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kozerog [31]
3 years ago
14

John roller skates 48 km in 3 hours. What is his average speed in kilometers

Chemistry
2 answers:
Nadya [2.5K]3 years ago
7 0

Answer:16km/hr

Explanation:

48km/3hr= 16km/hr

slava [35]3 years ago
4 0

Answer:

16km/ hr

Explanation:

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Calculate the ratio of the mass ratio of SS to OO in SOSO to the mass ratio of SS to OO in SO2SO2. Consider a sample of SOSO in
Veronika [31]

Answer:

The ratio of the mass ratio of S to O; in SO, to the mass ratio of S to O; in SO₂, is  2:1

Explanation:

According to the consideration, let us first find the ratio of S and O in both the compounds

For SO:

\frac{m_{S} }{m_{O} }= \frac{32}{16}\\\\   \frac{m_{S} }{m_{O} }= 2

Let us express it as

SO_{\frac{m_{S} }{m_{O} }} = 2

For SO₂,

Due to two oxygen atoms in the molecule, the mass of oxygen will be taken two times

\frac{m_{S} }{m_{O} }= \frac{32}{(2)(16)}\\\\   \frac{m_{S} }{m_{O} }= 1

Let us express it as

SO_2_{\frac{m_{S} }{m_{O} }}= 1

Now, for the ratio of both the above-calculated ratios,

\frac{SO_{\frac{m_{S} }{m_{O} }}}{SO_2_{\frac{m_{S} }{m_{O} }}}=\frac{2}{1}

The required ratio is 2:1

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3 years ago
The volume of a gas is 22.4 L when the pressure of the atmosphere is 1.00 atm. If the pressure is increased to 1.05 atm, without
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Answer:

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Summarize the five points of Dalton’s atomic theory, and explain at least one change that occurred to the atomic theory because
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The postulates of Dalton's theory were:
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5) Chemical reactions are the rearrangement of atoms
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The second postulate was also disproved upon the discovery of isotopes.
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3 years ago
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First find the number of moles of KSCN is in 4.40g of KSCN 1. Number of moles = mass given (4.40g) / molecular weight(MW) (KSCN) - to calculate MW, look for each element in the periodic table and add their atomic weight 2. Convert 200mL to liters 3. Concentration = number of moles/ volume in liters from (#2)
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Nitrogen gas in the atmosphere is converted to forms of nitrogen usable by vegetation via:
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