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3 years ago

79. Methane, the chief component of natural gas, burns in oxygen according to the equation

Chemistry

1 answer:

Andrews [41]3 years ago

6 0

Answer:

14 mol

Explanation:

CH4(g) + 2O2(g) -------» CO2(g) + 2H2O(g)

from reaction 1 mol 2 mol

given 7 mol x mol

x = (7*2)/1 = 14 mol

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Observation what happens when you add distill water salt and lemon juice

Slav-nsk [51]

Answer:

But when we add some salt or the lemon juice to it, it starts conducting electric current and shows deflection of magnetic compass because salts and acids are conductors of electric current when salt or lemon juice is mixed in distilled water it becomes conductor of electricity.

Explanation:

hope this helps

4 0

3 years ago

A reading shows a pressure measurement of 43 in. Hg. What is the equivalent pressure in psi? A. 5.73 psi B. 2223.13 psi C. 26.32

oksian1 [2.3K]

43 inHg = 43 inHg*2.54cm/in = 109.22cmHg * 10 mm/cm = 1092.2 mmHg

14.7 psi = 760 mmHg

1092.2mmHg * 14.7psi / 760 mmHg = 21.13 psi

Answer: option D. 21.13 psi

7 0

3 years ago

Read 2 more answers

How many mol of hydrogen are needed to double the volume occupied by 0.34 mol of hydrogen,

natima [27]

Answer:

0.68

Explanation:

Number of moles is directly propotionalto the volume at standard condition.

6 0

3 years ago

An atom (not a hydrogen atom) absorbs a photon whose associated wavelength is 300 nm and then immediately emits photon whose ass

KIM [24]

Answer:

The net energy is 2.196 eV

Explanation:

Basically, the energy of an atom increases when it absorbs a photon. In addition, the wavelength of the emitted photon is longer such that the atom absorbed a net energy in the process.

Using:

ΔE = h*c*(1/λ $_{1}$ - 1/λ $_{2}$ )

where:

ΔE is the net energy in eV (electron-volt). 1 eV is equivalent to 1.602* $10^{-19}$ J.

h = 4.135* $10^{-15}$ eVs

c = 3* $10^{8}$ m/s

λ $_{1}$ = 300 nm = 300* $10^{-9}$ m

λ $_{2}$ = 640 nm = 640* $10^{-9}$ m

Thus:

ΔE = 4.135* $10^{-15}$ eVs*3* $10^{8}$ m/s*( $\frac{1}{300*10^{-9}m } }-\frac{1}{640*10^{-9}m }$ )

ΔE = 4.135* $10^{-15}$ *3* $10^{8}$ *1.77* $10^{6}$ eV = 2.196 eV

6 0

3 years ago

which of the following halides reacts more slowly in an SN1 reaction: 5-chloro-1,3-cyclopentadiene or 7-chloro-1,3,5-cycloheptat

Rudiy27

Answer:

5-chloro-1,3-cyclopentadiene

Explanation:

5-chloro-1,3-cyclopentadiene will react more slowly in an SN1 reaction. ( i.e. No reaction as the product is unstable ) attached is the representation of the rate of reaction of both Halides which shows that 5-chloro-1,3-cyclopentadiene reacts the slowest .

Also During SN1 reaction Carbocation is formed .

Attached below is the solution explanation

8 0

2 years ago