: Oceans have no effect on the temperature on Earth’s land???
Answer:
false
Explanation:
What is salinity? (giving you 30 points if you answer it and I give brainlist)
Question 1 options:
a liquid mixture in which the smaller component (solute) is distributed evenly through the major component (solvent)
The concentration of dissolved salt in a liquid
to become incorporated with a liquid in forming a solution
the total amount of salt dissolved in the sea
Answer:
D
Explanation:
Salinity is the saltiness or amount of salt dissolved in a body of water
Answer:
its b trust me i got it right
Explanation:
How many molecules are there in 5.9 moles of NaCl?
The number of molecules= 3.55 x 10²⁴
Further explanationGiven
5.9 moles of NaCl
Required
The number of molecules
Solution
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
So for 5.9 moles :
= 5.9 x 6.02 x 10²³
= 3.55 x 10²⁴
If you need 2.5 moles of Rb2Cr7, how many grams do you need?
Answer:
0
Explanation:
BRAINLIST!!!
Water moving along the water cycle also moves through the Earth's environment in the form of rain, ice, snow, and surface water. This water has helped to shape the Earth's surface by which of the following processes?'
radioactive decay
chemical weathering
dissolving
physical weathering
oxidation
Answer:
I believe it is chemical weathering, physical weathering, oxidation, and dissolving...
Explanation:
How many chemical changes can something go through
Answer:
Only one
Explanation:
What is the lowest energy level that contains d orbitals?
O A. 4
O B. 3
O C. 2
D. 1
Answer:
I believe it 3