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
Pani-rosa [81]
3 years ago
5

A 30. mL sample of distilled water at 10ºC is added to a 50. mL sample of the same water at 50ºC in a coffee-cup calorimeter. Th

e final temperature of the mixture is closest to30ºC10ºC20ºC60ºC
Chemistry
1 answer:
Citrus2011 [14]3 years ago
5 0

Answer:

The final temperature of the mixture is closest to 30ºC

Explanation:

<u>Step 1:</u> Data given

Volume of sample 1 = 30 mL ≈ 30 grams

Temperature of sample 1 = 10 °C

Volume of sample 2 = 50 mL ≈ 50 grams

Temperature of sample 2 = 50 °C

Step 2: Calculate the final temperature

T(final) = (30 g * 10 °C + 50 g * 50 °C) / (50 g + 30 g)

T(final) = (300 + 2500)/80

T(final) = 35 °C

The final temperature of the mixture is closest to30ºC

You might be interested in
Put the list in chronological order (1–5).
Leokris [45]

Explanation:

Filtration is a separation technique in which solid particles suspended in liquid medium are separated by allowing the mixture through the pores of the filter paper. By this solid particles get collect on filter paper and liquid drains out from the pores of the filter paper.

The chronological order for given steps will be:

  1. Weigh and fold the filter paper.
  2. Place the filter paper in the funnel, then place the funnel in the Erlenmeyer flask.
  3. Allow the solid/liquid mixture to drain through the filter.
  4. Use water to rinse the filter paper containing the mixture.
  5. Weigh the dried filter paper and copper.
4 0
3 years ago
Read 2 more answers
how many grams of oxygen are produced if 25.0g of potassium chlorate decomposes according to the reaction 2KCLO3 —-&gt; 2KCL +3O
AveGali [126]

Answer:

approximately 15.1 grams.

Explanation:

The key to chemistry is to change everything to moles. Then when you have the answer in moles change the answer back to grams, liters, or whatever you want.

change 25 grams of potassium chlorate to moles.

calculate the gram molecular mass of potassium chlorate.

Chlorate is Cl with 3 oxygens. ate = saturated. Chlorine has seven valance electrons when it is saturated six of these electrons are used by oxygen ( 2 electrons per oxygen) leaving only 1 electron.

1 K x 39 grams/mole

+1 Cl x 35.4 grams/ mole

+3 O x 16 grams/ mole

= 122.4 grams / mole Potassium Chlorate

25

122.4

= moles.

2.05 moles of Potassium Chlorate.

There is a 1:1 mole ratio. 1 mole of Potassium Chlorate will produce 1 mole of Potassium Chloride.

2.05 moles of Potassium Chlorate will produce 2.05 moles of Potassium Chloride.

Find the gram molecular mass of Potassium Chloride.

1 K x 39 = 39

+1 Cl x 35.4 = 35.4

= 74.4 grams / mole.

2.05 moles x 74.4 grams/ mole = 15.2 grams

Hope it helps :)

6 0
3 years ago
Read 2 more answers
Explain how cells use digested food in your own words
natima [27]

Answer:

The digestive system uses mechanical and chemical methods to break food down into nutrient molecules that can be absorbed into the blood. ... Some animals use intracellular digestion, where food is taken into cells by phagocytosis with digestive enzymes being secreted into the phagocytic vesicles.

Explanation:

3 0
3 years ago
What design element of an astronaut's spacesuits protects him or her from micrometeoroids, which are tiny bits of space debris t
leonid [27]

Answer:

Tough outer shell

Explanation:

Three types of space suits based on their purpose are IVA (Intravehicular activity), EVA (extravehicular activity), and IEVA (intra/extravehicular activity)

Space suits have an outer layer known as the Integrated Thermal Micrometeoroid Garment also known as the TMG or ITMG

The functions of the TMG includes the provision of an insulation medium to the wearer of the suit thereby preventing loss of heat and keeping the wearer warm, protect the wearer from solar radiation which are harmful as well as from Micrometeoroid and debris orbiting in space known as MMOD

The outermost layer of the EMU TMG suits is white Ortho-Fabric that consists of Nomex, Kevlar and Gore-Tex, making it fire resistant, very strong and very tough, and water proof as well as breathable.

3 0
3 years ago
The formulas for elements never contain a subscript true or not true
Andru [333]
The answer should be false. Elements contain only one atom.
7 0
3 years ago
Other questions:
  • What mean mikroorganism
    9·1 answer
  • Amy performed an experiment in lab. She improperly mixed the chemicals, and an explosion of light, sound, and heat occurred. Whe
    15·2 answers
  • How many liters of hydrogen gas are needed to react completely with 50.0 L of chlorine gas at STP ?
    15·1 answer
  • STP is:
    6·1 answer
  • The ___________________ in the mouth secrete enzymes which help prepare the food for digestion in the stomach.
    8·2 answers
  • The six pollutants regulated under the Clear Air Act _____ between 1970 and 2001, while energy consumption increased 42 percent.
    5·2 answers
  • Which ion is responsible for basic properties?
    12·1 answer
  • Scientific knowledge of outer space has increased due to technology such as _______.
    9·2 answers
  • A 25.0 mL sample of HCI reacted with 20.0 mL of 2.00 M NaOH. What is the molarity of the HCI?
    15·1 answer
  • 22 °C to K (approximate room temperature)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!