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gizmo_the_mogwai [7]
3 years ago
14

What are the products in a sodium and water reaction?

Chemistry
1 answer:
UkoKoshka [18]3 years ago
7 0

Answer:

Sodium Hydroxide

Explanation:

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What is the mass of 0.28 mole of iron?
vredina [299]

Answer:

Your answer should be 15.68 grams.

Explanation:

Seeing as 1 mole has a mass of 56 g, 56*0.28 would get you 15.68 g.

6 0
3 years ago
Technetium-104 has a half life of 18.0 minutes. how much of a 165.0 g sample remains after 90.0 minutes?
11Alexandr11 [23.1K]

The mass of 165.0 g sample that remains after 90.0 minutes is 5.16 grams

calculation

lambda㏑2/18= 0.0385

m(t)= 165 x e( 0.0385 x90)  =5.16g

8 0
3 years ago
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A person is just as likely to become dehydrated in the cold as in the heat
kicyunya [14]
Yes this is true as in cold conditions our body doesn't feel the urge of water therefore we may become dehydrated not even knowing about it and of course in hot coditions we sweat therefore we loose water.
Hope this helps :).
8 0
3 years ago
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What is the IUPAC name for this molecule above?<br>with explanation step​
Lelechka [254]

Answer:

3,4–diethylheptane

Explanation:

To name the compound given in the question above, the following must be obtained:

1. Determine the functional group of the compound.

2. Determine the longest continuous carbon chain. This gives the parent name of the compound.

3. Identify the substituent groups attached to the compound.

4. Give the substituent groups the lowest possible count by naming them alphabetically.

5. Combine the above to obtain the name of the compound.

Now, we shall name the compound given in the question above as follow:

1. The compound belongs to the alkane family since it has only single bonds.

2. The longest continuous carbon chain is 7 i.e the parent name of the compound is heptane.

3. The substituent group attached to the compound is ethyl (–CH2CH3). There are two ethyl groups attached to the compound.

4. The two ethyl group is at carbon 3 and 4 (i.e number from the right to the upper branch chain).

5. The name of the compound is:

3,4–diethylheptane.

4 0
2 years ago
The half-life of the first-order decay of radioac- . 14C . b l:Ive 1s a out 5720 years. Calculate the rate constant for the reac
Alinara [238K]

Answer:

a. Rate constant: 1.2118x10⁻⁴ yrs⁻¹

b. The age of the object is 20750 years

Explanation:

a. We can solve the rate constant in an isotope decay by using Half-Life, as follows:

K = Ln 2 / Half-life

K = ln 2 / 5720 years =

<h3>1.2118x10⁻⁴ yrs⁻¹</h3><h3 />

b. The general equation of isotope decay is:

Ln [A] = -kt + Ln [A]₀

<em>Where [A] is concentration of the isotope after time t, </em>

<em>k is rate constant</em>

<em>and [A]₀ initial concentration of the isotope.</em>

<em />

Computing the values of the problem:

Ln [0.89x10⁻¹⁴] = -1.2118x10⁻⁴ yrs⁻¹t + Ln [1.1x10⁻¹³]

-2.5144 = -1.2118x10⁻⁴ yrs⁻¹t

20750 years = t

The age of the object is 20750 years

<em />

4 0
2 years ago
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