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umka21 [38]
3 years ago
11

Question 6 (1 point)

Chemistry
1 answer:
Morgarella [4.7K]3 years ago
8 0

Answer:

question 6: winter solstice

question 7: rotation is when an object spins around its axis, revolution is when an object travels in a path around another

question 8: the rotational period is equal to the period of revolution for the moon

question 10: true

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In what order are chemical elements arranged on the periodic table?
Gala2k [10]

Answer:

an increasng atomic number/ increasing proton count

Explanation:

3 0
2 years ago
A current of 0.15 A is passed through an aqueous solution of K2PtCl4. How long will it take to deposit 1.00 g Pt(s) (M = 195.1)?
koban [17]

First calculate the electric charge used to deposit 1.0 g Pt

C = (1.0 g Pt) (1 mol Pt / 195.1 g Pt) ( 2 mol e / 1 mol Pt) ( 96485 C / 1 mol e)

C = 989.08 C

C = It

Where I is the current

T is the time

T = C / i

T = 989.08 C / 0.15 A

T = 6593.88 s

T = 1.83 hrs

7 0
3 years ago
How can you show the conservation of mass when making a physical mixture?
Yuki888 [10]

Answer:

A. Show that the total of the masses of the starting substances equals the mass of the mixture.

Explanation:

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

In a similar way if we have mixture of sugar and sand the total weight of mixture is equal to the weight of reactants.

sand + sugar + water    → mixture

     10g+5g+20 g           =   35 g

7 0
2 years ago
2 Na
Musya8 [376]

Answer:

B Nacl is a correct

Explanation:

Nacl is a correct

8 0
3 years ago
A blacksmith making a tool heats 525 grams of steel to 1230C . After hammering the steel ,she places it into a bucket of water t
mash [69]

Answer:

Q = 18625.95 j

Explanation:

Given data:

Mass of steel = 525 g

Initial temperature = 123 °C

Final temperature = 50 °C

Heat release by steel = ?

Specific heat capacity of steel = 0.486 j/g. °C

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT  = T2  - T1

ΔT  = 123°C - 50°C

ΔT  = 73°C

Q = m.c. ΔT

Q = 525 g.  0.486 j/g.°C . 73°C

Q = 18625.95 j

3 0
3 years ago
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