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3 years ago

A Gamma ray is a very high speed particle with no charge?

Chemistry

2 answers:

ANTONII [103]3 years ago

4 0

false a gamma ray is a vary high speed particle with high energy

I am Lyosha [343]3 years ago

3 0

Agamma ray<span> is a </span>very high speed particle<span> with </span>no charge<span>.</span>

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A compound consists of only one type of element?

Gnoma [55]

Answer:

A compound can easily be split up into its different elements.

Explanation:

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3 years ago

What is the molecular formula of the molecule in figure 3

lara [203]

Answer: The molecular formula of the molecule is $CH_3OH$

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.

The given compound contains one carbon atom, four hydrogen atoms and one oxygen atom.

It is an alcohol with functional group -OH and with molecular formula of $CH_3OH$ named as methanol.

The molecular formula of the molecule is $CH_3OH$

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3 years ago

Cortisol (m = 362.47 g/mol) is a steroid hormone involved in protein synthesis. Medically, it has a major use in reducing inflam

Elis [28]

C21H30O5 is its molecular formula

The hydroxyl groups at positions 17 and 21 and the oxo groups at positions 3, 11, and 20 are substituted in the C21 steroid cortisone. Both a mouse and a human metabolite, it serves a purpose.

<h3>Molecular formula: What is it?</h3>

A chemical formula is a way to communicate information in chemistry about the proportions of atoms that make up a specific chemical compound or molecule. Chemical element symbols, numbers, and occasionally other symbols like parentheses, dashes, brackets, commas, and plus and minus signs are used to represent the chemical elements.

A molecule's molecular formula reveals which atoms and how many of each kind are included within it. No subscript is used if there is just one atom of a certain kind. A subscript is added to the symbol for an atom if it contains two or more of a certain type of atom.

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6 0

2 years ago

Answer the following questions…

Zina [86]

The concentration of the hydronium ion in hydrochloric acid is 0.0045 M, and the pH of the solution is 2.34.

pH is the potential of the hydrogen or the hydronium ions in the aqueous solution.

As the solution contains $4.5 \times 10^{-3} \;\rm M\;$ HCl the concentration of the hydronium ion will be the same, $4.5 \times 10^{-3} \;\rm M.$

The pH of the solution is calculated as:

$\begin{aligned} \rm pH &= \rm -log[H^{+}]\\\\&= - \rm log (4.5 \times 10^{-3})\\\\&= 2.34\end{aligned}$

The concentration of the hydroxide ion is calculated from pH and hydronium ion as:

$\begin{aligned} \rm [H_{3}O^{+}][OH^{-}] &= 10^{-14}\\\\&= \dfrac{1 \times 10^{-14}}{4.5 \times 10^{-3}}\\\\&= 2.2 \times 10^{12}\end{aligned}$

Now, for the calcium hydroxide solution, the calculations are shown as,

$\begin{aligned} \rm (H_3}\rm O^{+}) &= \rm antilog (-pH)\\\\&= \rm antilog (-8)\\\\&= 10^{-8} \;\rm M\end{aligned}$

pOH is calculated as:

$\begin{aligned} \rm pOH &= 14- 8 = 6\\\\\rm [OH^{-}] &= \rm antilog (-6)\\\\&= 10^{-6} \end{aligned}$

The concentration of calcium hydroxide is calculated as:

$\begin{aligned} &= \dfrac{1}{2} \times \rm [OH^{-}]\\\\&= 5 \times 10^{-4} \;\rm M\end{aligned}$

Therefore, the pH and the pOH give the concentration of the hydrogen or the hydronium ion and the hydroxide ion.

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2 years ago

If 1.332 mol of C4H10 are reacted with 6.504 mol of O2, how many mol of the excess reagent will remain unreacted? 2 C4H10 + 13 O

Luden [163]

Answer: The number of moles of excess reagent remain unreacted will be, 6.004 moles.

Explanation : Given,

Moles of $C_4H_{10}$ = 1.332 mol

Mass of $O_2$ = 6.504 mol

First we have to calculate the limiting and excess reagent.

The balanced chemical equation is:

$C_4H_{10}+13O_2\rightarrow 10H_2O+8CO_2$

From the balanced reaction we conclude that

As, 13 mole of $O_2$ react with 1 mole of $C_4H_{10}$

So, 6.504 moles of $O_2$ react with $\frac{6.504}{13}=0.5003$ moles of $C_4H_{10}$

From this we conclude that, $C_4H_{10}$ is an excess reagent because the given moles are greater than the required moles and $O_2$ is a limiting reagent and it limits the formation of product.

Number of moles remain unreacted = 6.504 mol - 0.5003 mol = 6.004 mol

Therefore, the number of moles of excess reagent remain unreacted will be, 6.004 moles.

5 0

4 years ago