Give the formula for the alkane containing 100 hydrogens.

Answers

Answer 1

Answer:

Answer: The alkane containing 100 hydrogens will be $C_(49)H_(100)$

Explanation:

Saturated hydrocarbons are defined as the hydrocarbons in which a single bond is present between carbon and carbon atoms.These are called as alkanes. The general formula for these hydrocarbons is $C_nH_(2n+2)$

As given number of hydrogen atoms is 100, therefore the value of (2n+2) = 100

2n = 98

n = 49

Thus the formula for the alkane containing 100 hydrogens will be $C_(49)H_(100)$

Answer 2

Answer:

Final answer:

The alkane containing 100 hydrogens has the formula C49H100.

Explanation:

The formula for the alkane containing 100 hydrogens can be determined using the general formula for alkanes, which is CnH2n+2. To find the value of n, we can set up an equation:

100 = 2n + 2

Simplifying this equation, we get:

n = 49

Therefore, the formula for the alkane containing 100 hydrogens is C49H100.

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Exactly how much time must elapse before 16 grams of potassium-42decays, leaving 2 grams of the original isotope?(1) 8 × 12.4 hours (3) 3 × 12.4 hours(2) 2 × 12.4 hours (4) 4 × 12.4 hours

Answers

The answer is (3) 3 × 12.4 hours

To calculate this, we will use two equations:
$(1/2) ^(n) =x$
$t_(1/2) = (t)/(n)$
where:
n - number of half-lives
x - remained amount of the sample, in decimals
$t_(1/2)$ - half-life length
t - total time elapsed.

First, we have to calculate x and n. x is remained amount of the sample, so if at the beginning were 16 grams of potassium-42, and now it remained 2 grams, then x is:
2 grams : x % = 16 grams : 100 %
x = 2 grams × 100 percent ÷ 16 grams
x = 12.5% = 0.125

Thus:
$(1/2) ^(n) =x$
$(0.5) ^(n) =0.125$
$n*log(0.5)=log(0.125)$
$n= (log(0.5))/(log(0.125))$
$n=3$

It is known that the half-life of potassium-42 is 12.36 ≈ 12.4 hours.
Thus:
$t_(1/2) = 12.4$
$t_(1/2) *n = t$
$t= 12.4*3$

Therefore, it must elapse 3 × 12.4 hours before 16 grams of potassium-42 decays, leaving 2 grams of the original isotope

Answer:

The answer is (3) 3 × 12.4 hours

Which element has the greatest average atomic mass?

Answers

The awnser is Hydrogen. It had the greatest average atomic mass

Which stage of grieving is actually a refusal to believe the event is occurring?A. denial
B. anger
C. bargaining
D. depression

Answers

That stage is the denial stage.

In which compound is the percent by mass of oxygen greatest?A. BeO
B. MgO
C. CaO
D. SrO

Answers

Answer: BeO

Explanation:

percent by mass of oxygen $=\frac{\text {mass of oxygen}}{\text {Total mass of substance}}* 100\%$

percent by mass of oxygen in BeO $=(16g)/(25.01g/mol)* 100=63.97\%$

percent by mass of oxygen in MgO $=(16g)/(40.30g/mol)* 100=39.70\%$

percent by mass of oxygen in CaO $=(16g)/(56.08g/mol)* 100=28.53\%$

percent by mass of oxygen in SrO $=(16g)/(103.62g/mol)* 100=15.44\%$

The answer is A
Hide the Oxygen for a minute
Mass of elements:
Be:9.012
Mg:24.305
Ca:40.078
Sr:87.62
Out of all these choices, Be is the lightest

Bases in solution produce what type of ions?a. sulfide ions
b. chloride ions
c. hydroxide ions
d. hydronium ions

Answers

Bases produce hydroxide ions, while acids produce hydrogen ions.

Bases have a pH of above 7, and are bitter and slippery.

Answer: c. hydroxide ions

Final answer:

Bases in a solution produce hydroxide ions (OH-). This ability to donate a hydroxide ion is what characteristically defines a substance as a base.

Explanation:

When bases dissolve in water, they produce hydroxide ions (OH-). In chemistry, bases are substances that can accept hydrogen ions (H+) or donate a hydroxide ion. For example, when sodium hydroxide (NaOH), a common base, dissolves in water, it dissociates into sodium ions (Na+) and hydroxide ions (OH-). This is the characteristic that defines a substance as a base.

Bases in a solution produce hydroxide ions (OH-). This ability to donate a hydroxide ion is what characteristically defines a substance as a base

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Which of the following most likely requires intermolecular forces?A.a spider walking on the bottom of a leaf
B.a rock maintaining its solid shape
C.a koala using claws to hold onto a tree

Answers

A rock maintaining its solid shape is one that required intermolecular forces. Thus, option (B) is correct.

What are the intermolecular forces?

Intermolecular forces are those forces that maintain chemical interactions between molecules of a substance and other types of particles present in the substance.

Rocks are constructed of different particles held together by various types of intermolecular forces depending on the kinds of particles present in the rock. Intermolecular forces can occur among molecules and other particles in a solid compound.

Intermolecular forces can either be attractive forces or repulsive forces. The molecules of opposite charges such as positive and negative charges can have attraction between them. While repulsion occurs between particles with similar charges such as between positive and positive charges.

The Intermolecular forces maintain the integrity of the structure of that compound. Intermolecular forces in compounds exist such as electrovalent bonds, covalent bonds, Vander Waals forces, hydrogen bonds, etc.

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A spider walkng on the bottem of the leaf

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