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AfilCa [17]
2 years ago
5

Bakit mahalaga ang paghahanda ng pambansang badyet sa isang taon?​

Chemistry
1 answer:
Andreas93 [3]2 years ago
8 0

Answer:

no lo sé chico ve a morir en un agujero

Explanation:

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What mass of hbr (in g) would you need to dissolve a 3.4 −g pure iron bar on a padlock?
vivado [14]

<u>Given:</u>

Mass of pure iron (Fe) = 3.4 g

<u>To determine:</u>

Mass of HBr needed to dissolve the above iron

<u>Explanation:</u>

Reaction between HBr and Fe is

Fe + 2HBr → FeBr₂ + H₂

Based on the reaction stoichiometry-

1 mole of Fe reacts with 2 moles of HBr

# moles of Fe = mass of Fe/atomic mass of Fe = 3.4/56 g.mol⁻¹ = 0.0607 moles

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Ans: Mass of HBR required is 9.83 g

5 0
3 years ago
When equal volumes of 0.5 M HCl and 0.5 M Ca(OH)2 are mixed, the resulting solution is
Mademuasel [1]

The concentration of mixed solution = 0.5 M

<h3> Further explanation </h3>

Given

0.5 M HCl

0.5 M Ca(OH)₂

Required

The concentration

Solution

Molarity from 2 solutions :

Vm Mm = V₁. M₁ + V₂. M₂  

m = mixed solution

V = volume

M = molarity

V = mixed volume  

1 = solution 1

2 = solution 2

Vm = V₁+V₂

Equal volumes⇒V₁=V₂, and Vm = 2V, then equation becomes :

2V.Mm = V(M₁+M₂)

2V.Mm = V(0.5+0.5)

Mm=0.5 M

8 0
3 years ago
The predominant greenhouse gas produced by human use of fossil fuels is __________. View Available Hint(s) The predominant green
mario62 [17]

Answer:

carbon dioxide

Explanation:

Carbon dioxide -

The gas carbon dioxide has a molecular formula of CO₂ ,

During the burning process of the fossil fuels , carbon dioxide is resealed in numerous amount , which act as a greenhouse gas .

Greenhouse gas - Are the gases which absorbs and release radiation , and are responsible for the greenhouse effect .

The greenhouse gases are - carbon dioxide , water vapor , methane , ozone , nitrous oxide .

6 0
2 years ago
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