Đáp án:
Giải thích các bước giải:
Thời gian người đó đi hết quãng đường AB là:
10 giờ 45 phút - 6 giờ - 30 phút = 4 giờ 45 phút
Đổi 4 giờ 45 phút = 4,75 giờ
Độ dài quãng đường AB là:
48 × 4,75 = 228 ( km )
Đáp số: 228 km
Thời gian để ô tô đi từ $A$ đến $B$ không kể thời gian nghỉ là:
$10$ giờ $45$ phút - $6$ giờ - $30$ phút = $4$ giờ $15$ phút
= $4,25$ giờ
Quãng đường $AB$ dài số $km$ là:
$46 \times 4,25 = 195,5$ ($km$)
Đáp số : $195,5$ $km$.
Nồng độ $PO4^{3-}$ trong dung dịch Na3PO4 0,1M là:
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