So answer is Ncl3
covalent bond = Non metal + Non Metal
so in our all four options we just have Ncl3 which is non metal
Here is the list of metal and non metal
A variable, which is controlled or changed in a scientific experiment to examine the influences on the dependent variable is known as an independent variable. On the other hand, a dependent variable refers to the variable, which is being measured and tested in a scientific experiment.
In the given case, one is observing that how the amount of salt in a mouse food influences the water the mouse drinks. Thus, the amount of salt in the food in the given case is an independent variable, as one can determine the amount of water consumed by the mouse, by manipulating the amount of salt intake given to the mouse.
Hence, the correct answer is option B.
Cutting pepper
cutting onion
folding eggs over
cutting ham
mixing eggs(...?)
hope this helped!
Answer:
The molarity is 3.42
Explanation:
The molarity reflects the concentration of a solution and indicates the number of moles of solute per liter of solution. In other words, the molarity (M) is the number of moles of solute that are dissolved in a given volume.
The Molarity of a solution is determined by the following formula:
Molarity is expressed in units ().
To know the amount of moles of solute (NaCl) you must know its molar mass. If:
- Na: 23 g/mole
- Cl: 35.45 g/mole
the molar mass of NaCl is: 23 g/mole + 35.45 g/mole= 58.45 g/mole
Now you apply a rule of three as follows: if 58.45 g of NaCl are present in 1 mole, 10 grams of the compound in how many moles are they?
moles= 0.171
Then:
- number of moles of solute: 0.171 moles
- volume= 50 mL= 0.05 L (being 1 L=1000 mL)
Replacing in the definition of molarity:
Molarity= 3.42
<u><em>The molarity is 3.42 </em></u><u><em></em></u>
Answer:
those things that looks like cristals