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Sedbober [7]
3 years ago
7

Two scientists wrote a paper detailing their research and conclusions and submitted it to a scientific journal. Several months l

ater, they received the paper back from the publisher with many comments attached from several fellow scientists. What is most likely the next step taken by the authors of the paper?
Chemistry
1 answer:
Semmy [17]3 years ago
6 0
<span>Two scientists wrote a paper detailing their research and conclusions and submitted it to a scientific journal. Several months later, they received the paper back from the publisher with many comments attached from several fellow scientists. It is either that they revise their study or replicate the study. Most scientists would revisit their work and the findings they had from their research. Most probable if they were successful and the comments of the publisher and the co-scientists were positive they could replicate the study to validate its accountability.<span>
</span></span>
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If a sample is thought to be several million years old, which method would best help to determine its absolute age?
Makovka662 [10]
The answer is B)Ar-40/k-40
6 0
3 years ago
A 5.00g of X, the product of organic synthesis is obtained in a 1.0 dm3 aqueous solution. Calculate the mass of X that can be ex
Anestetic [448]

Answer:

mass of X extracted from the aqueous solution by 50 cm³ of ethoxy ethane = 3.33 g

Explanation:

The partition coefficient of X between ethoxy ethane (ether) and water, K is given by the formula

K = concentration of X in ether/concentration of X in water

Partition coefficient, K(X) between ethoxy ethane and water = 40

Concentration of X in ether = mass(g)/volume(dm³)

Mass of X in ether = m g

Volume of ether = 50/1000 dm³ = 0.05 dm³

Concentration of X in ether = (m/0.05) g/dm³

Concentration of X in water = mass(g)/volume(dm³)

Mass of X in water left after extraction with ether = (5 - m) g

Volume of water = 1 dm³

Concentration of X in water = (5 - m/1) g/dm³

Using K = concentration of X in ether/concentration of X in water;

40 = (m/0.05)/(5 - m)

(m/0.05) = 40 × (5 - m)

(m/0.05) = 200 - 40m

m = 0.05 × (200 - 40m)

m = 10 - 2m

3m = 10

m = 10/3

m = 3.33 g of X

Therefore, mass of X extracted from the aqueous solution by 50 cm³ of ethoxy ethane = 3.33 g

8 0
3 years ago
A scientific ________ must have a control, so that the variables that could affect the out come is reduced. A:experiment B:concl
Lostsunrise [7]

Answer:

A.experiment

Explanation:

hope this helps

4 0
3 years ago
What is the name of the molecule that is used to heat most of our buildings?<br><br> (Chemistry)
mario62 [17]

Answer:

Fluids (air/water) either as water vapour or oxygen and carbon dioxide.

Explanation:

Heat transfer occurs through conduction, convection or radiation.

Many aties, this involves fluids whose molecules have been activated by heated by heat, moving from hotter to cooler regions, allowing for heating or cooling of the rooms.

Building materials have varying conductivity.

7 0
3 years ago
hich of the following is best described as a decomposition reaction? HCl + NaHCO3 → H2O + CO2 + NaCl 2Na + Cl2 → 2NaCl 2HgO → 2H
sp2606 [1]

Answer:

The answer to your question is: c

Explanation:

A descomposition reaction is a chemical reaction in which the only one reactant yields two or more products.

a) HCl + NaHCO3 → H2O + CO2 + NaCl

This is not a descomposition reaction because there are two reactants not one, this option is incorrect.

b) 2Na + Cl2 → 2NaCl

THis option is also incorrect because there are two reactants in descompositin reaction there is only one reactant.

c) 2HgO → 2Hg + O2

There are only one reactant that yields 2 products, this is a descomposition reaction.

d) AgNO3 + NaCl → AgCl + NaNO3

THis is not a descomposition reaction because there are two reactants.

6 0
4 years ago
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