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3 years ago

How many grams are KBr are needed to make a saturated solution in 100g of water at 30c

Chemistry

1 answer:

erastova [34]3 years ago

5 0

Explanation:

To calculate that you need to know the value of the Kps (constant of solubility) at 30°C of KBr in water.

When the product of the concentrations of both ions (Br- and K+) equals the Kps, the solution is saturated.

Given the disociation of the salt in water:

$KBr \longrightarrow K^+ + Br^-$

The concentration of both ions are equal (1:1 ratio) and the same as the concentration of KBr added.

The Kps:

$Kps=[K^+][Br^-]$

$[KBr]=(Kps)^{1/2}$

[KBr] are moles of the salt per litre of water

Assuming a density of water of 1 g/cm3, 100 g are 0.1 litre

To calculate the mass:

$m=[KBr]*M*0.1 litre$

where M is the molecular weight of the salt.

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Write the step by step process of digestion in ruminants using 4 square method.

Vaselesa [24]

The digestion process in Ruminants begins by chewing and swallowing their food.

<h3>What are ruminants?</h3>

A ruminant is any herbivorous animal that has a stomach with four compartments, which are tasked with acquiring nutrients from plant-based food by fermenting it prior to digestion.

The digestion process in Ruminants begins by chewing and swallowing their food. Ruminants do not completely chew the food they eat, but just consume or gulp as much they can and then swallow the food. This is actually an adaptation by which these animals have evolved to spend as little time as possible feeding so that they are not hunted down by any predators while they are eating.

As mentioned earlier, the stomach of these Ruminants is divided into 4 chambers – rumen, reticulum, omasum, and the abomasum.

The process of digestion begins with the first two chambers of the stomach, the rumen and reticulum by softening the ingested matter. Later the microbes present in the rumen produces the cellulase enzymes required to digest the cellulose.

Once the plant fibres have been broken down to provide vitamins, proteins, and other organic acids, the nutrients are absorbed into the animal’s bloodstream.

Coarse plants are sent further into the next chamber for further digestion. Here is where the further bacterial action takes place and the food is formed into soft chunks called the cud.

This cud produced is regurgitated back into the animal’s mouth where it can be chewed again. The saliva of the cow greatly aids in digesting the cud.

After chewing, the food bypasses the two chambers of the stomach and directly enters the third chamber. The walls of the third chamber mash and compact the food molecules further, and then pass it to the fourth chamber – the abomasum.

The final digestion in the stomach is carried by the abomasum and then passed to the intestine.

Learn more about the ruminants here:

brainly.com/question/26752412

#SPJ1

3 0

2 years ago

Help help help help help

givi [52]

Answer:

D. Up-Down

Explanation:

Hoped this helped you <\3

6 0

4 years ago

An unknown compound, B, has the molecular formula C7H12. On catalytic hydrogenation 1 mol of B absorbs 2 mol of hydrogen and yie

Ne4ueva [31]

Answer:

5-methylhex-1-yne//5-methylhex-2-yne//2-methylhex-3-yne

Explanation:

We have to start with the information on the IR spectrum. The signal at 3300 is due to a C-H bend sp carbon and the signal in 2200 is due to the stretch carbon-carbon. Therefore we will have an alkyne. Now if we have 2-methylhexane as the product of hydrogenation we have several options to put the triple bond. Between carbons 1 and 2 (5-methylhex-1-yne), between carbons 2 and 3 (5-methylhex-2-yne) and between carbons 3 and 4 (2-methylhex-3-yne). On carbon 5 we have a tertiary carbon therefore we dont have any other options.

See figure 1

I hope it helps!

3 0

4 years ago

Which statement best describes a weak acid?

morpeh [17]

C. Weak acids partially ionize

3 0

4 years ago

What is the molarity of a solution that contains 0.0345 mol nh4cl in exactly 400 ml of solution?

alexdok [17]

The molarity of a solution is the number of moles of a substance per liter of the solution.
400 mL becomes 0.400 liters
You have 0.0345 moles of ammonium chloride NH4Cl, so take the number of moles over the number of liters to find the answer.
0.0345 moles/0.400 liters = 0.0863 moles/liter
0.0863M = molarity of the solution

4 0

4 years ago