Mass number is the sum of protons and neutrons.
Atomic number is the total number of protons present.
Mass number = protons + neutrons
Atomic number = protons present.
From the above equations we can conclude that,
Atomic number= Mass number- neutrons.
Thus we can find out the atomic number by subtracting the number of neutrons from the mass number.
Answer:
About 547 grams.
Explanation:
We want to determine the mass of copper (II) bicarbonate produced when a reaction produces 2.95 moles of copper (II) bicarbonate.
To do so, we can use the initial value and convert it to grams using the molar mass.
Find the molar mass of copper (II) bicarbonate by summing the molar mass of each individual atom:
![\displaystyle \begin{aligned} \text{MM}_\text{Cu(HCO$_3$)$_2$} &= (63.55 + 2(1.01)+2(12.01)+6(16.00))\text{ g/mol} \\ \\ &=185.59\text{ g/mol} \end{aligned}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cbegin%7Baligned%7D%20%5Ctext%7BMM%7D_%5Ctext%7BCu%28HCO%24_3%24%29%24_2%24%7D%20%26%3D%20%2863.55%20%2B%202%281.01%29%2B2%2812.01%29%2B6%2816.00%29%29%5Ctext%7B%20g%2Fmol%7D%20%5C%5C%20%5C%5C%20%20%26%3D185.59%5Ctext%7B%20g%2Fmol%7D%20%5Cend%7Baligned%7D)
Dimensional Analysis:
![\displaystyle 2.95\text{ mol Cu(HCO$_3$)$_2$}\cdot \frac{185.59 \text{ g Cu(HCO$_3$)$_2$}}{1 \text{ mol Cu(HCO$_3$)$_2$}} \Rightarrow 547 \text{ g Cu(HCO$_3$)$_2$ }](https://tex.z-dn.net/?f=%5Cdisplaystyle%202.95%5Ctext%7B%20mol%20Cu%28HCO%24_3%24%29%24_2%24%7D%5Ccdot%20%5Cfrac%7B185.59%20%5Ctext%7B%20g%20Cu%28HCO%24_3%24%29%24_2%24%7D%7D%7B1%20%5Ctext%7B%20mol%20Cu%28HCO%24_3%24%29%24_2%24%7D%7D%20%5CRightarrow%20547%20%5Ctext%7B%20g%20Cu%28HCO%24_3%24%29%24_2%24%20%7D)
In conclusion, about 547 grams of copper (II) bicarbonate is produced.
Molar mass is the ratio of the mass to that amount of the substance. The mass of the barium nitrate in the formula unit is 23.0 grams.
<h3>What is mass?</h3>
The mass of a substance is the product of the molar mass of the compound and the number of moles of the compound.
Given,
Molar mass of barium nitrate = 261.35 g/mol
If,
have a mass of 261.35 g/mol then,
formula units will have a mass of,
![\begin{aligned}& = \dfrac{261.35 \times 5.30 \times 10^{22}}{6.022\times 10^{23}}\\\\&= 23.0\;\rm gm\end{aligned}](https://tex.z-dn.net/?f=%5Cbegin%7Baligned%7D%26%20%3D%20%5Cdfrac%7B261.35%20%5Ctimes%205.30%20%5Ctimes%2010%5E%7B22%7D%7D%7B6.022%5Ctimes%2010%5E%7B23%7D%7D%5C%5C%5C%5C%26%3D%2023.0%5C%3B%5Crm%20gm%5Cend%7Baligned%7D)
Therefore, option C. 23.0 gm is the mass of barium nitrate.
Learn more about mass here:
brainly.com/question/24958554
The formation of aspirin will proceed faster if acetic anhydride is used in place of acetic acid.
However, acetic anhydride will hydrolyze in the presence of water to form acetic acid, slowing down the reaction.
Answer:
density=1.43 g/L
Explanation:
Since the density formula is density = mass / volume, we need to find out the mass of the gas and the volume is that of the container.
The mass of the gas is 130.0318 g-129.6375 g=0.3943 g
The gas volume is 276mL*(1L/1000mL) 0.276 L
density = mass / volume=0.3943g/0.276L
density =1.43g/L