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kvv77 [185]
3 years ago
10

An atom has 17 protons and 18 neutrons.

Chemistry
1 answer:
Wewaii [24]3 years ago
3 0

Answer:

Cl

Explanation:

cl has mass number 35 and its atomic number is 17 so number of proton =atomic number 17 and number of neutron is =mass number -number of proton =35-17 =18

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A scientist adds iodine as an indicator to an unknown substance. What will this indicator reveal about the substance?
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2 years ago
The rate constant of a first order reaction is 0.035 sec-1. How much of a 1.5 M sample of reactant would remain after 28 seconds
andrey2020 [161]

Answer:

0.56 M

Explanation:

Step 1: Given data

  • Rate constant (k): 0.035 s⁻¹
  • Initial concentration of the reactant ([A]₀): 1.5 M
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Step 2: Calculate the amount of reactant ([A]) after 28 seconds

For a first-order kinetics, we will use the following expression.

ln [A] = ln [A]₀ - k × t

ln [A] = ln 1.5 - 0.035 s⁻¹ × 28 s

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4 0
2 years ago
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q = m c delta T

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7 0
3 years ago
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Answer:

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Explanation:

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3 0
3 years ago
A substance that is made up of a single kinf of atom is called
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