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xxTIMURxx [149]
2 years ago
14

Which of the following best describes weight? The amount of space an object takes up The amount of matter in an object The force

on an object due to its mass and gravity The force on an object due to its speed and location
Chemistry
1 answer:
Alenkasestr [34]2 years ago
4 0
The force of an object due mass and gravity.it can also be defined as the force exerted by gravity on a body
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Which of the following displays the correct change in enthalpy and best describes the reaction below? 2CsCl(aq) + Na2SO4(aq) 2Na
Bond [772]
We subtract the enthalpies of the reactants from that of the products:
2\Delta
 H(NaCl)+\Delta H(Cs_2 SO_4)-2\Delta H(CsCl)-\Delta H(Na_2 SO_4) \\ 
=2(-411)+(-1400) -2(-415)-(-1380) \\ = -12 kJ
Since this is < 0, this is an exothermic reaction.

3 0
3 years ago
How many grams are in 5.2 moles of Li2SO4
skelet666 [1.2K]

Answer:

572 g

Explanation:

Molar mass is the mass of 1 mol of an element or compound

molar mass of Li₂SO₄ is the sum of the products of the molar masses of the elements by the number of atoms in the compound

molar masses of each element making up lithium sulphate

Li - 7 g/mol

S - 32 g/mol

O - 16 g/mol

molar mass of Li₂SO₄ - (7 g/mol x 2) + ( 32 g/mol x 1) + ( 16 g/mol x 4 )

molar mass = 110 g/mol

mass of 1 mol of Li₂SO₄ is 110 g

therefore mass of 5.2 mol of Li₂SO₄ is - 110 g/mol x 5.2 mol = 572 g

mass is 572 g

7 0
3 years ago
A fish is removed from a contaminated lake. You determine that a particular toxin (X) is present in its cells at concentration X
netineya [11]
The level of toxins in the fish's cell is equivalent to the level of toxins in the water. Therefore, in order to reduce the toxins further, we should replace the now contaminated water with clean water. After the level of toxins in the fish's cell stops reducing, we replace the water with clean water once again.
3 0
2 years ago
When might you receive a blood transfusion<br><br><br> Help me pls
umka21 [38]

Explanation:

in the case of blood loss, you need blood from someone with your blood type or with universal donor type

5 0
3 years ago
HELP 20 Points? thank u guysssss
Fudgin [204]

Answer:

The answer is A. Chemical

Explanation:

Have a nice day

3 0
3 years ago
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