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Phantasy [73]
3 years ago
9

Choose all the right answers.

Chemistry
2 answers:
skad [1K]3 years ago
7 0

changes shape, fixed size

Iteru [2.4K]3 years ago
5 0
I think Is changing shape
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What is the charge and location of a neutron?
Whitepunk [10]

Answer:

There is no charge and it is in nucleus

Explanation:

the neutron is the nuetral one and the protron is positive charger and electron is negative. please let me know if you need me to explain more

6 0
4 years ago
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How many moles of C8H18 contain 9.25 × 1024 molecules of C8H18 ?
fiasKO [112]
<span>One mole of any material contains 6.02 * 10e23 atoms or molecules. This is the Avogadro number. So 9.25 * 10e24 atoms are contained in (9.25*10e24 / 6.02 * 10e23) = 15.36 moles. So the answer is that moles of C8H18 is 15.36 moles</span>
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3 years ago
HEEELP! What are some examples of nuclear fusion? Select all the correct answers.
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A B D

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5 0
3 years ago
The constant
Zigmanuir [339]

Answer:

75 kJ/mol

Explanation:

The reactions occur at a rate, which means that the concentration of the reagents decays at a time. The rate law is a function of the concentrations and of the rate constant (k) which depends on the temperature of the reaction.

The activation energy (Ea) is the minimum energy that the reagents must have so the reaction will happen. The rate constant is related to the activation energy by the Arrhenius equation:

ln(k) = ln(A) -Ea/RT

Where A is a constant of the reaction, which doesn't depend on the temperature, R is the gas constant (8.314 J/mol.K), and T is the temperature. So, for two different temperatures, if we make the difference between the two equations:

ln(k1) - ln(k2) = ln(A) - Ea/RT1 - ln(A) + Ea/RT2

ln (k1/k2) = (Ea/R)*(1/T2 - 1/T1)

k1 = 8.3x10⁸, T1 = 142.0°C = 415 K

k2 = 6.9x10⁶, T2 = 67.0°C = 340 K

ln(8.3x10⁸/6.9x10⁶) = (Ea/8.314)*(1/340 - 1/415)

4.8 = 6.39x10⁻⁵Ea

Ea = 75078 J/mol

Ea = 75 kJ/mol

4 0
3 years ago
A [?] is a heterogeneous mixture whichsettles on standing and its componentscan be separated by filtration.colloidsuspension
elena-14-01-66 [18.8K]

Answer

Suspension

Explanation

A suspension is a heterogeneous mixture of a fluid that contains solid particles sufficiently large for sedimentation

8 0
1 year ago
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