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Art [367]
3 years ago
6

There is always some between any surfaces that are in contact with each other.

Chemistry
1 answer:
exis [7]3 years ago
4 0

Answer:

pls brain list me :(

Explanation:

Friction. Friction

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What is the name of the element with the atomic number 79
natima [27]
Look it up, it’s not that hard.
6 0
3 years ago
What mass of hydrogen is produced when 49.0 grams of sodium reacts with 30.0 grams of water
nekit [7.7K]

Answer:

the mass of the products must equal the mass of reactants. which means the total mass is 10 grams.

Explanation:

4 0
3 years ago
A + B -&gt;C<br><br><br>Which situation best describes the effect of a limiting reactant?
anygoal [31]

Answer:

The Limiting Reactant is the reactant that when consumed the reaction stops.

Explanation:

7 0
3 years ago
Ben walks 500 meters from his house to the corner store. He then walks back toward his house but stops to talk to a neighbor whe
Arada [10]

Answer:

Average velocity = 0.3 m/s.

Explanation:

Given data:

Total distance from house to store = 500 m

Distance he traveled from store and stop before reached to house = 200 m  

Total time taken = 910 sec

Average velocity = ?

Solution:

Formula:

Average velocity = displacement / time

Displacement = distance from start - end point

Displacement = 500 m - 200 m = 300 m

Average velocity = 300 m/ 910 s

Average velocity = 0.33 m/s

Average velocity = 0.3 m/s.

7 0
3 years ago
21) What is the mass of 5.22 moles of Na 2 CO 3
german

Answer:

5.22 moles of Na₂CO₃ have mass of 553.22 g

Explanation:

Given data:

Mass of Na₂CO₃ = ?

Number of moles of Na₂CO₃ = 5.22 mol

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of Na₂CO₃ = 105.98 g/mol

Mass = 5.22 mol  ×  105.98 g/mol

Mass = 553.22 g

Thus, 5.22 moles of Na₂CO₃ have mass of 553.22 g.

4 0
3 years ago
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