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olganol [36]
3 years ago
14

HELPPPPP PLEASE

Chemistry
1 answer:
andreyandreev [35.5K]3 years ago
7 0

Answer:

V=1.18 L

Explanation:

Alternative solution:

Calculate how many moles

2.34

g

C

O

2

is

2.34

g

⋅

1

m

o

l

44

g

C

O

2

=

0.053

m

o

l

Simple mole ratios tell us that

1

mol of any gas at STP is

22.4

L

, but since we only have

0.053

m

o

l

, we times

22.4

L

m

o

l

by

0.053

m

o

l

.

22.4

L

m

o

l

⋅

0.053

m

o

l

=

1.18

L

Answer link

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Answer:

Associative Evidence

Explanation:

According to the authors, the most effective means of developing associative evidence are instrumental chemistry, microscopy, photomacrography, other optical methods, and morphology. It is used to provide the link between and evidence and individual involved in a crime.

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a 1.25g sample of ore containing iron pyrite (FeS2) was pulverized and ignited in air, converting the FeS2 to Fe2O3 and SO2(g).
svp [43]

Answer:

28.9%

Explanation:

Let's consider the following balanced equation.

2 FeS₂ + 11/2 O₂ ⇒ Fe₂O₃ + 4 SO₂

We can establish the following relations:

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The amount of Fe in the sample that produced 0.516 g of Fe₂O₃ is:

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Answer:

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Explanation:

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Its atomic mass is 75 amu.

Its symbol is As.

It is usually present in combine with sulfur and metals.

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It is also used for hardening.

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As₃₃ = Is² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p³

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As₃₃ = [Ar] 3d¹⁰ 4s² 4p³

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babymother [125]

Answer:

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Explanation:

The pH of any solution , helps to determine the acidic strength of the solution ,

i.e. ,

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and ,

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pH is given as the negative log of the concentration of H⁺ ions ,

hence ,

pH = - log H⁺

From the question ,

the concentration of the solution is 0.0042 M , and being it a strong acid , dissociates completely to its respective ions ,

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Hence , using the above equation , the value of pH can be calculated as follows -

pH = - log H⁺

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