Answer:
Molality of the solution is 0.119 mol/kg
Explanation:
Molality is the type of concentration that indicates the moles of solute in 1 kg of solvent.
As we assume water's density as 1 g/mL, we need to calculate the mass of water (our solvent).
We convert 0.535 L to mL → 0.535 L = 535 mL
By the way, water's mass is 535 g.
We convert the mass from g to kg → 535 g = 0.535kg
We need to calculate the moles of solute, NaCl.
3.71 g . 1mol / 58.45 g = 0.0635 mol
Molality = mol/kg → 0.0635 mol / 0.535kg = 0.119 m
Answer:
CuSO4.5H2O
Explanation:
Recall that;
mass of anhydrous salt/ molar mass of anhydrous salt = mass of hydrated salt/molar mass of hydrated salt
mass of anhydrous salt = 27.38 g
mass of hydrated salt = 42.75 g
molar mass of anhydrous salt = 160 g/mol
molar mass of hydrated salt = 160 + 18x
27.38 g/160 g/mol = 42.75 g/160 + 18x
27.38 (160 + 18x) =160 * 42.75
4380.8 + 492.84x = 6840
492.84x = 6840 - 4380.8
492.84x = 2459.2
x = 2459.2/492.84
x = 5
Hence the formula of the hydrate is; CuSO4.5H2O
Inches isn what you mesure a cooking pot by
2) B. Dependent Variable. This is because the rate of the algae growth depends on the other variables. 3) D 4) F 5) C 6) A 7) E 8) B
Answer:1, 2, and 4
Explanation:
covalent bonds are not ionic. the elements SHARE electrons
Which of the following are properties of compounds formed by covalent bonding (Select all that apply)
1. When you dissolve an covalent compound in water, the solution does not conduct electricity.
2. Covalent compounds often have lower melting points than ionic compounds.
3. When you dissolve an covalent compound in water, the solution conducts electricity.
4. Covalent compounds form when combining two or more nonmetal atoms.
5. Covalent compounds form when combining a two metal atoms.
6. Covalent compounds form when combining a metal atom with a nonmetal atom.
