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vazorg [7]
3 years ago
7

Calculate the heat required to convert 10g of water at 100 c to steam at 100 c the specific heat of water is 1.00 cal the heat o

f fusion is 80 and the heat of vap is 540
Chemistry
1 answer:
sladkih [1.3K]3 years ago
3 0
Heat of vaporization of water will be required as water is already at it's boiling point thus heat required will be 540*10=5400 cal
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A cylindrical tube 13.5 cm high and 4.5 cm in diameter is used to collect blood samples. How many cubic decimeters (dm3) of bloo
Aleks [24]

Answer:

The cylindrical tube can hold 0.215 cubic decimeters of blood.

Explanation:

Diameter of the cylindrical tube = d = 4.5 cm

r = d/2 ,r = 2.25 cm

Height of the cylindrical tube = h = 13.5 cm

Volume of the cylinder = V = \pi r^2h

V=3.14\times (2.25 cm)^2\times 13.5 cm

V=214.6 cm^3=0.2146 dm^3\approx 0.215 dm^3

1 cm^3=0.001 dm^3

The cylindrical tube can hold 0.215 cubic decimeters of blood.

3 0
3 years ago
Identify the followings as a element or compound c12 h22o11
Anastaziya [24]

Answer:

Compound

Explanation:

The given specie is a compound.

A compound is made up of two or more kinds of atoms/elements joined together in a definite grouping.

  • The properties of a compound are distinct and different from those of the individual elements that are combined in its make-up.
  • For this given specie, the elements are carbon, hydrogen and oxygen.
  • So, this is a compound.

Elements are distinct substances that cannot be split - up into simpler substances. Such substances consist of only one kind of atom

6 0
3 years ago
) Starting with 5.00 g barium chloride n hydrate yields 4.26 g of anhydrous barium chloride after heating. Determine the integer
RSB [31]

Answer:

2

Explanation:

Mass of water molecule = mass of hydrated salt - mass of anhydrous salt

Mass of water molecule = 5.00 - 4.26 = 0.74g of water molecule.

Number of moles = mass / molarmass

Molar mass of water = 18.015g/mol

No. of moles of water = 0.74 / 18.015 = 0.0411 moles.

Mass of BaCl2 present =?

1 mole of BaCl2 = 208.23 g

X mole of BaCl2 = 4.26 g

X = (4.26 * 1) / 208.23

X = 0.020

0.020 moles is present in 4.26g of BaCl2

Mole ratio between water and BaCl2 =

0.0411 / 0.020 = 2

Therefore 2 molecules of water is present the hydrated salt.

4 0
3 years ago
Help me answer these science questions plz help plzzz questions 18,20,21
zepelin [54]
Idk 18 but here is 20

conductor-a substance that readily conducts
insulator-a substance that does not readily allow the passage of heat or sound
ammeter-an instrument for measuring electric current in amperes.
voltmeter- an instrument for measuring electric potential in volts
current-a flow of electricity which results from the ordered directional movement of electrically charged particles.
potential difference-the difference of electrical potential between two points.
ohmic resistor- resistors that have a constant resistance
non-ohmic resistor- a resistor that's resistance increases as the current increase
power-the capacity or ability to direct or influence the behavior of others or the course of events.
8 0
3 years ago
On the map above, country 6 is __________ and country 2 is __________. A. Japan . . . Mongolia B. South Korea . . . China C. Jap
Y_Kistochka [10]

Answer:

The correct answer is C. On the map above, country 6 is Japan and country 2 is China.

Explanation:

Japan is an Eastern Asian constitutional monarchy located in the Pacific Ocean, east of China, North Korea, South Korea and Russia. It extends from the Ochotsk Sea in the north to the East China Sea and Taiwan in the south. Japan is an archipelago of 6,852 islands. The four largest islands are Honshu, Hokkaido, Kyushu and Shikoku, which together account for 97% of Japan's area. Japan has the world's 11th largest population with over 127 million inhabitants.

In turn, China is by far the largest country in East Asia and the world's most populous country with 1.4 billion inhabitants. It is an economic and military superpower and has a permanent seat on the UN Security Council. Chinese civilization is one of the oldest in the world and originated around the Yellow River in northeastern China.

6 0
3 years ago
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