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dlinn [17]
3 years ago
10

a. The atomic mass defines the elemental identity of an atom. b. The atomic number of an element is approximately equal to the n

umber of protons in an atom of that element. c. Helium is the smallest atom and has an atomic number of 1. d. Isotopes of the same element have the same atomic mass.
Chemistry
1 answer:
olga nikolaevna [1]3 years ago
3 0

B

Explanation:

option b is correct because

hydrogen is smallest atom

isotopes of elements have different atomic mass

atom mass have nothing to do with elemental identity

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Using balanced chemical equations, explain the observed conductivity at the point of faint pink indicator color for:
ArbitrLikvidat [17]

Answer:

This is required answer.

Explanation:

Given that:

1. by addition the ammonia to acetic acid

using balanced chemical equation:

ammonium acetate:

The balanced equation is:

NH₃ + H₂O ===> NH₄OH

when ammonia gas dissolves in water then we get the base in form of ammonium hydroxide.

When  NH₄OH reacts with CH₃COOH then we get ammonium acetate and water

NH₄OH + CH₃COOH ===> [CH₃COO]- & NH₄+ & H₂O

So, we can say that,

when we are adding an acid and a base together then we get the product of H₂O and given elements.

2. addition of barium hydroxide to sulfuric acid:

The balanced equation is :

H₂SO4+ Ba(OH)₂--> BaSO₄+ 2H₂O

when acid and base reacts together than we get barium sulphate and water

when sulfuric acid and barium hydroxide.

Hence, this is required answer.

5 0
4 years ago
Which formula represents a base? lioh hno2 hclo4 hcl
dybincka [34]
LiOH ( <span>Lithium hydroxide ) .

hope this helps!</span>
4 0
3 years ago
Read 2 more answers
The speed of a car is 16 meters per second. What is this speed in miles per hour? What is
Dovator [93]

<u>Conversion Factors:</u>

1.61 km = 1 mile

60 sec = 1 min

60 min = 1 hour

<u />

Use dimensional analysis to solve.

=\frac{16\ meters}{1\ second} × \frac{1\ km}{1000\ meters} × \frac{1 mile}{1.61\ km} × \frac{60\ seconds}{1\ min} × \frac{60\ min}{1\ hour}

=35.77639752

= 36 miles/hour

If done properly, you should be left with the units <em>miles/hour</em>

<em />

3 0
3 years ago
15. What are the outer electrons of an atom that have to ability to create<br> chemical bonds? *
suter [353]

Answer:

valence electron

Explanation:

mark it as brainliest and plz follow me

8 0
3 years ago
Which of the following reagents should be used to convert to Question 26 options: A) H2, Lindlar's catalyst B) Na, liquid NH3 C)
diamong [38]

Answer: The question is is not complete...here is the complete question.

Which of the following reagents should be used to convert 3-Hexyne to E-3-hexene

Option B.

Na, liquid NH3.

Explanation:

3-Hexyne to E-3-hexene can be converted with by using the reagent of Na, NH3 (birch reduction) and this can be done by hdrogenation of H2.

The reagents NaNH3 convert 3-Hexyne to E-3-hexene because it is a reducing agents that convert or has the ability to reduce alkynes to trans alkenes.

3 Hexyne is an alkynes and it is converted to E- 3 hexene Na and NH3.

3 0
3 years ago
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