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3 years ago

How many O atoms are in 7.39 g CO2?

Chemistry

2 answers:

Rama09 [41]3 years ago

8 0

Explanation:

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yanalaym [24]3 years ago

6 0

Answer:

3ml of CO2

Explanation:

There are 3ml of CO2 in such a mass. Thus there are 6×NA individual oxygen atoms

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The following data was collected for the formation of ammonia (NH3) based on the following overall reaction: N2 + 3H2 = 2NH3 N2

notsponge [240]

Answer : The unit for the rate constant in the rate law for the formation of ammonia is, $M^{-2}min^{-1}$

Explanation :

Rate law is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.

For the given chemical equation:

$N_2+3H_2\rightarrow 2NH_3$

Rate law expression for the reaction:

$\text{Rate}=k[N_2]^a[H_2]^b$

where,

a = order with respect to $N_2$

b = order with respect to $H_2$

Expression for rate law for first observation:

$0.0021=k(0.10)^a(0.10)^b$ ....(1)

Expression for rate law for second observation:

$0.0084=k(0.10)^a(0.20)^b$ ....(2)

Expression for rate law for third observation:

$0.0672=k(0.20)^a(0.40)^b$ ....(3)

Dividing 2 by 1, we get:

$\frac{0.0084}{0.0021}=\frac{k(0.10)^a(0.20)^b}{k(0.10)^a(0.10)^b}\\\\4=2^b\\b=2$

Dividing 3 by 1 and also put value of b, we get:

$\frac{0.0672}{0.0021}=\frac{k(0.20)^a(0.40)^2}{k(0.10)^a(0.10)^2}\\\\2=2^a\\a=1$

Thus, the rate law becomes:

$\text{Rate}=k[N_2]^a[H_2]^b$

$\text{Rate}=k[N_2]^1[H_2]^2$

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

$0.0021=k(0.10)^1(0.10)^2$

$k=2.1M^{-2}min^{-1}$

The value of the rate constant 'k' for this reaction is $2.1M^{-2}min^{-1}$

That means, the unit for the rate constant in the rate law for the formation of ammonia is, $M^{-2}min^{-1}$

7 0

4 years ago

Describe how you could show that an alkaline solution is formed when caesium reacts with water

igor_vitrenko [27]

After reacting, place a red moist litmus paper into the final solution and the litmus paper will turn blue. This indicates that the solution is alkaline.
Alternative methods
Using universal indicator
using phenophtalein
using bromothyl blue
using methyl orange
use pH probe connected to a data logger

3 0

3 years ago

What is the chemical formula of calcium hydroxide?

Elanso [62]

Ca(OH)2 because Calcium tends to favor a positive 2 charge and OH tensd to favor a negative 1 charge.

5 0

3 years ago

Read 2 more answers

g What is the mass ratio for CaCl2 if a sample analyzed to be 36.1 grams calcium and 63.9 grams chlorine

Kitty [74]

Answer:

$0.361Ca\\\\ 0.639Cl$

Explanation:

Hello!

In this case, since the mass ratio here can be computed as:

$\frac{mass\ Ca}{mass\ CaCl_2} \\\\\frac{mass\ Cl}{mass\ CaCl_2}$

For each element forming the compound we obtain:

$\frac{36.1g}{63.9g+36.1g} = 0.361Ca\\\\\frac{63.9g}{63.9g+36.1g} = 0.639Cl$

Best regards!

7 0

3 years ago

The sun is located in the center of our solar system. Where is the sun located in our disc-shaped

ANEK [815]

*Answer:-*

The sun is about 1/3 the distance from the center of the Milky Way galaxy to its outer edges. It's located in a smaller spiral arm, between two large arms, called the Orion Arm.

6 0

3 years ago