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nata0808 [166]
3 years ago
13

What’s the correct answer

Chemistry
1 answer:
butalik [34]3 years ago
3 0
He ^ 2+

Helium has two electrons the 2+ means that it has lost its two electrons leaving it with none.
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Five hundred (500) milliliters of sodium chloride 0.9% is prescribed to be given over 4 hours using a volumetric pump. What's th
Angelina_Jolie [31]

<u>Given:</u>

Volume of 0.9% NaCl = 500 ml

Time (t) = 4 hrs

<u>To determine:</u>

The infusion rate of NaCl in ml/hr

<u>Explanation:</u>

Based on the information- 500 ml of NaCl is to be given over a time span of 4 hrs

Hence, the volume of NaCl to be administered per hr is:-

= 1 hr * 500 ml/4 hr = 125 ml

Ans: Infusion rate = 125 ml/hr

6 0
4 years ago
Select the correct answer.
Zarrin [17]

Answer:

C.

Explanation:

A. C - 6 electrons - 1s2 2s2 2p2

B. O - 8 electrons - 1s2 2s2 2p4

C. N - 7 electrons - 1s2 2s2 2p3

D. Be - 4 electrons - 1s2 2s2

4 0
3 years ago
A property is a characteristic of a substance that can be observed and does not change the identity of the substance. T/F
Murljashka [212]
The correct answer is false. The statement given does not describe a property in general. However, it speaks of a specific type of property which is the physical property.  This property is the one that does not change the identity of a substance. A property can also be a chemical property where the identity of a substance is changed.
4 0
3 years ago
For an aqueous solution of sucrose (C12H22O11), determine: (a) the molarity of 3.30 L of a solution that contains 225.0 g of suc
dusya [7]

Answer:

a) Molarity = 0.199M

b) 21.6L of solution

c) 0.199 moles of sucrose in 1L

Explanation:

a) Molarity is the ratio of moles of solute (sucrose) in volume of solution (3.30L):

<em>Moles sucrose -Molar mass: 342,3g/mol-:</em>

225.0g * (1mol / 342,2965g) = 0.6573 moles

Molarity = 0.6573 moles / 3.30L

<h3>Molarity = 0.199M</h3><h3 />

b) 0.199M means 0.199 moles in 1L. 4.30 moles are in:

4.30 mol * (1L / 0.199mol) = 21.6L of solution

c) By definition, there are 0.199 moles of sucrose in 1L. This is the meaning of 0.199M

8 0
3 years ago
Exam number: 007170RR
AleksandrR [38]

Answer:

A open

Explanation:

I am not sure but i think it is!

5 0
3 years ago
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