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const2013 [10]
3 years ago
8

6th grade work east to some people! (:

Chemistry
1 answer:
blagie [28]3 years ago
7 0

b. is correct

wind can cool the land

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The periodic table contains information about which types of matter?
stiv31 [10]
B. elements
It's called the periodic table (of the elements)
7 0
3 years ago
Formula units in 0.0300 moles of cacl2
spin [16.1K]

Answer:

no of formula unit = 0.03\times 6.023\times 10^{23}=1.8\times 10^{22}

Explanation:

atomic mass of CaCl2 = 40 + 2×35.5 = 111 g.

no of formula unit = no of moles × Avagadro number

                               =0.03\times 6.023\times 10^{23}=1.8\times 10^{22}

3 0
4 years ago
Buffers are substances that help resist shifts in pH by Question 10 options: 1) releasing H in acidic solutions. 2) donating H t
ehidna [41]

Answer:

5) donating H to a solution when they have been depleted and accepting H when they are in excess.

Explanation:

A buffer solution is a solution that undergoes a negligible change in pH in addition of moderate quantities of acid or alkali. In other words, a buffer solution is one that resists a change in pH on addition or dilution of small amounts of acids or alkalis.

So, from the given question:

Buffers are substances that help resist shifts in pH by donating H to a solution when they have been depleted and accepting H when they are in excess.

8 0
3 years ago
During the cold winter months the surface Of a lake becomes hard Ice this is due to which change of state
nikitadnepr [17]

Freezing

Explanation:

This change in state when surface of a lake changes to hard ice is known as freezing.

  • When a solid is heated, it melts and changes to a liquid. On further heating, it changes to vapor and the randomness increases.
  • When a liquid is cooled below its freezing point, it changes to a solid such as ice for water.
  • The phase change is known as freezing.

Learn more:

Phase change brainly.com/question/1875234

#learnwithBrainly

8 0
3 years ago
The flavor of anise is due to anethole, a compound with the molecular forumal C10H12O. Combustion of one mole of anethole produc
AfilCa [17]

Answer:

Change in temperature of calorimeter is 4.52^{0}\textrm{C}

Explanation:

Molar mass of anethole = 148.2 g/mol

So, 0.950 g of anethole = \frac{0.950}{148.2}moles of anethole = 0.00641 moles of anethole

1 mol of anethole releases 5541 kJ of heat upon combustion

So, 0.00641 moles of anethole release (5541\times 0.00641)kJ of heat or 35.52 kJ of heat

7.854 kJ of heat increases 1^{0}\textrm{C} temperature of calorimeter.

So, 35.52 kJ of heat increases (\frac{1}{7.854}\times 35.52)^{0}\textrm{C} or 4.52^{0}\textrm{C} temperature of calorimeter

So, change in temperature of calorimeter is 4.52^{0}\textrm{C}

7 0
3 years ago
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