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23.07.2020

Carbon dioxide is an example of a molecular compound.
O True
O False

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24.06.2023, solved by verified expert

Bhaskar Singh Bora

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No I think it is false

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Bhaskar Singh Bora

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It’s true because Examples include such familiar substances as water (H2O)
(
H
2
O
)
and carbon dioxide (CO2)
(
CO
2
)
(Figure 3.1.1
3.1.
1
)

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Chemistry

Carbon dioxide is an example of a molecular compound. O True O False

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P Answered by PhD

1

No I think it is false

Chemistry

1. which of the following statements is not true about double-replacement reactions? a. the product may precipitate from solution. b. the product may be a gas. c. the product may be a molecular compound. d. the reactant may be a solid metal. 2. the complete combustion of which of the following substances produces carbon dioxide and water? a. c8h18 b. k2co3 c. cahco3 d. no 3. the equation mg(s) + 2hcl(aq) + h2(g) is an example of which type of reaction? a. combination reaction b. single-replacement reaction c. decomposition reaction d. double-replacement

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P Answered by PhD

The first one is going to likely be A because this is what happens in a precipitation reaction, not in a double replacement reaction. The second one is A because that is Methane, which is a source of fuel. The complete combustion formula is Oxygen + fuel, resulting in CO2 and H2O. The final one is a single-replacement reaction. Hope this helps!

Chemistry

1. which of the following statements is not true about double-replacement reactions? a. the product may precipitate from solution. b. the product may be a gas. c. the product may be a molecular compound. d. the reactant may be a solid metal. 2. the complete combustion of which of the following substances produces carbon dioxide and water? a. c8h18 b. k2co3 c. cahco3 d. no 3. the equation mg(s) + 2hcl(aq) + h2(g) is an example of which type of reaction? a. combination reaction b. single-replacement reaction c. decomposition reaction d. double-replacement

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P Answered by PhD

The first one is going to likely be A because this is what happens in a precipitation reaction, not in a double replacement reaction. The second one is A because that is Methane, which is a source of fuel. The complete combustion formula is Oxygen + fuel, resulting in CO2 and H2O. The final one is a single-replacement reaction. Hope this helps!

Chemistry

To use combustion analysis data to determine an empirical formula a molecular formula expresses the number of each kind of atom in a molecule. for example, the molecular formula for propene, c3h6, indicates three carbon atoms and six hydrogen atoms per molecule. this also means that one mole of propene contains three moles of carbon and six moles of hydrogen. an empirical formula expresses the mole ratio of the elements. the empirical formula for propene is ch2, indicating twice as much hydrogen as carbon. when analyzing unknown compounds in a

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P Answered by Master

0,1 mol of carbon and 0.2 moles of hydrogen were in the original sample.

Explanation:

The combustion reaction of the compound is

$C_{x} H_{y} O_{z} +O_{2} - CO_{2} + H_{2}O$

And the molar mass of CO2 and H2O are 44g/mol and 18g/mol respectively

All the mass of carbon producing the CO2 must come from the carbon of the unknown compound, thus it is necessary to calculate the moles of carbon in 4.4g of CO2

$\frac{4.4gx12g}{44gx12g/mol} = 0.1 mol$ of Carbon

Also, all the mass of hydrogen producing the H2O must come from the hydrogen of the unknown compound, hence it is necessary to calculate the moles of hydrogen in 1.8g of water

$\frac{1.8gx2g}{18gx1g/mol} = 0.2 mol$ of Hydrogen

Chemistry

To use combustion analysis data to determine an empirical formula a molecular formula expresses the number of each kind of atom in a molecule. for example, the molecular formula for propene, c3h6, indicates three carbon atoms and six hydrogen atoms per molecule. this also means that one mole of propene contains three moles of carbon and six moles of hydrogen. an empirical formula expresses the mole ratio of the elements. the empirical formula for propene is ch2, indicating twice as much hydrogen as carbon. when analyzing unknown compounds in a

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P Answered by Master

0,1 mol of carbon and 0.2 moles of hydrogen were in the original sample.

Explanation:

The combustion reaction of the compound is

$C_{x} H_{y} O_{z} +O_{2} - CO_{2} + H_{2}O$

And the molar mass of CO2 and H2O are 44g/mol and 18g/mol respectively

All the mass of carbon producing the CO2 must come from the carbon of the unknown compound, thus it is necessary to calculate the moles of carbon in 4.4g of CO2

$\frac{4.4gx12g}{44gx12g/mol} = 0.1 mol$ of Carbon

Also, all the mass of hydrogen producing the H2O must come from the hydrogen of the unknown compound, hence it is necessary to calculate the moles of hydrogen in 1.8g of water

$\frac{1.8gx2g}{18gx1g/mol} = 0.2 mol$ of Hydrogen

Chemistry

How many moles of HF are in 30.mL of 0.15MHF(aq) ?

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P Answered by Master

Answer: 0.0045 mol
Explanation: Convert 30 ml to l: 30 mL = 0.03 L
Molarity = mol/l
mol = molarity * L
mol = 0.15 * 0.03 = 0.0045 mol
Answer: 0.0045 mol
Explanation: Convert 30 ml to l: 30 mL = 0.03 L
Molarity = mol/l
mol = molarit

Answer: 0.0045 mol
Explanation: Convert 30 ml to l: 30 mL = 0.03 L
Molarity = mol/l
mol = molarit

Chemistry

LaToya uses 50 newtons (N) of force to pull a 500 N cart. Which statements are correct about calculating LaToya s mechanical advantage? Select all that apply.A. The input force is 50 N.B. The output force is 50 N.C. The input force is 500 N.D. The output force is 450 N.E. The mechanical advantage is 10.F. The mechanical advantage is 100.

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P Answered by Master

Answer:

A

Step-by-step explanation:

The input force is 50 N. But it will not create not any change. No mechanical advantage is observed.

Chemistry

Fiona claims that the diagram below shows simple machines, but Chad claims that it shows a compound machine. A man pushes a shopping cart up a ramp. Which statement best explains who is correct? Fiona is correct because less than three machines are shown in the diagram. Fiona is correct because the diagram shows two individual simple machines. Chad is correct because more than one machine is shown in the diagram. Chad is correct because the diagram shows two simple machines doing a job.

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P Answered by Specialist

Answer: b. Fiona is correct because the diagram shows two individual simple machines.

Explanation:
A mechanical device using which we can change the direction or magnitude of force applied is known as simple machine.
For example, in the given diagram there are two individual simple machines.
The machine helps in changing the direction or magnitude of force applied by the man. As a result, it becomes easy for him to carry different things easily from one place to another.
Thus, we can conclude that the statement Fiona is correct because the diagram shows two individual simple machines, is correct.
Answer: b. Fiona is correct because the diagram shows two individual simple machines.

Explanation

Answer: b. Fiona is correct because the diagram shows two individual simple machines.

Explanation

Chemistry

Based on the equation, how many grams of Br2 are required to react completely with 29.2 grams of AlCl3 (5 points)? 2AlCl3 + 3Br2 → 2AlBr3 + 3Cl2

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1

Answer:

52.6 gram

Step-by-step explanation:

It is clear by the equation 2(27+3×35.5)= 267 gm of AlCl3 reacts with 6× 80 = 480 gm of Br2 . So 29.2 gm reacts = 480× 29.2/267= 52.6 gm

Chemistry

Which of the following will have a lower ionization energy than scandium

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P Answered by Master

Calcium (Ca)(On the periodic table, ionization energy increases as you go up and to the right of the periodic table)

Calcium (Ca)(On the periodic table, ionization energy increases as you go up and to the right of the

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