Answer:
Mass = 206.38 g
Explanation:
Given data:
Mass of calcium chloride = 80.0 g
Mass of silver chloride formed = ?
Solution:
Chemical equation:
CaCl₂ + 2AgNO₃ → Ca(NO₃)₂ + 2AgCl
Number of moles of CaCl₂:
Number of moles = mass/molar mass
Number of moles = 80.0 g/ 110.98 g/mol
Number of moles = 0.72 mol
Now we will compare the moles of CaCl₂ and AgCl
CaCl₂ : AgCl
1 : 2
0.72 : 2/1×0.72 = 1.44 mol
Mass of silver chloride:
Mass = number of moles × molar mass
Mass = 1.44 mol × 143.32 g/mol
Mass = 206.38 g
Answer:
Atomic number
Explanation:
Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus. The Rutherford–Bohr model of the hydrogen atom (Z = 1) or a hydrogen-like ion (Z > 1).
Answer:
- The third choice: <u><em>Only temperature (degrees C) is the independent variable.</em></u>
Explanation:
The <em>independent variable</em> is generally represented on the horizontal axis.
In the graph the horizontal axis is labeled Temperature (°C), so this is the independent variable.
The <em>dependent variable</em><em> </em>is represented in the vertical axis. In the shown graph it is Flow time (s).
The independent variable is the input of the function or relation and it determines or explains the dependent variable.
So, on the given graph you can you can tell that the flow time (measured in seconds) depends on, or is determined by, the temperature (measured in °C).
The<em> slope</em> of the trend line is the measure of how much the dependent variable changes, on average, when the independent variable changes one unit. For the shown graph, the slope is change in flow time divided by the change in temperature.
The number of moles is given by:
Mass of hydrogen, = (given)
Molar mass of hydrogen, =
Number of moles of hydrogen, =
Reaction between to form is:
From the reaction it is clear that 3 moles of hydrogen gives 2 moles of ammonia and 1 mole of nitrogen gives 2 moles of ammonia .
So, of gives:
Number of moles of ammonia, =
Since, in one mole of ammonia, there are molecules of ammonia, .
So, number of molecules in of ammonia, is:
Hence, the number of molecules of ammonia produced by of is .