1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Solnce55 [7]
2 years ago
13

Stest will not impact your grade.

Chemistry
2 answers:
andreev551 [17]2 years ago
8 0
Answer c space craft are built to be airtight.
Diano4ka-milaya [45]2 years ago
5 0
C. Spacecraft are built to be airtight.
You might be interested in
Four hundred kg/h of Steam from a low pressure turbine at 12.5 atm. and 250 C goes into a feed water heater which preheats the w
Nitella [24]

Explanation:

According to the heat relationship,

    Heat given by steam = heat taken by water

Hence,    (mC_{p} \Delta T)_{steam} = (mC_{p} \Delta T)_{water}

where, C_{p} = specific heat

Value of C_{p}_{steam} at 250^{o}C and 12.5 atm is 2.326 kJ/Kg^{o}C.

And, C_{p}_{steam} at 200^{o}C and 12.5 atm is 2.743 kJ/Kg^{o}C.

Therefore, average C_{p}_{steam} = \frac{2.326 kJ/Kg^{o}C + 2.743 kJ/Kg^{o}C}{2}

                                          = 2.5345 kJ/Kg^{o}C

As the given data is as follows.

      m_{steam} = 400 kg/hr, \Delta T_{steam} = 250^{o}C - 200^{o}C = 50^{o}C, m_{water} = 500 kg/hr

            C_{p}_{water} = 4.186 kJ/kg^{o}C

Hence, putting the given values into the above formula as follows.

           (mC_{p} \Delta T)_{steam} = (mC_{p} \Delta T)_{water}

  (400 \times 2.5345 kJ/kg^{o}C \times 50^{o}C)_{steam} = (500 kg \times 4.186 kJ/kg^{o}C \Delta T)_{water}

                \Delta T_{water} = 24.2^{o}C

As we know that, \Delta T_{water} = T_{2} - T_{1}

                             T_{2} - 20^{o}C = 24.2^{o}C

                            T_{2} = 44.2^{o}C

Thus, we can conclude that the new temperature of water is 44.2^{o}C.

3 0
4 years ago
In a diamond, what type of bonds link carbon atoms together to form a network solid?
emmasim [6.3K]
Answer is covalent bonds.

Diamond is a giant covalent structure in which: each carbon atom is joined to four other carbon atoms by strong covalent bonds. the carbon atoms form a regular tetrahedral network structure. there are no free electrons.
4 0
2 years ago
Read 2 more answers
At -32.7 °C, a gas takes up 0.750 mL. What temperature, in °C, would be needed to reduce the volume to half that amount?
Gnom [1K]

Answer:

-152.92°C

Explanation:

Initial volume = 0.750 mL

Initial temperature = -32.7 °C (-32.7 + 273.15 K = 240.45 k)

Final temperature = ?

Final volume = 0.750 mL / 2= 0.375 mL

Solution:

The given problem will be solve through the Charles Law.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

T₂ = T₁V₂ / V₁

T₂ =  240.45 k  × 0.375 mL / 0.750 mL

T₂ = 90.17 mL.K / 0.750 mL

T₂ = 120.23  K

Temperature in celsius:

120.23  K - 273.15 = -152.92°C

6 0
3 years ago
3. Two people are playing tug of war. One person pulls to the right with 32 N of force. The other person pulls to the left with
SVETLANKA909090 [29]

The net force = -5 N

The direction : to the left(negative sign)

<h3>Further explanation </h3>

Net force : the sum of all forces acting on an object

Force is a vector quantity that has both magnitude and direction,

We agree that the move up and to the right is a positive sign, while down and to the left is a negative sign.

The direction of the force (horizontal motion) is to the right (+32 N), and to the left (-37 N), so the net force :

\tt \sum F=F~right-F~left\\\\\sum F=32-37\\\\\sum F=-5~N

5 0
3 years ago
What is the boiling point of<br> gold<br> 1064.43°C<br> 2970°C<br> 1313°C<br> 3266°C
Vikentia [17]

Answer:

The melting point of Gold is 1064.43 degrees celsius and the boiling point is 2807 degrees celsius.

8 0
4 years ago
Read 2 more answers
Other questions:
  • The reaction represented by the equation: xA + yB ---&gt; productsis started by mixing 1.00 mol of A with 2.00 mol of B in a 1.0
    6·1 answer
  • Oxygen gas is collected over water. The total pressure (the O2 pressure the water vapor pressure) is 736 torr. The temperature o
    13·1 answer
  • For which of the following can the composition vary?
    13·2 answers
  • The decomposition of nitryl chloride is described by the following chemical equation: 2NO2C1(g) → 2NO2 (g)-C12 (g) Suppose a two
    14·1 answer
  • How many total bond are in the Lewis structure for HSIN?
    14·1 answer
  • Each time the boy breathes, he exhales 0.02231 moles of gas at STP. How many liters of gas does he exhale?
    14·1 answer
  • What is the mass of 6 atom(s) of copper in grams?
    9·1 answer
  • What factors affect freezing-point depression of a solution? (select all that apply)
    6·1 answer
  • If I tripled the number molecules of Ag2 SO4 from 1 to 3 how would this effect this compound ?
    14·1 answer
  • Calculate the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 ml solution.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!