Density=mass/volume
Data:
mass=890 g
volume=100 cm³
Density=890 g/100 cm³=8.9 g/cm³
answer: the density of the copper is 8.9 g/cm³
Answer:
b. Disulfide bond
Explanation:
Covalent linkage or bonding is a type of bond in which electrons are shared between atoms in a compound or molecule. Each atom contributes to the shared electron.
This is the case of disulfide bonding i.e. S-S, in which two thiol groups (-SH) share electrons with one another. The process of oxidation between two cysteine (amino acid) molecules forms this bond. Hence, Disulfide bond is characterized by a covalent linkage.
Answer:
6.3 atm
Explanation:
P2=T2P1/T1
Change C to K
We can check this by knowing that P and T at constant V have a proportional relationship; Hence, this is correct.
1.regulating ph
2.heating
3.adding some oppositely charged colloids
Answer:

Explanation:
a) 400.0 mL of 0.10 M NaCl
(i) Moles of NaCl

(ii) Moles of ions
NaCl(s) ⟶ Na⁺(aq) + Cl⁻(aq)
We get 2 mol of ions from 1 mol of NaCl

b) 300.0 mL of 0.10 M CaCl₂
(i) Moles of CaCl₂

(ii) Moles of ions
CaCl₂(s) ⟶ Ca²⁺(aq) + 2Cl⁻(aq)
We get 3 mol of ions from 1 mol of CaCl₂

c) 200.0 mL of 0.10 M FeCl₃
(i) Moles of FeCl₃

(ii) Moles of ions
FeCl₂(s) ⟶Fe³⁺(aq) + 3Cl⁻(aq)
We get 4 mol of ions from 1 mol of FeCl₃

d) 200.0 mL of 0.10 M KBr
(i) Moles of KBr

(ii) Moles of ions
KBr(s) ⟶ K⁺(aq) + Br⁻
We get 2 mol of ions from 1 mol of KBr
