Answer:
1) There are 0.0128 moles of BBr3 present in 3.20 grams of this compound
2) There are 909.35 grams of BBr3 present in 3.63 moles of this compound
Explanation:
<u>Step 1: </u>Given data
Boron tribromide = BBr3
Molar mass of Boron = 10.81 g/mole
Molar mass of Bromide = 79.9 g/mole
Molar mass of Boron tribromide = 10.81 + 3*79.9 = 250.51 g/mole
<u>Step 2:</u> Calculating number of moles
Number of moles = mass / molar mass
Number of moles of BBr3 = 3.20 grams / 250.51 g/mole
Number of moles of BBr3 = 0.0128 moles
<u>Step 3:</u> Calculating mass
If we have 3.63 moles of boron tribromide (= BBr3)
Mass of BBr3 = number of moles of BBr3 * Molar mass of BBr3
Mass of BBr3 = 3.63 moles * 250.51 g/mole
Mass of BBr3 = 909.35 grams
To be floating, the gravity force of the iceberg should be same as the buoyancy force that result from the difference of the ice and water density.
The density of ice is 920 and water is 1030, then the difference should be: 1030kg/m3-920kg/m3= 110kg/m3
Let say that the volume of ice below the water is volume1 and the volume above the water(exposed volume) is volume2.
You can get this equation
volume1+volume2= 100%
volume1= 100%- volume2
Insert it into the buoyancy and gravity force will result
buoyancy=gravity
110kg/m3*volume1= 920kg/m3 *volume2
110kg/m3*(100%- volume2)= 920kg/m3 *volume2
110kg/m3 - 110kg/m3*volume2= 920kg/m3 *volume2
110kg/m3 = 1030kg/m3 *volume2
volume2= 110/1030= 0.1067= 10.7%
Answer:
the heat capacity of steam is 2.01 J/(g⋅∘C) and of ice is 2.09 J/(g⋅∘C). 1. See answer.
The immediate product of neutron absorption by Ag-107 is silver atom with a mass of 108, Ag-108.
<h3>What is radioactivity?</h3>
Radioactivity is the spontaneous emission of radiation as wall as particles and energy l by the nucleus of elements due to their disintegration.
The radioactive particles that are usually emitted include:
- alpha particles
- beta particles and
- neutrons
The neutron has a mass of 1.
When silver isotope having a mass of 107 absorbs a neutron, the silver isotope produces will have a mass of 108, Ag-108.
Learn more about radioactivity at: brainly.com/question/25750315
Answer:
Nucleotides have a phosphate group attached at the 5' carbon atom of the sugar.
Explanation:
Phosphate group is attached to the sugar molecule in the place of -OH.
