3 years ago

How many moles of nitrogen, N, are in 78.0g of nitrous oxide, N2O?

Chemistry

1 answer:

DaniilM [7]3 years ago

8 0

I hope this helps you!

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What is the cost to drive to Los Angeles from San Francisco a distance of 405 miles if the cost of gasoline is $2.90 a gallon an

choli [55]

Answer: $46.98

Explanation:

The distance to drive to Los Angeles from San Francisco is 405 miles. Since the car get 25 miles per gallon of gas, for 405 miles, the car will use:

= 405/25 = 16.2 gallons

Since the cost of gasoline is $2.90 a gallon and the car will use 16.2 gallons. The cost will be:

= $2.90 × 16.2 gallons

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3 years ago

A kayak travels in a lake at an average speed of 35 m/min. If the perimeter of the lake

DanielleElmas [232]

Answer: 4 hours

Explanation:

It takes the kayak 1 minute to travel 35 meters.

Divide the total (8400m) by the amount of meters per minute (35m)

$\frac{8400m}{35m} =240minutes$

Now convert into hours. (Remember that 1h has 60min)

$240min(\frac{1h}{60min})=4h$

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3 years ago

Use the following equation to answer the questions below.

sertanlavr [38]

Answer:

Explanation:

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3 years ago

Which tool would best allow you to make observations of an object's color and texture?

strojnjashka [21]

Answer: I would say it is the D

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3 years ago

Read 2 more answers

How many atoms of copper in 3. 11 g of copper

son4ous [18]

Atomic weight of copper = 63.5 g
1 mole of copper contains = 63.5g = 6.023 × 10²³ atoms of copper
1 g of copper contains
$= \frac{ 6.023 \times 10²³}{63.5}$ = 9.4 × 10²¹ atoms
Therefore, 3.11g of copper contains
$= 3.11 \times 9.4 \times {10}^{21} \\$
= 29.234 × 10²¹ atoms

Hope you could get an idea from here.

Doubt clarification - use comment section.

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3 years ago