<div class ="container">

    <div class ="row">
        <div class="col-sm-1 col-centered">
            <input class="inputtext input_middle" style="outline: medium none;"  name="text_l0" type="text" id="l0" size="7" maxlength="15" />
            <label><select class="cuselText" name="l0">
                <option value="n, mol" selected="selected">n, mol</option>
                <option value="V, l">V, l</option>
                <option value="m, g">m, g</option>
            </select></label>
        <div class="compound"><h3>2H<sub>2</sub></h3></div></div>
        <div class="col-sm-1 col-centered"><div></div>
            <div class="compound"><h3>  +  </h3></div>
        </div>
        <div class="col-sm-1 col-centered">
            <input class="inputtext input_middle" style="outline: medium none;"  name="text_l1" type="text" id="l1" size="7" maxlength="15" />
            <label><select class="cuselText" name="l1">
                <option value="n, mol" selected="selected">n, mol</option>
                <option value="V, l">V, l</option>
                <option value="m, g">m, g</option>
            </select></label>
        <div class="compound"><h3>O<sub>2</sub></h3></div></div>
        <div div class="col-sm-1 col-centered"><div></div>
            <div class="compound"><h3> = </h3></div>
        </div>
        <div class="col-sm-1 col-centered">
            <input class="inputtext input_middle" style="outline: medium none;"  name="text_r0" type="text" id="r0" size="7" maxlength="15" />
            <label><select class="cuselText" name="r0">
                <option value="n, mol" selected="selected">n, mol</option>
                <option value="V, l">V, l</option>
                <option value="m, g">m, g</option>
            </select></label>
        <div class="compound"><h3>2H<sub>2</sub>O</h3></div></div><input type='hidden' name='equation_id' value='5'>
    </div>
</div>