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Arlecino [84]
3 years ago
10

[OU.04] An astronomer has proposed a new theory about the evolution of the universe. Which of these would prevent the proposed t

heory from being discarded? (2 points) discussion about the theory on television explanation of the theory by some students publication of the theory in a science magazine acceptance of the theory by a majority of scientists
Chemistry
2 answers:
koban [17]3 years ago
6 0

Answer:

Acceptance of the theory by a majority of scientists.

Explanation:

A proposed theory could be rejected when it is tested and does not provide the same results by different scientists. If same evidence is gathered by majority of the scientists, then it is accepted. A new theory is accepted when it gives the same results on multiple testing.

Oduvanchick [21]3 years ago
5 0
Acceptance of the theory by a majority of scientists
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1) What is the mass of 6.2 mol of K2CO3?
lorasvet [3.4K]

Answer:

\boxed {\boxed {\sf 856.8648 \ grams \ of \ K_2CO_3}}

Explanation:

To convert from moles to grams, we must find the molar mass.

1. Molar Mass

First, identify the elements in the compound. K₂CO₃ It has potassium, carbon, and oxygen. Find these elements and their masses on the Periodic Table.

  • K: 39.098 g/mol
  • C: 12.011 g/mol
  • O: 15.999 g/mol

Note the subscript of 2 after K and 3 after O. We must multiply oxygen's molar mass by 2, then oxygen's by 3, and add carbon.

  • 2(39.098 g/mol) + 3(15.999 g/mol) + 12.011 g/mol= 138.204 g/mol

2. Convert Moles to Grams

Use the molar mass as a fraction.

\frac {138.204 \ g \ K_2CO_3}{1 \ mol \ K_23CO_3}

Multiply by the given number of moles: 6.2

6.2 \ mol \ K_2CO_3 *\frac {138.204 \ g \ K_2CO_3}{1 \ mol \ K_23CO_3}

6.2  *\frac {138.204 \ g \ K_2CO_3}{1 }

6.2  * {138.204 \ g \ K_2CO_3}

856.8648 \ g \ K_2CO_3

There are <u>856.8648 grams</u> of potassium carbonate in 6.2 moles.

4 0
3 years ago
It takes a season to create a hybrid, and about 15 years to create a_____.
andreev551 [17]

•It takes a season to create a hybrid, and about 15 years to create a <u>Plant </u><u>va</u><u>r</u><u>iety.</u>

may this helps you

hope it's correct

bye

4 0
3 years ago
Gallium (atomic number 31) is in group 13 (IIIA). In addition to the s type electrons, it will have how many electrons in the 4p
qwelly [4]

Answer:

One electron is present in 4p energy sublevel.

Explanation:

Gallium element has symbol Ga with atomic number 31.

It is placed in group 13 and fourth period in the modern periodic table.

The electronic configuration of the element, gallium is -  

1s^22s^22p^63s^23p^63d^{10}4s^24p^1

As seen, from the configuration,

<u>One electron is present in 4p energy sublevel.</u>

3 0
3 years ago
CO2 and H2O are both compounds. How do you know
Eva8 [605]

Answer:

neutral groups of atoms formed by covalent bonds.

3 0
3 years ago
gold is heavier than aluminium if we put a 100 gram biscuit of gold in water taken in a measuring cylinder or we put a 100 gram
kati45 [8]

Answer:

The level of the water will be higher for 100g Al because occupy more space than gold.

Explanation:

To understand this problem, we must know Archimedes' principle:

"A body that is submerged in a fluid produce a bouyant force equal to the weight of the fluid that the body displaces". The volume of the body is equal to the volume displaced in the liquid.

Now, as gold is heavier than aluminium, 100g of Al have more volume than 100g of gold, than means:

<h3>The level of the water will be higher for 100g Al because occupy more space than gold.</h3>

4 0
4 years ago
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