Explanation:
Private enterprise refers to the enterprise owned, managed and controlled by private persons. Public enterprise refers to the enterprise owned, manage and controlled by government. Private enterprise main motive is earning profit. ... Private enterprise involves funds from individuals.
PLS PLS SOMEONE HELP ME ANSWER THESE QUESTIONS PLEEEAAASSSE!!
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Answer:
1)conduction
2) convection
3) conduction
4) radiation
5) radiation
6) radiation
7) conduction
8) conduction
9) radiation
10) convection
Explanation:
not 100% sure
List two metals that will not react with acid
Answer:
Copper(cu) nd gold(au) will not react with acid at all
Explanation:
Balance the equations
Fe + Cl2 =
KMnO4 + HCl =
PhCH3 + KMnO4 + H2SO4 =
calcium hydroxide + carbon dioxide =
describe how electricity moves through wires
Hydrofluoric acid (HF) can be prepared according to the following equation:
CaF2 + H2SO4 2 HF + CaSO4.
How many grams of HF can be prepared from 75.0 g of H2SO4 and 63.0 g of CaF2?
In the above problem, which reactant is limiting and which is in excess?
Given the balanced equation:
( Reaction type : double replacement)
CaF2 + H2SO4 → CaSO4 + 2HFI
We can determine the number of grams prepared from the quantity of 75.0 H2SO4, and 63.0g of CaF2 by converting these grams to moles per substance.
This can be done by evaluating the atomic mass of each element of the substance, and totaling it to find the molecular mass.
For H2SO4 or hydrogen sulfate it's molecular mass is the sum of the quantity of atomic mass per element. H×2 + S×1 + O×4 = ≈1.01×2 + ≈32.06×1 + ≈16×4 = 2.02 + 32.06 + 64 = 98.08 u (Dalton's or Da) or g / mol.
For CaF2 or calcium fluoride, it's molecular mass adds 1 atomic mass of calcium and 2 atomic masses of fluoride due to the number of atoms.
Ca×1 + F×2 = ≈40.07×1 + ≈19×2 = 40.08 + 38 = 78.07 u (Da or Dalton's) or g / mol.
The limiting reactant in the given balanced reaction is sulphuric acid. The mass of HF produced from 75 g of H₂SO₄ is 30 g.
What is limiting reactant?The limiting reactant in a species is the reactant which is fewer in amount and thus determine the yield of the product.
In the given reaction, one mole of calcium fluoride reacts with one mole of sulphuric acid to give two moles of HF. The molar mass of calcium fluoride CaF₂ is 78 g/mol the weight taken here is 63 g. Thus number of moles is 63/78 = 0.87 moles.
The molar mass of sulphuric acid H₂SO₄ is 100g/mol. The weight taken here is 75 g and thus, number of moles is 75/100 = 0.75 moles. One mole of calcium fluoride need one mole of H₂SO₄ . Thus 0.87 neede 0.87 moles of H₂SO₄ . But here we have only 0.75. Thus it is the limiting reactant.
As per the reaction, one mole or 100 g of H₂SO₄ produce 2 moles or 40 g of HF (molar mass = 20 g/mol). Thus mass of HF produced from 75 g is calculated as follows:
mass of HF = (75 × 40)/100
= 30 g.
Hence, mass of HF produced in this reaction is 30 g.
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what is the chemical formula for silver sulfate
Answer:
Ag2SO4
Explanation:
What two uses are used for oxygen?
Answer:
I think your lumgs and your heart but I could be tottaly wrong
Help me out here please???
Answer:
A
Explanation:
Answer:
B
Explanation:
In a chemical reaction, the number of each element should be equal on both the reactant and product side.
The energy released in cellular respiration helps an athlete perform. How do you think an athlete might be able to increase cellular respiration?
pls i will give brainliest
eating healthy foods
working out and eating healthy helps
Answer:
higher as
beacause having a healthy diet inproves
your health
Explanation:
3. According to Newton's First Law of Motion, what does an object at rest do?
stays at rest
begins to move
cannot be moved
continues to move
Answer:
stays at rest
Explanation:
Answer:
stays at rest
Explanation:
Which of the following are reactants in the equation below? Select all that apply.
Zn(s) + CuSO4(aq) = ZnSO4(aq) + Cu(s)
Select all that apply:
A) Zinc
B) Copper
C) Copper (ll) sulfate
D) Zinc sulfate
Answer:
Zinc, copper sulfate
Explanation:
The reactants are the ones on the left side
In the given reaction, it is clearly visible that Zinc and Copper (II) sulfate are the reactants in the equation below. Thus, the correct options are A and C.
What are Reactants?Reactants may be defined as substances or compounds that undergo chemical reactions and have been altered during the course of an incident. Such compounds or substances most of the time are catalyzed by numerous catalysts in order to accomplish the conversion of reactancts substances faster.
The given reaction illustrates an example of a displacement reaction. During this reaction, when zinc is added to copper sulfate solution, zinc displaces copper and forms zinc sulfate solution. It will demonstrate a type of redox reaction.
This happens because on the basis of the reactivity series which determines that zinc is considered to be more reactive than copper.
Therefore, in the given reaction, it is clearly visible that Zinc and Copper (II) sulfate are the reactants in the equation below. Thus, the correct options are A and C.
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if we weigh 30 kgf on the earth,how much will you weigh on the moon
Answer:
5
Explanation: 1/6 of 30 is 5
The Sup atomic particles are
Answer:
protons, neutrons and electrons
Explanation:
i hope it is
Answer:
proton, electron, neutorn
Please help!! it’s only question 34 please..
Answer:
Lavoisier disproved the phlogiston theory. He demonstrated that there was an element called oxygen that played a major role in combustion. He also showed that the mass of products in a reaction are equal to the mass of the reactants. The phlogiston theory did not account for the weight changes found in fire. Lavoisier hypothesized that it was probably the fixation and release of air, rather than fire, that caused the observed gains and losses in weight.
How do the energy and the most probable location of an electron in the third shell of an atom compare to the energy and the most probable location of an electron in the first shell of the same atom?
Answer:
In the third shell, an electron has more energy and is farther from the nucleus. (3) In the third shell, an electron has less energy and is closer to the nucleus.
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, atom consists of shells having different energy.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.
In the third shell, an electron has more energy and is farther from the nucleus. (3) In the third shell, an electron has less energy and is closer to the nucleus.
Therefore, atom consists of shells having different energy.
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Please help meeeee!!
Why is the coefficient of static friction always greater than the coefficient of kinetic friction?
Because in static friction there is more time or enough time for interlocking of irregularities where as there is minimum time for interlocking of irregularities so that kinetic friction is less than that of static friction
what happens when you add a second drip and space both the drips close together? Describe the pattern they form and explain the cause for this pattern in detail.
Answer:
Superposition results in adding the two waves together. Constructive interference is when two waves superimpose and the resulting wave has a higher amplitude than the previous waves. Destructive interference is when two waves superimpose and cancel each other out, leading to a lower amplitude.
Explanation:
I hope I hlep :)
Suppose while walking along the beach, you find a green crystal. Which properties could you use to determine whether the crystal is an emerald?
Explanation:
Emerald is defined by its green color. To be an emerald, a specimen must have a distinctly green color that falls in the range from bluish green to green to slightly yellowish green. To be an emerald, the specimen must also have a rich color.
What do butterflies and lobsters have in common?
Answer:
They all wear their skeletons on the outside! This is called an exoskeleton and all creatures that have their structure on the outside are included in the phylum of Arthropods.
Explanation:
1. What causes frost to form on the outside of a
cold container.
Answer:
condensation
Explanation:
Frost forms when an outside surface cools past the dew point. The dew point is the point where the air gets so cold, the water vapor in the atmosphere turns into liquid. This liquid freezes. If it gets cold enough, little bits of ice, or frost, form
Which symbol and unit of measurement are used for electric current?
a. symbol: C; unit: A
b. symbol: 1; unit: C
C. symbol: 1; unit: A
Answer:
C. symbol: 1; unit: A
Explanation:
The symbol and unit of electric current is given as symbol: I; unit: A
Current is one of the fundamental particles. The unit is given in Amperes which is symbolized as A. Current is given as IAccording to ohms law;
I = [tex]\frac{V}{R}[/tex]
I is the current
V is the voltage
R is the resistance.
Question 107 points)
(02.04 HC
Use examples to explain how the atmosphere interacts with two other of Earth's spheres. Explain the interaction for each using complete
sentences. (7 points)
Answer:
Evaporation from the hydrosphere provides the medium for cloud and rain formation in the atmosphere. The atmosphere brings back rainwater to the hydrosphere. The atmosphere provides the geosphere with heat and energy needed for rock breakdown and erosion. The geosphere, in turn, reflects the sun's energy back into the atmosphere.
Explanation:
What is the formula of copper (iii) carbonate? And what is the name of CuPO4?
.) 1. The Lewis valence dot electron structures are used to illustrate the number of valence electrons of atoms of representative elements. Considering this, use the Periodic Table to predict the number of "dots" that should be drawn around Antimony (Sb) to represent its Lewis Dot Structure.
Answer:
put 5 dots
Explanation:
it has 5 valence electrons
Answer:
5
Explanation:
Antimony is in group 15 of the periodic table which means it has 5 valence electrons. Therefore, its Lewis Diagram should contain 5 dots to represent these 5 valence electrons.
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What type of reaction is illustrated?
which of the following is NOT a substance?
A. sodium
B. water
C. alcohol
D. air
E. table salt
can select more than one if needed
Answer:
c. alcohol
it has no substance
What coefficient well O2 have after balancing this equation
C4H8 + O2 -> CO2 + H2O
A. 4
B. 8
C. 6
D. 2.5
The coefficient for O₂ after balancing the equation is 4. The correct answer is A. 4.
To balance the equation C₄H₈ + O₂ → 4CO₂ + 4H₂O, we need to ensure that the number of each type of atom is the same on both sides of the equation.
Starting with carbon (C), we have 4 carbon atoms on the left side and only 1 on the right side (in CO₂). To balance carbon, we place a coefficient of 4 in front of CO₂:
C₄H₈ + O₂ → 4CO₂ + H₂O
Next, we move on to hydrogen (H). There are 8 hydrogen atoms on the left side, but only 2 on the right side (in H₂O). To balance hydrogen, we place a coefficient of 4 in front of H₂O:
C₄H₈ + O₂ → 4CO₂ + 4H₂O
Now, let's consider oxygen (O). On the left side, we have O₂, which contains 2 oxygen atoms. On the right side, there are 4 CO₂ molecules, each containing 2 oxygen atoms, and 4 H₂O molecules, each containing 1 oxygen atom. So, the total number of oxygen atoms on the right side is (4 x 2) + (4 x 1) = 8.
To balance oxygen, we need to have 8 oxygen atoms on the left side as well. Therefore, we place a coefficient of 4 in front of O₂:
C₄H₈ + 4O₂ → 4CO₂ + 4H₂O
Therefore, the coefficient for O₂ after balancing the equation is 4.
The correct answer is A. 4.
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Quantum Mechanics relies on probability to say what region of space an electron ismostlikelyto occupy. In your own words, describe how this principle results in the shapes ofthe orbitals.
Answer:
Explanation:
Since electrons are particles that are in constant movement in a wave-like motion, is impossible to know exactly their position and velocity at all times. That's why instead of defining an orbit for them we define an atomic orbital, which is a location in space where the probability of finding an electron is high (therefore, is an electron dense zone). Since this zone has not defined limits (the wave function characterizing the orbital extend from the nucleus to infinity), the further we go from the nucleus the less dense this "cloud" is.
There is about a 90 percent probability of finding the electron within a sphere of radius 100 pm surrounding the nucleus. Thus, we can represent the 1 s orbital by drawing a boundary surface diagram that encloses about 90 percent of the total electron density in an orbital, and the shape of this orbital is a sphere.
The boundary surface diagrams of p orbitals, for example, will have the shape of two lobes on opposite sides of the nucleus, that means that within this two lobes we have a 90 percent probability of finding the electron, and so on.
Which evidence is an indication that a chemical reaction has occurred?
formation of a gas
melting of a substance
boiling of a substance
freezing of a substance
Answer: Formation of a gas
Explanation: All of the other options are examples of physical changes not chemical change
Answer:
A. Formation of gas
Explanation:
Took the test and got it correct
