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sveta [45]
3 years ago
5

The moon is 250,000 miles away. How many inches is it from earth?

Chemistry
2 answers:
Maksim231197 [3]3 years ago
5 0

Answer: 110000000 inches

Explanation: Since the moon is 1,320,000,000ft away from the earth you divide 1,320,000,000ft  with 12 to get your final answer 110000000      

Lapatulllka [165]3 years ago
3 0

Answer:

1.584e10 = 15,840,000,000,000

Explanation:

250,000 miles

multiply the length value by 63360

25e4 x 63360

= 1.584e10

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Nal+ pb(SO4) 2 Pbl4 + Na2SO4 explain how to balance the chemical equation and classify its reaction type
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Explanation:

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a concentration solution of H2so4 is 59.4% by mass (m/m) and has a density of 1.83 g/mL. How many mL of the solution would be re
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Answer: 41.5 mL

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n}{V_s}

where,

n = moles of solute

V_s = volume of solution in L

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moles of H_2SO_4=\frac{\text {given mass}}{\text {molar mass}}=\frac{59.4g}{98g/mol}=0.61

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Now put all the given values in the formula of molality, we get

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To calculate the volume of acid, we use the equation given by neutralisation reaction:

M_1V_1=M_2V_2

where,

M_1\text{ and }V_1 are the molarity and volume of stock acid which is H_2SO_4

M_2\text{ and }V_2 are the molarity and volume of dilute acid which is H_2SO_4

We are given:

M_1=11.2M\\V_1=mL\\M_2=0.30M\\V_2=1550mL

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11.2\times V_1=0.30\times 1550\\\\V_1=41.5mL

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Answer: The correct matching are as follows:

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4. BALANCE: Massing out 120 g of sodium chloride.

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5. WIRE GAUZE: Suspending glassware over the Bunsen burner.  

Wire gauze is usually used in the laboratory in order to prevent direct heating of chemical compounds. The wire is typically placed first on the busen burner and then the substance to be heated will be placed on the wire.

6. FUNNEL: Used to pour liquids into containers with small openings or to hold filter paper.

Funnel is used for variety of purpose in the laboratory; it can be used to ease pouring of liquids and it can also be used during separation process, for instance during filtration. It can be made of glass or plastic.

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8. TEST TUBE CLAMPS: Heating contents in a test tube.

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9.  TEST TUBE RACK: Holding many test tubes filled with chemicals.

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10.    WIRE BRUSH: Used to clean the inside of test tubes or graduated cylinders.

Wire brush is used to clean the inside of narrow glass wares such as test tubes and cylinder. The wire brush facilitate proper cleaning of the inside of the glasses.

11. WATCH GLASS: Keeping liquid contents in a beaker from splattering.

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12. ERIENMEYER FLASK: A narrow-mouthed container used to transport, heat or store substances, often used when a stopper is required.

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13. BUSEN BURNER: Heating contents in the lab.

Busen burner is used in the laboratory to produce heat, It is usually connected to a cylinder of gas fuel. Chemical can be heated either directly on indirectly on the bursen burner. Wire gauze is usually used when direct heating is not desired.

14. TONGS: Transport a hot beaker.

Tongs are used to hold hot beakers and to move them from one point to another. It is not safe to use bare hands to carry heated chemicals in the lab, tongs should always be used to hold beakers over busen burner and also to transport them.

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