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3 years ago

The diagram below shows different layers of sedimentary rocks.

Chemistry

2 answers:

timofeeve [1]3 years ago

3 0

D. layer B is younger than layer G.

zaharov [31]3 years ago

3 0

Answer:

The correct answer is D.

Layer B is younger than layer G

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What are atoms help

Savatey [412]

a b c d no a no b yes c no d ok

8 0

3 years ago

an aqeous solution of oxalic acid h2c2o4 was prepared by dissolving a 0.5842g of solute in enough water to make a 100 ml solutio

vampirchik [111]

The question is incomplete, here is the complete question:

An aqeous solution of oxalic acid was prepared by dissolving a 0.5842 g of solute in enough water to make a 100 ml solution a 10 ml aliquot of this solution was then transferred to a volumetric flask and diluted to a final volume of 250 ml. How many grams of oxalic acid are in 100. mL of the final solution?

<u>Answer:</u> The mass of oxalic acid in final solution is 0.0234 grams

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$ ......(1)

Given mass of oxalic acid = 0.5842 g

Molar mass of oxalic acid = 90 g/mol

Volume of solution = 100 mL

Putting values in equation 1, we get:

$\text{Molarity of oxalic acid solution}=\frac{0.5842\times 1000}{90\times 100}\\\\\text{Molarity of oxalic acid solution}=0.0649M$

To calculate the molarity of the diluted solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the concentrated oxalic acid solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted oxalic acid solution

We are given:

$M_1=0.0649M\\V_1=10mL\\M_2=?M\\V_2=250.0mL$

Putting values in above equation, we get:

$0.0649\times 10=M_2\times 250.0\\\\M_2=\frac{0.0649\times 10}{250}=0.0026M$

Now, calculating the mass of glucose by using equation 1, we get:

Molarity of oxalic acid solution = 0.0026 M

Molar mass of oxalic acid = 90 g/mol

Volume of solution = 100 mL

Putting values in equation 1, we get:

$0.0026=\frac{\text{Mass of oxalic acid solution}\times 1000}{90\times 100}\\\\\text{Mass of oxalic acid solution}=\frac{0.0026\times 90\times 100}{1000}=0.0234g$

Hence, the mass of oxalic acid in final solution is 0.0234 grams

6 0

4 years ago

Platinum is used to catalyze the hydrogenation of ethylene: H2(g)+CH2CH2(g)−⟶Pt(s)CH3CH3(g)H2(g)+CH2CH2(g)−⟶Pt(s)CH3CH3(g) Chlor

Dafna1 [17]

Explanation:

Homogeneous catalysis refers to catalytic reactions where the catalyst is in the same phase as the reactants.

Heterogeneous catalysis is the type of catalysis where the phase of the catalyst differs from the phase of the reactants or products.

Platinum is used to catalyze the hydrogenation of ethylene:

H2(g)+CH2CH2(g)− ⟶ Pt(s) CH3CH3(g)

In this reaction, the platinum is in the solid state. While the other species (reactants and products) are in their gaseous state.

This reaction is Heterogenous catalysis.

Chlorofluorocarbons (CFCs) catalyze the conversion of ozone (O3O3) to oxygen gas (O2O2):

2O3(g)− ⟶ CFC(g) 3O2(g)

The catalyst is in the same gaseous state as the reactant and product.

This reaction is Homogenous catalysis.

Magnesium catalyzes the disproportionation of hydrogen peroxide to produce water and oxygen:

2H2O2(aq)− ⟶ Mg(s) 2H2O(l) + O2(g)

In this reaction, the Magnesium is in the solid state. While the other species (reactants and products) are in their gaseous state.

This reaction is Heterogenous catalysis.

4 0

4 years ago

What is the acceleration of a 5 kg mass pushed by a 10 N force?

Olin [163]

Answer:

Here the force is 10N and the mass is 5 kg. Dividing both sides by 5kg, we get a = 2 m/s^2.

5 0

3 years ago

Which of the following statements is incorrect?

yarga [219]

The correct option is D.
Mole is a measurement used in chemistry which allows us to measure out the same quantity of matter in different substances. Mole allows scientist to measure two substances, for instance, magnesium and sodium, which have equal amount of atoms. Thus, a mole of magnesium contains the same number of atoms as a mole of sodium.

4 0

3 years ago