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Fantom [35]
3 years ago
10

Why does a soccer ball stop rolling in a soccer game which newton law shows that?

Chemistry
1 answer:
yaroslaw [1]3 years ago
7 0
I believe it is newton`s first law of motion
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What are the answers to these?
Eva8 [605]

Answer:

1)physical change

Explanation:

2)chemical change

7 0
3 years ago
a weather balloon is inflated to a volume 2.2 10square3 L with 374g of helium. what is the density of helium in grams per liter
Kruka [31]

Answer:

Density = 0.17 g/L

Explanation:

It is given that,

Volume of the inflated balloon filled with Helium, V=2.2\times 10^3\ L

Mass, m = 374 g

We need to find the density of helium. It is equal to its mass per unit volume. It can be given by :

d =m/V

d=\dfrac{374\ g}{2.2\times 10^3\ L}\\\\=0.17\ g/L

So, the density of helium in the balloon is 0.17 g/L.

5 0
4 years ago
A 0.465 g sample of an unknown compound occupies 245 ml at 298 k and 1.22 atm. what is the molar mass of the unknown compound?
nekit [7.7K]
<span>we can find the number of moles of gas using the ideal gas law equation
                                                                                                 
PV = nRT
                                                                                                 
where P - pressure - 1.22 atm
                                               
V - volume - 0.245 L
                                                                                               
n - number of moles
                                                                                               
R - gas constant - 0.08206 L.atm/mol.K
                                               
T - temperature - 298 K
                                                                                               
substituting the values in the equation
                                                   
1.22 atm x 0.245 L = n x 0.08206 L.atm/mol.K x 298 K
                                               
n = 0.0122 mol
                                                                                               
molar mass of compound = mass present / number of moles therefore molar mass = 0.465 g / 0.0122 mol = 38.1 g/mol
the answer is d) 38.0 g/mol </span>
6 0
3 years ago
Read 2 more answers
Based on the wintertime La Niña weather map, what do you think Florida's temperature and precipitation would be like during a wi
nika2105 [10]

Answer:

Temperature decreases and precipitation increases.

Explanation:

Temperature of Florida decreases and precipitation increases during a winter El Niño event. Due to El Niño event, precipitation occurs above average in Florida during Fall-Winter-Spring season. Storminess also increases during this El Niño event which increases the threat of severe weather in Florida during El Niño winters.

7 0
3 years ago
Which of the following combination of elements would result in covalent compound? * W X Y Z Vand X Wand Z Y and Z Wand y​
TEA [102]

Answer:

C. Y & Z

Explanation:

V, W are imaginary metals here because their valence electrons are typically less than 4. X, Y, Z are non-metals and have higher valence electrons. Here, if V or W bind with X, Y, or Z we make ionic bond (because metal + non metal = ionic). But, if X binds with Y or Z or any combinations of any two of the three non-metals results in covalent bond (non metal + non metal = covalent).

Thus, Y and Z make covalent.

4 0
3 years ago
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