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N76 [4]
3 years ago
15

Can someone solve c and d? ​

Chemistry
1 answer:
tangare [24]3 years ago
7 0

Answer:

Na + + e - → Na.

Pb 2+ + 2e - → Pb.

2H + + 2e - → H 2

Explanation:

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For the most effective hot pack, should the Temperature change be positive or negative ?
bazaltina [42]

Answer:

Positive

Explanation:

For the most effective hot pack, the temperature change should be <u>positive</u>.

<em>Hot packs are generally utilized for their heat-producing abilities. Hence, the reactions leading to the activation of hot packs are usually exothermic, that is, heat energy generating. In other words, positive or increased temperatures must be generated when hot packs are activated.</em>

This is unlike cold packs which are utilized for the cold-generating abilities. Reactions leading to their activations must be endothermic, that is, heat-absorbing.

3 0
4 years ago
What's a good idea for a limiting reactant project
amid [387]
Original Recipe
1 (18 1/4 ounce) Box devils food cake mix
1/2 cup vegetable oil
2 large eggs
Confectioners' Sugar (for rolling)

Directions:
Preheat oven to 350 degrees. Stir (by hand) cake mix, oil, and eggs- until dough forms. Dust with sugar and shape into 1 inch balls. Roll balls in sugar and place on ungreased cookie sheet. Bake 8-10 minutes. Remove from pan after one minute and put on cooling rack.
Cooking for 17 people
My original yield was 30 cookies.

17 cookies (1box cake mix/30 cookies)= .56 of a box= 1/2 box

17 cookies (1/2 cup oil/30 cookies)= .283 cups of oil= 1/4 cups

17 cookies (2 eggs/30 cookies)= 1.13 eggs= 1 egg
Percent Yeild
I was able to bake 24 cookies, with my original yeild being 30.


(24 cookies/30 cookies) x 100= 80% yeild
<span>Limiting Reactant Project
Fudge Crinkles</span>
By Autumn Gordon
Limiting Reactant
I have...
1 box of cake mix
48 oz or 6 cups of oil
12 eggs
Limiting is cake mix.
Left over is...
5.5 cups of oil
10 eggs<span>
</span>
7 0
3 years ago
A solar panel combines multiple photovoltaic cells. Which type of energy is used to power a solar panel?
Softa [21]

Explanation:

<u>Photovoltaic means electricity from light</u>

photo = <em>light </em> voltaic = <em>electricity</em><em> </em>

<u>SUNLIGHT</u> is the answer

Hope this is correct

HAVE A GOOD DAY!

3 0
3 years ago
Read 2 more answers
An atom can absorb any amount of energy to become excited. True False
lora16 [44]
The correct answer would be false

Hope this helped! ☺
6 0
3 years ago
How do you determine the charges on the ions in an ionic compound?
Hitman42 [59]

Answer:

To find the ionic charge of an element you'll need to consult your Periodic Table. On the Periodic Table metals (found on the left of the table) will be positive. Non-metals (found on the right) will be negative.

Explanation:

3 0
3 years ago
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