4amelia is classifying plants in science lab. her teacher describes a plant that has leaves, stems, roots, and that produces fruit. how should amelia classify the plant? a. moss b. non-flowering plant c. fern d. flowering plantamelia is classifying plants in science lab. her teacher describes a plant that has leaves, stems, roots, and that produces fruit. how should amelia classify the plant

D.  flowering plant

Explanation:

Option A is incorrect because moss is a thalloid plant with no true plant body.

Option B is incorrect because the plant could not have produced fruits without flowering.

Option C is incorrect because ferns do not produce fruits.

The correct option is D. Flowering plants produce fruits and posses true leaves, stems and roots. The ovule of the flower becomes the seed after fertilization and the ovary becomes the fruit.

1) 36.70 %; 2) 39.05 %; 3)17.75 %

Step-by-step explanation:

% of element = Mass of element/mass of compound × 100 %

1) N in Mg(CN)₂

The masses of each element are:

1Mg  = 1  × 24.30 = 24.30 u

2C    = 2 × 12.01  = 24.02 u

2N    = 2 × 14.01  = 28.02 u

              TOTAL = 76.34  u

% N = 28.02/76.34 × 100 %

      = 36.70 %

2) K in KHCO₃

The masses of each element are:

1K  = 1 × 39.10    =   39.10   u

1H = 1 ×     1.008 =     1.008 u

1C = 1 ×  12.01     =     2.01   u

3O = 3 ×  16.00   = 48.00   u

           TOTAL    = 100.12    u

% N = 39.10/100.12 × 100 %

      = 39.05 %

3) H in NH₃

The masses of each element are:

1N  = 1 × 14.01   = 14.01   u

3H = 3 ×    1.008 =   3.024 u

                TOTAL   = 17.03   u

% N = 3.024/17.03 × 100 %

        = 17.75 %