How many moles are in 4.24kg of Na2CO3?

What happens when a solid turns straight into a gas?

LiRa [457]

Answer:

The atoms are separating, and sublimation is happening.

Explanation:

5 0

3 years ago

A 10-ft moving truck has a volume capacity of 402 cubic feet, which is equivalent to 1.138 x 10⁷ milliliters. What mass of silve

steposvetlana [31]

Answer:

The mass of silver is $1.19\times 10^{14}\ Mg$

Explanation:

Given that,

The volume of the truck is 402 cubic feet or 1.138 x 10⁷ mm.

The density of silver is 10.49 g/mL.

We need to find the mass of silver that will fit in this moving truck. Density equals mass divided by volume. So,

$d=\dfrac{m}{V}\\\\\text{where m is mass}\\\\m=d\times V\\\\m=10.49\ g/mL\times 1.138 \times 10^7\ mL\\\\m=119376200\ g$

1 gram = 10⁻⁶ Megagram

$119376200=1.19\times 10^{14}\ Mg$

Hence, the mass of silver is $1.19\times 10^{14}\ Mg$

4 0

3 years ago

Use Target Reading Skills After you read the section, reread the paragraphs that contain definitions of Key Terms. Use all of th

Ksju [112]

A_______________________

3 0

3 years ago

Based on the passage, what is the structure of the product of the reaction between 8-hydroxyquinoline-5 sulfonate and HRP mcat r

dusya [7]

A because the outcome of this reaction exists a radical formed by the oxidation of an aromatic amine's or phenol's ring substituent. The hydroxyl group of a phenol serves as the ring substituent in this condition.

<h3>Which two enzyme types are required for the two-step process of converting cytosine to 5 hmC?</h3>

The methyl group exists moved to cytosine in the first step, and it exists then hydroxylated in the second stage.
Thus, a transferase and an oxidoreductase exist as the two groups of enzymes needed.

<h3>Which kind of interaction between proteins and the dextran column material is most likely to take place?</h3>

Hydrogen bonding because the glucose's OH would create an H-bond with any disclosed polar side chains on a protein surface.

<h3>Two out of the four proteins would adhere to a cation-exchange column at what buffer pH?</h3>

Only positively charged proteins can attach to a cation-exchange column, and this can only occur when the pH exists lower than the pI.
Proteins A and B would both be positively charged at pH 7.0.

To learn more about hydroxyquinoline refer to:

brainly.com/question/26102339

#SPJ4

4 0

2 years ago

Many hospitals use radioisotopes for diagnosis and treatment or in palliative care. Three radioisotopes used in medicine are giv

ehidna [41]

The question is incomplete, here is the complete question:

Many hospitals use radioisotopes for diagnosis and treatment, or in palliative care (relief of symptoms such as pain). Some radioisotopes used in medicine are listed below. Write the isotope symbol for each radioisotope. Replace the question marks with the proper integers. Replace the letter X with the proper element symbol.

a) Iodine-131:

b) Iridium-192:

c) Samarium-153:

<u>Answer:</u>

<u>For a:</u> The isotopic representation of the given isotope is: $_{53}^{131}\textrm{I}$

<u>For b:</u> The isotopic representation of the given isotope is: $_{77}^{192}\textrm{Ir}$

<u>For c:</u> The isotopic representation of the given isotope is: $_{62}^{153}\textrm{Sm}$

<u>Explanation:</u>

The isotopic representation of an atom is: $_Z^A\textrm{X}$

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

For the given options:

<u>Option a:</u> Iodine-131

The atomic number of iodine is 53 and the atomic mass of the given isotope is 131. The chemical symbol for iodine element is 'I'

Hence, the isotopic representation of the given isotope is: $_{53}^{131}\textrm{I}$

<u>Option b:</u> Iridium-192

The atomic number of iridium is 77 and the atomic mass of the given isotope is 192. The chemical symbol for iridium element is 'Ir'

Hence, the isotopic representation of the given isotope is: $_{77}^{192}\textrm{Ir}$

<u>Option c:</u> Samarium-153

The atomic number of samarium is 62 and the atomic mass of the given isotope is 153. The chemical symbol for iridium element is 'Sm'

Hence, the isotopic representation of the given isotope is: $_{62}^{153}\textrm{Sm}$

6 0

3 years ago