1. B. Calcium is a chemical element that can be found as Ca on the periodic table.
2 A. Heterogeneous mixture. Pizza is not uniform and is a variation of cheese, bread, and toppings that aren't mixed completely together.
3. B. Carbon Monoxide, or CO, is a chemical compound, a combination of 2 or more chemical elements.
Answer:
15 moles of hydrogen gas are needed to react with 15 moles of chlorine gas.
Explanation:
The balanced reaction is:
H₂ (g) + Cl₂ (g) → 2 HCl (g)
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of the compounds participate in the reaction:
- H₂: 1 mole
- Cl₂: 1 mole
- HCl: 2 moles
Then you can apply the following rule of three: If 1 mole of Cl₂ reacts with 1 mole of H₂, 15 moles of Cl₂ with how many moles of H₂ does it react?
moles of H₂= 15
<u><em>15 moles of hydrogen gas are needed to react with 15 moles of chlorine gas.</em></u>
Answer:
heat transfer by thermal energy
Explanation:cause thermal is hot air so heat transfer by thermal
Answer:
Explanation:
In this case, we have to start with the <u>reagents</u>:
The compounds given by the problem are:
-) <u>Nitrogen gas</u> =
-) <u>Water vapor</u> =
-) <u>Aluminum oxide</u> =
Now, we can put the products in the <u>reaction</u>:
When we <u>balance</u> the reaction we will obtain:
Now, for the enthalpy change, we have to find the <u>standard enthalpy values</u>:
With this in mind, if we <u>multiply</u> the number of moles (in the balanced reaction) by the standard enthalpy value, we can calculate the energy of the <u>reagents</u>:
And the <u>products</u>:
Finally, for the total enthalpy we have to <u>subtract</u> products by reagents :
I hope it helps!
2.8 billion miles which can be said as 4.5 billion kilometres
hope this helps x