For the reaction na + h2o → naoh + h2, what are the reactants, products, and correct coefficients in the balanced equation?

2Na + 2H2O -> 2NaOH + H2

To balance the equation, set up a chart as instructed:

On the left side, have the reactants with their starting amounts. On the left side, do the same with the products. Here, you should realize that Hydrogen has the odd number of 3. In order to make this an even number, add the coefficient of 2 to NaOH in order to get the new amounts.

Now that the products have even numbers, balance it on the reactants side. Take H2O and give it the coefficient of 2. This will give you four hydrogen and two oxygen. You now need to balance Sodium, and this can be done simply by adding the coefficient of 2 to the lone element.

Hope this helps!

Reactants: 2Na and 2H2O; products: 2NaOH and 1H2

Explanation:

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.