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german
3 years ago
12

1. Everything that takes up space and has mass is called_________

Chemistry
1 answer:
vitfil [10]3 years ago
4 0
Weight
Area
Matter
Mass
Weight
These are probably wrong of course they are not all right but I know at least one is.
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5. How much heat (in calories) is absorbed by a reaction when
Wewaii [24]

Answer:

1.2 × 10⁴ cal

Explanation:

Given data

  • Mass of water (m): 300 g
  • Initial temperature: 80 °C
  • Final temperature: 40°C

We can calculate the heat released by the water (Q_w) when it cools using the following expression.

Q_w = c \times m \times (T_f - T_i)

where

c is the specific heat capacity of water (1 cal/g.°C)

Q_w = \frac{1cal}{g.\°C}  \times 300g \times (40\°C - 80\°C) = -1.2 \times 10^{4} cal

According to the law of conservation of energy, the sum of the heat released by the water (Q_w) and the heat absorbed by the reaction (Q_r) is zero.

Q_w + Q_r = 0\\Q_r = -Q_w = 1.2 \times 10^{4} cal

7 0
2 years ago
1. What is a food web?
Anuta_ua [19.1K]

Answer:

a producer and consumer relationship how several food chains and related.

5 0
2 years ago
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Pubhvcghbb<br> Jgyukbcu?
tino4ka555 [31]

Answer:

WHAT??

Explanation:

3 0
3 years ago
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What types of chemical bonds?​
DaniilM [7]

Answer:

I am confused as to what you're asking.

7 0
3 years ago
Which description of salt is a physical property?
Genrish500 [490]

Answer:

salt is dull and brittle and conducts electricity when it has been dissolved into water, which it does quite easily.

Explanation:

transparent and colourless in crystalline form- rather like ice.

4 0
2 years ago
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