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alexandr402 [8]
1 year ago
12

Ted and Emily played a mixed doubles tennis match against Jack and Brenda. In the second match, Ted and Brenda played against Ja

ck and Emily. Which type of chemical reaction does the situation demonstrate? Synthesis reaction Single replacement Double replacement Decomposition reaction
Chemistry
1 answer:
timofeeve [1]1 year ago
8 0

Answer:

Double replacement.

Explanation:

Chemical Reactions => Double Replacement Reactions.

Let's call Ted as T, Emily as E, Jack as J, and Brenda as B.

In the first match, we have T and E playing against J and B; and in the second match, we have T and B playing against J and E. We can state a 'reaction' of this if the first match would be the reactants and the second match the products:

TE+JB\rightarrow TB+JE.

You can note that this is similar to a double replacement reaction, remember that a double-replacement reaction is a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds. The general form of a double-replacement reaction is:

AB+CD\rightarrow AD+BC,

which is similar to the reaction of the game, so the answer would be Double replacement.

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Which of the following will increase polymer strain to failure
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increase Polymer strain to failure is given below.

Explanation:

  • Strain to failure gives the measure of how much the specimen is elongated to failure. By this it means that, it you have strain to failure of 3% measured in specimen of length 100 mm, the material will fail when it it elongated 3 mm, as experimented in tensile test. Therefore, for a material with higher strain to failure rate, the ductility is higher and tensile strength is lower.

  • Tensile strength means the maximum mechanical stress (i.e. applied force divided by (initial) cross-section area of the specimen tested) during a tensile test, which is not directly correlated to the deformability or strain at failure or break since the tensile strength also is affected by the stiffness of the material. Therefore a ductile material might deform on a lower mechanical stress level than a stiffer one (this is the usual case), meaning its tensile strength is lower although its deformability is higher.
  • Therefore, for a material with higher strain to failure rate, the ductility is higher and tensile strength is lower.

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Is a homomonocyclic compound?
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Explanation:

A homomonocyclic compound composed of eight sulfur atoms. ...

8 0
3 years ago
The temperature of a sample of silver increased by 23.8 °C
PIT_PIT [208]

Answer:

46.67 g

Explanation:

From the question given above, the following data were obtained:

Change in temperature (ΔT) = 23.8 °C

Heat (Q) = 261 J

Specific heat capacity (C) of silver = 0.235 J/gºC

Mass of silver (M) =?

The mass of the sample of silver can be obtained as follow:

Q = MCΔT

261 = M × 0.235 × 23.8

261 = M × 5.593

Divide both side by 5.593

M = 261 / 5.593

M = 46.67 g

Thus, the mass of the sample of silver is 46.67 g

3 0
3 years ago
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klasskru [66]
Ur answer is A

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Calcium dihydrogen phosphate, Ca(H₂PO₄)₂, and sodium hydrogen carbonate, NaHCO₃, are ingredients of baking powder that react to
Gre4nikov [31]

0.012 mol of CO₂ is the volume of CO₂ is produced from 1.00 g of baking powder.

Balanced Equation:

Ca(H₂PO₄)₂(s) + 2NaHCO₃(s) → 2CO₂(g) + 2H₂O(g) + CaHPO₄(s) + Na₂HPO₄(s)

On 3.50 g of baking powerd:

mCa(H₂PO₄)₂ = 0.35*3.50 = 1.225 g

mNaHCO₃ = 0.31*3.50 = 1.085 g

The molar masses are: Ca = 40 g/mol; H = 1 g/mol; P = 31 g/mol; O = 16 g/mol; Na = 23 g/mol; C = 12 g/mol. So:

Ca(H₂PO₄)₂: 40 + 4x1 + 31 + 8x16 = 203 g/mol

NaHCO₃: 23 + 1 + 12 + 3x16 = 84 g/mol

The mass divided by the molar mass yields the number of moles, as in:

nCa(H₂PO₄)₂ = 1.225/203 = 0.006 mol

nNaHCO₃ = 1.085/84 = 0.0129 mol

Find the reactant that is limiting first. The stoichiometry for the Ca(H₂PO₄)₂ test is:

1 mol of Ca(H₂PO₄)₂ ---------- 2 mol of NaHCO₃

0.006 of Ca(H₂PO₄)₂ -------- x

By a simple direct three rule:

x = 0.012 mol

NaHCO₃ is therefore too much. After performing the stoichiometry calculus with the limiting reactant:

1 mol of Ca(H₂PO₄)₂ ------------- 2 mol of CO₂

0.006 of Ca(H₂PO₄)₂ -------- x

By a simple direct three rule:

x = 0.012 mol of CO₂

What is molar mass and how is it calculated?

The mass of every atom in a molecule, expressed in grams per mole, is known as the molar mass. We first obtain the atomic weights of the different elements in a periodic table in order to compute the molar mass of a molecule. Then, we multiply the total number of atoms by each one's atomic mass.

How is molar mass calculated and why is it important?

When converting a mass measurement to a substance amount, the molar mass ratio is utilized. The number of atoms, molecules, or ions that make up this quantity is used to express it. It is the proportion of an object's mass to the quantity of its constituent particles.

Learn more about molar mass: brainly.com/question/13152455

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