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3 years ago

Several years ago, a group of scientists discovered evidence for a new element not found on the periodic table. Most

Chemistry

1 answer:

MatroZZZ [7]3 years ago

3 0

It is beneficial because it provides stronger support for the evidence related to the discovery

Answer: The correct answer is the second option that is given with shows it is beneficial.

Explanation:

The discovery of an element whose properties are known from before would make it easier for the scientists to know the properties of elements and its uses after the discovery of element.

Since the elements’ properties are already known as element that possesses these properties and will look forward to find that and once the element is found the element can be named and can be used directly, since its uses are already known.

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How many grams of HF are needed to react with 3.0 moles of Sn? *

Lostsunrise [7]

Answer:

120g

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

Sn + 2HF —> SnF2 + H2

Next, we shall determine the number of mole of HF needed to react with 3 moles of Sn.

From the balanced equation above, 1 mole of Sn reacted with 2 moles of HF.

Therefore, 3 moles of Sn will react with = 3 x 2 = 6 moles of HF.

Finally, we shall convert 6moles of HF to grams

This is illustrated below:

Number of mole of HF = 6moles

Molar Mass of HF = 1 + 19 = 20g/mol

Mass of HF =..?

Mass = number of mole x molar Mass

Mass of HF = 6 x 20

Mass of HF = 120g

Therefore, 120g of HF is needed to react with 3 moles of Sn

6 0

3 years ago

Which of the following is an example of a compound? CaCl2 Na Nd Cu

madam [21]

CaCl2

All of the other choices are elements

5 0

3 years ago

What would be the molarity of a solution in which 0.56 mole of NaCl is dissolved in enough water to make 2.7 L of solution?

yan [13]

Answer:

Molarity = 0.21 M

Explanation:

Moles solute (mol) = Volume solution (L) x Molarity solution (M)

0.56 mol NaCl = 2.7 L x M

M = 0.2074074074

5 0

2 years ago

What letter on the model titration curve corresponds to the point where ph equals the numerical value of pka for hpr? what speci

irakobra [83]

Letter C on the model titration curve corresponds to the point where pH equals the numerical value of pKa for HPr

<h3>What is a titration curve?</h3>

A titration curve is a graph of the pH of a solution against increasing volumes of an acid or a base that is added to the solution.

The pH of a solution is the negative logarithm to base ten of the hydrogen ion concentration and is a measure of the acidity or alkalinity of the solution.

The pKa is the acid dissociation constant of an acid solution.

In a titration of a strong acid and strong base, the pH at equivalence point is equal to the pKa of the acid.

The equivalence point is the point when equal moles of acids and base has reacted.

In the given titration curve, pH = pKa at point C.

In conclusion, for a titration curve of strong acid and base, at equivalence point, pH is equal to pKa of acid.

Learn more about equivalence point at: brainly.com/question/23502649

#SPJ1

4 0

2 years ago

Which metal reacts spontaneously with SR2+ Ions

GREYUIT [131]

Answer:

The metal that spontaneously reacts with NiCl₂ is Zn solid.

Explanation:

3 0

3 years ago

Read 2 more answers