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MArishka [77]
3 years ago
7

To how many significant figures can you report your measurement of the mass the nacl sample?

Chemistry
1 answer:
aleksklad [387]3 years ago
5 0

<span>Sodium chloride, NaCl, sample are usually used in many laboratory testings and experiments. The mass required for samples are usually just below 10 g. The most accurate readings for this mass is through which there are 2 decimal places. Thus, the highest number of significant  figures that can be reported for such is only 4. </span>

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Question 9 (1 point)
pantera1 [17]

Answer:

8 moles of C

Explanation:

From the question given above, the following equation was obtained:

3A + 2B —> 6C

From the equation above,

3 moles of A reacted to produce 6 moles of C.

Thus, the number of mole of C produced by reacting 4 moles of A can be obtained as follow:

From the equation above,

3 moles of A reacted to produce 6 moles of C.

Therefore, 4 moles of C will react to produce = (4 × 6)/3 = 8 moles of C

Thus, 8 moles of C can be obtained from the reaction of 4 moles of A with excess B

6 0
3 years ago
What is the symbol of the ion with 36 electrons and a +2 charge?
AlladinOne [14]

Answer:

Strontium

Explanation:

The atomic number of strontium is 38.

It has 38 electrons.

It is alkaline earth metal. It has two valance electrons.

Strontium loses its two electrons and form cation with +2 charge.

Electronic configuration;

Sr₃₈ = [Kr] 5s²

The valance electrons present in 5s are lost by strontium atom and form Sr⁺² cation.

it is yellowish-white metal.

It is highly reactive.

It form salt with halogens.e.g

Sr    +   Br₂    →     SrBr₂

IT react with oxygen and form oxide.

2Sr   +   O₂   →    2SrO

this oxide form hydroxide when react with water,

SrO  + H₂O   →  Sr(OH)₂

With nitrogen it produced nitride,

3Sr + N₂     →  Sr₃N₂

With acid like HCl,

Sr + 2HCl  →  SrCl₂ + H₂

3 0
3 years ago
You are confronted by a phosphorus atom. this atom has 15 protons and 17 neutrons. how many electrons does it have
bogdanovich [222]
15 electrons if it is not an ion

8 0
3 years ago
Read 2 more answers
Salt is a type of _______ solid, which means that it will _______ when placed in water. A. soluble, float B. soluble, dissolve C
Allisa [31]
A, because a soluble dissolves in water
5 0
3 years ago
Read 2 more answers
Are pure substances homogeneous or heterogeneous
Svetllana [295]

The answer is homogenous i think

6 0
2 years ago
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