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Chemistry
If 20g of water in a calorimeter increases temperature by 50C, how many joules
have been absorbed?
have been absorbed?
Chemistry
CH (g) + 2O (g) → CO (g) + 2H O(g), if 15.00 L of CH is burned with 4 2 2 2 4
excess O at 23°C and 1.05 atm, what mass of H O is produced
excess O at 23°C and 1.05 atm, what mass of H O is produced
Chemistry
The molecular weight of glucose,
C6H12O6\text{C}_6 \text H_{12} \text O_6
C
6
H
12
O
6
start text, C, end text, start subscript, 6, end subscript, start text, H, end text, start subscript, 12, end subscript, start text, O, end text, start subscript, 6, end subscript
, is
180.16 gmol180.16\,\dfrac{\text g}{\text{mol}}
180.16
mol
g
180, point, 16, start fraction, start text, g, end text, divided by, start text, m, o, l, end text, end fraction
.
How many moles of glucose are in
19.1 g19.1\,\text g
19.1g
19, point, 1, start text, g, end text
of glucose?
C6H12O6\text{C}_6 \text H_{12} \text O_6
C
6
H
12
O
6
start text, C, end text, start subscript, 6, end subscript, start text, H, end text, start subscript, 12, end subscript, start text, O, end text, start subscript, 6, end subscript
, is
180.16 gmol180.16\,\dfrac{\text g}{\text{mol}}
180.16
mol
g
180, point, 16, start fraction, start text, g, end text, divided by, start text, m, o, l, end text, end fraction
.
How many moles of glucose are in
19.1 g19.1\,\text g
19.1g
19, point, 1, start text, g, end text
of glucose?
Chemistry
A balloon is filled with 10 L of air at a pressure of 5 atm. What is the pressure of the balloon if the volume is changed to 20 L?
Chemistry
1.How many moles of molecules are there in
a)35.5g of chlorine molecules
b)160gof bromine molecules
2.Find the relative atomic mass of Y (L=6.0×10²³) particles per mole.An atom of a certain element Y has mass of 6.5×10²³g
how many molecules are there in
a)0.5moles of oxygen
b)0.15moles of chlorine molecules
c)2moles of nitrogen molecules
4.calc the no of molecules in a)16g of oxygen molecules
b)240g of bromine molecules
c)0.1g of hydrogen molecules
d)106g of chlorine molecules
a)35.5g of chlorine molecules
b)160gof bromine molecules
2.Find the relative atomic mass of Y (L=6.0×10²³) particles per mole.An atom of a certain element Y has mass of 6.5×10²³g
how many molecules are there in
a)0.5moles of oxygen
b)0.15moles of chlorine molecules
c)2moles of nitrogen molecules
4.calc the no of molecules in a)16g of oxygen molecules
b)240g of bromine molecules
c)0.1g of hydrogen molecules
d)106g of chlorine molecules
Chemistry
When a 2:1 mixture of SO2 and O2 at a total initial pressure of 5 atm is passed over a catalyst at 425 degrees Celsius the partial pressure of SO3 at equilibrium is found to be 3 atm. Calculate Kp.
Chemistry
In the following equation, what will happen to the concentration of H2SO3 if extra MgSO3 is added? MgSO3(s) + H2O (l)àH2SO3 (aq) + MgO (aq)
Chemistry
A glass box holds equal amounts of hydrogen, nitrogen, oxygen, and bromine. The gases are allowed to exit the container through a tiny hole. Which gas will exit the hole the fastest?
Chemistry
Solid barium and oxygen gas react to produce solid barium oxide.
Chemistry
How much heat is lost when a 56g glass of 80 °C water cools down to 0 °C.
