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sergij07 [2.7K]
3 years ago
10

Neil Bohr's model of the atom suggested that electrons are found in distinct paths. Question 11 options: True False

Chemistry
1 answer:
creativ13 [48]3 years ago
8 0

Answer:

true

Explanation:

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Hard water often contains dissolved Ca2+ and Mg2+ ions. One way to soften water is to add phosphates. The phosphate ion forms in
katrin2010 [14]

Answer:

22.4269 grams of sodium phosphate must be added to 1.4 L of this solution to completely eliminate the hard water ions

Explanation:

We will first write the balanced equation for this scenario

3 CaCl2 + 2 Na3PO4 ----> 6 NaCl + Ca3 (PO4)2

3 Mg(NO3)2 + 2 Na3PO4 -----> 6 NaNO3 + Mg3 (PO4)2

The ratio here for both calcium chloride and magnesium nitrate is 3:2

The number of moles of each compound is equal to

0.054 * 1.4 = 0.0756\\0.093* 1.4 = 0.1302

Using the mole ratio of 3:2, convert each to moles of sodium phosphate.

0.0756 mole of CaCl2 is equal to 0.05\\ Na3PO4

0.1302 mole of CaCl2 is equal to 0.0868 Na3PO4

Converting moles of sodium phosphate to grams of sodium phosphate we get

(0.05 +0.0868) * 163.94 g/mol

22.4269 grams of sodium phosphate must be added to 1.4 L of this solution to completely eliminate the hard water ions

8 0
3 years ago
Which type of wave is a sound wave?
Vesna [10]

Answer:

longitudinal wave

Explanation:

hope it helps you and Mark me down as brainlist

3 0
3 years ago
How does botulinum toxin block synaptic transmission?
mart [117]

It blocks ACh release so the muscle cannot contract

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Which organism has a nerve net? A fish B hydra C flatworm D sponge
pentagon [3]
The answer is B hydra
5 0
3 years ago
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What is the correct name for SiCl5?
lyudmila [28]

Answer:

SbCl5

Antimony pentachloride

Antimony pentachloride is a chemical compound with the formula SbCl5.

- wikipedia

7 0
3 years ago
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