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enyata [817]
2 years ago
8

Milkweed contains a poison known as cardenolides. Monarch butterflies eat the milkweed plant and hold on to this toxic compound.

The chemical formula for cardenolides is shown below.
CH18C20H15CHCO2

How many atoms of each element are in one molecule of cardenolides?




A)
34 carbon atoms, 43 hydrogen atoms, and 2 oxygen atoms




B)
42 carbon atoms, 23 hydrogen atoms, and 2 oxygen atoms




C)
20 carbon atoms, 33 hydrogen atoms, and 2 oxygen atoms




D)
23 carbon atoms, 34 hydrogen atoms, and 2 oxygen atoms
Chemistry
1 answer:
igor_vitrenko [27]2 years ago
4 0

Answer:

the answer is D) 23 carbon atoms, 34 hydrogen atoms, and 2 oxygen atoms

Explanation:

i took the test and got a 100%

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Select all of the physical properties of matter
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Answer:

A) solubility

B)luster

D)Density

F)magnetism

Explanation:

A physical property is one that tells us everything about what a substance is when no change is is occurring to its constituent.

Such properties can be observed with our senses or instruments or pieces of apparatus.

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Cryolite (Na3AlF6) is used in the production of aluminum from its ores. It is made by the reaction 6 NaOH 1 Al2O3 1 12 HF 8n 2 N
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<u>Answer:</u> The mass of cryolite produced in the reaction is 1181.8 g

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}      .....(1)

Given mass of aluminium oxide = 287 g

Molar mass of aluminium oxide = 102 g/mol

Putting values in equation 1, we get:

\text{Moles of aluminium oxide}=\frac{287g}{102g/mol}=2.814mol

The given chemical reaction follows:

6NaOH+Al_2O_3+12HF\rightarrow 2Na_3AlF_6+9H_2O

By Stoichiometry of the reaction:

1 mole of aluminium oxide produces 2 moles of cryolite

So, 2.814 moles of aluminium oxide will produce = \frac{2}{1}\times 2.814=5.628mol of cryolite

Now, calculating the mass of cryolite by using equation 1:

Moles of cryolite = 5.628 moles

Molar mass of cryolite = 210 g/mol

Putting values in equation 1, we get:

5.628mol=\frac{\text{Mass of cryolite}}{210g/mol}\\\\\text{Mass of cryolite}=(5.628mol\times 210g/mol)=1181.8g

Hence, the mass of cryolite produced in the reaction is 1181.8 g

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That salt has a higher melting point than mercury.
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