题干

某兴趣小组在实验室发现一瓶敞口久置的氢氧化钠和一瓶未标浓度的稀盐酸,为测定氢氧化钠的变质情况和稀盐酸的浓度,他们取9.3g变质的氢氧化钠样品于锥形瓶中,加入50g水,充分溶解,再向锥形瓶中滴加未知浓度的稀盐酸,实验测得加入稀盐酸的质量与锥形瓶中物质的质量关系如图所示.

求:

上一题 下一题 0.0难度 选择题 更新时间:2020-02-12 04:23:20

答案(点此获取答案解析)

同类题5

阅读理解

    If you have a long holiday to spend, where can you go?

Nikoi Island, Indonesia

    Less than 85 km – but somehow a whole world away – from Singapore's shining skyline lies Nikoi Island. Surrounded by white sandy shorelines and vivid coral reefs, Nikoi's centre is hidden in rainforest, resulting in amazing biodiversity seen in its native plants, animals and bird life. Marrying traditional Indonesian craftsmanship with contemporary design, Nikoi boasts just 15 stilted(建于支柱上的)beach houses, all with breathtaking sea views, guaranteeing privacy and total escape from the daily grind.

Amanpulo, Philippines

    The only property on Pamalican Island, the luxurious Amanpulo resort offers extremely impressive accommodation, with only access to over five kilometres of clean coral sand beach. Designed to resemble indigenous Bahay Kubo homes, Amanpulo's beachside, treetop and hillside villas all feature comfortable decks with hammocks(吊床)from which to enjoy the spectacular views of the greenish-blue sea below. Fill your schedule with Amanpulo's signature aquatic adventures (including diving, windsurfing and sailing), recharge in the award-winning spa or feast upon locally caught seafood – the choice is yours.

Song Saa, Cambodia

    Song Saa's incredible ocean views, and breathtaking sunsets are a very typical example of pure paradise. Its 24 villas – each with their own sea-view private plunge pool – are designed to reflect the natural beauty of Cambodia's coastline; built from recycled wood with straw roofs and driftwood furnishings, these presences are stylish proof of Song Saa's admirable commitment to sustainability(持续)and conservation. You can choose to do as much or as little as you want here, with rainforest tours, island safaris and reef snorkelling just some of the activities on offer that showcase this spectacular destination.