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Lostsunrise [7]
3 years ago
8

True/False 1,atoms combines to form element 2, a physical changes is a change in the composition of as substance 3, physical pro

perties are used as a basis for identifying substance 4, a symbol stands for one atom of an element?​
Chemistry
2 answers:
olasank [31]3 years ago
6 0

Answer:

False

False

True

True

Tell me if my answers are correct

Explanation:

1,atoms combines to form element.

False/ atoms combines to form molecule

2, a physical changes is a change in the composition of a substance.

False/a physical changes is a change in the form of a substance.

3, physical properties are used as a basis for identifying substance.

True

4, a symbol stands for one atom of an element.

True

Good Luck!

viktelen [127]3 years ago
3 0

Answer:

  1. True
  2. False
  3. true
  4. false

Explanation:

hope it helps .

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Does a laboratory balance measure mass or weight
kolezko [41]
A balance in a lab measures the weight of a substance or object.
Weight is the mass of the body x the gravitation pull on the mass of the object.

So the mass of the object can be found by dividing the weight by gravitational constant.

The gravitational constant on earth is 1. so if a balance says that a substance weighs 300g then its mass is also 300g on earth because 300/1 = 300.

Hope that helps :)
5 0
3 years ago
How can you estimate the pH range of an indicator’s color change? Why do some indicators have two separate pH ranges?
erastova [34]

The color change of a pH indicator is caused by the dissociation of the H+ ion from the indicator.

<h3 /><h3>What is indicator?</h3>

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4 0
1 year ago
How much water can be raised from 25*C (room temperature) to 37*C (body temperature) by adding the 2,000 kJ in a Snickers bar?
yuradex [85]

Answer:

m = 39834.3 g

Explanation:

Given data:

Mass of water raised = ?

Initial temperature = 25°C

Final temperature = 37°C

Energy added = 2000 Kj (2000 ×1000= 2000,000 j

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

ΔT =  37°C - 25°C

ΔT = 12°C

c = 4.184 g/j.°C

Q = m.c. ΔT

2000,000j = m .4.184 g/j.°C. 12°C

2000,000j = m. 50.208 g/j

m =  2000,000j / 50.208 g/j

m = 39834.3 g

6 0
2 years ago
The initial temperature of a 1.00 liter sample of argon is 20 Celsius. The pressure is decreased from 720 mm Hg to 360 mm Hg and
Rasek [7]

Answer:314k

Explanation:

4 0
3 years ago
Because a water molecule has a negative end and a positive end it displays?
Diano4ka-milaya [45]

Answer:

A water molecule displays polarity by having negative and positive ends. Due to this charge difference, a water molecule is called a dipole.

Explanation:

8 0
2 years ago
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