admin

2 months ago

Guest #444

2 months ago

The answer to this would be:

The shuttle can carry a maximum of**4 astronauts** for one mission.

2 LiOH + CO2 -----> Li2CO3 + H2O

(3.50 × 10^4 g LiOH) (1 mol LiOH/ 24 g LiOH) ( 1 mol CO2 / 2 mol LiOH) ( 44 g CO2 /1 mol CO2) = 32, 083.33 g CO2

32, 083.33 g / 9 (8.8 × 10^2) = 4

The shuttle can carry a maximum of

2 LiOH + CO2 -----> Li2CO3 + H2O

(3.50 × 10^4 g LiOH) (1 mol LiOH/ 24 g LiOH) ( 1 mol CO2 / 2 mol LiOH) ( 44 g CO2 /1 mol CO2) = 32, 083.33 g CO2

32, 083.33 g / 9 (8.8 × 10^2) = 4

Question

Why does warm soda go flat faster than cold soda

Solution 1

The gas comes out more quickly when the can is warm because carbon dioxide is less soluble in warmer liquids.

Solution 2

Carbonation lasts longer in colder environments.

Question

A polar covalent bond will form between which two atoms? a. beryllium and fluorine (group 1 and group 7)
b. hydrogen and chlorine (group 7)
c. sodium and oxygen (group 1 and group 6)
d. fluorine and fluorine (group 7)

Solution 1

Types of Bonds can be predicted by calculating the difference in electronegativity.

If, Electronegativity difference is,

Less than **0.4 **then it is **Non Polar Covalent**

Between **0.4 **and **1.7 **then it is **Polar Covalent **

Greater than **1.7 **then it is **Ionic**

**For Be and F,**

E.N of Fluorine = 3.98

E.N of Beryllium = 1.57

________

E.N Difference 2.41 (**Ionic Bond**)

**For H and Cl,**

E.N of Chorine = 3.16

E.N of Hydrogen = 2.20

________

E.N Difference 0.96 (**Polar Covalent Bond**)

**For Na and O,**

E.N of Oxygen = 3.44

E.N of Sodium = 0.93

________

E.N Difference 2.51 (**Ionic Bond**)

**For F and F,**

E.N of Fluorine = 3.98

E.N of Fluorine = 3.98

________

E.N Difference 0.00 (**Non-Polar Covalent Bond**)

**Result:**

A polar covalent bond is formed between Hydrogen and Chlorine atoms.

Question

As ice transforms into steam, Question options:
new molecules are formed.
the types of atoms are changed.
energy is absorbed by the molecules.
the mass of the molecules is increased.

Solution 1

Energy is absorbed by the molecules.

Question

Hydrocarbons are chain-like or ring-like molecules made of carbon and ________ atoms.

Solution 1

Hydrocarbons are made of Hydrogen and carbon atoms. An easy way to remember is in the name itself.

Question

Solid metals undergo greater thermal expansion than liquids do.

Solution 1

**Answer:**

false

**Explanation:**

Question

Overall mineral crystal size depends on how fast a solution _____.

Solution 1

In overall, the size of the mineral crystal depends on how fast a solution cools down. More time that is spent during cooling creates larger crystals because of the free movement of the constituent of mineral isotopes in a somewhat liquid solution.

Solution 2

Answer:cools

Explanation:

Question

Natural gas is primarily composed of ________. natural gas is primarily composed of ________. methane sulfur dioxide nitrogen oxygen nitrite

Solution 1

Natural gas is primarily composed of **methane (CH4)**

Natural gas is a naturally occurring hydrocarbon mixture which is primarily composed of Methane(CH4), but it also contains ethane,propane and heavier hydrocarbon. In addition it contain small amount of nitrogen, carbon dioxide,hydrogen sulfide and traces amount of water.

N

Question

It is necessary to have a 40% antifreeze solution in the radiator of a certain car. the radiator now has 70 liters of 20% solution. how many liters of this should be drained and replaced with 100% antifreeze to get the desired strength?

Solution 1

The answer is : 1**7.5 liters drained and replaced by 17.5 liters of 100% solution. **

x = amount drained and replaced

(70-x) = remaining amount of 20% solution

.20(70-x) + 1.00(x) = .40(70)

14 - .2x + 1x = 28

1x - .2x = 28 - 14

.8x = 14

x = 14/.8

x= 17,5 ( 17.5 liters drained and replaced by 17.5 liters of 100% solution)

(70-x) = remaining amount of 20% solution

.20(70-x) + 1.00(x) = .40(70)

14 - .2x + 1x = 28

1x - .2x = 28 - 14

.8x = 14

x = 14/.8

x= 17,5 ( 17.5 liters drained and replaced by 17.5 liters of 100% solution)

Solution 2

**Answer:**

17.5 litres removed and 17.5 litres of pure antifreeze added

**Explanation:**

Let k equal the amount of the solution to be removed

amount of antifreeze to be added

0.2(70 - x) + x = 0.4(70)

14 - 0.2x +x = 28

0.8x = 28 -14

x = 14/0.8 = 17.5

x = 17.5 litres removed and 17.5 litres of pure antifreeze added

Question

How many kilojoules are required to convert 115.0 g of ice at 0.0 ∘c to liquid water at 32 ∘c? the heat of fusion of water is 334 j/g, and the heat capacity of water is 4.184 j/g ∘c?

Solution 1

The answer is **53.8 kJ**.

Solution:There are two major steps in converting ice to liquid water. It begins with a phase change when ice melts at 0.0°C, and then a temperature change when the liquid water rises in temperature from zero to 32°C.

The amount of heat involved with the phase change melting is given by

q = (mass of water) (ΔHfus)

= (115.0 g)(334 J/g)

= 38410 J = 38.41 kJ

The amount of heat involved with temperature change is

q = mcΔT

= (115.0g)(4.184J/g°C)(32°C - 0.0°C)

= 15397.12 J = 15.39712 kJ

Summing up the two values gives the total heat required to convert ice to liquid water:

q = 38.41 kJ + 15.39712 kJ= 53.8 kJ

Solution:There are two major steps in converting ice to liquid water. It begins with a phase change when ice melts at 0.0°C, and then a temperature change when the liquid water rises in temperature from zero to 32°C.

The amount of heat involved with the phase change melting is given by

q = (mass of water) (ΔHfus)

= (115.0 g)(334 J/g)

= 38410 J = 38.41 kJ

The amount of heat involved with temperature change is

q = mcΔT

= (115.0g)(4.184J/g°C)(32°C - 0.0°C)

= 15397.12 J = 15.39712 kJ

Summing up the two values gives the total heat required to convert ice to liquid water:

q = 38.41 kJ + 15.39712 kJ= 53.8 kJ

Question

0.50 g Al equals how many moles

Solution 1

**Answer: The number of moles of 0.50 g Aluminium is 0.0185 moles.**

**Explanation:**

**To calculate the number of moles, we use the formula:**

**In the given question:**

Given mass of Aluminium = 0.50 g

Molar mass of Aluminium = 27 g/mol

**Putting values in above equation, we get:**

**Hence, the number of moles of 0.50 g of Aluminium is 0.0185 moles.**

Solution 2

Molar mass of aluminum ( Al ) = 26.98 g/mol

n = m / M

n = 0.50 / 26.98

**n = 0.01853 moles**

hope this helps!

n = m / M

n = 0.50 / 26.98

hope this helps!

Mathematics
2647929

History
842281

English
748681

Biology
586256

Social Studies
406852

Chemistry
368373

Business
348603

Physics
324927

Health
199835

Spanish
130075

Geography
112100

Computers and Technology
106146

Arts
77164

Advanced Placement (AP)
23675

World Languages
23213

French
22589

Engineering
19607

Law
17108

Medicine
13966

SAT
10987

German
3389

High School
3423409

Middle School
2092250

College
1518097