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Thepotemich [5.8K]
4 years ago
7

The density of corn syrup is 1.38 g/cm3.. . Which substance will float in corn syrup? A. graphite (2.16 g/cm3). B. glycerin (1.2

6 g/cm3). C. copper (8.9 g/cm3). D. silver (10.5 g/cm3)
Chemistry
2 answers:
PolarNik [594]4 years ago
7 0
"Glycerin" is the one substance among the following choices given in the question that will <span>float in corn syrup. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that has actually come to your desired help.</span>
9966 [12]4 years ago
7 0

Answer: B. glycerin (1.26 g/cm3).

Explanation: The substances with higher value of density than the density of corn syrup will sink and the substances with lower value of density than the density of corn syrup will float.

A.  graphite : has a density of 2.16g/cm^3 which is higher than the density of corn syrup which is 1.38g/cm^3, Thus it will sink.

B. glycerin: has a density of 1.26g/cm^3 which is lower than the density of corn syrup which is 1.38g/cm^3, Thus it will float.

C. copper :has a density of 8.9g/cm^3 which is higher than the density of corn syrup which is 1.38g/cm^3, Thus it will sink.

D. silver: has a density of 10.5g/cm^3 which is higher than the density of corn syrup which is 1.38g/cm^3, Thus it will sink.

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b. erosion.

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the balanced equation is as follows

2H₂S + 3O₂ --> 2SO₂ + 2H₂O

molar ratio also known as stoichiometry is the ratio in which the reactants and products are either formed or reacted in the given equation

molar ratio can be determined by the coefficients of the compounds in the balanced reaction

coefficient is the number in front of the chemical compound

coefficients for the compounds in this reaction are as follows

H₂S - 2

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SO₂ - 2

H₂O - 2

therefore correct option is

H₂S:SO₂ = 2:2 and O₂:H₂O = 3:2

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43.2 + 50.0 + 16.0= answer in correct amount of significant figures
Molodets [167]

Answer : The correct answer is 109.

Explanation :

Significant figure : It is defined as the each digits of a number have meaning or contribute to the value of the number.

The addition of given digits is,

43.2 + 50.0 + 16.0 = 109.2

As per the question, the given digits has 3 significant figures. But the answer after addition is 109.2 has 4 significant figures.

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Therefore, from the addition rule, the correct answer is 109.

4 0
3 years ago
1. How much heat is required to raise the temperature of 4.64kg of lead from 150°C to 219°C?
diamong [38]

Answer: An amount of 40980.48 J/g^{o}C heat is required to raise the temperature of 4.64kg of lead from 150°C to 219°C.

Explanation:

Given: mass of lead = 4.64 kg

Convert kg into grams as follows.

1 kg = 1000 g\\4.64 kg = 4.64 kg \times \frac{1000 g}{1 kg}\\= 4640 g

T_{1} = 150^{o}C

T_{2} = 219^{o}C

The standard value of specific heat of lead is 0.128 J/g^{o}C.

Formula used to calculate heat is as follows.

q = m \times C \times \Delta T

where,

q = heat energy

m = mass of substance

C = specific heat of substance

\Delta T = change in temperature

Substitute the value into above formula as follows.

q = m \times C \times \Delta T\\= 4640 g \times 0.128 J/g^{o}C \times (219 - 150)^{o}C\\= 40980.48 J/g^{o}C

Thus, we can conclude that 40980.48 J/g^{o}C heat is required to raise the temperature of 4.64kg of lead from 150°C to 219°C.

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