What properties you can observe or measure?

Answers

Answer 1

Answer: We can observe physical properties of elements and compounds without changing the substance.

Examples of physical properties: Density, color, boiling point, state of matter, appearance: dull or shiny, etc.

But we can also observe and measure chemical properties by reacting a substance with something else. For example, like mixing baking soda and vinegar together. The vinegar reacts with the baking soda and produces carbon dioxide: a new substance.

Some examples of chemical properties: Flammability, amount of heat that is released during combustion, toxicity (how much damage it causes to other organisms), radioactivity, and ability to oxidize (when you have metal that becomes rusty looking).

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Identify the terms,like terms,coefficients and constants

2+3a+9a

Answers

Like terms : 3a and 9a

Terms: All of them

Coefficients: 3 and 9

Constant : 2

Like terms in algebra are terms that have the same variables and power. Constants contain only numbers, we call them constants because their values don't change. Coefficients are the numbers in front of the variable ex: 5y in that expression 5 is the coefficient. So in the expression 2+3a+9a there is one constant which is 2 the likes terms are 3a and 9a because they have the same variable. And the coefficients are 3 and 9 because they are in front of the variable.

Physical and chemical properties

what is density when mass is 5.2 and volume is 0.117

Answers

Density = mass / volume

D = 5.2 / 0.117

D = 44.44

What is the difference between relative humidity and humidity?

Answers

Relative humidity tells you how much water vapor is in the area. Humidity is like a ratio of absolute humidity and the potential amount of water saturation that may be in an area.

1. What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.30 m?

Answers

The wave speed of a wave consist of frequency of 100 Hz and a wavelength of 0.30 m is 30 m/s.

What is Wave speed of a wave?

Wave speed is referred to the distance a wave travels in a particular amount of time, such as the number of meters it travels per second.

Speed = wavelength (λ) × frequency (ν).

Given wavelength = 0.30 m and frequency= 100 Hz

Wave speed = 0.30 × 100 = 30 m/s

So, the wave speed of the wave is 30 m/s.

Learn more about wavelength, here:

brainly.com/question/7143261

Answer: The wave speed of the wave is 30 m/s

Explanation:

Wave speed is defined as the product of its wavelength and frequency.

Mathematically,

$\text{Wave speed}=\lambda* \nu$

where,

$\lambda$ = wavelength of the wave = 0.30 m

$\nu$ = frequency of the wave = 100 Hz = $100s^(-1)$

Putting values in above equation, we get:

$\text{Wave speed}=0.30m* 100s^(-1)\n\n\text{Wave speed}=30m/s$

Hence, the wave speed of the wave is 30 m/s

Which quantity represents the number of protons in an atom?(a) atomic number
(b) oxidation number
(c) number of neutrons
(d) number of valence electrons

Answers

The atomic number is equal to the number of protons in an element.
The oxidation number and valence electrons can vary depending on whether it is an ion or not. The number of neutrons can also vary depending on what isotope the atom is. However, the number of protons cannot be changed without changing the identity of the base atom itself.

The answer is (a) atomic number

Atomic number = no. of protons = no. of electrons

What are some facts about ionic bonding?
I need some information for my poster

Answers

- they are always formed by a cation and a anion

- they transfer electrons rather than shared

- all are binary ionic compounds are solids

- they are neutral i.e. no charge

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