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Aliun [14]
3 years ago
12

If a solid forms when two ionic solutions are mixed together in a test tube, what does this indicate?

Chemistry
1 answer:
Ira Lisetskai [31]3 years ago
8 0
<span>If a solid forms when two ionic solutions are mixed together in a test tube, it is an indication of a chemical change

The precipitaion os the solid indicates that a new product has been formed which is not soluble.

When a solid ionic compound is put in water, the compound is dissolved by ionizing (the ions separate and remain in aqueous phase). If you combine two ionic solutions and see a solid precipiate is becasue the ions have combined and form a new compound which is not soluble.
</span>
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A 1.2 L weather balloon on the ground has a temperature of 25°C and is at atmospheric pressure (1.0 atm). When it rises to an el
icang [17]

Answer:

The temperature of the air at this given elevation will be 53.32425°C

Explanation:

We can calculate the final temperature through the combined gas law. Therefore we will need to know 1 ) The initial volume, 2 ) The initial temperature, 3 ) Initial Pressure, 4 ) Final Volume, 5 ) Final Pressure.

Initial Volume = 1.2 L ; Initial Temperature = 25°C = 298.15 K ; Initial pressure = 1.0 atm  ; Final Volume = 1.8 L ; Final pressure = 0.73 atm  

We have all the information we need. Now let us substitute into the following formula, and solve for the final temperature ( T_2 ),

P_1V_1 / T_1 = P_2V_2 / T_2,

T_2 = P_2V_2T_1 / P_1V_1,

T_2 = 0.73 atm * 1.8 L * 298.15 K / 1 atm * 1.2 L = ( 0.73 * 1.8 * 298.15 / 1 * 1.2 ) K = 326.47425 K,

T_2 = 326.47425 K = 53.32425 C

7 0
3 years ago
The atmosphere protects us from all of the following except (4 points)
denis-greek [22]

Global warming, Cosmic Background radiation (even though most is blocked not ALL), and pollution.

8 0
4 years ago
A piece of material with a mass of 755 g is heated to 84.5 c and added to 50 g of water at 5
lana [24]
Alright sorry you're getting the answer hours later, but i can help with this.
so you're looking for specific heat, the equation for it is <span>macaΔTa = - mbcbΔTb with object a and object b. that's mass of a times specific heat of a times final minus initial temperature of a equals -(mass of b times specific heat of b times final minus initial temperature of b)
</span>so putting in your values is, 755g * ca * (75 celsius - 84.5 celsius) = -(50g * cb * (75 celsius - 5 celsius))
well we know the specific heat of water is always 4180J/kg celsius, so put that in for cb
with a bit of simplification to the equation by doing everything on each side first you have, -7172.5 * ca = -14630000
divide both sides by -7172.5 so you can single out ca and you get, ca= 2039.74
add units for specific heat which are J/kg celsius and the specific heat of the material is 2039.74 J/kg celsius

6 0
4 years ago
Help me solve. Djdjdjfjdkdjdjdkdkckckdkck
ivanzaharov [21]
I would believe it to be 55g. A -> B YIELDS AB. So, 10g + 45g = 55g.
4 0
4 years ago
Read 2 more answers
What is the smallest particle of a covalent compound that has the properties of that compound? a molecule an ion an element an a
nalin [4]
An atom is the smallest particle that can have the properties of a compound.
4 0
3 years ago
Read 2 more answers
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