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4 years ago

Reactions eventually stop. What is generally the reason for this?

Chemistry

1 answer:

Rina8888 [55]4 years ago

4 0

Reactions eventually stop. Generally the reason for this :

C. One or more of the reactants has been used up.

Explanation:

A reaction is an action taken in response to something. If you're telling your parents that you want to move out, you'll see by their reaction that they're sad about it. A reaction is often a physical in nature.
A chemical reaction describes the way a chemical behaves when combined with another substance.
Reactants are substances initially present in a chemical reaction that are consumed during the reaction to make products. Some chemical reactions go to completion, resulting in all of the reactants becoming products. These reactions are said to be irreversible.
All chemical reactions involve both reactants and products. Reactants are substances that start a chemical reaction, and products are substances that are produced in the reaction
For example, burning methane in oxygen is irreversible.
In a chemical reaction, reactants that are not used up when the reaction is finished are called excess reagents.

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According to this chemical equation which molecules represeny the products 4fe+3O->2fe2O3 A iron B iron and oxygen C iron oxi

svet-max [94.6K]

Answer: C. iron oxide

Explanation:

In a chemical reaction , the reactants are written on the left hand side followed by a rightarrow and then products are given on the right side of the arrow.

In the given chemical equation :

$4Fe+3O_2\rightarrow 2Fe_2O_3$

Reactants are iron (Fe) and oxygen $(O_2)$ and product is iron oxide $(Fe_2O_3)$ .

8 0

3 years ago

If it takes 7,529 calories of heat to warm 750.0 grams of water, what was the temperature change? The specific heat of water in

Zigmanuir [339]

Answer:

The temperature change was 10.04 °C.

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system. In this way, there is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:

Q = c * m * ΔT

Where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case you know:

Q= 7,529 calories (cal)

c= 1 $\frac{cal}{g*C}$

M=750 grams

Replacing:

7,529 cal= 1 $\frac{cal}{g*C}$ *750 g* ΔT

Solving you get:

ΔT= $\frac{7,529 cal}{1 \frac{cal}{g*C}*750 g }$

ΔT= 10.04 °C

So, the temperature change was 10.04 °C.

6 0

3 years ago

Read 2 more answers

When the equation below is balanced with the smallest possible integer coefficients, what is the coefficient for PH3?

Vikki [24]

Answer:

The coefficient for PH3 is 8. Option D is correct.

Explanation:

Step 1: The unbalanced equation

P2H4(g) ⇆ PH3(g) + P4(s)

Step 2: Balancing the equation

P2H4(g) ⇆ PH3(g) + P4(s)

On the left side we have 4x H (in P2H4), on the right side we have 3x H (in PH3). To balance the amount of H on both sides, we have to multiply P2H4 on the left side by 3 and PH3 on the right by 4.

3P2H4(g ) ⇆ 4PH3(g) + P4(s)

On the left side we have 6x P (in 3P2H4) on the right side we have 8x P (4x in 4PH3 and 4x in P4). To balance the amount of P on bot hsides, we have to multiply 3P2H4 by 2 and 4PH3 also by 2. Now the equation is balanced

6P2H4(g ) ⇆ 8PH3(g) + P4(s)

The coefficient for PH3 is 8. Option D is correct.

5 0

4 years ago

Select the correct answer.

sergey [27]

I believe the correct answer is B

8 0

3 years ago

Barium (Ba) is an alkaline earth metal. t or f

tatiyna

Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element. Thanks and I hope it helped.

8 0

4 years ago