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Rzqust [24]
2 years ago
9

Eddie is going to do an experiment to find out which freezes more easily—distilled water or salt water. In what order should he

do the following steps in his experiment?
Can you guys answer fast? I need big help

Chemistry
2 answers:
mel-nik [20]2 years ago
4 0

1. Make a Prediction

2. Fill both beakers with water

3. Dissolve salt in one of the beakers

4. Place both in the freezer and observe

5. Write a report

(Always make the prediction first! That's a hypothesis!)

stich3 [128]2 years ago
4 0

Explanation:

A hypothesis is defined as an idea or explanation which is framed without any testing or experimentation.

And, in order to verify the hypothesis we need to perform the experiment. And, on the basis of experimentation we can conclude whether our hypothesis was correct or not.

For example, when we have to perform an experiment to determine which freezes more easily—distilled water or salt water. Then the steps in this experiment should be as follows.

  • Make a prediction about which liquid will freeze first.
  • Fill two beakers with 250 mL of distilled water.
  • Dissolve 30 grams of salt in one of the beakers.
  • Place both beakers in a freezer and observe which liquid freezes first.
  • Write a report on his findings.
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Magnesium reacts with iron(III) chloride to form magnesium chloride (which can be used in fireproofing wood and in disinfectants
svet-max [94.6K]

Answer:

154.0831 g

Explanation:

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Given: For Mg

Given mass = 41.0 g

Molar mass of Mg = 24.31 g/mol

Moles of Mg = 41.0 g / 24.31 g/mol = 1.6865 moles

Given: For FeCl_3

Given mass = 175 g

Molar mass of FeCl_3 = 162.2 g/mol

Moles of FeCl_3 = 175 g / 162.2 g/mol = 1.0789 moles

According to the given reaction:

3Mg_{(s)}+2FeCl_3_{(s)}\rightarrow 3MgCl_2_{(s)}+2Fe_{(s)}

3 moles of Mg react with 2 moles of FeCl_3

1 mole of Mg react with 2/3 moles of FeCl_3

1.6865 mole of Mg react with (2/3)*1.6865 moles of FeCl_3

Moles of FeCl_3 = 1.1243 moles

Available moles of FeCl_3 = 1.0789 moles

Limiting reagent is the one which is present in small amount. Thus, FeCl_3 is limiting reagent. (1.0789 < 1.1243)

The formation of the product is governed by the limiting reagent. So,

2 moles of FeCl_3 gives 3 moles of magnesium chloride

1 mole of FeCl_3 gives 3/2 moles of magnesium chloride

1.0789 mole of FeCl_3 gives (3/2)*1.0789 moles of magnesium chloride

Moles of magnesium chloride = 1.61835 moles

Molar mass of magnesium chloride = 95.21 g/mol

Mass of magnesium chloride = Moles × Molar mass = 1.61835 × 95.21 g = 154.0831 g

6 0
1 year ago
A chunk of dry ice, solid CO2, "disappears" after sitting at room temperature for a while. There is no puddle of liquid. What ha
Vika [28.1K]
I believe the answer is A.
8 0
2 years ago
How many moles of tungsten (W,183.85 g/lol are in 415 grams of tungsten?
vladimir1956 [14]

Given mass of tungsten, W = 415 g

Molar mass of tungsten, W = 183.85 g/mol

Calculating moles of tungsten from mass and molar mass:

415 g * \frac{1 mol}{183.85 g} = 2.26 mol W

7 0
1 year ago
What volume of 0.500 M HNO₃(aq) must completely react to neutralize 100.0 milliliters of 0.100 M KOH(aq)?
USPshnik [31]

Answer:

v = 500 milliliters

Explanation:

HNO_{3}  ⇒  H^{+}  + NO^{3-}

KOH  ⇒  K^{+}  + OH^{-}

1 H^{+} to 1 OH^{-}

\frac{0,5}{V}  = \frac{0,1}{100} \\\\v * 0,1 = 50\\v = 500 milliliters

4 0
2 years ago
An ice cube is dropped into a glass of milk at 20°C. Which statement explains the transfer of kinetic energy (KE)?
hoa [83]

Answer:

Because milk has higher KE than ice, KE is transferred from the milk to the molecules of ice.

Explanation:

The best statement that expresses the transfer of kinetic energy(K.E) is that kinetic energy is transferred from the milk to the ice.

Kinetic energy is form of energy due to motion of the particles of a medium. In this regard, we are dealing with heat energy.

  • Heat energy is dissipated from a body at higher temperature to one at a lower temperature.
  • Ice is at a lower temperature which is 0°C
  • Heat will be transferred in form of thermal energy from the body at higher temperature to one with a lower temperature.
  • This is from the milk to the molecules of ice.
3 0
1 year ago
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