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3 years ago

Which two elements weather rocks by smoothing them? look below to ansawer

Chemistry

2 answers:

zloy xaker [14]3 years ago

3 0

Water and wind is the correct answer

Sliva [168]3 years ago

3 0

Water and wind is the answer

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Which layer of the atmosphere is between the stratosphere and the thermosphere

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Mesosphere is what is in between

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3 years ago

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Which of the following elements is represented by the orbital diagram?

aalyn [17]

The answer is A I hope it was right

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4 years ago

Gabriel used an old basketball to model the sun. He altered the ball’s surface to show the sun’s surface features. First, he pai

Crank

Answer:what’s the answer

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3 years ago

Given that it requires 27.9 ml of 0.270 m na2s2o3(aq) to titrate a 15.0-ml sample of i3–(aq), calculate the molarity of i3–(aq)

Digiron [165]

The molar concentration of the KI_3 solution is 0.251 mol/L.

Step 1. Write the balanced chemical equation

I_3^(-) + 2S_2O_3^(2-) → 3I^(-) + S_4O_6^(2-)

Step 2. Calculate the moles of S_2O_3^(2-)

Moles of S_2O_3^(2-)

= 27.9 mL S_2O_3^(2-) ×[0.270 mmol S_2O_3^(2-)/(1 mL S_2O_3^(2-)]

= 7.533 mmol S_2O_3^(2-)

Step 3. Calculate the moles of I_3^(-)

Moles of I_3^(-) = 7.533 mmol S_2O_3^(2-)))) × [1 mmol I_3^(-)/(2 mmol S_2O_3^(2-)] = 3.766 mmol I_3^(-)

Step 4. Calculate the molar concentration of the I_3^(-)

c = "moles"/"litres" = 3.766 mmol/15.0 mL = 0.251 mol/L

6 0

4 years ago

En el laboratorio, un vaso precipitado vacío tiene una masa de 0,50 kg. Este vaso se llena con 300 cm3 de una solución saturada

faust18 [17]

Answer:

Density = 0.0007667 Kg/cm³

Explanation:

Given the following data;

Mass of empty beaker = 0.50 kg

Volume of solution = 300 cm³

Mass of glass+solution = 730 g

To find the density of the solution in the glass;

First of all, we would convert the value in grams to kilograms.

Conversion:

1000 grams = 1 kg

730 = X kg

Cross-multiplying, we have;

X = 730/1000 = 0.73 kg

Next, we would determine the mass of the solution.

Mass of solution = Mass of glass+solution - Mass of empty beaker

Mass of solution = 0.73 - 0.50

Mass of solution = 0.23 kg

Lastly, we would solve for the density of the solution;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the formula;

$Density = \frac {mass}{volume}$

Substituting into the formula, we have;

$Density = \frac {0.23}{300}$

Density = 0.0007667 Kg/cm³

4 0

3 years ago