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kow [346]
2 years ago
10

Solve question 4a least reactive to most reactive

Chemistry
1 answer:
denis23 [38]2 years ago
7 0
Nickel (II) oxide, iron (III) oxide, chromium (III) oxide, magnesium oxide
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Examine the statement.
Oksana_A [137]
It is true because you can see that the ice cream is physically (melting) changing due to heat.
5 0
3 years ago
What is the half life of the graphed material?
daser333 [38]

Answer:

3 hours

Explanation:

To know the the correct answer to the question given above, it is important we know the definition of half-life.

The half-life of a substance is simply defined as the time taken for half the substance to decay.

Considering the diagram given above, the initial mass of the substance is 100 g.

Half of the initial mass = 100 / 2 = 50 g

Now, we shall determine the time from the graph taken to get to 50 g.

Considering the diagram given above, the time taken to get to 50 g is 3 hours.

Therefore, the half-life of the material is 3 hours.

3 0
3 years ago
The ammonia molecule NH3 has a permanent electric dipole moment equal to 1.47 D, where 1 D = 1 debye unit = 3.34 × 10-30 C-m. Ca
svetoff [14.1K]

The electric potential due to ammonia at a point away along the axis of a dipole is 1.44 \times 10^-5 V.

<u>Explanation:</u>

Given that 1 D = 1 debye unit = 3.34 × 10-30 C-m.

Given p = 1.47 D = 1.47 \times 3.34 \times 10^-30 = 4.90 \times 10^-30.

            V = 1 / (4π∈о)  \times  (p cos(θ)) / (r^2)

where p is a permanent electric dipole,

           ∈ο is permittivity,

            r is the radius from the axis of a dipole,

            V is the electric potential.

        V = 1 / (4 \times 3.14 \times 8.85 \times 10^-12)  \times (4.90 \times 10^-30 \times 1) / (55.3 \times 10^-9)^2

        V  = 1.44 \times 10^-5 V.

8 0
3 years ago
Write the chemical formula for magnesium nitrate hexahydrate
sukhopar [10]

Answer: Mg(NO₃)₂ * 6 H₂O

Explanation:

6 0
1 year ago
An ionic compound has a -----charge, because
ra1l [238]

Explanation:

c. positive., it gains electrons

6 0
2 years ago
Read 2 more answers
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