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
Juli2301 [7.4K]
3 years ago
8

Calculate the volume of 2.408x1024 molecules of water vapor at STP.

Chemistry
1 answer:
Tom [10]3 years ago
8 0

Answer:

B

Explanation: im not rlly sure you can go with what i said or you dont

You might be interested in
Fill in the blanks in the following sentences:
Nezavi [6.7K]

Answer:

a. neutral

b. basic /alkaline

c. acidic

4. 13

4 0
3 years ago
How much ice (in grams) would have to melt to lower the temperature of 353 mL of water from 26 ∘C to 6 ∘C? (Assume the density o
Rashid [163]

Answer:

The mass of ice required to melt to lower the temperature of 353 mL of water from 26 ⁰C to 6 ⁰C is 85.4197 kg

Explanation:

Heat gain by ice = Heat lost by water

Thus,  

Heat of fusion + m_{ice}\times C_{ice}\times (T_f-T_i)=-m_{water}\times C_{water}\times (T_f-T_i)

Where, negative sign signifies heat loss

Or,  

Heat of fusion + m_{ice}\times C_{ice}\times (T_f-T_i)=m_{water}\times C_{water}\times (T_i-T_f)

Heat of fusion = 334 J/g

Heat of fusion of ice with mass x = 334x J/g

For ice:

Mass = x g

Initial temperature = 0 °C

Final temperature = 6 °C

Specific heat of ice = 1.996 J/g°C

For water:

Volume = 353 mL

Density (\rho)=\frac{Mass(m)}{Volume(V)}

Density of water = 1.0 g/mL

So, mass of water = 353 g

Initial temperature = 26 °C

Final temperature = 6 °C

Specific heat of water = 4.186 J/g°C

So,  

334x+x\times 1.996\times (6-0)=353\times 4.186\times (26-6)

334x+x\times 11.976=29553.16

345.976x = 29553.16

x = 85.4197 kg

Thus,  

<u>The mass of ice required to melt to lower the temperature of 353 mL of water from 26 ⁰C to 6 ⁰C is 85.4197 kg</u>

7 0
3 years ago
An exothermic reaction is conducted in an insulated calorimeter filled with water. The calorimeter is then sealed so that there
Vaselesa [24]
Answer: option <span>C. the total energy inside the calorimeter will decrease.
</span>

Justification:

The answer is a direct application of the first law of thermodynamic (the law of conservation of energy).

By telling that the t<span>he calorimeter is sealed so that there is no heat exchanged between the contents of the container and the surrounding air, the first law of thermodynamics implies that the total energy inside the calorimeter will not change.
</span>

<span>That statement, without adding any more is enough justification.
</span>

Regarding, the other statements, you can show they are true:

<span>A. the thermometer will show an increase in temperature.
</span><span>
</span><span>
</span><span>Since the reaction is exothermic, the heat released will increase the temperature inside the sealed calorimeter,which, of course, is shown by the termometer.
</span><span>
</span><span>
</span><span>
</span><span>B. The potential energy of the products will be lower than that of the reactants.
</span><span>
</span><span>
</span><span>In any exothermic reaction, the potential energy of the products is lower than that of the reactants, because the heat released is lost by the reactants when they react and transform into the products.
</span><span>
</span><span>
</span><span>D. The water increases in temperature as the reaction gives off heat</span>.

Sure. The heat cannot leave the sealed calorimeter, but the water inside the calorimeter will absorb that heat: the molecules of water will gain kinetic energy and so its temperature will be increase.

6 0
3 years ago
How many atoms is in h20
Nataly_w [17]

Answer:

3 atoms

Explanation:

2 hydrogen atoms and 1 oxygen atom

5 0
3 years ago
Read 2 more answers
How many moles is 50g of CaCO3?
Neko [114]

\huge\underline\mathbb\pink{♡Your Answer♡}

Formula mass of CaCO3 is

40 + 12 + 3-100amu....

100g CaCO3 = 1 mole..

50g of CaCO3 = 1÷ 100x 5 = 0.5mole...

<h3>Hence ,answer is 0.5mole...</h3>

Hope it helps you..

Thanks...

3 0
3 years ago
Other questions:
  • What is the correct answer?
    11·1 answer
  • What mass of O2 was used up in the reaction with an excess of SO2 gas if 14.2 g of sulfur trioxide is formed?
    8·1 answer
  • In a problem, you are given two pressures and one temperature at constant volume and amount of gas. You are asked to find a seco
    15·2 answers
  • Out of 13 students how many<br> saw themselves in the<br> horoscope?
    7·1 answer
  • Hello, everyone!
    15·1 answer
  • what is the main difference between organisms that share many characteristics and organisms that do not
    8·1 answer
  • The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call
    13·1 answer
  • The half-life of I-37 is 8.07 days. If 25 grams are left after 40.35 days, how many grams were in the original sample?
    9·1 answer
  • The carbon dioxide gas that was generated during this reaction was collected at 295K and 125 kPa. If 43.2 L of carbon dioxidegas
    12·1 answer
  • Abc Which excerpt from an essay about higher education most clearly shows an example of logos? According to recent studies, more
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!