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koban [17]
3 years ago
5

1. At STP, how many liters of oxygen are required to react completely with 3.6 liters of hydrogen to form water? 2H2(g)+O2(g) -&

gt; 2H2O(g)
a. 1.8 L
b. 3.6 L
c. 2.0 L
d. 2.4 L

2. Which conversion factor do you use first to calculate the number of grams of CO2 produced by the reaction of 50.6 g of CH4 with O2? The equation for the complete combustion of methane is: CH4(g) +2O2(g) -> CO2 + 2H2O(l)

a. 1 mol CH4/ 16.0g CH4
b. 2 mol O2/1 mol CO2
c. 16.0g CH4/1 mol CO4
d. 44.0g CO2/2 mol CO2

3. Which of the following statements is true about the following reaction? 3NaHCO3(aq) + C6H8)7(aq) -> 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq)

a. 22.4 L of CO2(g) are produced for every liter of C6H8O7(aq) reacted.
b. 1 mole of water is produced for every mole of carbon dioxide produced.
c. 6.02 x 10^23 molecules of Na3C6H5O7(aq) are produced for every mole of NaHCO3(aq) used.
d. 54 g of water are produced for every mole of NaHC)3(aq) produced.
Chemistry
1 answer:
ElenaW [278]3 years ago
6 0
1. is a
2.is a
3.is b
hope this helps
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Answer:

Given equation of parabola is

and

2

=64x ......(i)

The point at which the tangent to the curve is parallel to the line is the nearest point on the curve.

On differentiating both sides of equation (i), we get

2 y

dx

d y

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⇒

dx

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and

32

Also, slope of the given line is −

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4

∴−

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and

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⇒and=−24

From equation (i), (−24)

2

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∴ the required point is (9,−24)

Explanation:

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5 0
3 years ago
The hydrochloride form of cocaine has a solubility of 1.00 g in 0.400 mL water. Calculate the molarity of a saturated solution o
Tanya [424]

Answer:

The molarity of the solution is 7.4 mol/L

Explanation:

From the question above

0.400 ml of water contains 1.00 g of hydrochloride form of cocaine

Therefore 1000 ml of water will contain x g of hydrochloride form of cocaine

                    x = 1000 / 0.400

                    x = 2500 g

2500g of hydrochloride form of cocaine is present in 1000 ml of water.

Mole of hydrochloride form of cocaine = mass /molar mass of hydrochloride

Mole of hydrochloride form of cocaine = 2500/339.8

                                                                = 7.4 mol

Molarity = mol/ volume in liter (L)

molarity = 7.4 /1

Molarity = 7.4 mol/L

6 0
3 years ago
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How does mass affect potential energy?
Andreyy89

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8 0
3 years ago
Fill in the chart to describe and give examples of physical changes.
frosja888 [35]

Answer:

here are some examples of physical change!!!

Explanation:

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3 years ago
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When 12 grams of carbon react with 32 grams of oxygen, the compound carbon dioxide (a greenhouse gas) is formed. What is true ab
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Answer:

Option C = 6 of carbon react with 16 g of oxygen.

Explanation:

In given question it is stated that 12 g  of carbon react with 32 g of oxygen to produce carbon dioxide. The other combination option c is also true because in this, the quantity of both reactant is just half from the given quantity. Which means that if 100 % product is obtained from the 12 g of carbon and 32 g of oxygen then by taking the half amount of reactant the product will be half i.e 50% .

This combination is true because the ratio of both reactant are justified.

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Option C:

Carbon ( 12/2 =6g ) + Oxygen (32/2 = 16g) → Carbon dioxide

           C : O     1  : 2.6

6 0
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