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3 years ago

Balancing equations I'll give brainliest.

Chemistry

1 answer:

wel3 years ago

7 0

Answer:

You should follow these steps:

Count each type of atom in reactants and products.

Place coefficients, as needed, in front of the symbols or formulas to increase the number of atoms or molecules of the substances.

Repeat steps 1 and 2 until the equation is balanced.

Explanation:

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Explanation:

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What makes a person scientifically literate? In three to five sentences, explain your answer.

BartSMP [9]

It means that a person has the ability to describe, explain, and predict natural phenomena. Scientific literacy entails being able to read with understanding articles about science in the popular press and to engage in social conversation about the validity of the conclusions. Scientific literacy implies that a person can identify scientific issues underlying national and local decisions and express positions that are scientifically and technologically informed. A literate citizen should be able to evaluate the quality of scientific information on the basis of its source and the methods used to generate it. Scientific literacy also implies the capacity to pose and evaluate arguments based on evidence and to apply conclusions from such arguments appropriately.

hope this helps and sorry if this is wrong

5 0

2 years ago

Read 2 more answers

A novel process for obtaining magnesium from sea water involves several reactions. Write a balanced chemical equation for each s

zysi [14]

Answer: a) $CaCO_3(s)\rightarrow CaO(s)+CO_2(g)$

b) $CaO(s)+H_2O(l)\rightarrow Ca(OH)_2(s)$

c) $Ca(OH)_2(aq)+MgCl_2(aq)\rightarrow Mg(OH)_2(s)+CaCl_2(aq)$

d) $Mg(OH)_2(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2O(l)$

e) $MgCl_2(l)\rightarrow Mg(l)+Cl_2(g)$

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

he salts which are soluble in water are designated by symbol (aq), those in solid form are represented by (s), those in liquid form are represented by (l) and those in gaseous form are represented by (g) after their chemical formulas.

a) decomposition of solid calcium carbonate from seashells to form solid calcium oxide and gaseous carbon dioxide:

$CaCO_3(s)\rightarrow CaO(s)+CO_2(g)$

b) formation of solid calcium hydroxide as the only product from the reaction of the solid calcium oxide with liquid water

$CaO(s)+H_2O(l)\rightarrow Ca(OH)_2(s)$

c) calcium hydroxide is then added to the seawater, reacting with dissolved magnesium chloride to yield solid magnesium hydroxide and aqueous calcium chloride

$Ca(OH)_2(aq)+MgCl_2(aq)\rightarrow Mg(OH)_2(s)+CaCl_2(aq)$

d) solid hydroxide is added to a hydrochloric acid solution producing dissolved magnesium chloride and liquid water

$Mg(OH)_2(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2O(l)$

e) magnesium chloride is melted and electrolyzed metal and diatomic chlorine gas.

$MgCl_2(l)\rightarrow Mg(l)+Cl_2(g)$

4 0

3 years ago

Morphine, C 17H 19NO 3, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 2

uysha [10]

Answer:

pH = 9.58

Explanation:

First of all, we need to determine the molarity of the solution.

We determine the molar mass of morphine:

12g/m . 17 + 1 g/m . 19 + 14 g/m + 16 g/m . 3 = 285.34 g/m

molar mass g/m, is the same as mg/mm

25 mg . 1 mmol / 285.34 mg = 0.0876 mmoles / 100 mL = 8.76×10⁻⁴ M

In diltuted solution, we must consider water.

Mass balance for morphine = [Morphine] + [Protonated Morphine]

8.76×10⁻⁴ M = [Morphine] + [Protonated Morphine]

As Kb is too small, I can skipped, the [Protonated Morphine]

8.76×10⁻⁴ M = [Morphine]

In the charge balance I will have:

[OH⁻] = [H⁺ morphine] + [H⁺]

Let's go to the Kb expression

Morphine + H₂O ⇄ MorphineH⁺ + OH⁻ Kb

Kb = [MorphineH⁺] [OH⁻] / [Morphine]

Kb = [MorphineH⁺] [OH⁻] / 8.76×10⁻⁴ M

So now, we need to clear [MorphineH⁺] to replace it in the charge balance

Kb . 8.76×10⁻⁴ M / [OH⁻] = [MorphineH⁺]

Now, the only unknown value is the [OH⁻]

[OH⁻] = Kb . 8.76×10⁻⁴ M / [OH⁻] + Kw/[OH⁻]

Remember that Kw = [H⁺] . [OH⁻]

[H⁺] = Kw/[OH⁻]

[OH⁻]² = 1.62×10⁻⁶ . 8.76×10⁻⁴ + 1×10⁻¹⁴

[OH⁻] = √(1.62×10⁻⁶ . 8.76×10⁻⁴ + 1×10⁻¹⁴)

[OH⁻] = 3.76×10⁻⁵ → - log [OH⁻] = pOH = 4.42

pH = 14 - pOH → 14 - 4.42 = 9.58

8 0

3 years ago