Which statement about the elements in the periodic table is true?

Which statements about scientific explanations are true? I. Scientific explanations must prove that a hypothesis is true. II. Sc

Scilla [17]

Answer:

I. Scientific explanations should be based on evidence or data. III. Scientific explanations must have logical and consistent arguments. IV. Scientific explanations should use scientific principles, models, and theories.

Explanation:

Hypothesis is a proposed explanation for a certain phenomena and it is open for further scientific inquiry. There is no compulsion in science to prove that a given hypothesis is true. In science hypothesis are made, experiments are conducted, observations and data are recorded, data are analyzed and conclusion is reached where a hypothesis is either proven either right or wrong.

7 0

3 years ago

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Prepare a 1.00 L of M solution of sodium carbonate . Determine the amount of sodium carbonate needed incorrect significant figur

Vedmedyk [2.9K]

Answer:b

Explanation:

4 0

3 years ago

International system of units in a sentence

Ilya [14]

SI ( System of units )

hope this helps!

6 0

3 years ago

The image shows a representative sample of 50 atoms of a fictious element, called lemonium ( Le ). Lemonium consists of three is

Keith_Richards [23]

The percentage abundance is a measure of ratio of the number of each isotope and the total number of the element. The percentage abundance of each isotope is :

Le - 19 = 0.32
Le - 17 = 0.44
Le - 15 = 0.24

Number of each isotope in the sample :

Le - 19 = 16
Le - 17 = 22
Le - 15 = 12

Total number of sample = 50

The percentage natural abundance of the isotopes can be calculated :

Number of each isotope ÷ total number of sample

Percentage abundance of Le isotopes

Le - 19 = $\frac{16}{50}=0.32$
Le - 17 = $\frac{22}{50}=0.44$
Le - 15 = $\frac{12}{50}=0.24$

Therefore, the percentage abundance of Le - 19, Le - 17 and Le - 15 isotopes are 0.32, 0.44 and 0.24 respectively.

Learn more : brainly.com/question/16078327

3 0

3 years ago

If you are given an ideal gas with pressure (p)259,392.00 pa and temperature (T)=200°c of 1 mole Argon gas in a volume 8.8dm3,ca

GuDViN [60]

Answer: $R=4.82436 \frac{Pa. m^{3}}{mol. K}$

Explanation:

The Ideal Gas equation is:

$P.V=n.R.T$ (1)

Where:

$P$ is the pressure of the gas

$n$ the number of moles of gas

$R=8.3144598 \frac{Pa. m^{3}}{mol. K}$ is the gas constant

$T$ is the absolute temperature of the gas in Kelvin.

$V$ is the volume

It is important to note that the behavior of a real gas is far from that of an ideal gas, taking into account that <u>an ideal gas is a single hypothetical gas</u>. However, under specific conditions of standard temperature and pressure (T=0\°C=273.15 K and P=1 atm=101,3 kPa) one mole of real gas (especially in noble gases such as Argon) will behave like an ideal gas and the constant R will be $8.3144598 \frac{Pa. m^{3}}{mol. K}$ .

However, in this case we are not working with standard temperature and pressure, therefore, even if we are working with Argon, the value of R will be far from the constant of the ideal gases.

Having this clarified, let's isolate $R$ from (1):