Calculate the mass of 12.044x10^23 atoms of calcium

Answer:

The definition of conceptual is something having to do with the mind, or with mental concepts or philosophical or imaginary ideas. An example of conceptual is when you formulate an abstract philosophy to explain the world which cannot be proven or seen. "Conceptual."

Explanation:

Answer:

\(5H_2O+C_5H_{10}O_5\rightarrow 5CO_2+20H^++20e^-\)

Explanation:

Hello.

In this case, when ribose (C₅H₁₀O₅) yields carbon dioxide (CO₂) we write:

\(C_5H_{10}O_5\rightarrow CO_2\)

Which needs to be balanced by adding water and hydrogen ions:

\(5H_2O+C_5H_{10}O_5\rightarrow 5CO_2+20H^++20e^-\)

You can also see that there are 20 transferred electrons, since the carbon atoms in the ribose have 0 as their oxidation state and the carbon atoms in the carbon dioxide have +4 as the oxidation state, thus, each carbon transfers  4 electrons, a five carbon atoms transfer 20 electrons overall.

In such a way, since the carbon is increasing its oxidation state, such half reaction is an oxidation half reaction.

Best regards.

Answer:

snovd vosb r

Explanation:

According to the  stoichiometry and the given balanced chemical equation 89.22 g of barium chloride are needed to make 100 grams of barium sulfate.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

In the given chemical equation, 208.23 g of barium chloride produces 233.38 g of barium sulfate ,so for 100 g of barium sulfate 208.23×100/233.38 =89.22 g of barium chloride is required.

Thus, 89.22 g of barium chloride are needed to make 100 grams of barium sulfate.

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Answer:

$13,500

Explanation:

The differential analysis of the proposal to replace the commercial oven is shown below:-  

The Total differential decrease in cost = Annual maintenance cost reduction × Number of years applicable

= $23,000 × 5

= $115,000  

Inflow cash = The Total differential decrease in cost + Proceeds from sale of equipment

= 115,000 + $8,500

= $123,500

The Net differential decrease in cost from replacing equipment = Inflow cash - Cost of new equipment

= $123,500 - $110,000

= $13,500

Question 1: Which mixtures can be separated by magnet?

Answers: The safety pins and sand mixture; The thumb tacks and sand mix.

Reason: The magnet pulls on the metal to help pull it apart from the nonmetal item such a sand or sugar.

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Question 2: Which mix cannot be separated by magnet?

Answers: Sand and sugar mix; safety pins and thumb tacks mix

Reason: For the sand and sugar mix, there isn't any metal to pull on. These particles will stay where they are. In contrast, the safety pins and thumb tacks are both metal (or have both have metal parts) so they will be pulled on equally. There isn't a difference like in problem 1 which allows for the separation to happen. We need a metal vs nonmetal mix so that we can pull out the metal with the magnet. More specifically, the metal must be magnetic or be able to be affected by a magnet. We consider this type of material ferromagnetic. Unfortunately some metals aren't able to be magnetized, but I'm assuming that your teacher is referring to magnetic metals for the safety pins and thumb tacks.

===================================================

Question 3: How do you classify materials not attracted to a magnet?

Answer: We consider them to be non-ferromagnetic materials

The term "ferro" refers to "iron" which is a very magnetic material. The ancients knew that iron had this property as this material is fairly easily discovered in the earth. Some metals don't have this magnetic property and a magnet will not affect it.

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Question 4: How do you classify materials attracted to a magnet?

Answer: Any ferromagnetic material (eg: iron or steel)

Reason: Refer to problem 3

===================================================

Question 5: How are the mixtures separated?

Answer: The magnet pulls on the ferromagnetic material to separate it from the nonferromagnetic material.

Refer back to the previous questions for more info.

Answer:

Possible reasons why EA, or electronegativity, is a positive quantity for oxygen atom include:

Explanation:

The bond C-C has a higher energy than C-N because the bond C-N has 1 more unpaired electron than C-C, and unpaired electrons produce repulsion which alters the energy reducing it.

The bond C-F is the stongest because the F atom is very small, also has a very strong electronegativity and has no unpaired electrons so that makes it more stable.

The unpaired electrons in N atom, are those up and down the N atom.

Answer: Where is the folowing?

Explanation:

Answer:

i need help with that too

Explanation:

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Answer:

they show fracture lines shown in geological maps

Explanation:

hope this helps

Answer:

the elements in a group have similar electron configurations, an elements electron configuration determines its chemical properties, therefore members of a group in the periodic table have similar chemical properties. ... These metals have a single valence electron and are extremely reactive.

Explanation:

Answer:

Because they all have one or more atoms of the same type material

Explanation:

Answer:

umm i am not sure i really understand the question but uranium has the highest number of Protons. It has a total of 92 protons. And if that doesn't work than the Atomic number should tell the number of protons are in the element

Explanation:

\(\\ \rm\longmapsto Density=\dfrac{Mass}{Volume}\)

\(\\ \rm\longmapsto Density=\dfrac{5000}{50}\)

\(\\ \rm\longmapsto Density=100g/cm^3\)

Answer:

the answer woul be 89 if you do the math right

Explanation:

Answer:

When oceanic lithosphere and continental lithosphere collide, the dense oceanic lithosphere subducts beneath the less dense continental lithosphere.

Explanation:

Hope this helped Mark BRAINLEST!!!

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

b or c but I would just pick c

Answer:

C

Explanation:

Sun is an energy source not a matter.

The society with the least negative effects on the environment is probably the one with a small population, traditional farming methods, no access to contemporary technology, and self-sufficient food production.

This is due to the fact that their way of living is less dependent on modern infrastructure and technology, both of which have a negative impact on the environment. Additionally, their agricultural methods are probably more environmentally friendly and sustainable.

The environmental effects of the other societies on the list would all be greater. Because of the use of fossil fuels and the production of products that require a lot of resources, a big, industrialized society with high levels of consumption would have a significant carbon footprint.

It would still take a lot of resources to maintain its infrastructure and create products in a less populous, highly industrialized society with moderate consumption levels, which would have a negative effect on the environment.

Given that the size of the population alone would necessitate significant resource consumption and infrastructure development, a big population with moderate industrialization and consumption levels would also have a big effect on the environment.

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Answer:

The element potassium forms a cation with the charge +1 . The symbol for this ion is K⁺, and the name is potassium ion. The number of electrons in this ion is 18.

Explanation:

Potassium is a metal. It belongs to the group 1 elements. Metals form cations by losing electrons. Since potassium is a group element, it forms a cation by losing one electron. The charge it has is +1 due to the excess of the protons compared t the electrons by 1.

Potassium has  19 electrons. Potassium io on the other hand has 19-1 = 18 electrons.

Step 1

The reaction must be completed and balanced:

4NH3 (g) + 9O2 (g) => 4NO3 + 6H2O (g)

Reactants: NH3 and O2

Products: NO3 and H2O

--------------------

Step 2

Information provided:

STP conditions, therefore:

1 mole of gas (NH3 in this case) = 22.4 L (volume)

5.3 g of O2

Liters => L

Grams => g

---------

Information needed:

The molar mass of O2 = 32.0 g/mol

-------------------

Step 3

By stoichiometry,

1 mole NH3 = 22.4 L NH3

1 mole O2 = 32.0 g O2

Procedure: We will work with volume and mass

4NH3 (g) + 9O2 (g) => 4NO3 + 6H2O (g)

4 x 22.4 L NH3 ---------- 9 x 32.0 g O2

X ----------- 5.3 g O2

X = 5.3 g O2 x 4 x 22.4 L NH3/9 x 32.0 g O2 = 1.65 L approx.

Answer: 1.65 L of NH3

When 7.524 is rounded to 3 significant figures, it will be 7.52.

The process of changing a number to a nearby number with fewer significant digits is known as rounding.

Rounding can be done to the nearest integer, the nearest tenth, the nearest hundredth, and so on.

Here are some pointers on rounding numbers to a certain number of significant digits:If the digit following the last significant digit is less than 5, simply drop it and all following digits.

(round down)For example, 2.832 rounded to two significant digits is 2.8 since the 3 is followed by a 2 which is less than 5.

If the digit following the last significant digit is greater than 5, add 1 to the last significant digit, then drop all of the digits that follow it.

(round up)For example, 4.673 rounded to two significant digits is 4.7 since the 3 is followed by a 7 which is greater than 5.

If the digit following the last significant digit is exactly 5, the preceding digit is odd, and no other digits follow, increase the last significant digit by 1.

If the digit following the last significant digit is exactly 5, the preceding digit is even, and no other digits follow, simply leave the last significant digit alone.

For example, 2.875 rounded to two significant digits is 2.9 since the 5 is followed by an odd number, which means that the 8 should be rounded up, while 2.765 rounded to two significant digits is 2.8 since the 5 is followed by an even number, which means that the 6 should be left alone.

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Answer:

Answer : C Molecule, Pure Element

Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

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Answer:

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Explanation:

5 puntos gratis pa

Answer:

stratosphere

Explanation:

Answer:

A 03

Explanation:

jammer as verkeerd

Ek is nog steeds 'n beginner