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3 years ago

In terms

Chemistry

1 answer:

Likurg_2 [28]3 years ago

4 0

Answer:

An ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms.

Explanation:

none

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Question 27

3241004551 [841]

Answer:

24.9mL of the stock solution are required

Explanation:

To solve this question we have to find, as first, the moles of HCl that we need to prepare the desire solution. These moles are taken from the stock solution as follows:

<em>Moles diluted solution:</em>

500.0mL = 0.5000L * (0.613mol / L) = 0.3065 moles HCl

As these moles comes from the 12.3M HCl solution, the volume that we need of the stock solution is:

<em>Volume stock solution:</em>

0.3065 moles HCl * (1L / 12.3moles) = 0.0249L 12.3M HCl =

<h3>24.9mL of the stock solution are required</h3>

3 0

3 years ago

A concept is the general idea of objects, events, animals, or people based on common features, traits, or characteristics. Pleas

11Alexandr11 [23.1K]

Answer:

This question is asking whether the statement is TRUE OR FALSE

THE ANSWER IS TRUE

Explanation:

A concept, as rightly defined, is the general idea of an entity, which can include objects, events, animals, or people based on common features, traits, or characteristics. Hence, the CONCEPT of something refers to a a generalized idea about that particular thing.

A concept in other words is our thought about something i.e. how we conceive or think that thing to be. Concept is a phenomenon of the "MIND" since it is abstract and cannot be seen. Based on this, the definition given in the question is TRUE.

7 0

4 years ago

10 moles of hydrogen are allowded to react with 6 moles of oxygen .How much water molecules are obtained?

DiKsa [7]

Answer:

Since 2H₂ + O₂ ---> 2H₂O

We need 2 moles of hydrogen for each mole of oxygen

So, we need 2(6) = 12 moles of H₂ but since we only have 10 moles,

H₂ is the limiting reagent

So since 2 moles of H₂ gives 2 moles of water,

10 moles of H₂ will give rise to 10 moles of Water with 1 mole of remaining oxygen

5 0

3 years ago

Suppose that you obtain 1.0 g of isopentyl acetate from reacting 1.0 mL of acetic acid with 1.0 mL of isopentyl alcohol. Calcula

Elden [556K]

Answer:

83.72%

Explanation:

The equation of of Reaction is given below;

CH3COOH + C5H11OH ------> CH3COOC5H11 + H2O. --------------(1).

The equation (1) shows that one mole of acetic acid react with one mole of isopentyl alcohol to give one mole of isopentyl acetate and one mole of water.

RATIO===> 1 : 1 ------> 1 : 1.

We are given 1.0 mL of acetic acid and 1.0 mL of isopentyl alcohol.

===> Things to know: The density of acetic acid = 1.05 g/cm^3 and the density of isopentyl alcohol= 0.809 g/cm^3, 1 mL = 1 cm^3, molar mass of isopentyl alcohol = 88.179 g/mol.

So, the density of acetic acid = 1.05 g/mL and the density of isopentyl alcohol= 0.809 g/mL.

Therefore, mass of acetic acid;

= 1.0 mL acetic acid ×( 1.05 g/ mL).

= 1.05 g acetic acid.

Mass of isopentyl alcohol= 1.0 mL × 0.809 g/mL = 0.809 grams isopentyl alcohol.

Since one mole of each reactants formed the product, we have to find the limiting reagent. This is done by converting the mass into moles.

Hence, for acetic acid; the number of moles = mass/molar mass.

===> 1.05 grams of acetic acid/ 60.052 g/mol.

===> 0.017485 moles acetic acid.

For isopentyl alcohol; 0.809/ 88.179 grams per mol.

==> 0.0091745 mol isopentyl alcohol.

We can see that isopentyl alcohol is the limiting reagent. So, 0.0091745 mole isopentyl alcohol will produce 0.0091745 mol isopentyl acetate.

Hence, the mass of isopentyl acetate= number of moles × molar mass= 0.0091745 × 130.19 grams per mol.

==> 1.19 grams isopentyl acetate.

FINAL STEP: calculating the percent yield. The actual yield is 1.0 g, theoretical yield = 1.19 grams

Percent yield = actual yield/ theoretical yield × 100.

Percent yied;

= 1.0 grams/ 1.19 grams × 100.

= 83.72 %.

8 0

4 years ago

A 4.36-g sample of an unknown alkali metal hydroxide is dissolved in 100.0 mL of water. An acid-base indicator is added and the

Levart [38]

Answer:

a. 102.6g/mol

b. Rb⁺

Explanation:

a. The unknown base, XOH, <em>Where X is the alkali metal</em>, reacts with HCl thus:

XOH + HCl → H₂O + XCl

<em>Where 1 mole of the hydroxide reacts per mole of acid. </em>

Moles of HCl spent to reach the equivalence point are:

17.0mL = 0.017L ₓ (2.50mol / L) = 0.0425moles of HCl

As 1 mole of HCl reacts with 1 mole of base, moles of base are 0.0425 moles.

Molar mass of a compound is the ratio between mass in grams and moles of substance, that is:

4.36g / 0.0425mol =

b) Molar mass of OH is 17g/mol, thus, the molar mass of the alkali metal is:

102.6g/mol - 17g/mol = 85.6g/mol

The mass of Rb is 85.5g/mol, thus, the identity of the alkali metal is

3 0

3 years ago