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Vanyuwa [196]
3 years ago
14

7. What do you use to hold a test tube when you are heating it?​

Chemistry
2 answers:
Cerrena [4.2K]3 years ago
8 0
Its just called a test tube holder
Misha Larkins [42]3 years ago
3 0

Answer:test tube holder

Explanation:can be used to hold while heating.

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Put the following elements into five pairs of elements that have similar chemical reactivity: F, Sr, P, Ca, O, Br, Rb, Sb, Li, S
kirill115 [55]

Explanation:

Given elements:

  F, Sr, P, Ca, O, Br, Rb, Sb, Li, S

Elements with the same chemical reactivity will belong to the same group on the periodic table. This implies that elements in the same column will have the same reactivity;

  Li and Rb are both alkali metals in group 1

  Ca and Sr are both alkali earth metals in group 2

  F and Br are halogens in group 7

  O and S are group 6 elements

 P and Sb are both in group 5 on the periodic table

So these groupings show elements with the same chemical properties.

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D, all of the above

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Leni [432]

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3 years ago
Question 11 (10 points)
andrey2020 [161]

Answer:

The correct answer is option a.

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When aluminum hydroxide reacts with of nitrous acid it gives of aluminum nitrite and of water.

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According to above reaction ,when 1 mole of aluminum hydroxide reacts with 3 moles of nitrous acid it gives 1 mole of aluminum nitrite and 3 moles of water.

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