Answer:
A rock is an inconsistent mixture of minerals, while mineral is "pure" and made up of a precise combination of chemicals.
Explanation:
0.250 mol/L
<em>Step 1</em>. Write the chemical equation
H2SO4 + 2NaOH → Na2SO4 + 2H2O
<em>Step 2</em>. Calculate the moles of H2SO4
Moles of H2SO4 = 12.5 mL H2SO4 × (0.500 mmol H2SO4/1 mL H2SO4)
= 6.25 mmol H2SO4
<em>Step 3</em>. Calculate the moles of NaOH
Moles of NaOH = 6.25 mmol H2SO4 × (2 mmol NaOH/(1 mmol H2SO4)
= 12.5 mmol NaOH
<em>Step 4</em>. Calculate the concentration of the NaOH
[NaOH] = moles/litres = 12.5 mmol/50.0 mL = 0.250 mol/L
Ice is constantly subliming to form a layer of water vapor
Answer:
1.Creates environmental hazards
2.Can contribute to global warming processe
3.Can pollute harmful and toxic things in the air
4.has harmful gases that can hurt the environment including the water and soil
5.A waste of space that is taking up the earth
6.full of rubbish and toxins that can effect the environment
7.can hurt humans and animals because of the toxic chemicals produced in the air
8.Make the land soil weaker because of the bad toxins and chemicals
Answer:
a. Sb =0.280048 g , b. Ba=4.875215 g , c. Xe=5763.631 g , d. W=238.992 g
Explanation:
number of moles = 
(a) For Sb, molar mass =121.76g/mol
number of moles =2.3*
mol
<em>mass= number of moles * molar mass</em>
mass =2.3* *121.76
mass =0.280048 g
(b) for Ba, molar mass=137.33 g/mol
number of moles =0.0355 mol
mass = 0.0355 *137.33
mas = 4.875215 g
(c) for Xe, molar mass = 131.29 g/mol
number of moles =43.9 mol
mass =43.9 *131.29
mass =5763.631 g
(d) for W, molar mass = 183.84 g/mol
number of moles = 1.3mol
mass = 1.3 *183.84
mass = 238.992 g
