What is a solid formed from liquid reactants during chemical reaction

Answers

Answer 1

Answer: A solid formed from liquid reactants chemical reactions is called a precipitate.

Answer 2

Answer: It is called a precipitate. Precipitates allow you to determine many things about a chemical reaction (that you will get to know in high school).

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Suppose 300 mL of 0.50 M lithium bromide solution and 300 mL of 0.70 M rubidium bromide solution are combined. What is the concentration of the bromide ion in the resulting solution?

Answers

Answer:

0.60 mol·L⁻¹

Explanation:

Data:

LiBr: c = 0.50 mol/L; V =300 mL

RbBr: c = 0.70 mol/L; V =300 mL

1. Calculate the moles of Br⁻ in each solution

(a) LiBr

$\text{Moles} = \text{0.300 L} * \frac{\text{0.50 mol}}{\text{1 L}} = \text{ 0.150 mol}$

(b) RbBr

$\text{Moles} = \text{0.300 L} * \frac{\text{0.70 mol}}{\text{1 L}} = \text{ 0.210 mol}$

2. Calculate the molar concentration of Br⁻

(a) Moles of Br⁻

n = 0.150 mol + 0.210 mol = 0.360 mol

(b) Volume of solution

V = 300 mL + 300 mL = 600 mL = 0.600 L

(c) Molar concentration

$c = \frac{\text{moles}}{\text{litres}} = \frac{\text{0.360 mol}}{\text{0.600 L}} = \textbf{0.60 mol/L}$

The concentration of Br ions in the resulting solution of LiBr and RbBr has been 0.6 M.

The addition of LiBr and RbBr has been dissociated into the equal moles of Li, Rb, and Br.

$\rm LiBr\;\rightarrow\;Li^+\;+\;Br^-$

$\rm RbBr\;\rightarrow\;Rb^+\;+\;Br^-$

Thus 1 mole of LiBr = 1 mole Br

1 mole RbBr = 1 mole Br.

The moles of LiBr in 0.5 M solution:

Molarity = $\rm moles\;*\;(1000)/(volume\;(ml))$

0.5 = $\rm moles\;*\;(1000)/(300\;ml)$

Moles of LiBr = 0.15 mol

The moles of Br from LiBr = 0.15 mol.

The moles of RbBr in 0.7 M solution:

Molarity = $\rm moles\;*\;(1000)/(volume\;(ml))$

0.7 = $\rm moles\;*\;(1000)/(300\;ml)$

Moles of RbBr = 0.21 mol

The moles of Br from RbBr = 0.21 mol.

The total moles of Br ions from LiBr and RbBr has been :

= 0.15 + 0.21

= 0.36 mol.

The total volume of the solution will be:

= 300 + 300 ml

= 600 ml.

The concentration of the Br ion has been:

Molarity = $\rm moles\;*\;(1000)/(volume\;(ml))$

Molarity of Br ions = $\rm 0.36\;*\;(1000)/(600\;ml)$

Molarity of Br ions = 0.6 M.

The concentration of Br ions in the resulting solution of LiBr and RbBr has been 0.6 M.

For more information about the concentration of the sample, refer to the link:

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Asexual organisms, as compared to sexual organisms, tend to be smaller, have shorter life spans, and produce little or no genetic variability between generations. This makes it harder for an individual asexual organism to survive and reproduce. What is one advantage that asexual organisms have that helps them to overcome these disadvantages?They never need to sleep.
A They are able to find food easier.
B They have higher reproductive rates.
C They use energy more efficiently.

Answers

Answer: B They have higher reproductive rates.

Asexual reproduction is a mode of reproduction, which takes place in simple organisms. This mode of reproduction does not require the formation of gametes by the living organisms. The offsprings produced are usually larger in number as compared to those produced in the sexual mode of reproduction. The offsprings are genetically identical to the parent organisms.

Although, the life span of the asexually reproducing organisms is low, and the organisms produced are typically shorter than the sexually reproducing organisms. But, they have higher reproductive rates than sexually reproducing organisms. This because of the fact that these organisms are simple. They do not require to form or develop sex cells like sexually reproducing organisms. They just require favorable environment conditions to develop a new organism. For example, budding in yeast, the bud develops as an outgrowth on mother yest cell, which detaches in maturity and germinate to form new yeast organism.

They have higher reproductive rates and therefore the young have more of a chnce of surviving

How many electrons can be held in the second orbital (closest to the nucleus)

Answers

The number of electrons that can be held in the second orbital (closest to the nucleus) is 8 electrons

How to determine the number of electrons in the 2nd orbital?

The arrangementof electrons in various energy levels or orbital follows a well defined order. This can be determined by using the following formula:

Number of electrons = 2n²

Where

n is the number of orbital/shell

Now, we shall obtain the number of electrons in the second orbital. Details below:

Number of shell = 2
Number of electrons =?

Number of electrons = 2n²

= 2 × 2²

= 2 × 4

= 8 electrons

Thus, the number of electrons in the second orbital is 8 electrons

Learn more about number electrons in energy levels:

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the orbital is called an energy level and they follow an 2/8/8 rule.
2 in the first
8 in the second
and
8 in the third.
so 8 would be the answer.

Which of the following best describes a mixture? *two or more substances combine and cannot be separated

two or more substances combine chemically

two or more substances combine but keep their physical properties

two or more substances combine and create an irreversible reaction

Answers

Mixtures are combination of two or more substances which can be separated based on their physical properties. Hence, option c best describes a mixture.

What are mixtures?

Mixtures are substances formed by the combination of two or more individual components. The mixing can be of physical or chemical type. The individual components can be separated using some techniques based on their physical properties.

There are both homogenous mixtures and heterogenous mixtures. In homogenous mixtures the components are uniformly mixed and form a single phase.

Heterogenous mixtures are composed of components forming different phases. They can be easily separated using simple techniques. Irrespective of the type of mixing, the physical properties of the components are maintained as such in a mixture. Hence, option c is correct.

Find more on mixtures:

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Answer: two or more substances combine but keep their physical properties or two or more substances combine and create an irreversible reaction.

Explanation: Because i tried the other two and they didnt work so yeah thats life and i got a d on my test thx for the wrong info person before me.

Compare and contrast (similar and different) heterogenous and homogenous mixtures

Answers

Homogenous mixture is a mixture of the "same" , uniform though out. Like mixing salt into water and the salt dissolves.
Heterogenous mixture is a mixture that is not uniform. Like mixing oil and water. You can see the two compounds within the mixture.

What are four everyday items that rely on the behavior of gases to operate properly?

Answers

Four commonplace items that depend on gas behavior to function effectively. Legs, arms, hands, and feet. window, chair, table, and shoes. air brakes, air compressors, air tires, and aerosol cans.

What is gas ?

One of the four basic states of matter, along with solid, liquid, and plasma, is gas. Individual atoms, elemental molecules derived from a single type of atom, or complex molecules derived from a number of atoms can all be found in a pure gas. A variety of pure gases can be found in a gas mixture like air.

If temperature and pressure remain constant, doubling the moles of a gas results in a doubling of its volume. An inflated tire takes up more room than a flat tire. Lungs enlarge as air is absorbed into them. Lung volume reduces when you exhale.

You will investigate four parameters that quantify gases in this activity: pressure (P), volume (V), temperature (T), and moles (n) of gas.

Thus, Four commonplace items that depend on gas behavior to function effectively.

To learn more about the gas, follow the link;

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A stove needs gas to burn (I only have one off the top of my head, sorry :/)

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