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NARA [144]
3 years ago
13

What is the force that pulls objects towards the ground on earth?

Chemistry
1 answer:
natka813 [3]3 years ago
5 0
Answer: gravity

Explanation:
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How many moles does 13.3 g of Cu contain?
mariarad [96]
<h2>Hello!</h2>

The answer is:

There are 0.209 moles of Cu in 13.g of Cu

Why?

To calculate how many moles does a sample of any element has, we need to use its atomic mass

We are working with Copper (Cu), so we need to find its atomic mass to calculate how many moles does 13.3 g of Cu contains.

So, calculating we have:

Cu=63.54\frac{g}{mol}

We have that there is 1 mol per 63.54 grams of Cu.

Now, converting we have:

13.3g*\frac{1mol}{63.54g}=0.209moles

We have that there are 0.209 moles of Cu in 13.g of Cu

Have a nice day!

3 0
4 years ago
Which cell component could be considered the distribution center of the cell?
Georgia [21]
Use this: https://quizlet.com/94519197/bio-ch1-flash-cards/ , it may help

7 0
3 years ago
Calculate the minimum mass of ammonia needed to produce 396 kg of ammonium sulfate, (NH4)2SO4, and excess sulfuric acid.
goldenfox [79]

Answer:

Mass =  101891.2 g

Explanation:

Given data:

Mass of ammonia needed = ?

Mass of ammonium sulfate produced = 396 Kg = 396 ×1000 = 396000 g

Solution:

Chemical equation:

2NH₃ + H₂SO₄      →      (NH₄)₂SO₄

Number of moles of  (NH₄)₂SO₄:

Number of moles = mass/molar mass

Number of moles = 396000 g / 132.14 g/mol

Number of moles = 2996.8 mol

Now we will compare the moles of ammonia and ammonium sulfate

               (NH₄)₂SO₄          :        NH₃

                      1                   :         2

                  2996.8            :        2/1×2996.8 = 5993.6 mol

Mass of ammonia needed:

Mass = number of moles × molar mass

Mass = 5993.6 mol × 17 g/mol

Mass =  101891.2 g

8 0
3 years ago
Is the speed of radio wave radiation higher or lower than infrared radiation
finlep [7]
<span>the speed of radio wave radiation is lower than infrared radiation</span>
5 0
3 years ago
What the answer I’m on a midterm and can’t seem to find it help
Sonja [21]

Answer:

Sorry I’m not rlly sure but maybe the 2nd or the last

Explanation:

8 0
3 years ago
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