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Agata [3.3K]
3 years ago
14

Help ASAP will give brainilest

Chemistry
2 answers:
fiasKO [112]3 years ago
5 0

Q is the heat added to the system.

yarga [219]3 years ago
3 0

The answer is the last one

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Which of the following is an element?
sergejj [24]
A.) Zinc (Zn) is a metal
5 0
4 years ago
Read 2 more answers
How many grams of carbon dioxide will form if 5.5 g of C3H8 burns in 15 g of O2?
mr Goodwill [35]
C3H8+3O2--->3CO2+8H
Therefore for every 1:3 there are 3 Carbon dioxides that form. That means find the limiting reactant from the two reactants.
5.5g(1mole C3H8/44.03g of C3H8)=0.1249 moled of C3H8 and if for every one C3H8 we can form three CO2. We can assume 0.3747 miles of CO2 will be produced.
15g of O2(1 mole O2/32g of O2)=0.4685moles O2 and if for every three O2 we can produce three CO2 we may assume a 1:1 ratio.
This means C3H8 will be your limiting reactant. Therefore 0.3747 moles of CO2 will be produced.
0.3747 moles of CO2(48.01 g of CO2/1 mole of CO2)= 17.99 grams of CO2
5 0
4 years ago
A student with a body temperature of 37°C holds a piece of ice that has a temperature of –8°C.
Andrei [34K]

Answer:

B

Explanation:

Heat moves as thermal energy from hot body to a cold body

don't forget to rate answer

8 0
3 years ago
using details and examples from the text explain how the digestive system helps your body obtain the energy it needs​
vlabodo [156]

Answer:

                                         

Explanation:

3 0
3 years ago
Which equation represents a neutralization reaction?
Law Incorporation [45]

3. Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2 H₂O represents a neutralization reaction.

<u>Explanation:</u>

Neutralization reaction is a reaction in which an acid reacts with a base to form a slat and water.

First reaction is the decomposition reaction in which the reactant is decomposed to form 2 or more products.

Second one is the combustion reaction in which methane is burnt in presence of oxygen.

Third one is the Neutralization reaction, in which calcium hydroxide (base) reacts with sulfuric acid (acid) to form a (salt) calcium sulfate and water.

Fourth reaction is nothing but the double displacement reaction in which the ions exchanged their positions there by forming two new products.

7 0
4 years ago
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