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Gelneren [198K]
3 years ago
15

what do the colors produced by fireworks indicate? a. a physical change c. a state change b. a chemical change d. an element cha

nge
Chemistry
1 answer:
Nat2105 [25]3 years ago
6 0
B. A chemical change 
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Help me out will ya?
vampirchik [111]

Answer:

  1. Option C) the chance of water-borne diseases.

Explanation:

When a <em>flood </em>happens, water will lpotentially get contaminated by several causes which include the overflow of untreated wastewater, the decomposition of the carcasses of animals and people, and the chemical contamination from industries.

In general, biochemical and chemical hazards are present in the water, after a flood, which means that the authorities and population should take extreme care for the use and intake of water: chemical treatment (use of chlorine), boil water. As usual, children and the elderly are the most at risk in those conditions.

6 0
3 years ago
HELP PLZ ASAP<br> will give brainliest
horrorfan [7]

Answer:

I believe that it would be the third option down.

Explanation:

The thermal energy is in constant motion in the COOLER room, and when the desired temperature in the room is reached, it stops.

8 0
3 years ago
An ice cream sundae is a(n)
Brrunno [24]

Answer:

A frozen dessert that tastes good and makes people happy

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Explanation:

5 0
3 years ago
Write a balanced equation to show the reaction of sulfurous acid with lithium hydroxide to form water and lithium sulfite
77julia77 [94]
H2SO3 + 2LiOH = 2H2O + Li2SO3
3 0
2 years ago
A student weighs an empty flask and stopper and finds the mass to be 53.256 g. She then adds about 5 mL of an unknown liquid and
Delvig [45]

Answer:

a. The pressure in the flask open to the atmosphere during the vaporization of the unknown liquid is equal to the prevailing atmospheric pressure equivalent to 0.957734 atm

Explanation:

The mass of the empty flask and stopper, m = 53.256 g

The volume of the unknown liquid she adds = 5 mL

The temperature of the water in which she heats up the flask = 98.8 °C = 371.95 K

The mass of the flask and the condensed vapor = 53.780 g

The volume of the flask, V = 231.1 mL

The atmospheric pressure, P = 728 mm Hg

a. We note that the student stoppers the flask after all the liquid has evaporated. Therefore, given that the flask was open to the atmospheric pressure as the liquid evaporates, the pressure of the vapor in the flask is equal to the prevailing atmospheric pressure, or 728 mmHg

Using a calculator, 728 mm Hg is equivalent to 0.957734 atm.

3 0
3 years ago
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