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4 years ago

There are several ways to model a compound. One type of model is shown. What is the chemical formula for the molecule modeled?

Chemistry

2 answers:

Pavel [41]4 years ago

8 0

Answer:

C. C₆H₁₂O₂

Explanation:

Step 1: Count the number of H atoms

12 H atoms present

Step 2: Count the number of C atoms

6 C atoms present

Step 3: Count the number of O atoms

2 O atoms present

Step 4: Combine

C₆H₁₂O₂

Eddi Din [679]4 years ago

6 0

Answer: C. C₆H₁₂O₂

Explanation: On Edgenuity!!

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What is the limiting reactant ?

Sav [38]

The limiting reagent in a chemical reaction is the substance that is totally consumed when the chemical reaction is complete. The amount of product formed is limited by this reagent, since the reaction cannot continue without it.

4 0

4 years ago

The mass of 0.0321 moles of Ca (CN)2

a_sh-v [17]

The mass of Ca(CN)2 : 92,11 g/mol

<h3>Further explanation</h3>

Given

0.0321 moles of Ca(CN)2

Required

The mass

Solution

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

mol(n) = mass(m) : MW(molecular weight)

Input the value :

mass = mol x MW Ca (CN)2

mass = 0.0321 x 92,11 g/mol

mass = 2.957 g

5 0

3 years ago

If you dissolve 0.1 mol of formic acid in 1 L of water, ther esulting solution contains 0.004 mol of H₃O+. Based on this informa

zhuklara [117]

In an ideal case, the acid would completely protonate. such an acid would be a strong acid. Dissociation of Formic acid looks like:

HCOOH + H₂O → COOH⁻ + H₃O⁺

one mole of formic acid should give one mole of Hydronium(H₃O⁺) ions

similarly, 0.1 moles of formic acid should produce 0.1 moles of hydronium ions. but we know that it is not the case, a much lesser amount is actually formed.

Which means that Formic acid did not completely dissociate into COOH⁻ and H⁺ ions.

Hence, Formic Acid is a weak acid

5 0

3 years ago

Does a reaction occur when aqueous solutions of chromium(III) sulfate and calcium nitrate are combined

kotykmax [81]

Answer: $Cr_2(SO_4)_3(aq)+3Ca(NO_3)_2(aq)\rightarrow 2Cr(NO_3)_3(aq)+3CaSO_4(aq)$

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The balanced chemical equation when when aqueous solutions of chromium(III) sulfate and calcium nitrate are combined is:

$Cr_2(SO_4)_3(aq)+3Ca(NO_3)_2(aq)\rightarrow 2Cr(NO_3)_3(aq)+3CaSO_4(aq)$

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3 years ago

Manganese metal can be obtained by the reaction of manganese dioxide with aluminium. 4Al(s) + 3MnOz(s) → 2 Al2O3(s) + 3 Mn(s) Ca

Snezhnost [94]

Answer : The enthalpy change of reaction is -1800 kJ

Explanation :

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

The given final reaction is,

$4Al(s)+3MnO_2(s)\rightarrow 2Al_2O_3(s)+3Mn(s)$ $\Delta H=?$