Can you make an ionic compound with two positive ions? Explain.

1 answer:

8 0

A proper ionic formula has a cation and an anion in it; an ionic compound is never formed between two cations only or two anions only. The key to writing proper ionic formulas is simple: the total positive charge must balance the total negative charge.

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Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. How many grams of hydrogen are needed to react completely

kondor19780726 [428]

Explanation: Number of moles of water = mass of water/ molar mass.

Molar mass of H2O = (1*2) + 16 = 18.0

Now we only need to calculate the number of moles of water.

The chemical reaction is as follows

CH4 + 2O2 ---> CO2 + 2H2O

From the eqn, the moles of H2O = 2*moles of CH4

Molar mass of CH4 = 12 + 4 = 16. Number of moles of methane = mass/

molar mass. No of moles = 6.4/16 = 0.4. So the number of mole of water = 2* 0.4 = 0.8. We already calculate its molar mass earlier. So mass of water = molar mass * number of moles = 18 * 0.8 = 14.4

7 0

3 years ago

Approximately how many ice cubes must melt to cool 650 milliliters of water from 29°C to 0°C? Assume that each ice cube contains

qwelly [4]

Answer : The number of ice cubes melt must be, 13

Explanation :

First we have to calculate the mass of water.

$\text{Mass of water}=\text{Density of water}\times \text{Volume of water}$