Chemistry High School

Make the following conversion.

60 dkm = _____ km

6,000
0.060
60,000
0.60

Answers

Answer 1

Answer:

0.6

Explanation:

Related Questions

HELP ME PLEASE!!

Density (D) is defined by mass/volume .

Which item increases as heat is applied?

D
m
V

Answers

Answer:

volume

Explanation:

things expand when heat is applied taking up more space hence volume

Calculate the mass in grams of carbon dioxide produced from 11.2 g of octane (C8H18) in the reaction above.

18 + 25 O2 --> 16 CO2 + 18 H2O


89.6 g
17.3 g
34.5 g
46.2 g

Answers

Answer:

34.6g

Explanation:

Given parameters:

Mass of Octane  = 11.2g

  Reaction expression;

      2C₈H₁₈  + 25O₂  →  16CO₂  + 18H₂O

Mass of octane = 11.2g

Unknown:

Mass of carbon dioxide produced  = ?

Solution:

From the balanced reaction equation;

         2 mole of octane produced 16 moles of carbon dioxide

From the given specie, let us find the number of moles;

    Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

 Molar mass of C₈H₁₈   = 8(12) + 18(1) = 114g/mole

Number of moles of octane  = [tex]\frac{11.2}{114}[/tex]   = 0.098mole

   

    2 mole of octane produced 16 moles of carbon dioxide

    0.098 mole of octane will produce [tex]\frac{0.098 x 16}{2}[/tex]   = 0.79mole of CO₂

Mass of CO₂ = number of moles x molar mass

           Molar mass of CO₂ = 12 + 2(16)  = 44g/mol

Mass of CO₂  = 0.79 x 44  = 34.6g

Metal oxides are in which state?

Answers

Answer:

Metal oxides are crystalline solids that contain a metal cation and an oxide anion. They typically react with water to form bases or with acids to form salts.

Explanation:

Hope this helps!

What is the difference between the chemical symbols CI and Cl2?

Answers

Cl refer to chlorine atoms. They don't exist naturally in that form. Rather, Cl2 refer to chlorine molecules, and they exist as that form in nature.

Over 30 species of dinosaur fossils with feathers have been discovered. Therefore, birds evolved from dinosaurs.

A.) Claim
B.) Evidence
C.) Reasoning

Answers

The awnser is C because if it was a claim it would be proven with facts and if it were evidence it would also be proven with facts

The melting point of table salt is 801.Is this a physical or chemical property

Answers

Physical property
Physical properties include density, harness, color, melting and boiling points

Answer:

Physical

Explanation:

When something melts it is still the same substance.

For example:

Ice and water are still both water, so that would be a physical change.

If a reaction changes the substance into a new/different substance then it is a chemical change.

Please help me with this question. What are two elements that will react similarly to beryllium ?

Answers

Probably the two elements with properties most like beryllium are magnesium and aluminum.

According to the electronic configuration elements that will react similarly to beryllium  are magnesium and calcium.

What is electronic configuration?

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

Learn more about electronic configuration,here:

https://brainly.com/question/29757010

#SPJ6

If you have 1.26 x 1024 molecules, how many moles do you have?

Answers

Answer:

2.09 moles

Explanation:

1 mole=6.022*10^23 moles --> 1.26×10^(24)/(6.022*10^23)=2.09 moles

HELP AND ILL PUT U ON BRAINLIEST ! -THANKS

Answers

Answer:

2Fe₂O₃

Explanation:

If the number of atoms of each element are the same on reactant and product sides, it is a balanced equation. This is not a balanced equation because the number of atoms of each element are not the same on reactant and product sides.

To balance an equation, let's first list the atoms:

FeO

Then, we count the number of atoms on both sides:

1 Fe 22 O 3

We multiply the number of atoms for each element on either side by the number of molecules (aka coefficient, or "big number"):

4 Fe 26 O 3

To balance the equation, we need the total number for Fe on the right side to be 4, and the total number for O on the right side to be 6. We can do that by adding a "big number", or coefficient in front, which when multiplied by the number of atoms for each element, makes a balanced equation.

2 is a good value: 2 × 2 = 4, and 2 × 3 = 6.

As such:

4Fe + 3O₂ → 2Fe₂O₃

What factors do you think should be considered in selecting a metal to use to reclaim copper? Which factor do you think is the most important? Explain.

Answers

Answer:

Aluminum

Explanation:

Aluminum would be the best choice to reuse  copper from the copper chloride solution because it  In the aluminum–copper reaction, the chloride ions help remove the aluminum oxide coating so that a reaction can take place through the oxidation of aluminum and the reduction of copper ions.The aluminum–copper chloride reaction is a simplified version of a waste reclamation and reduction strategy for handling toxic-waste materials.

What describes using organisms that were only alive during a specific time period to estimate the unknown age of items

A radioactive dating
B law of superposition
C relative dating
D index fossil

Answers

Answer:

c i just took the test

Explanation:

Will give 50 points, If a decrease in temperature accompanies a reaction, what occurred?


Energy was released.


Energy was destroyed.


Energy was created.


Energy was absorbed.

Answers

Answer:

A.

Explanation:

Answer: Energy is Being absorbed

Using your knowledge of symbols, determine which compound listed must contain both copper and oxygen.

1. malachite, Cu 2CO 3(OH) 2
2. calcite, CaCO 3
3. glucose, C 6H 12O 6
4. chalcopyrite, CuFeS 2

Answers

Answer:

The correct option is Malachite which has both copper nd oxygen.

Explanation:

As we the symbol of copper is Cu while the symbols of oxygen is O. As the chemical formula of malachite is Cu₂CO₃(OH)₂. So it has Cu as well as O.

Glucose has only oxygen but no copper

Chalcopyrite has copper but no oxygen

Calcite has oxygen but no copper.

So correct answer is only malachite.

pls give brainlist

how many atoms are there in a 1 mol sample of water

Answers

Answer:

Explanation:

1 molecule has 2 hydrogens and 1 oxygen. That's 3 atoms.

1 mol of anything is 6.02 * 10^23 items. There are 3 atoms in 1 molecule

There are 6.02*10^23 * 3 atoms in a mol of water

Answer: 1.804 * 10^24 atoms in a mol of water.

I have similar chemical and physical properties to calcium but my molecular mass is lower, what element am I?
-Potassium
-Scandium
-Magnesium
-Strontium

Answers

Potassium is the answer
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