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grandymaker [24]
4 years ago
14

How many times stronger was the earth's magnetic field in 800 B.C.?

Chemistry
2 answers:
MrRa [10]4 years ago
8 0

Answer:

b. 2 times

Explanation:

The earth´s magnetic field decays approximately 10% every 150 years, so form that we can extrapole the fact that 2800 years ago it would be approximately 2 times stronger the earths magnetic field compared to the earth´s magnetic field at this time.

elixir [45]4 years ago
5 0
The answer should be c. 3 times 
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According to Avogadro's law, how will the number of molecules in 2 liters
dexar [7]

According to Avogadro's law, the two gases will have equal number of molecules.

<h3>Avogadro's law </h3>

From the question, we are to determine how the two gases would compare according to Avogadro's law

First, we will state the Avogadro's law

<em>Avogadro's law</em> states that "equal volume of all gases at the <u>same temperature and pressure</u> contain the same number of molecules"

Now, from the given information

We have 2 liters of hydrogen gas and 2 liters of oxygen gas at the <u>same temperature and pressure</u>

According to Avogadro's law, gases that are equal in volume and are at the same temperature and pressure will have equal number of molecules.

Hence, according to Avogadro's law, the two gases will have equal number of molecules.

Learn more on Avogadro's law here: brainly.com/question/26174006

5 0
2 years ago
A compound has a molecular weight of 112. 124 atomic mass units and the empirical formula C3H4O. What is the molecular formula o
NNADVOKAT [17]

The molecular formula of the compound which has a molecular weight of 112.124 atomic mass units is C₆H₈O₂.

<h3>What is molecular formula?</h3>

Molecular formula of any compound tells about the composition and numbers of each entities present in that molecule.

Steps involved in the prediction of molecular formula:

  • First we predict the molar mass of given emperical formula as:

      Molar mass of C₃H₄O = 3(12) + 4(1) + 16 = 56

  • Now we divide the given mass by the calculated mass of empirical formula:

        112.124/56 = 2

  • Now we multiply the subscripts of given empirical formula by this whole number and we get:

        Molecular formula = (C₃H₄O)₂ = C₆H₈O₂

Hence correct option is (E).

To know more about molecular formula, visit the below link:
brainly.com/question/26388921

6 0
2 years ago
Read 2 more answers
because the coldness in the ice cream and the suns gamma rays are hitting the ice cream and then it will start to melt. and that
Neko [114]

Answer:

...

Explanation:

5 0
3 years ago
The pressure exerted by water at the bottom of a well is 0.50 atm. how many mmHg is this?
mariarad [96]

Answer:

0.5 atm is equal to 380mmHg.

Explanation:

For every 1 atm, it is equal to 760mmHg.

Therefore, 0.5 atm is 760/2, which is 380mmHg.

8 0
4 years ago
A solution with a volume of 1.00 l is 0.450 m in ch 3 cooh(aq) and 0.550 m in ch 3 coona(aq). what will the ph be after 0.0800 m
Semenov [28]
Before addition of HCl,

conc. of CH3COOH = 0.450 M
conc. of CH3COONa = 0.550 M

After addition of 0.08 M HCl, following reaction occurs in system:
HCl + CH3COONa ↔  CH3COOH + NaCl

Thus, in reaction system conc. of CH3COOH will increase to 0.53 M (0.08M + 0.450M)
And, conc to CH3COONa will reduce to 0.47 M (0.550M - 0.08M)

Now, conc. of H+ ions = ka \frac{[acid]}{[conjugated base]}
where ka = dissociation constant for acid = 10^-5 for Ch3COOH

∴ conc. of H+ ions = \frac{0.53}{0.47}
                              = 1.1277 x 10^-5

Now, pH = -log [H+] = -log (1.1227 x 10^-5) = 4.94
4 0
3 years ago
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