Answer:
The answer is the third one which is 24 (glucose)
Answer:
2x1000 = 2000
Explanation:
10^3 = 10×10×10 = 1000
exponent , the ^3 means multiply the number by itself 3 times, if it was ^4, it would be 4 times and so forth.
another trick for 10s is just put the 1 and the exponents number of 0's after the 1. so in this case, put three 0's: 1,000
Answer:
Coal mining can compromised a lot of our resources one of it is the soil. It is because it eliminates the nutrients of the soil that can affect the vegetation, it destroys the wildlife and habitat. Also, it changes permanently the topography of the area mined.
Explanation:
edge 2020 just did it
Step 1
Molarity is defined as Moles of solute (NH3) divided by the volume of the solution in L
Molarity (mol/L or M) = moles of NH3/volume of the solution (L) (1)
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Step 2
The moles of solute (NH3):
0.500 % by mass means:
0.500 g/100 g solution
Moles of NH3 are calculated as:
Mass of NH3/molar mass NH3 = 0.500 g/17.0 g/mol = 0.029 moles NH3
(molar mass NH3 = 17.0 g/mol)
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Step 2
The volume of solution:
Volume is calculated from density
Density = mass solution/volume of solution
Volume = mass of solution/density = 100 g solution/0.996 g/mL => Volume = 100.4 mL
1L = 1000 mL => V = 100.4 mL = 0.1004 L
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Step 4
From (1)
Molarity = moles of NH3/volume of the solution (L) = 0.029 moles NH3/0.1004 L = 0.289 mol/L
Answer: M = 0.289 M or mol/L
Cl2 has a molar mass of 71g/mole.
75g/71g/mole=1.06moles of cl2
2Na+Cl2→2NaCl
therefore, for every one mole of cl2 there are 2 moles of Na.
1.06*2=2.12moles of Na
every mole of Na is 22.98g
2.12moles *22.98g/mole= 48.72g Na
answer is 42.72grams
