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uranmaximum [27]
3 years ago
15

Q # 6 which of the following equations has correct formulas and also is a balanced equation?

Chemistry
1 answer:
LuckyWell [14K]3 years ago
8 0

Answer:- a)   2Be+O_2\rightarrow 2BeO

First equation is correct since Be is an alkaline earth metal and it has +2 charge. Oxygen also has -2 charge so the formula of beryllium oxide is BeO. Since, oxygen is diatomic, it is written as O_2 and then to balance the equation we need to multiply Be and BeO by 2 and the balanced equation is:  2Be+O_2\rightarrow 2BeO

Second equation is not balanced for hydrogen and potassium. There was actually no need to multiply KCl and HCl by 3. It could simply be written as:

KCl+HNO_3\rightarrow HCl+KNO_3

Third equation is not correct as the product formula is wrong. Mg has +2 charge and O has -2 charge, so the product will be MgO and the balanced equation must be written as:

2Mg+O_2\rightarrow 2MgO

Fourth equation is not correct since metal carbonates gives metal oxide and the carbon dioxide gas on decomposition. Calcium carbonate and calcium oxide formulas are written correctly but the carbon dioxide formula is not written correctly. It must should be [tex[CO_2[/tex] where they have written CO_3  and the correct equation is written as:

CaCO_3\rightarrow CaO+CO_2


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What types of elements join to form molecular compounds? Name three such compounds
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Answer:

NO nitrogen monoxide

N2O dinitrogen monoxide

S2Cl2 disulfur dichloride

Explanation:

4 0
2 years ago
Read 2 more answers
Match the terms to the correct 
Nadusha1986 [10]
This type of energy travels through vibrations on waves = 7. sound energy

This is the energy found in the nucleus of an atom = 9. nuclear energy

This type of energy can be transferred in three different ways = 6. thermal energy

This is the term used when energy changes from one form to another = 10. energy conversions

This has to do with the speed of an object and how much mass it has = 2. kinetic energy

This can be either kinetic or potential and has to do with the energy of position and motion of an object = 1. mechanical energy

This type of energy is stored energy = 3. potential energy

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hope this helps
6 0
3 years ago
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A train travels at a speed of 80 mph. How far does the train travel in 2 h 42 min?<br> miles
VikaD [51]
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80mi/h x 2.7h = (80*2.7)mi = 216mi
4 0
3 years ago
N the molecule below, how many atoms could make hydrogen bonds with water? the compound has a ch2, double bond, chc, double bond
Anna35 [415]
<h3>Answer:</h3>

                10 Atoms

<h3>Explanation:</h3>

The structure of said compound is sketched according to guide lines provided in statement and is attached below.

Hydrogen Bond Interactions:

                     Hydrogen Bond Interactions are those interactions which are formed between a partial positive hydrogen atom bonded directly to most electronegative atom (i.e. F, O and N) of one molecule and the partial negative most electronegative atom of another molecule.

                      In given structure we are having seven most electronegative oxygen atoms (labelled red) and three partial positive hydrogen atoms (labelled blue) directly attached to most electronegative atom (i.e. oxygen atoms).

                      Therefore, the oxygen atoms will make hydrogen bonds with water's hydrogen atoms and the partial positive hydrogen atoms will make hydrogen bonds with water's oxygen atoms respectively.

3 0
3 years ago
A sample of ideal gas has a volume of 0.500-L at 25.0o C and 1.20 atm pressure. What is the volume at 75.0o C and 3.60 atm?
sergeinik [125]

Answer:

.500

Explanation:

Use the ideal gas law equation: PV = nRT

Plug in the initial values given:

P = 1.2 atm

V = .500 L

n = number of moles

R = Gas Constant 8.314

T = 25.0 C

(1.2)(.5) = n(8.314)(25)

solving for n we get .00289

Now use the same equation with the new values solving for V

(3.6)V = (.00289)(8.314)(75.0)

V = .4999999 ROund to .500

3 0
3 years ago
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