Answer:
two atoms
Explanation:
In its stable molecular form, oxygen exists as two atoms and is written O2. to distinguish it from an atom of oxygen O, or ozone, a molecule of three oxygen atoms, O3. Even though each of these is all oxygen, combining atoms of the same element may give very different properties to the molecule.
Answer:
2. Na1 +
Explanation:
The formular for sodium fluoride is; NaF
The metal in sodium flouride is sodium.
Sodium belongs to group 1, hence would lose one electron when forming ions.
This is represented as;
Na+
Answer:
B. Green solution density is 1.06 g/ml and blue solution density is 1.20 g/ml
Explanation:
Density is given as,
D = Mass / Volume
Red Solution,
D = 25 g / 25 mL
D = 1 g/mL
Green Solution,
D = 26.5 g / 25 mL
D = 1.06 g/mL
Yellow Solution,
D = 28.2 g / 25 mL
D = 1.128 g/mL
Blue Solution,
D = 30 g / 25 mL
D = 1.20 g/mL
Answer: 100
Explanation:
pH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
a) optimum pH for growing strawberries is 6.5
Putting in the values:
b) optimum pH for growing blueberries is 4.5
Putting in the values:
The ratio of hydrogen ions needed to grow strawberries is to the number needed for blueberries is
Thus the number of hydrogen ions needed to grow strawberries is 100 times the number needed for blueberries.
Answer: A non-covalent interaction differs from a covalent bond in that it does not involve the sharing of electrons, but rather involves more dispersed variations of electromagnetic interactions between molecules or within a molecule. The chemical energy released in the formation of non-covalent interactions is typically on the order of 1–5 kcal/mol (1000–5000 calories per 6.02 × 10 molecules).
Explanation: