Identify the element below

Answer: 130g  , 40g ,  70g

Explanation:

Answer: To solve this question, we need to use the Avogadro's Number, which is a constant first discovered by Amadeo Avogadro, an Italian scientist. He discovered that in a mole of a substance, there are 6,02*10²³ molecules. Using this relationship, we apply the following conversion factor:

So, 8,50 * 10²⁴ molecules of Na₂SO₃ represent 14,12 moles of Na₂SO₃

Explanation:

The number of moles is equal to 14.1 moles in 8.5 × 10²⁴ molecules of Na₂SO₄.

Avogadro’s number can be demonstrated as the number of particles in one mole of any substance. Generally, these units can be ions, molecules, atoms, electrons, or protons, depending upon the reaction or reactant and product.

The value of Avogadro’s constant is calculated approximately equal to 6.022 × 10²³ per mole. This number was named after the name of scientist Amedeo Avogadro.

Given, the molecules of the sodium sulfate =  8.5 × 10²⁴

One mole of sodium sulfate (Na₂SO₄) has molecules = 6.022 × 10²³

So, 6.022 × 10²³ molecules of sodium sulfate  = 1 mole

8.5 × 10²⁴molecules of Na₂SO₄ has moles =8.5 × 10²⁴/6.022 × 10²³

The number of moles of sodium sulfate = 14.2 mol

Therefore, 14.1 moles of sodium sulfate in 8.50 × 10²⁴ molecules of Na₂SO₄.

Learn more about Avogadro's number, here:

brainly.com/question/11907018

#SPJ2

Answer:

It is Sample 3, so C

Explanation:

This is because most metals would be solid but this is probualy mercury and it has a pretty low boiling point, and all the other samples are either weak/break easily with a hammer which metals dont do that, and theres a gas, obviously not so if you use process of elimation and common sense, its C

Answer:

i don't know the answer now please sorry for the day before the end of the following is Open you have a good time with the button in the top right of

Answer:

3*0.35L = 1.05L

Explanation:

For part A, we need the ratio of moles of propane to moles of oxygen to get the volume of oxygen required.

The equation tells us there are 5 moles of oxygen gas required to combust 1 mole of propane.

So the required volume of oxygen is 5*0.35L = 1.75L

The equation also tells us that 3 moles of carbon dioxide are produced from the combustion of one mole of propane.

Therefore the produced volume of carbon dioxide is 3*0.35L = 1.05L

Answer:

Option (2)

Explanation:

Boyle's states that at constant temperature, volume of a gas is inversely proportional to the pressure exerted by the gas.

In other words, at constant temperature, multiplication of pressure and volume of the gas is constant.

PV = k

Here 'k' = constant

From the graph attached,

[tex](V_3,P_3)[/tex] represents (0.5, 200).

0.5 × 200 = k

k = 100

For pressure 'P' = 150 kPa

150 × V = 100

V = [tex]\frac{100}{150}[/tex]

V = 0.67 L

Option (2) is the answer.

Answer:

2 is the right answer so be it

Answer:

Boron

Explanation:

Answer:

Boron

Explanation:

Boron is the first element of Group 13 and is the only metalloid of the group. Its chemical symbol is B, and it has an atomic number of 5. Boron has the electron configuration [He] 2s 2 2p 1 and prefers an oxidation state of +3. Boron has no natural elemental form; it forms compounds which are abundant in the Earth's crust.

Answer:

It's a metaphor. It's comparing Jordan and their emotions to a tornado

Answer:

d. Because those chemicals are easily made when CO2 reacts with water, forming H2CO3 (via carbonic anhydrase

The pairs of substances form a buffer system for human blood is carbonic acid (H₂CO₃) and bicarbonate anion (HCO₃⁻)  , Option D

A buffer is a  combination of a weak acid (or base) and a salt that contains the conjugate of that weak acid or base.

A buffer solution is added to maintain the pH of any solution

The buffer  of carbonic acid (H₂CO₃) and bicarbonate anion (HCO₃⁻)  is used to maintain the balance of acid and base in the body.

It is used to maintain the pH level of the body between 7.35 and 7.45 , as the pH level higher than 7.8 and lower than 6.8 can lead to death.

Therefore the pairs of substances form a buffer system for human blood is carbonic acid (H₂CO₃) and bicarbonate anion (HCO₃⁻)  , Option D

To know more about Buffer Solution

https://brainly.com/question/24262133

#SPJ2

Answer:

50distance and 10minutes time

Explanation:

because it's the best object

Answer:

52- the 30 he has already = $22

22/5= 4.4

he will have to babysit 5 times

Zinc (Zn) has less than 34 protons, 30 to be exact, and is a transition metal in Group 12. Note: it is also called a "post-transition metal."

Answer:

it's a combination of the fact that Chinese culture rose out of two of its major rivers,yellow and yangzi. these rivers provide fertile soils conducive to farming .

Explanation:

later on , near the turn of 19th century population migrated to the coastal cities

Answer

the land is too fertile for people to grow crops

Explanation:

...

Answer:

Explanation:    

Answer:

See Explanation

Explanation:

A decreasing temperature indicates that the dissolution process for the ammonium chloride requires input of energy from surroundings. That is, the process is essentially 2 parts => system (object of interest - NH₄Cl) and the surroundings (everything else - solvent - H₂O). The surroundings (water) solvent is showing a measured decrease in temperature or loss of energy (exothermic to surroundings) which flows into the system (NH₄Cl) and effects dissolution of salt into solution (endothermic to system).

Answer:

B. Calculate the mass of iron produced from the reaction

Explanation:

Sana makatulong mark me as a brainliest

Answer:

vapor pressure, atmospheric pressure

Explanation:

the boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it.

(I'm not too sure if this is right but I think it is)

Answer:

Explanation:

are you doing your mid term?well i got c

Answer:

D

Explanation:

Compounds 1 and 3 are lonic.Because ionic compounds are composed of oppositely charged ions that are attracted to one another,

they require more energy to melt than covalent bonds. just usign he process of elimination you get rid of A and B becuase covalant compound contaIN same negatively charged particles that contain requrie less energy to melt and since two and four have low melting point its d

Answer:

A

Explanation:

True igneous rock forms cooling of magma fast on the top

Answer:

The answer is A. True

Explanation:

Answer:

An example of heatwaves showing physical and chemical change is with a burning candle, when a candle burns, there is both a physical and chemical reaction.

The physical change is quite obvious and in fact, it can be seen. When the candle burns, the wax slowly melts and the candle gets smaller and smaller. This wax, as can be seen, will drip onto the candle and stick to it. When this wax forms back into a solid and stays on the candle, that is another physical change that can occur.

The chemical reaction can be a little less obvious. The first is that the heat produced by the candle consumes both the oxygen around it, as well as the fuels coming from the flame. This will then lead to carbon dioxide emissions produced by the flame, which by the way should never be inhaled. This is the chemical change that takes place in the reaction.

Answer:

7:4

Explanation:

The coefficients of a balanced chemical equation give us the mole ratios. The coefficient of carbon dioxide here is 4 and oygen is 7.