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Rufina [12.5K]
3 years ago
9

In order to say that carbon dioxide caused global warming scientists had to A.Come up with a mechanism that made sense and test

the steps in the mechanism to see if they were accurate B. Make a good argument for climate change and publish it in a research journal C. Make a graph that showed that carbon dioxide and the Earth’s temperature were increasing at the same time D.Review the weather patterns on Earth to see if they were changing over time
Chemistry
1 answer:
Bumek [7]3 years ago
6 0

Answer:

Option A.

Explanation:

Option A directly tests the cause and effect. Option B simply argues it argumentatively without any solid evidence to show cause and effect. Option C only shows correlation and Option D only shows correlation as well.

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Let’s start by finding the location on the periodic table for the atoms for substances that conduct when dissolved. What do you
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Answer:

Explanation:

This question appear incomplete. However, chemical substances that conduct electricity when dissolved in water are elctrovalent/ionic compounds. These compounds are usually made up of elements in group 1 and group 7 (for example NaCl, NaI and LiF) but could also be made up of group 2, group 3 and group 6 [for example Mg(OH)₂ and Al(OH)₃]. Thus, they can be loosely said to be found in those groups in the S and P blocks of the periodic table.

NOTE:

Sodium (Na) is found in group 1 (S-block)

Lithium (Li) is found in group 1 (S-block)

Chlorine (Cl) is found in group 7 (P-block)

Iodine (I) is found in group 7 (P-block)

Flourine (F) is found in group 7 (P-block)

Magnesium (Mg) is found in group 2 (S-block)

Aluminium (Al) is found in group 3 (S-block)

Oxygen (O) is found in group 6 (P-block)

Hydrogen (H) is found in group 1 (S-block)

3 0
3 years ago
How many moles of Na2SO4 are present in 284.078 grams of Na2SO4?<br> A. 2<br> B. 3<br> C. 5<br> D. 6
son4ous [18]
I think it’s b but i could be wrong
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3 years ago
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Determine the pH of the following base solutions. (Assume that all solutions are at 25°C and the ion-product constant of water,
alexira [117]

Answer:

a) The pH of the solution is 12.13.

b) The pH of the solution is 12.17.

Explanation:

Ionic product of water =K_w=1.01\times 10^-{14}

K_w=[H^+][OH^-]

1.01\times 10^-{14}=[H^+][OH^-]

Taking negative logarithm on both sides:

-\log[1.01\times 10^-{14}]=(-\log [H^+])+(-\log [OH^-])

The pH is the negative logarithm of hydrogen ion concentration in solution.

The pOH is the negative logarithm of hydroxide ion concentration in solution.

13.99=pH+pOH

a) 1.39\times 10^{-2} M of NaOH.

Concentration of hydroxide ions:

NaOH(aq)\rightarrow Na^+(aq)+OH^-(aq)

So, [OH^-]=1\times [NaOH]=1\times 1.39\times 10^{-2} M=1.39\times 10^{-2} M

pOH=-\log[1.39\times 10^{-2} M]=1.86

13.99=pH+pOH

13.99=pH+1.86

pH=13.99-1.86=12.13

b) 0.0051 M of NaOH.

Concentration of hydroxide ions:

Al(OH)_3(aq)\rightarrow Al^{3+}(aq)+3OH^-(aq)

So, [OH^-]=3\times [Al(OH)_3]=3\times 0.0051 M=0.0153 M

pOH=-\log[0.0153 M]=1.82

13.99=pH+pOH

13.99=pH+1.82

pH=13.99-1.82=12.17

6 0
4 years ago
What is thermal energy transfer?
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Answer:

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Explanation:

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3 years ago
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Salts are composed of ions that form a tightly packed and ordered network, which is called a crystal lattice, and it is held tog
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This is held together by the charges of anions and cations that are attracted to each other, which is the reason why crystal lattice is being formed beside the fct that it has tightly packed network. The crystal lattice are the crystals which has an arrangement that could be describe with its three dimensional feature.
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4 years ago
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