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3 years ago

Are you absolutely sure this is right?

Chemistry

1 answer:

Natalka [10]3 years ago

4 0

Um yes or no or Mamie <span />

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What is the true ratio of atoms in a molecule or formula unit called?

Colt1911 [192]

Answer:

O the molecular formula

Explanation:

The true ratio of atoms in a molecule or formula unit is called the molecular formula.

The molecular formula of a compound shows the true number of atoms that are combining to form a compound.

For example, the molecular formula of water is H₂O.

Empirical formula of a compound is its simplest ratio.
When the number of atoms are divided by the smallest possible factor, it yields the empirical formula.

3 0

3 years ago

Hydrogen has 3 isotopes 1 H 2 H and 3 H. What is the difference between these 3 isotopes

Anarel [89]

Answer:

See below.

Explanation:

1 H (hydrogen) has a nucleus of just 1 proton.

2 H (deuterium) has a nucleus of 1 proton and 1 neutron

3 H (tritium) has a nucleus of 1 proton and 2 neutrons.

5 0

3 years ago

Read 2 more answers

Please Help 8-9!!!!!!!

seropon [69]

The labeled diagram is given in the image attached.

As it can be seen from the image that freezing is when energy is removed from the system at 0 ⁰ while melting is when energy is added at 0⁰.

Also when energy is added at 100⁰C, it causes boiling while when it is removed at 100⁰C, it causes condensation.

Melting point of water is 0⁰C while boiling point is 100⁰C

3 0

3 years ago

How many protons, electrons, and neutrons does an atom with atomic number 50 and a mass number of 125 contain?

EleoNora [17]

Answer:

a) 50 protons, 50 electrons, 75 neutrons

Explanation:

How many protons, electrons, and neutrons does an atom with atomic number 50 and a mass number of 125 contain?

a) 50 protons, 50 electrons, 75 trons

b) 75 electrons, 50 protons, 50 neutrons

c) 120 neutrons, 50 protons, 75 electrons

atomic number IS the number of protons

atomic mass IS the total of protons + neutrons

so 50 protons

125-50 = 75 neutrons

in a neutral atom,

number of negative electrons = number of positive protons

a) 50 protons, 50 electrons, 75 neutrons

3 0

3 years ago

The initial concentration of reactant in a first-order reaction is 0.27 M. The rate constant for the reaction is 0.75 s−1. What

e-lub [12.9K]

Answer:

≈ 0.10M

Explanation:

[A]o = 0.27M

Rate constant, k = 0.75 s−1

[A] = ?

time, t = 1.3

Integrated formular for a first order reaction is given as;

ln[A] = ln[A]o − kt

ln[A] = ln(0.27) - 0.75(1.3)

ln[A] = -1.309 - 0.975

ln[A] = -2.284

[A] = 0.1019M ≈ 0.10M

4 0

4 years ago

Read 2 more answers