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Lesechka [4]
3 years ago
8

Sobre ações relacionadas ao aquecimento global, assinale somente as alternativas corretas:

Chemistry
1 answer:
Law Incorporation [45]3 years ago
6 0

Answer:

123456788012346778901234567890

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Which has the largest atomic size selenium or oxygen?
kolbaska11 [484]

Answer:

Selenium

Explanation:

selenium has 4 energy levels (think a 4 story building) while oxygen only has 2 (think 2 story building). which one is taller?

3 0
3 years ago
What is a rule for determining the atomic mass of an atom or ion ?
In-s [12.5K]

Answer:

Mass = Number of neutrons + Atomic number (aka number of protons)

Explanation:

4 0
3 years ago
How many liters of O2 gas will be produced at STP from 4 moles of KC1O3
quester [9]

Answer:

V = 134.5 L

Explanation:

Given data:

Number of moles of KClO₃ = 4 mol

Litters of oxygen produced at STP = ?

Solution:

Chemical equation:

2KClO₃  →  2KCl   + 3O₂

Now we will compare the moles of KClO₃ with oxygen.

                    KClO₃        :           O₂

                        2            :           3

                        4            ;          3/2×4 = 6 mol

Litters of oxygen at STP:

PV = nRT

V = nRT/P

V = 6 mol × 0.0821 atm.L/mol.K × 273 K / 1atm

V = 134.5 L / 1

V = 134.5 L

5 0
3 years ago
The bonds between hydrogen and oxygen in a water molecule are classified as(1) polar covalent
klemol [59]
(1) Ploar covalent. is the answer.
6 0
3 years ago
An aircraft is taking a group of skydivers up into the air. Evan is dressed in
meriva

4,410 kJ

Explanation:

Gravitational Potential Enegry (GPE) is calculated as;

GPE = <em>m*g*h</em>                           where;

m = mass (kg)

g = gravity (m/s²)

h = height (meters)

= 90 * 9.8 * 5000

= 4,410,000‬ joules

= 4,410 kJ

7 0
3 years ago
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