35.453 (chlorine) + 10.811 (boron) = 46.264
Answer:
<u>1.364 M</u>.
Explanation:
Molarity formula: M= n/v, where n is moles of solute, and v is liters of solution.
Now, we need to convert the grams of nickel to moles and the volume of water to liters.
125mL/1000= 0.125 L.
To convert nickel grams to moles, we need to take a look at it's chemical formula, which is:
Now we count how many molecules of each element we have:
Ni= 1
N= 2
O= 6
Calculate the weight (g) of each element (the values of g/mol can be found on the periodic table and they may vary slightly between one table and the other):
Ni: (1) (58.6934)= 58.6934
N= (2) (14.007)= 28.014
O= (6) (15.999)= 95.994
Sum all the values to obtain the total weight of 1 mole of this compound:
58.6934+28.014+95.994= 129(g/mole)
Now that we know the that 129 grams equal 1 mole of nickel(II) nitrate, we can convert the 22.0 g to moles:
129g ------- 1 mole
22.0g ----- x
x= (22*1)/129= 0.1705 moles.
Now, we have all the values needed to calculate the molarity of this solution. All we have to do is substitute the values in the formula:
M= (0.1705 moles) / (0.125 L)= <u>1.364 M</u>.
Answer:
d, 40 dm3.
Explanation:
According to Avogadro's law, the mole ratio of chemicals in a reaction is equal to the ratio of volumes of chemicals reacted (for gas).
From the equation, the mole ratio of N2 : H2 : NH3 = 1 : 3 : 2, meaning 1 mole of N2 reacts completely with 3 moles of H2 to give 2 moles of NH3, the ratio of volume required is also equal to 1 : 3 : 2.
Considering both N2 and H2 have 30dm3 of volume, but 1 mole of N2 reacts completely with 3 moles of H2, so we can see H2 is limiting while N2 is in excess. Using the ratio, we can deduce that 10dm3 equals to 1 in ratio (because 3 moles ratio = 30dm3).
With that being said, all H2 has reacted, meaning there's no volume of H2 left. 2 moles of NH3 is produced, meaning the volume of NH3 produced = 10 x 2 = 20 dm3. (using the ratio again)
1 mole of N2 has reacted, meaning from the 30dm3, only 10 dm3 has reacted. This also indicate that 20 dm3 of N2 has not been reacted.
So at the end, the mixture contains 20dm3 of NH3, and 20 dm3 of unreacted N2. Hence, the answer is d, 40 dm3.
The answer is B. Fungi,Protists
Product of mixing acids and bases describes salt is a physical property.
Product of mixing acids and bases
<u>Explanation:</u>
When an acid and a base are put together, they respond to kill the corrosive and base properties, creating a salt which portrays the physical property. The physical properties of table salt will be: Salt is a white cubic gem. At the point when the salt is unadulterated it clear.
It likewise shows up in white, dim or caramel shading relying on immaculateness. It is unscented yet has a solid salty taste. Fundamental salts contain the conjugate base of a feeble corrosive, so when they break down in the water, they respond with water to yield an answer with a pH more than 7.0.
