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g100num [7]
3 years ago
11

A student dissolves equal amounts of salt in equal amounts of warm water, room-temperature water, and ice water. Which result is

most likely?
The salt dissolved fastest in the warm water.

The salt dissolved fastest in the ice water.

The salt dissolved in the same amount of time at all three temperatures.

The salt dissolved fastest in the room-temperature water.

I chose the first one but can someone double check for me? Thx
Chemistry
2 answers:
Tanya [424]3 years ago
6 0

doesnt salt desolve ice? so wouldn't the salt dissolve in the ice water?

ziro4ka [17]3 years ago
3 0

Answer:

The salt dissolved fastest in the warm water.  

Step-by-step explanation:

You were correct.

The salt dissolved faster in the warm water, because the water molecules have more kinetic energy to dislodge the salt particles from the surface of the crystal.

The colder the water, the less kinetic energy the water molecules will have, and the more slowly the salt will dissolve.

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The molecule CH20 contains two single bonds and one double bond.<br> True<br> False
dem82 [27]

Answer:

True

Explanation:

The molecule CH20 contains two single bonds and one double bond.

6 0
3 years ago
South Florida is surrounded by salt water. The need for fresh
Lady bird [3.3K]

Answer:

Aquifer

Explanation:

Instead of snowcapped mountains that store water in advance of warmer temperatures, most of our drinking water comes from underground "mountains" of porous materials called aquifers which are replenished by rain. The Biscayne Aquifer is South Florida's lower east coast's primary source of fresh water.

3 0
3 years ago
When active metals such as magnesium are immersed in acid solution, hydrogen gas is evolved. Calculate the volume of H2(g) at 30
V125BC [204]

Answer:

The volume of  H₂ (g) obtained is 22.4L

Explanation:

First of all, think the reaction:

2HCl (aq) + Zn (s) → ZnCl₂ (aq)  + H₂ (g)

You have to add a 2, in the HCl to get ballanced.

Now we should know how many moles of each reactant, do we have.

Volume . Molarity = moles

Notice that volume is in mL, so I must convert to L.

275 mL = 0.275L

0.275L . 0.725mol/L = 0.2 moles of HCl

Molar mass of Zn: 65.41 g/m

50 g / 65.41 g/m = 0.764 moles

Ratio between reactants is 2:1, so I need the double of moles of HCl to react, and a half moles of Zn to react.

My limiting reactant is the HCl, for 0.764 moles of Zinc, I need 1.528 (0.764 .2) of HCl, and I only have 0.2 moles.

Ratio between HCl and H₂ is 1:1, so 0.2 HCl make 0.2 moles of gas

Now apply the Ideal Gas Law, to find out the volume

P. V = n . R . T

2 atm . V = 0.2 mol . 0.08206L atm/K mol . 273K

V =  (0.2 mol . 0.08206L atm/K mol . 273K ) / 2 atm

V = 2.24 L

4 0
3 years ago
An atom has 81 electrons, 84 neutrons, and 82 protons. What element is this atom?
posledela

Answer:

Lead

Explanation:

The subatomic particles within an atom can be used to know the atom or element given.

Of particular interest is the number of protons within the atom.

The periodic table is based on the atomic number of atoms. This atomic number is the number of protons within an atomic space.

So; If we know the number of protons within an atom, we can know the element.

The number of protons given is 82, the element is  therefore lead.

4 0
3 years ago
2.41 x 10^2 Cm to meters
Assoli18 [71]

We know that there are 100 cm in 1 m, so we can use this to convert to meters:

(\frac{2.41x10^{2}cm}{1})*(\frac{1m}{100cm} )=2.41m

Therefore we know that 2.41x10^{2} cm is equal to 2.41 m.

8 0
3 years ago
Read 2 more answers
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