Answer:
119.87 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question we have
[tex]volume = \frac{935}{7.8} \\ = 119.871794...[/tex]
We have the final answer as
119.87 cm³ to two decimal placesHope this helps you
The second atomic structure YES
No
Answer
The second part of the theory says all atoms of a given element are identical in mass and properties. The third part says compounds are combinations of two or more different types of atoms. The fourth part of the theory states that a chemical reaction is a rearrangement of atoms.
Explanation:
How to do this question plz answer me
Answer: Ionic
Explanation: It is a type of chemical bond that generates two oppositely charged ions.
can somebody help with this please ?
Answer:
B. Molecules of different types of atoms that are not attracted to each other.
Explanation:
On a broad basis, matter can be subdivided into pure or distinct substances and impure substances (mixtures);
Pure substances are distinct substances having the following properties:
All parts are the same throughout Composition is definite They cannot easily be separated or broken down into simpler substances by physical means. Separation by physical methods is not easy. They have a unique set of physical properties.From this criteria, we see that the second choice is nullified. This is because pure substances have their molecules attracted to each other.
I SWEAR THIS IS WAY TOO EASY, WHY AM I THAT STUPID, HELP ME AND ILL MARK U BRAINLIEST
Answer:
i think the first one is gravity and second one is rotation
Explanation:
1. Hermione is trying to replicate the Polyjuice Potion that they created in their second year at Hogwarts. The problem is that she doesn’t have the exact ingredients that she needsandshe is trying to substitute imitation bat wings instead of real bat wings. She knows that they are not as strong as the original so she is making three batches in the same cauldrons over the same fire so she can test which amount of imitation bat wing will work. The potion will turn green when the correct amount is added.
Test (independent) Variable: ___________________________________
Result (dependent) Variable: _______________________________________________
Constants: ____________________________________________
Answer:
A) Test(independent) variable is bat wings.
B) Result (dependent) Variable is the Polyjuice Potion.
C) Cauldrons and fire
Explanation:
A) A test/independent variable is the variable that is being tested in the experiment or research and it is not affected by other variables in the experiment.
Now, in this experiment, what is being tested is are the bat wings.. Thus;
Test(independent) variable is bat wings.
B) Result (dependent) Variable is a variable that depends on the independent variable being tested. From the question, the result is the Polyjuice Potion.
Thus, Result (dependent) Variable is the Polyjuice Potion.
C) The constants are things that don't change with respect to any of the other variables. In this case, they are; cauldrons and fire
A photon has an energy of 2.34x10-28 J. What is its frequency?
Answer:
f = 3.53×10⁵ s⁻¹
Explanation:
Given data:
Energy of photon = 2.34×10⁻²⁸ J
Frequency = ?
Solution:
h = 6.63 ×10⁻³⁴
Formula:
E = hf
2.34×10⁻²⁸ J = 6.63 ×10⁻³⁴ × f
f = 2.34×10⁻²⁸ J / 6.63 ×10⁻³⁴ Js
f = 0.353×10⁶ s⁻¹
f = 3.53×10⁵ s⁻¹
How many electrons are transferred in total in this
reaction?
2 NH3 + 2 O2 – N2O + 3 H2O
4 electrons
10 electrons
8 electrons
6 electrons
Answer:
10.
....................
.......
Which of these changes is a chemical change?
A. A block of ice forms liquid water when salt is sprinkled on it.
B. A block of ice is crushed into small pieces.
C. A block of ice melts when heated.
D. A block of ice fizzes and forms a gas when sodium is sprinkled on
it.
please help :)
what is the number of moles in 2.43 g Mg
Rain freezes as it hits the ground to form solid water is this a physical change or chemical change?
a. Physical change
b. Chemical change
Can someone help me answer this I will give your brainliest
Answer:
It is Physical Change
Explanation:
Because it is just water turning into another substance of water, nothing chemical is happening.
Is Steel a compound?
Steel is a mixture of iron and carbon fused together with one or more other metals or nonmetals. Because steel is a mixture rather than a chemical compound, steel does not have a set chemical compound formula.
Answer:
No
Explanation:
Steel is a mixture of iron and carbon fused together with one or more other metals or nonmetals. Because steel is a mixture rather than a chemical compound, steel does not have a set chemical compound formula.
Mitochondria are found within: A) All prokaryotic cells B) A cell's plasma membrane C) A cell's nucleus D) Eukaryotic cells E) None of these answers are correct
Answer:
The correct answer is - D) Eukaryotic cells.
Explanation:
The mitochondrion is found in all eukaryotic organisms with the exception of a few. It is a double-membrane-bound organelle within the cytoplasm of the cell that takes in nutrients, breaks them down, and creates energy that makes it the powerhouse of the cell.
It turns the chemical energy from nutrients in the cell to generate energy in a form usable to the host cell which is ATP. Prokaryotic cells lack mitochondria and other double membrane-bound organelles and it s found outside of the nucleus in the eukaryotic cells.
The particles in liquids and gases show random motion. What does that mean and why does it occur??
Answer:
Liquids and gases show random movements because of potential and kinetic energy.
It happens when heat is applied to the particles and they gain more potential and kinetic energy and move around faster. With gases, they have the most energy.
If anything doesnt make sense, make sure to message me
Answer:
The particles show random motion because liquid and gas particles do not have a rigid structure, unlike solid particles. They are free to go anywhere.
Explanation:
Predict: Note the type of reaction you expect for
the sole reactant Na2CO3.
a. single replacement
b. double replacement
c. combustion (and synthesis)
d. synthesis
e. decomposition
Answer:
double replacement
Explanation:
Answer:
It is indeed double replacement
Explanation:
What is the concept of Dimensional Analysis?
Answer:
In engineering and science, dimensional analysis is the analysis of the relationships between different physical quantities by identifying their base quantities (such as length, mass, time, and electric charge) and units of measure (such as miles vs. kilometers, or pounds vs. kilograms) and tracking these dimensions as
Explanation:
I need help! Thanks!
Answer:
C. As speed increases, kinetic energy increase exponentially
Explanation:
As you can see on the graph, the further right we move on the x-axis, the higher the values on the y-axis. This means that as one value increases, the other value also increases. The only answer choice that says this is C.
Hope this helps :)
is C because i did it on the quiz
A bottle has a capacity of 1.2 liters. If the density of ether is 0.74 g/mL, what mass of ether can the bottle hold?
Answer:
Density is a value for mass, such as kg, divided by a value for volume, such as m3. Density is a physical property of a substance that represents the mass of that substance per unit volume. It is a property that can be used to describe a substance. We calculate as follows:
Volume = 60.0 g ( 1 mL / 0.70 g ) = 85.71 mL
Therefore, the correct answer is option B.
Explanation:
888 grams is a mass of ether that the bottle can hold.
Explanation:
The density of the substance is defined as a mass of substance present in the unit volume of the substance.
[tex]Density=\frac{Mass}{Volume}[/tex]
Given:
A bottle with a capacity of 1.2 Liters.
The density of ether = 0.74 g/mL
To find:
The mass of ether hold by a given bottle.
Solution:
The volume of bottle = V = 1.2 L
[tex]1 L = 1000 mL\\V = 1.2 L=1.2\times 1000 mL= 1200 mL[/tex]
The density of the ether = d = 0.74 g/mL
The mass of ether that bottle can hold = m
Volume of ether required = Volume of bottle = V = 1200 mL
Using the formula of density:
[tex]d=\frac{m}{V}\\0.74 g/mL=\frac{m}{1200 mL}\\m=0.74 g/mL\times 1200 mL= 888 g[/tex]
888 grams is a mass of ether that the bottle can hold.
Learn more about density here:
brainly.com/question/952755?referrer=searchResults
brainly.com/question/14373997?referrer=searchResults
i need help on these questions please!!!
the link for the vid will be in the comments
Difference between bouyancy and density
Answer:
what She said but better
Which type of bond involves valence electrons constantly moving between atoms, like a sea of electrons?
a. Ionic
b. Covalent
c. Molecular
d. Metallic
Describe a powerful force?
Answer:
Gravity is a powerful force.
Explanation:
Can be a solid,liquid,or gas A)Metal B)Nonmetal C)Both
Answer:
I think it's B. Nonmetal
(I'm so sorry if it's wrong)
Hope this Helps!
Answer:
I personally think it's both I'm sorry if this is wrong
An astronaut is working outside a spaceship and realizes that the cord attaching him to the
spaceship has been broken. To move back to the spaceship in the vacuum condition, he
throws a heavy tool to the opposite direction from the spaceship. Which law of motion does
he apply?
Does he apply:
A. Newton’s Second Law of Motion
B. Law of Conservation of Energy
C. Newton’s Third Law of Motion
D. Newton’s First Law of Motion
Need helpASAP
Cookware companies have been using a chemical called C-8, which helps to create a nonstick coating to pans. However, the Environmental Protection Agency (EPA) recently claimed that the use of C-8 in the manufacturing of nonstick cookware should be discontinued because studies show it causes cancer.
Who might benefit financially the most from the EPA’s claim?
OwO ^ ^ its A guys knowing cause i took the test
Answer:
C
Explanation:
cookware manufacturers who make pans out of steel only
What do acids react with in limestone to form giant cave systems?
Answer:
Giant cave systems have formed through the reaction of acids with carbonates the that make up limestone. Caves are formed as a result of dissolution of limestone, through a type of chemical weathering known as carbonation.
Explanation:
.
Answer:
It's C: Carbonates
Explanation:
Its on ed
Magnesium (24.30 g) reacts with hydrogen chloride (X g) to produce hydrogen gas (2.04 g) and magnesium chloride (96.90 g). How much hydrogen chloride was used in the reaction?
Answer:
[tex]74.64\ \text{g}[/tex]
Explanation:
Reactants
Magnesium = 24.3 g
Hydrogen chloride= x g
Products
Hydrogen gas = 2.04 g
Magnesium chloride = 96.9 g
As the mass of the reactions is conserved we have
Mass of reactants = Mass of products
[tex]24.3+x=2.04+96.9\\\Rightarrow x=2.04+96.9-24.3\\\Rightarrow x=74.64\ \text{g}[/tex]
Mass of hydrogen chloride is [tex]74.64\ \text{g}[/tex].
uses of ethanol as a reagent
Reagent in synthetic organic chemistry and chromatography. Industrial and laboratory organic solvent. Other uses are in manufacture of denatured alcohol, pharmaceuticals (rubbing compounds, lotions, tonics, colognes), in perfumery. Octane booster in gasoline.
How you find a unknown element (just with the atomic emission spectrum)
how many moles of sulphur are in 53.7 grams of sulphur
Answer:
1.67 mol S
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
53.7 g S
Step 2: Define Conversions
Molar Mass of S - 32.07 g/mol
Step 3: Convert
[tex]53.7 \ g \ S(\frac{1 \ mol \ S}{32.07 \ g \ S} )[/tex] = 1.67466 mol S
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
1.67466 mol S ≈ 1.67 mol S
What is the mass of 0.0467 mol of the element sodium (Na)
Answer:
Explanation:
All periodic tables list different amounts of elemental masses. I'm going to round Sodium to 23
1 mol of sodium = 23
0.0467 mol sodium = x
Cross multiply
1*x = 0.0467 * 23
x = 1.0741 grams