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Romashka-Z-Leto [24]
4 years ago
9

An atom that has an atomic number of 38 and a mass number of 88 is an isotope of an atom that has An atom that has an atomic num

ber of 38 and a mass number of 88 is an isotope of an atom that has an atomic number of a. 38 and a mass number of 86. b. 50 neutrons and 38 protons. c. an atomic number of 39 and a mass number of 88. d. 50 protons and 38 neutrons.
Chemistry
1 answer:
gayaneshka [121]4 years ago
3 0

Answer: Option b. 50 neutrons and 38 protons.

Explanation:

Atomic number = proton number = 38

Mass number = proton number + Neutron

Mass number = 88

Proton = 38

Neutron number =?

Neutron number = Mass number — proton number

Neutron number = 88 —38 = 50

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At high temperatures, carbon reacts with O2 to produce CO as follows: C(s) O2(g) 2CO(g). When 0.350 mol of O2 and excess carbon
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Answer:

Value of K_{c} is 0.090.

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Initial molarity of O_{2} = \frac{0.350}{5.00}M = 0.0700 M

Construct an ICE table corresponding to the combustion reaction of carbon to determine K_{c}

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              I (M):    -      0.0700        0

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So, K_{c}=\frac{[CO]^{2}}{[O_{2}]}  , where [CO] and [O_{2}] represents equilibrium concentration of CO and O_{2} respectively.

Here, [CO]=2x=0.060

       ⇒x = 0.030

So, [O_{2}] = 0.0700-x = (0.0700-0.030) = 0.040

Hence,  K_{c}=\frac{(0.060)^{2}}{0.040}=0.090

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What is the pattern or arrangement in your store’s aisles?
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The enthalpy of combustion of 1 mole of benzene is 3169 kJ/mol .

The first step in answering this question is to obtain the balanced thermochemical equation of the reaction. The thermochemical equation shows the amount of heat lost or gained.

The thermochemical equation for the combustion of benzene is;

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