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weeeeeb [17]
3 years ago
7

NEEED HELP NOW

Chemistry
2 answers:
AVprozaik [17]3 years ago
7 0

Answer:

B. Looking for improvements

Explanation:

took the quiz and got in right on a pex

levacccp [35]3 years ago
6 0

Answer: looking for improvements

Explanation:

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PLS HELP THIS IMPORTANT
Ksenya-84 [330]

Answer:

Explanation:

Physical change is a temporary and reversible change in which the physical properties of the substance changes without altering the composition of the substance Eg Melting of ice while chemical change is a permanent and not so easily reversible change in which the identity of the substance is altered to produce one or more substances Eg Combustion

8 0
3 years ago
Read 2 more answers
In the periodic table we use today, the elements are arranged by increasing mass. True or false
guapka [62]

99% sure its false

its arranged by atomic number now i believe

5 0
3 years ago
Time that is measured in definite periods such as minutes, day,and years is called
aleksley [76]

Answer:

1. relative time

2.absolute time

Explanation:

Time that is measured in definite periods such as minutes, days, and years is called

a. Relative time.

b. absolute time.

7 0
3 years ago
You know that 8.9 moles of solute particles are dissolved in that liquid solution. If the molarity of the solution is 25 M, how
pychu [463]

Answer:

V = 0.356 L

Explanation:

In this case, we need to use the following expression:

M = n/V (1)

Where:

M: molarity of solution (mol/L or M)

n: moles of solute (moles)

V: Volume of solution (Liters)

From these expression, we can solve for V:

V = n/M  (2)

Now, replacing the given data we can solve V:

V = 8.9 / 25

V = 0.356 L

5 0
3 years ago
When 50.0 g of 0.200 M NaCl(aq) at 24.1 °C is added to 100.0 g of 0.100 M AgNO3(aq) at 24.1 °C in a calorimeter, the temperature
Annette [7]

Answer:

Q = 693 J

Explanation:

NaCl (aq) + AgNO₃ (aq) → AgCl (s) + NaNO₃ (aq)

Q = mcΔT

Q: heat

m: mass

c: specific heat

ΔT: temperature variation

Q = (50.0g + 100.0g) x (4.20 J/g°C) x (25.2°C - 24.1°C)

Q = 693 J

4 0
3 years ago
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