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3 years ago

10

What does it mean for data to be repuducible? How would you conduct an experiment in such a way as to get data that are reproduc

ible?

1 answer:

murzikaleks [220]3 years ago

4 0

Exact same conditions as the previous tests. Use the word "variable" instead of conditions though.

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Identify the best practices for writing

Bogdan [553]

• Gather facts and define key points and goals.

• Structure your tone and context for your audience.

• Make it clear.

• Make it appealing and help the reader navigate.

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3 years ago

What mass of powdered drink mix is needed to make 0.5 M solution of 100 ml

Vladimir [108]

Answer:

There is 17,114825 g of powdered drink mix needed

Explanation:

Step 1 : Calculate moles

As given, the concentration of the drink is 0.5 M, this means 0.5 mol / L

Since the volume is 100mL, we have to convert the concentration,

⇒0.5 / 1 = x /0.1 ⇒ 0.5* 0.1 = x = 0.05 M

This means there is 0.05 mol per 100mL

e

Step 2 : calculate mass of the powdered drink

here we use the formula n (mole) = m(mass) / M (Molar mass)

⇒ since powdered drink mix is usually made of sucrose (C12H22O11) and has a molar mass of 342.2965 g/mol.

0.05 mol = mass / 342.2965 g/mol

To find the mass, we isolate it ⇒0.05 mol * 342.2965 g/mol = 17,114825g

There is 17,114825 g of powdered drink mix needed

5 0

3 years ago

What are the variables in Gay-Lussac’s law?

labwork [276]

This law<span> states that the pressure of a given amount of </span>gas<span> held at constant volume is directly proportional to the Kelvin temperature. Therefore, the variables are pressure and temperature. Hope this answers the question. Have a nice day.</span>

6 0

3 years ago

1. convert 8.43 x 1025 atoms of Fe to moles

Luba_88 [7]

Answer:

The number of moles of Fe are, 139.9 moles.

The number of moles of CO are, 7.89 moles.

The number of moles of Al are, $4.04\times 10^{-4}$ moles.

Explanation :

As we know that 1 mole of substance contains $6.022\times 10^{23}$ atoms or molecules.

Part 1:

As, $6.022\times 10^{23}$ atoms of Fe present in 1 mole

So, $8.43\times 10^{25}$ atoms of Fe present in $\frac{8.43\times 10^{25}}{6.022\times 10^{23}}\times 1=139.9$ mole

Thus, the number of moles of Fe are, 139.9 moles.

Part 2:

As, $6.022\times 10^{23}$ molecules of CO present in 1 mole

So, $4.75\times 10^{24}$ molecules of CO present in $\frac{4.75\times 10^{24}}{6.022\times 10^{23}}\times 1=7.89$ mole

Thus, the number of moles of CO are, 7.89 moles.

Part 3:

As, $6.022\times 10^{23}$ atoms of Al present in 1 mole

So, $2.43\times 10^{20}$ atoms of Al present in $\frac{2.43\times 10^{20}}{6.022\times 10^{23}}\times 1=4.04\times 10^{-4}$ mole

Thus, the number of moles of Al are, $4.04\times 10^{-4}$ moles.

4 0

3 years ago

What could cause a experiment to be less reliable

dedylja [7]

Two unstable elements that will react to almost anything

6 0

3 years ago