Са+Н2=СаН2. (Н2-галоген)
Н2+S=H2S
2CuO+H2=2CuOH
H2+O2=H2O
Сульфат железа (III) - Fe₂(SO₄)₃
Mr(Fe₂(SO₄)₃) = 56 * 2 + (32 + 16 * 4) * 3 = 400 г/моль
m = M * n = 400 г/моль * 2.5 моль = 1000 г = 1 кг
Ответ: 1 кг
1)
дано
m(P2O5)=20 g
---------------------
m(O2)-?
V(O2)-?
1) находим массу кислорода
Х г 20 г
4P+5O2-->2P2O5 M(O2)=32 g/mol ,M(P2O5)=142g/mol
5*32 2*142
X/160 = 20/284
X=11.27 g
2) находим обьем кислорода
X 20
4P+5O2-->2P2O5 V(O2)=22.4L/mol ,M(P2O5)=142g/mol
5*22.4 2*142
X/112 = 20/284
X=7.9 L
ответ 11.27 г, 7.9 л
2)
дано
m(S)=20 g
-----------------
m(SO2)-?
20 X g
S+O2-->SO2 M(S)=32 g/mol , M(SO2)=64 g/mol
32 64
20/32 = X/64
X=40 g
ответ 40 г
Ответ:
1) деформация
2) плавление, испарение, кристаллизация
А) Mg + 2HBr = <span>H2</span> + <span>MgBr2</span>BAO<span> + </span>2<span>HNO3</span><span> = </span><span>BA(NO3)2</span><span> + </span><span>H2O
</span>2NaOH<span> + </span><span>H2S</span><span> = </span><span>Na2S</span><span> + </span>2<span>H2O</span>
б) 2<span>Li2O</span> + 7<span>H2SO4</span> = 4<span>LiO4</span> + 7<span>SO2</span> + 7<span>H<span>2
</span></span>Fe(OH)2<span>+ </span>2<span>HNO3</span><span> = </span><span>Fe(NO3)2</span><span> + </span>2<span>H2O
</span>3<span>K2SiO3</span><span> + </span>2<span>H3PO4</span><span> = </span>2<span>K3PO4</span><span> + </span>3<span>H2SiO<span>3</span></span>