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Yuri [45]
3 years ago
5

Please write a essay and pick one prompt and at least half a page long thank you!

Chemistry
1 answer:
MArishka [77]3 years ago
3 0
Changes in matter occur every day. There are two types of ways matter can be altered; physically and chemically. Physical changes do not change the composition of the matter while chemical changes occur when one or more substances turn into a completely new substance. Physical changes can be seen through an altering of the substances physical property. A substances physical property is observed and measured without changing the composition of the subject. Descriptive words that would help to identify a substance’s physical property include hard, soft, brittle, flexible, heavy, and light just to name a few. Let’s say you’re eating, throughout the day your stomach starts to growl that is what happens when your stomach is digesting your food. Digestion is an example of chemical change. Chemical change happens every day and more than half the time we don’t realize it whether it’s metal starting to rust, or our food starting to rot. Physical change can happen when your popsicle starts to melt, or your water starting starting to boil. These are examples of physical change.
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You should only use your high-beam highlights when you are more than __________ feet behind another vehicle you are following.
11111nata11111 [884]
I think the ansewr is c.300 i hope this helps
7 0
3 years ago
Read 2 more answers
"The difference in our frame of reference between schools of wild Blue Fin Tuna and wild populations of many types of "land base
KengaRu [80]

Answer:

1. Wildlife

2. Seafood

Explanation:

1. Wildlife refers to the species which are not domesticated by the humans and they live as a wild organisms in the areas which are not interfered with the humans. In the given question, the wild creatures that live on the land therefore are considered a part of the wildlife.

2. Seafood refers to the species which are considered as food which humans get from the sea. In the given question, the Blue Fin fishes are considered a seafood therefore.

7 0
3 years ago
Convert .0150 km to meters and express the correct significant figures
weeeeeb [17]
<h3>Answer:</h3>

15.0 meters

<h3>Explanation:</h3>
  • Kilometers are units used to measure length.
  • Length is also measured using other units which include meters, centimeters, decimeter, millimeter, etc
  • To convert one unit to another we use conversion factors.

In this case to know inter-conversion between units of measuring length, we consider the following;

Kilometer(km)

10

Hectometer(Hm)

10

Decameter(dam)

10

Meter (M)

10

Decimeter (dm)

10

Centimeter (cm)

10

Millimeter (mm)

Therefore, to convert km to meter we use the conversion factor (10×10×10) 1000 m/km.

Thus;

0.0150 km is equivalent to;

= 0.0150 km × 1000 m/Km

= 15.0 meters

Thus, 0.0150 km is equivalent to 15.0 meters.

4 0
3 years ago
I need help pleaseeee
solmaris [256]

Answer:

1 is H

3 is NA

the one below 14 is SI

16 is O

the one below 17 is Ci

the one below 18 is NE

Explanation:

hope this helps!

6 0
3 years ago
Read 2 more answers
What volume does 1.5 x 10^24 molecules of CO2 occupy at STP?
Nookie1986 [14]

Answer:

The volume occupied by given molecules of carbon dioxide at STP is 55.86 L.

Explanation:

N=n\times N_A

Where:

N = Number of particles / atoms/ molecules

n = Number of moles

N_A=6.022\times 10^{23} mol^{-1} = Avogadro's number

We have:

N = 1.5\times 10^{24}

n =?

n=\frac{N}{N_A}=\frac{1.5\times 10^{24}}{6.022\times 10^{23} mol^{-1}}

n = 2.4909 moles

Using ideal gas equation:

PV = nRT

where,

P = Pressure of carbon dioxide gas = 1 atm  (at STP)

V = Volume of carbon dioxide gas = ?

n = number of moles of carbon dioxide gas =2.4909 mol

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of carbon dioxide gas = 273.15 K  (at STP)

Putting values in above equation, we get:

V=\frac{2.4909 mol\times 0.0821 atm L/mol K\times 273.15 K}{1 atm}

V = 55.86 L

The volume occupied by given molecules of carbon dioxide at STP is 55.86 L.

7 0
3 years ago
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