Group of tissues form a cell , and a group of cells form an organ
Answer:
(NH₄)₂(SO₄)+H₂O⇒(NH₄)₂O+H₂(SO₄)
Explanation:
(NH₄)⁺(SO₄)²⁻+H₂O⇒(NH₄)⁺O²⁻+H₂(SO₄)²⁻
(NH₄)₂(SO₄)+H₂O⇒(NH₄)₂O+H₂(SO₄)
Answer:
a. release of heat flames or light - Physical Change
b. formation of precipitate - Chemical Change
c. change in substances size - Physical Change
d. change in an objects shape - Physical Change
e. change in an objects phase of matter - Physical Change
f. releasing gases/bubbles - Chemical Change
Explanation:
These are all either changes in physicality or in chemical structures; hope I helped either way!
Answer:
I) 0.0585 M
ii)6.2 g dm-3
Explanation:
The reaction equation is given as;
Na2CO3(aq) +2HCl(aq)------> 2NaCl(aq) + CO2(g) +H2O(l)
Concentration of acid CA= 0.3 M
Volume of acid VA= 3.9 cm^3
Concentration of base CB= the unknown
Volume of base VB= 10 cm^3
Number of moles of acid NA= 2
Number of moles of base NB= 1
From;
CAVA/CBVB= NA/NB
CAVANB=CBVBNA
CB= CAVANB/VBNA
substituting values;
CB= 0.3 × 3.9 × 1/ 10.0 × 2
CB= 0.0585 M
ii) mass concentration= molar concentration × molar mass
Molar mass of Na2CO3= 106 gmol-1
Mass concentration= 0.0585 × 106 = 6.2 g dm-3
