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harina [27]
3 years ago
6

Is mass conserved in chemical reactions? Make a prediction based on this question. Be sure to tell how you would determine wheth

er or not mass was actually conserved.
Chemistry
1 answer:
Lady_Fox [76]3 years ago
3 0

In chemical reactions mass is always conserved. we sum all of the mass before and after reaction and it should stay the same.

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When the metallic element sodium combines with the nonmetallic element bromine (Br2), is the product a solid, liquid, or gas at
Luden [163]

Answer: it is a solid at room temperature.

Explanation:

The ions of the two reactants are Na{+} and Br{-}, so the formula of the product is NaBr.  

and when the NaCl is a solid a room temperature. and when NaBr has similar properties to NaCl, so NaBr is a solid at room temperature too.

so our chemical formula for the product is NaBr and It's a solid at room temperature.

4 0
3 years ago
1. State how increasing the temperature of a gas changes its volume, assuming pressure is held
vredina [299]

Explanation:

the volume and temperature of a gas have a ditect relationship,as the temperature increases the volume also increases when pressure is held constand, heating the gas increases the kinetic energy of the particles or atoms,causing the gas to expand until the pressure returns to its original value

7 0
3 years ago
As you move down through the family of alkali metals, the first ionization energy ________ because
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I’m pretty sure the answer is B
5 0
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Lithium iodide has a lattice energy of −7.3×102kJ/mol and a heat of hydration of −793kJ/mol. Find the heat of solution for lithi
Anna007 [38]
Delta H of solution = -Lattice Energy + Hydration 
<span>Delta H of solution=- (-730)+(-793) </span>
<span>Delta H of solution= -63kJ/mol </span>

<span>Now we find moles of LiI: </span>
<span>10gLiI/133.85g=.075moles </span>
<span>multiply moles to the delta H of solution to cross cancel moles. .75moles x -64kJ/mol =4.7</span>
7 0
3 years ago
Read 2 more answers
"What are genetic disorders, and how do they influence human growth and development​
Morgarella [4.7K]

Answer:

Genetic disorders is an illness caused by abnormalities in genes or chromosomes.The cells of all mammals contain approximately the same amount of deoxyribonucleic acid (DNA).

Explanation:

Mammals are affected through an increase in the number of cells and not in their size.

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3 years ago
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