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1 year ago

How do I create an atom with a mass of 3 and a neutral charge?

Chemistry

1 answer:

kupik [55]1 year ago

6 0

Answer:

a lithium atom (Z=3, A=7 AMU) contains three protons (found from Z), three electrons (as the number of protons is equal to the number of electrons in an atom), and four neutrons (7 – 3 = 4).

Explanation:

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Molar mass of A1C1 3

Kamila [148]

Answer:

Gold(III) chloride

5 0

2 years ago

(b) Once the ionic solid has dissolved, the anion that is formed is able to react as a base, with water as the acid. Write the n

Marrrta [24]

Answer:

b C₂H₃O₂⁻ + H₂O ⇄ HC₂H₃O₂ + OH⁻

e HC₂H₃O₂ + H₂O ⇄ H₃O⁺ + C₂H₃O₂⁻

f ka<<1

g. Weak acid molecules and water molecules

Explanation:

The water molecule could act as a base and as an acid, a molecule that have this property is called as amphoteric.

b The salt NaC₂H₃O₂ is dissolved in water as Na⁺ and C₂H₃O₂⁻. The reaction of the anion with water is:

Where the C₂H₃O₂⁻ is the base and water is the acid.

e. The reaction of HC₂H₃O₂ (acid) with water (base), produce:

f. As the acetic acid (HC₂H₃O₂) is a week acid, the dissociation in C₂H₃O₂⁻ is not complete, that means that <em>ka<<1</em>

g. The ka for this reaction is 1,8x10⁻⁵, that means that there are more <em>weak acid molecules</em> (HC₂H₃O₂) than conjugate base ions. Also, the <em>water molecules </em>will be in higher proportion than hydronium ions.

I hope it helps!

4 0

2 years ago

A rubber ball is held 4.0 m above a concave spherical mirror with a radius of curvature of 1.5 m. At time equals zero, the ball

exis [7]

The time elapsed when the ball placed above the concave mirror and the image formed would be at the same location is 0.55 s.

<h3>Image distance</h3>

The position of the image formed is determined using the followimg mirror formula;

$\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$

where;

f is the focal length of the mirror
v is the image distance
u is the object distance

f = R/2

f = 1.5/2

f = 0.75 m

When the ball and its image is in the same position, u = v

The position of the ball is calculated as;

$\frac{1}{f} = \frac{1}{u} + \frac{1}{u} \\\\\frac{1}{f} = \frac{2}{u} \\\\u = 2f\\\\u = 2(0.75)\\\\u = 1.5 \ m$

<h3>Time of motion of the ball</h3>

The time taken for the ball to travel the caluclated distance is determined as;

h = ut + ¹/₂gt²

1.5 = 0 + ¹/₂(9.8)t²

1.5 = 4.9t²

t² = 1.5/4.9

t² = 0.306

t = 0.55 s

Thus, the time elapsed when the ball and its image are at the same location is 0.55 s.

Learn more about concave mirror here: brainly.com/question/7512320

8 0

1 year ago

A car is traveling 50m/s N on the way home. There was an accident and the car slowed to 10m/s for 10secs What is the car's accel

Brilliant_brown [7]

Answer:

4m/s^2

Explanation:

Acc. = final velocity - initial velocity / time taken

= 50 - 10 / 10

= 40/10 = 4ms^2

4 0

1 year ago

What are 4 properties of medal

zalisa [80]

Metal is shiny, has a high electrical conductivity, a high thermal conductivity, and has a high density. Hope this helps.

3 0

2 years ago

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