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aleksandrvk [35]
3 years ago
10

What do animals mean to you?

Chemistry
1 answer:
Charra [1.4K]3 years ago
6 0
A would be the answer
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Explain how air pressure keeps a balloon infalted?​
Contact [7]

Answer:

Blowing up a balloon involves forcing additional air particles from your lungs into the balloon. These particles hit the inside walls of the balloon creating enough air pressure to force the rubber of the balloon to expand and the balloon to inflate.

Explanation: hopes it helps :)

4 0
3 years ago
Complete the sentence:<br><br> A heterotroph can't make it's own food, but...
aksik [14]
Autotroph CAN make it's own food. For example: plants- they feed of itself
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The mass of 0.0321 moles of Ca (CN)2
a_sh-v [17]

The mass of Ca(CN)2 : 92,11 g/mol

<h3>Further explanation</h3>

Given

0.0321 moles of Ca(CN)2

Required

The mass

Solution

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

mol(n) = mass(m) : MW(molecular weight)

Input the value :

mass = mol x MW Ca (CN)2

mass =  0.0321 x 92,11 g/mol

mass = 2.957 g

5 0
3 years ago
True or False? Buoyancy is an upward force exerted by a fluid on a submerged object.
Lemur [1.5K]
True, buoyancy is the force a fluid exerts upon an object on its surface.
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An element's atomic number is 87. how many protons would an atom of this element have
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atomic number is equal to proton number
so the proton number will be 87
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4 years ago
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