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4 years ago

Which metal can replace Cr in Cr2O3

1 answer:

6 0

The appropriate response is Aluminum. It has higher in the movement arrangement than a nickel. Aluminum metal is so artificially responsive that local examples are uncommon and constrained to outrageous decreasing conditions. Rather, it is discovered joined in more than 270 unique minerals.

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Read the lab procedure for a controlled experiment that looks at the effect of heat on the circumference of bicycle tires.

gavmur [86]

The last step (step 5) in the experiment is to write a conclusion for the experiment. (Option B).

<h3>What is an experiment?</h3>

The essence of an experiment is to be able to establish a cause and effect relationship. It is only when we carry out a carefully controlled experiment that we can say that x causes y because the data would support our findings.

After, we have carried out an experiment, the next step is to put the evidences together and then try to arrive at a logical conclusion for the experimental procedure.

Thus the last step (step 5) in the experiment is to write a conclusion for the experiment. (Option B).

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5 0

2 years ago

A titration is performed where 0.150M sodium hydroxide solution is added to a solution of KHP.

KengaRu [80]

Answer:

0.00375 moles OF KHP

Explanation:

Equation of reaction of NaOH and KHP :

KHC₈H₄ O₄(aq) + NaOH(aq) → NaKC₈H₄O₄(aq) + H₂O(l)

the reaction required 25ml

Molarity = no of mole / volume in liters

no of moles = Molarity × volume in liters

no of moles of NaOH = 0.150 × (25/1000) = 0.00375 moles

using the balanced equation above

1 mole of NaOH requires 1 mole of KHP

therefore

0.00375 mole of NaOH will require 0.00375 mole KHP.

6 0

3 years ago

a 150.0 ml sample of an aqueous solution at 25°c contains 20.0 mg of an unknown nonelectrolyte compound. if the solution has an

Nostrana [21]

The molar mass of the unknown compound is <u>223.2 g/mol.</u>

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Solution:

Molarity = $\frac{Weight}{molecularweight} * \frac{1000}{Volume (ml)}$

$4.54*10^{-4} = \frac{0.0152g}{molecularweight} * \frac{1000}{150.ml}$

Molecular weight =<u> 223.2 g/mol</u>

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The main difference between the two is that molar mass refers to the mass of one mole of a particular substance. Molecular weight is the mass of a molecule of a particular substance. Although the definitions and units of molar mass and molecular weight are different, the values are the same.

The formula mass of a molecule is the sum of the atomic weights of the atoms in that molecular formula. The molecular weight of a molecule is the average mass calculated by adding the atomic weights of the atoms in the molecular formula. Molecular weight is the mass of a single molecule, specifically the mass of material required to make a single mole.

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3 0

2 years ago

Who can use scientific inquiry and what does it involve?

expeople1 [14]

Anyone can use it it involves asking questions.observing and and inferrring experimenting and collecting datafinding evidence drawing conclusions

4 0

3 years ago

What is the mass, in pounds, of 389 mL of a gas that has a density of 1.29 g/L?

devlian [24]

Answer: Mass of gas is 0.001 pounds.