Answer:
The answer is 6.83 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of iron (II) oxide = 76.6 g
volume = 12 mL
We have
[tex]density = \frac{76.6}{12} \\ = 6.3833333...[/tex]
We have the final answer as
6.83 g/mL to the nearest hundredthHope this helps you
Answer:
it 76.6
Explanation:
cause it is what it is
Carbon-14 has a half-life of 5730 years. How much of a 144 g sample of carbon-14 will remain after
1.71910 years
Answer:
i miss you
Explanation:
When calcium carbonate is heated, it decomposes to form calcium oxide and carbon dioxide. This reaction is represented by the following equation: CaCO3 arrow CaO+ CO2
ii from the balanced equation, state the number of moles of calcium
oxide produced
Answer:
Chemical reaction involved is:
CaCO
3
→CaO+CO
2
Molar mass of CaCO
3
=40+12+16×3=100 g
According to the balanced reaction 100 g of CaCO
3
produces 1 mol of CO
2
i.e. 22.4 L at STP.
∴50 g CaCO
3
will produce
100
22.4
×50=11.2 L CO
2
at STP.
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Considering the reaction stoichiometry, from the balanced equation and reation stoichiometry, the number of moles of calcium oxide produced is 1 mole.
Chemical reactions are characterized by the appearance of new substances from others. That is, they are processes in which the nature of the substances changes, that is, from some initial substances called reagents, totally different ones called products are obtained.
In this case, you know that the balanced reaction is:
CaCO₃ → CaO + CO₂
Stoichiometry establishes relationships between the molecules or elements that make up the reactants of a chemical equation with the products of said reaction. In other words, stoichiometry determines the ratios between reactants and products in a chemical reaction.
The stoichiometry of a chemical reaction is perfectly established by the chemical equation. In it, the formulas of reactants and products appear preceded by numbers (the stoichiometric coefficients) that indicate the proportions according to which the transformation occurs.
The stoichiometric coefficients of a chemical equation are due to the fact that the atoms present before the reaction must be the same after the reaction, even though the atoms will have been rearranged to produce new substances.
In this case, by reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:
CaCO₃: 1 moleCaO: 1 moleCO₂: 1 moleIn summary, from the balanced equation and reation stoichiometry, the number of moles of calcium oxide produced is 1 mole.
Learn more:
brainly.com/question/16487206?referrer=searchResults brainly.com/question/14446695?referrer=searchResults brainly.com/question/11564309?referrer=searchResults brainly.com/question/4025026?referrer=searchResults brainly.com/question/18650135?referrer=searchResultsThe acceleration of a moving object can be calculated by dividing the change in velocity by the change in blank
Answer:
The acceleration of a moving object can be calculated by dividing the change in velocity by the change in TIME
Explanation:
Took the practice
Scientists want to eventually collect data from the surface of Venus. Which is a technology that could be used to collect samples and determine if it was habitable? a rover vehicle that can withstand the harsh Venus environment satellites that predict locations for water formation on Venus computer simulations that model the formation of Venus a telescope that records information about the weather patterns on Venus
Answer:
A:
Explanation:
Because im smart
will yall help me, please
Answer:
D. create metal works of art. The bronze age was the age of crafting out of metal. So, using swords of metal would fit directly into the bronze age as they're metal.
If Isaiah boiled 10 liters of water at 100°C, at which temperature would he boil 20 liters of water?
Group of answer choices
200°C
10°C
20°C
100°C
SOMEONE ANSWER DA QUESTON
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 part of the atom canot have its part acuratly determined ill give brainlest hurry
Answer:
The answer to this question would be electron.
Electron is located on the outer side of the atom and constantly moving in an orbit so its location cannot be accurately determined. The cloud around the center of the atom is drawn to picture the orbit.
Neutron and proton located in the middle of an atom in a part that called nucleus. Nucleus location is kept at the center and it doesn't move.
Explanation:
In 1897, Joseph Thomson discovered that atoms contained electrons. He proposed a change in the atomic theory of that time, and the theory was modified because of his discovery. Since Thomson's discovery, atomic theory has been further modified. What is the best explanation for why scientific theories are modified?
Answer:
because it is a theory
Explanation:
The best explanation for why scientific theories are modified is simply because it is a theory. Theories are created as a set of suppositions that help humanity understand something that would otherwise be unexplainable. Since they are not proven through scientific facts but instead are more of ideas that help further our understanding of a phenomenon, they tend to be modified as new ideas are introduced and others are proven to be false/wrong.
The outer most energy level of the electron cloud is referred to as the Valence Shell.
O True
O False
The number of electrons (e- ) is
Answer:
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
Explanation:
What do you need to form a cloud?
moisture, condensation, and temperature. 2. Evaporation and condensation are part of how a cloud forms.
why can liquids not be compressed easily
Answer :The reason why compression is more difficult is a direct illustration of quantum mechanics.
What are the 3 components of an electromagnet?
Answer:
An electromagnet is a coil of wire wrapped around a bar of iron or other ferromagnetic material. When electric current flows through the wire, it causes the coil and iron bar to become magnetized. An electromagnet has north and south magnetic poles and a magnetic field.
Explanation:
The three main components of an electromagnet are the iron core, copper wire, and an electricity source.
What is an electromagnet?An electromagnet is a magnet in which a coiled or wrapped wire is given electricity. When Current is given to this wire, it acts like a magnet. An electromagnet is used to create a magnetic field.
The three main parts of the electromagnet are the iron core, that is the magnet, which is a small round, or square brick-like. The wire, wire, is made up of copper. The electricity source, by which electricity is given to the electromagnet.
Examples of electromagnets are induction cookers, doorbell rings, etc. They are controllable and adjustable magnets and are used in most electric appliances.
Thus, the three parts are the iron core, copper wire, and an electricity source.
To learn more about electromagnet, refer to the below link:
https://brainly.com/question/3427992
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A volume is measured experimentally as
4.09 mL. What is the percent error, given
that the correct value is 4.13 mL?
Answer in units of %.
Answer:
The answer is 0.97 %Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual volume = 4.13 mL
error = 4.13 - 4.09 = 0.04
We have
[tex]p(\%) = \frac{0.04}{4.13} \times 100 \\ = 0.968523002...[/tex]
We have the final answer as
0.97 %Hope this helps you
What causes a static charge
Answer:
Separating or rubbing materials.
Explanation:
Static electricity occurs when positive (+) or negative (−) electrical charges collect on an object's surface. There are several ways this condition can be caused.
1.if I drove 40 miles west in 2 hours what is my velocity
2.find the time it takes for a bird that travels 15 miles per hour for 3 hours
1. v= 20 miles/hr
2. d = 45 miles
Further explanationVelocity is a vector that has both magnitude and direction
Velocity is the ratio of distance per time
Can be formulated :
[tex]\tt v=\dfrac{d}{t}[/tex]
v , m/s
d , m
t, s
1. d = 40 miles
t = 2 hr
[tex]\tt v=\dfrac{40~miles}{2~hr}\\\\v=20~miles/hr[/tex]
2. maybe you meant the distance traveled
v = 15 miles/hr
t = 3 hr
[tex]\tt d=v\times t\\\\d=15\times 3\\\\d=45~miles[/tex]
PHOTO ABOVE
Answer Choices:
-Sp
-Sp2
-Sp3
-Sp4
I don’t get this!
Answer:
By just counting sigma bond and lone pair in central atom , one can easily find hybridization.
CO2 sp
SO2 sp2
NH3 sp3
BCl3 sp2
how do i find out the subscripts of an ionic compound?
Answer:
1. Write the symbol and charge of the cation (metal) first and the anion (nonmetal) second. 2. Transpose only the number of the positive charge to become the subscript of the anion and the number only of the negative charge to become the subscript of the cation
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
The its motion______ energy of an object is related to both the object's position and it's motion.
O A) kinetic
OB) potential
C) mechanical
Answer:
mechanical
Explanation:
cause mechanical energy is the sum of potential and kinetic enery
How many reflector surfaces does a radio telescope have?
Answer:
I believe 2
Explanation:
Primary parabolic reflector and the sub reflector
Which has a greater energy, a photon of yellow light, or a photon of green light
Answer:
A photon of green light has a higher energy since it has a higher frequency than the yellow photon. And we can see that on the picture representation of the light spectre.
Potassium hydroxide (KOH) reacts with sulfuric acid (H2SO4) to produce potassium sulfate (K2SO4) and water (04.03 MC)
Answer: A double replacement because potassium ions bond with sulfate ions to form a salt
Explanation:
Which element has a greater atomic radius Mg or Cl?
What is the for this Name 0.1013
Answer:
it s not on periodic table this is not real element
Explanation:
Melting can be best described as a process in which molecules
lose kinetic energy and move slowly.
lose kinetic energy and remain stationary.
gain kinetic energy and escape into the atmosphere.
gain enough kinetic energy to get past each other.
Answer:
Your answer is D (gain enough kinetic energy to get past each other.)
Explanation:
Melting can be best described as a process in which molecules gain enough kinetic energy to get past each other and the correct option is option D.
What is melting?
Melting is the process by which a substance changes from the solid phase to the liquid phase. Melting is also known as fusion, although this term has several meanings in science.
Melting occurs when the kinetic energy of a solid increases by application of heat or pressure, such that the molecules of solid start vibrating faster but stay close to their neighboring particles, rolling around each other. This particle movement allows the substance to flow and form a liquid.
Therefore, melting can be best described as a process in which molecules gain enough kinetic energy to get past each other and the correct option is option D.
Learn more about Melting, here:
https://brainly.com/question/12499685
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How many oxygen atoms are there in 3 molecules of CH3FO?
Answer: There should be 3.
Explanation:
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Which molecule has more atoms, water or acetone?
Answer:
I think acetone has more because water is just H20
Answer:
Acetone
Explanation:
Acetone has three carbon atoms, six hydrogen atoms, and one oxygen atom.
When water has an oxygen atom and two hydrogen atoms.
Which of the questions would involve the investigation of kinetic energy?
A. What material makes the strongest boat?
B. How does the color of a boat affect heat absorption?
C. Do boats float higher in salt or fresh water?
D. What is the effect of a boat’s shape on its speed?
Answer:
D. What is the effect of a boat’s shape on its speed?
Explanation:
Kinetic energy can be defined as the energy possessed by an object or body due to its motion. It is the amount of work required to accelerate an object or body with a specific mass from its point of initial rest to a final velocity.
Mathematically, kinetic energy (K.E) is equal to 1/2(mv²).
Hence, the question which would involve the investigation of kinetic energy is "what is the effect of a boat’s shape on its speed?" because speed is directly related to the motion of the boat. Generally, the shape of the hull of a boat has an effect on the speed of the boat.
Answer:
What is the effect of a boat’s shape on its speed?
