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Anna [14]
3 years ago
13

Which pair of substances would most likely result in the production of a solid when reacting with a base? litmus and phenolphtha

lein soluble metal salt and carbon dioxide acids and water hydrogen ions and soaps
Chemistry
2 answers:
svet-max [94.6K]3 years ago
8 0
<h3><u>Answer;</u></h3>

<em>Soluble metal salt and carbon dioxide</em>

<h3><u>Explanation;</u></h3>

Both <u><em>soluble metal salt and carbon dioxide</em></u> may react with a base to form a solid or what we call a precipitate.

  • For instance when <u><em>carbon dioxide is bubbled through a solution of calcium hydroxide, it results to the formation or precipitate calcium carbonate.</em></u>

<em>Ca(OH)₂(aq) + CO₂(g) → CaCO₃(s) + H₂O(l)</em>

  • For the case of a soluble metal salt; an example is calcium nitrate, which is <em><u> a soluble metal salt, when reacted with a base like sodium hydroxide, it results to the formation of a solid calcium hydroxide</u></em> and sodium nitrate, a reaction called precipitation reaction.

<em>Ca(NO₃)₂(aq) + NaOH (aq)→ Ca(OH)₂(s) + NaNO₃(aq)</em>

iren2701 [21]3 years ago
6 0

Answer:

It is B on e2020

Explanation:

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Which components make up bronfenbrenner's ecological theory?(choose every correct answer.)
kari74 [83]

Which components make up bronfenbrenner's ecological theory?

Bronfenbrenner divided the person's environment into five different systems:

  • microsystem
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  • exosystem
  • macrosystem
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What is bronfenbrenner's ecological theory?

  • Bronfenbrenner's ecological systems theory views child development as a complex system of relationships affected by multiple levels of the surrounding environment, from immediate settings of family and school to broad cultural values, laws, and customs.
  • To study a child's development then, we must look not only at the child and her immediate environment, but also at the interaction of the larger environment as well.
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  • This is the most immediate environmental settings containing the developing child, such as family and school.
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7 0
1 year ago
PLEASE ANSWER IF YOU KNOW
Lerok [7]

Answer:

The tundra!

Explanation:

It is the only biome that has an average winter temperature of -26 degrees Celsius, gets 12-20 inches of rain per year, and has grazing caribou!

Hope this helps!

3 0
3 years ago
65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large
Brilliant_brown [7]

Answer:

65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large

deposit of dust that contained substances only found in asteroids, What most likely killed off the dinosaurs?

Explanation:

3 0
3 years ago
How many grams of KBr are required to make 350. mL of a 0.115 M KBr solution?
Vsevolod [243]
0.115 M means that 0.115 moles of KBr are contained in a volume of 1000 ml, therefore a volume of 350 ml will have (0.115 × 0.35) = 04025 moles
From the formula of molarity moles = molarity × volume in liters
1 mole of KBr is equivalent to 119 g
Therefore, the mass = 0.04025 ×  119  g = 4.79 g
6 0
4 years ago
Read 2 more answers
If your lawn is 21.0 ft wide and 20.0 ft long, and each square foot of lawn accumulates 1350 new snow flakes every minute. How m
GaryK [48]
<span>First we can calculate the area of the rectangular lawn using the formula:
Area = Width x Length = 21 ft x 20 ft = 420 square feet
       
And the total number of snow flakes per minute on the entire lawn is:
   
(1350 snowflakes per minute per square foot) x (420 square feet) = 567,000 snowflakes per minute
       
In one hour (or 60 minutes) we get a total of:
   
(567,000 snowflakes per minute) x (60 minutes / 1 hour) = 34,020,000 snowflakes
       
The total mass of which would be:
   
34,020,000 snowflakes x 1.60 mg = 54,432,000 mg = 54.432 kg (as 1 kg = 1,000,000 mg).
       
So 54.432 kg of snow accumulates every hour on the lawn.</span>
7 0
3 years ago
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