18 loose plug of cotton wool
dilute hydrochloric acid
.
Db
o a
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magnesium ribbon
Fiqure 6
The word equation for the reaction between magnesium and dilute hydrochloric acid is
magnesium + hydrochloric acid magnesium chloride + hydrogen
The reaction was carried out using the apparatus shown in Figure 6.
A strip of magnesium ribbon was placed in the conical flask.
100 cm3 of dilute hydrochloric acid was added to the conical flask.
The mass of the flask and contents was measured at regular intervals.
The loss in mass was calculated.
Figure 7 shows a graph of the results.
Name the apparatus that could be used to measure out 100 cm3 of dilute hydrochloric acid. *
(1 Point)

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic 

Hydrogen is the most abundant element on the periodic table..hope it .

A) the enthralling of formation for pure element in its standard state is always positivehope this : )