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Art [367]
3 years ago
9

Identifying Changes of Matter

Chemistry
1 answer:
Lapatulllka [165]3 years ago
4 0
Boiling water, freezing matter and an exploding dynamite. Your welcome
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What is 0.000028474 in scientific notation
antiseptic1488 [7]

Answer:

2.8474 \:  \times  \:  {10}^{ - 5}

this the solution

6 0
3 years ago
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An earthworm is slithering on a sidewalk towards a grassy lawn which organelles activity contributes most directly to muscle con
givi [52]

Answer:

3. Mitochondria

Explanation:

Numerous mitochondria are found in each muscle cell to provide metabolic energy for muscle contraction.

hope i helped (:

5 0
2 years ago
Given 0.02 of KF, how many liters of solution are needed to make a 7.2 solution?
Dmitry_Shevchenko [17]

Answer:

1/360

Explanation:

let x = liters

molarity=moles of solute/liters of solution, 7.2=0.02/x or 7.2=(1/50)(1/x), 7.2(50)=(1/x), 360(x)=1, x=1/360

7 0
3 years ago
A flexible container at an initial volume of 5.120 L contains 8.500 mol of gas.
SOVA2 [1]

Answer:

30.05 mol

Explanation:

solving the proportion

V1 / n1 = V2 / n2

5.120 L            18.10 L

–––––––– = ––––––

8.500 mol         x

x = 30.05 mol

6 0
2 years ago
How much heat in joules is required to heat a 43g sample of aluminum from an initial temperature of 72˚F to a final temperature
Stels [109]
The first step to answering this item is to convert the given temperatures in °F to °C through the equation,

   °C = (°F - 32)(5/9)

initial temperature: 72°F

    °C = (72 - 32)(5/9) = 22.22°C

final temperature: 145°F
   
    °C = (145 - 32)(5/9) = 62.78°C

Substituting to the equation,

    H = mcpdT
    
    H = (43 g)(0.903 J/g°C)(62.78 - 22.22)
   
   H = 1574.82 J

<em>Answer: 1574.82 J</em>
3 0
3 years ago
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