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Setler79 [48]
3 years ago
14

Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coeffici

ent is "1."
Ca(OH)2 + H3PO4 → Ca3(PO4)2 + H2O
Chemistry
1 answer:
saveliy_v [14]3 years ago
4 0

3 Ca(OH)2 + 2 H3PO4 => 1 Ca3(PO4)2 + 6 H2O

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Aliyah marks a line on her driveway with a piece of chalk and another line 50ft away Then she stands with both feet at the line
Mariulka [41]

Answer:

Speed

Explanation:

Aliyah must have been trying to find her speed.

The speed is a measure of how fast an object or a body is and it is calculated by finding the ratio of distance with time. Mathematically,

  speed = \frac{distance}{time} with a unit of m/s.

<em>Hence, with the distance measured on the ground and Aliyah trying to find the time it will take her to cover the distance while running, she must have been trying to find how fast she can run, that is, speed. </em>

3 0
3 years ago
What is the minimum amount of energy<br> that can be gained or lost by an atom?
Dahasolnce [82]

Answer:

quantum (93) the minimum quantity of energy that can be lost or gained by an atom (plural: quanta)

Explanation:

A quantum is the minimum amount of any physical entity involved in an interaction.

4 0
4 years ago
The emission spectrum of cesium contains two lines whose frequencies are (a)
Lady bird [3.3K]

The lines are violet and blue respectively.

<h3>What is the energy?</h3>

We know that the energy of the photon could be obtained by the use of the equation;

E = hf

E = energy

h = Plank's constant

f = frequency

For the first line;

E = 6.6 * 10^-34 Js * 3.45 x 10^14 Hz = 2.3 * 10^-19 J

Given that;

E = hc/λ

λ = hc/E

λ = 6.6 * 10^-34 * 3 * 10^8/2.3 * 10^-19

λ = 8.61 * 10^-7 m or 861 nm

The color is violet

For the second line;

E = 6.6 * 10^-34 Js * 6.53 xx 10^14 Hz

E = 4.3 * 10^-19 J

E = hc/λ

λ = hc/E

λ =  6.6 * 10^-34 * 3 * 10^8/4.3 * 10^-19

λ = 4.60 * 10^- 7 m or 460 nm

The color is blue

Learn more about emission spectrum:brainly.com/question/13537021

#SPJ1

8 0
2 years ago
What type of reaction is Ni + MgSo4
kumpel [21]
Chemical- it produces ammonia.
4 0
3 years ago
8)
Kobotan [32]
Don’t know this oneeeeeeeeeeeee
4 0
3 years ago
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