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snow_lady [41]
3 years ago
14

3) During the day at 27°C a cylinder with a sliding top contains 20.0 liters

Chemistry
1 answer:
tatiyna3 years ago
4 0

Answer:

T_2=12\°C

Explanation:  

Hello there!  

In this case, according to the Charles' law equation which help us to understand the directly proportional relationship between volume and temperature:

\frac{T_2}{V_2}=\frac{T_1}{V_1}  

Thus, by solving for the final temperature, T2, and making sure we use the temperatures in Kelvin, we can calculate the final temperature as shown below:

T_2=\frac{T_1V_2}{V_1}  \\\\T_2=\frac{(27+273)K*19L}{20.0L}\\\\T_2=285-273\\\\T_2=12\°C

Best regards!  

Best regards!

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Verdich [7]
Answer: A. Salt in the Dead Sea is saltier
3 0
4 years ago
PLSS HELP I'm really stuck!
ss7ja [257]

Answer:

The steps are explained below, the essential step is to find mass here, 120 g of NaOH.

Explanation:

In order to answer this question, we need to define molarity conceptually firstly to see what variables we need. According to the formula, molarity is equal to the ratio between moles and volume, while moles itself is a ratio between mass and molar mass. This means we have a formula for molarity involving mass, molar mass and volume:

c = \frac{n}{V} = \frac{m}{MV}

In order to prepare a 500.0 mL of stock solution of 6.0 M of NaOH, we then need to find the mass of NaOH dissolved in this solution using the equation above:

m = cMV = 6.0 M\cdot 39.997 g/mol\cdot 0.5000 L = 120 g

Now, since we have the mass of NaOH, we can describe the steps needed to prepare this solution:

  • measure 120 grams of solid NaOH;
  • add this mass of NaOH into a 500.0-mL Erlenmeyer flask;
  • fill approximately half of the flask with distilled water and stir gently to make sure that NaOH dissolves, if it doesn't, add more water and repeat the process;
  • when NaOH fully dissolves, fill the flask to the mark.

Our solution is prepared.

6 0
4 years ago
Question 9 (1 point)
pantera1 [17]

Answer:

8 moles of C

Explanation:

From the question given above, the following equation was obtained:

3A + 2B —> 6C

From the equation above,

3 moles of A reacted to produce 6 moles of C.

Thus, the number of mole of C produced by reacting 4 moles of A can be obtained as follow:

From the equation above,

3 moles of A reacted to produce 6 moles of C.

Therefore, 4 moles of C will react to produce = (4 × 6)/3 = 8 moles of C

Thus, 8 moles of C can be obtained from the reaction of 4 moles of A with excess B

6 0
3 years ago
Determine the specific heat of a material if a 15 gram sample absorbs 75 J of heat as it is temperature increases from 15°C to 4
Roman55 [17]

Answer:

Cp=0.2\frac{J}{g\°C}

Explanation:

Hello,

In this case, the heat, mass, specific heat and temperature change are related by:

Q=mCp\Delta T

Thus, if we want to compute the specific heat we simply solve for it:

Cp=\frac{Q}{m\Delta T}=\frac{75J}{15g*(40-15)\°C}  \\\\Cp=0.2\frac{J}{g\°C}

Best regards.

3 0
3 years ago
Read 2 more answers
What is the molarity of NO−3 in 0.160M KNO3?
zubka84 [21]
A solution of KNO3 consists of ions of potassium and nitrate. The ionic equation is expressed as:

KNO3 = K+ + NO3-

There is 1 is to 1 ratio between the substances. So, the molarity of NO3- in the solution is calculated as follows:

0.160 mol / L KNO3 ( 1 mol NO3- / 1 mol KNO3 ) = 0.160 M NO3-
5 0
3 years ago
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