Determine the fraction of an original sample of tritium that remains unchanged after 24.62 years.

5 Examples of simple salts

kolbaska11 [484]

<h3>Five Examples of Salts </h3>

Sodium Chloride.
Sodium chloride (NaCl) is the most common type of salt in our lives.
Potassium Dichromate. •
Potassium dichromate (K2Cr2O7) is an orange-colored salt composed of potassium, chromium and oxygen.
Calcium Chloride.
Sodium Bisulfate.
Copper Sulfate.

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2 years ago

Plssssssssssssssssssmejepleplele

Leona [35]

Answer:

Yes the two of the answer is True

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3 years ago

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What volumes of 0.200 M HCOOH and 2.00 M NaOH would make 500. mL of a buffer with the same pH as one made from 475 mL of 0.200 M

Fed [463]

36 ml of NaOh and 464 ml of HCOOH would be enough to form 500 ml of a buffer with the same pH as the buffer made with benzoic acid and NaOH.

What is benzoic acid found in?

Some natural sources of benzoic acid include: Fruits: Apricots, prunes, berries, cranberries, peaches, kiwi, bananas, watermelon, pineapple, oranges.
Spices: Cinnamon, cloves, allspice, cayenne pepper, mustard seeds, thyme, turmeric, coriander.

Calculate the amount of moles in NaOH and benzoic acid. This calculation is done by multiplying molarity by volume.

Amount of moles of NaOH -2 × 0.025 = 0.05 mol

Amount of moles of benzoic acid 2 × 0.475 = 0.095 mol

In this case, we can calculate the pH produced by the buffer of these two reagents, as follows

$pH = pKa + log\frac{base}{acid}$

$4.2 + log\frac{0.05}{0.045} = 4.245$

We must repeat this calculation, with the values shown for HCOOH and NaOH. In this case, we can calculate as follows

$pH = pKa + log\frac{base}{acid}$

$4.245 = 3.75 + log\frac{base}{acid}$

$log\frac{base}{acid} = 0.5$

$\frac{base}{acid} = 3.162$

Now we must solve the equation above. This will be done using the following values

$\frac{2(0.5 - x)}{0.2x - 2(0.5 - x)} = 0.464 L$

With these values, we can calculate the volumes of NaOH and HCOOH needed to make the buffer.

NaOH volume

( 0.5 - 0.464)L

0.036L .................... 36ml

HCOOH volume

500 - 36 = 464mL

Learn more about benzoic acid

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3 0

2 years ago

Which organisms in this food web are carnivores? Select the two correct

LUCKY_DIMON [66]

The two correct options are Poison dart frog and Boa constrictor. Both these organisms are pure carnivores which are also known as pure meat eaters in the food web. Carnivores are organisms in the food chain that only meat-eaters and never take any type of vegetation in their diet.

Explanation:

A Poison dart frog purely survives on meat (meat- eater).
Long sticky tongues are used to catch their prey such as ants, flies, insects.
Since they produce high toxin levels, it has very few predators in the wild.
Boa constrictor is also an organism that eats only meat.
While they are young they eat prey like rats, squirrels and mice.
The type of attack used by a boa constrictor is an ambush attack type. It attacks its preys using the surprise factor.

6 0

4 years ago

How many grams are in 4 moles of Calcium?

mixer [17]

Answer:

160.32 grams of Ca or 160 if rounded

Explanation:

Multiply moles of Ca by the conversion factor (molar mass of calcium) 40.08 g Ca/ 1 mol Ca, which then allows the cancelation of moles, leaving grams of Ca.

4 mol*40.08g/mol = 160.32 grams of Ca

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3 years ago

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