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3 years ago

JWhat type of evidence is gathering information through your senses or using scientific tools?

Chemistry

1 answer:

Ad libitum [116K]3 years ago

8 0

Observations etc etc

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0 / 5 pts Question 3 In the reaction of aluminum with iron III oxide, if you start with 54.2 grams of aluminum, how many grams o

adelina 88 [10]

Could you please mark me as brainliest?

Answer: 160.40 g Fe2O3 are needed.

Explanation:

Balanced equation: 2 Al + Fe2O3 —> Al2O3 + 2Fe

54.2 g Al * 1 mol Al / 26.98 g Al * 1 mol Fe2O3 / 2 mol Al * 159.69 g Fe2O3 / 1 mol = 160.40 g Fe2O3 are needed.

3 0

3 years ago

For the reaction, A(g) + B(g) => AB(g), the rate is 0.385 mol/L.s when the initial concentrations of both A and B are 2.00 mo

Tanya [424]

Answer : The rate for a reaction will be $0.14Ms^{-1}$

Explanation :

The balanced equations will be:

$A(g)+B(g)\rightarrow AB(g)$

In this reaction, $A$ and $B$ are the reactants.

The rate law expression for the reaction is:

$\text{Rate}=k[A]^2[B]^1$

or,

$\text{Rate}=k[A]^2[B]$

Now, calculating the value of 'k' by using any expression.

$\text{Rate}=k[A]^2[B]$

$0.385=k(2.00)^2(2.00)$

$k=0.0481M^{-2}s^{-1}$

Now we have to calculate the initial rate for a reaction that starts with 1.48 M of reagent A and 1.32 M of reagents B.

$\text{Rate}=k[A]^2[B]^0[C]^1$

$\text{Rate}=(0.0481)\times (1.48)^2(1.32)^1$

$\text{Rate}=0.14Ms^{-1}$

Therefore, the rate for a reaction will be $0.14Ms^{-1}$

7 0

4 years ago

What is the relationship between chemical bonds and energy in the body ?

Taya2010 [7]

The body uses energy to break chemical bond(takes energy). When a bond forms, energy is released(like magnet) in the form of Kinetic Energy. Bonds are being broken & formed in your body at the same time(series of chemical reactions).

5 0

3 years ago

What is meant by educational loss?

Vlad1618 [11]

Answer:

when the school or any institition related to education runs the instution in such a way that the institition dosenot get profit is called educational loss

6 0

3 years ago

PLS HELP GIVING 100 PTS EASY SCIENCE HELP PLS

prohojiy [21]

Answer:

B hope it helps

Explanation:

3 0

3 years ago