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wel
3 years ago
8

What characteristic must be true of a good hypothesis

Chemistry
1 answer:
Lelechka [254]3 years ago
4 0
A hypotheses is a testable idea or explanation that leads to scientific investigation.
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PLEASE ANSWERRRRRRRRRRR
andrew11 [14]

Answer:

B if I remember right.

Explanation:

5 0
3 years ago
a piece of food is burned in a calorimeter that contains 200.0g of water. If the temperature of the water rose from 65.0°C to 83
Flauer [41]

Answer: 15062.4 Joules

Explanation:

The quantity of heat energy (Q) required to heat a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since,

Q = ?

Mass of food = 200.0g

C = 4.184 j/g°C

Φ = (Final temperature - Initial temperature)

= 83.0°C - 65.0°C = 18°C

Then, Q = MCΦ

Q = 200.0g x 4.184 j/g°C x 18°C

Q = 15062.4 J

Thus, 15062.4 joules of heat energy was contained in the food.

4 0
3 years ago
Instruction
MrRa [10]

Answer:

An object at position A. has all potential energy

An object at position B. has about half potential and half kinetic energy

An object at position C. has all kinetic energy

Explanation:

I already did it and got all of them correct. I hope this helped!! :)

5 0
3 years ago
How many mol of sodium hydroxide are required to make 1.35 L of 2.50 mL solution?
Nata [24]
3 and a half mL because
6 0
3 years ago
Bromine has two isotopes, Br79 and Br81. The isotopes occur in a 50:50 (1:1) ratio. Given that the mass spectrum of bromine cont
AlekseyPX

Answer:

There will be 3 peaks.

Relative height of the atomic peaks would be; 158, 160 and 162

Explanation:

We are told that Bromine has two isotopes namely 79Br and 81Br in a 1 : 1 ratio (50 : 50).

This means that a compound which contains 1 bromine atom will have two peaks in the molecular ion region but it depends on which bromine isotope is contained in the molecular ion.

Thus;

Relative height of atomic peaks is given by;

m/z = 79Br¯ 79Br+ = 158

79Br¯ 81Br+ = 160

81Br¯ 81Br+ = 162

7 0
3 years ago
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