A(n)_________ test only one factor at a time

I'm seeking to ASK A QUESTION in accordance to the scientific method.

WHAT IS SCIENTIFIC METHOD:

The steps involved in the scientific method, which begins with making an observation, are as follows:

According to this question, after observing something about the world and I want to investigate it further by asking a question as the next step.

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Answer:

You use a magnet and the fillings will go with the magnet.

Answer:

Regions of the Electromagnetic Spectrum

Wavelength (m)Frequency (Hz)Radio> 1 x 10-1< 3 x 109Microwave1 x 10-3 - 1 x 10-13 x 109 - 3 x 1011Infrared7 x 10-7 - 1 x 10-33 x 1011 - 4 x 1014Optical4 x 10-7 - 7 x 10-74 x 1014 - 7.5 x 1014

Answer: Isotope-1: Hydrogen (H)

Isotope-2: Deuterium (H)

Explanation: The periodic table shows that the smallest element in hydrogen (H), at an average atomic weight of 1.008. Hydrogen-1 has one proton, one electron, and no neutrons, which adds to 1 AMU. Hyrogen-2 is an isotope of hydrogen that contains 1 neutron in addition to the proton, bringing the mass to 2 AMU. It is only at 0.0156% abundance on Earth and is given the name Deuterium, sometimes refered to as "heavy water" when incorporated into a water molecule. A third isotope has 2 neutrons, and is called Tritium.

Answer:

The answer is a compound.

it is a compound as it contains different elements

Explanation:

Answer:

Complex permanent tissue is defined as a collection of structurally dissimilar cells performing a common function or set of functions.

its functions are:

1.help in the transportation of organic material, water, and minerals up and down the plants.

2.it helps in transportation of food from leaves to other parts of plants.

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Answer:

The systematic representation for the distribution of electrons in different energy levels of an atom or orbital of an atom is called electronic configuration .

The electronic configuration of chlorine is 1s^2,2s^2,2p^6,3s^2,3p^6

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The density of the piece of metal is 2.12g/mL

HOW TO CALCULATE DENSITY:

Density (g/mL) = mass (g) ÷ volume (mL)

Density = 23.5/11.1

Density = 2.12g/mL

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When NaCl is added to a solution of AgNO₃, Pb(NO₃)₂, or Ca(NO₃)₂,a precipitate will form only in Ca(NO₃)₂ only.

In a double displacement reaction, the reacting substances exchange their ions or bonds and form new compounds

In a double displacement reaction, only ionic compounds can take part and  compounds of only those metal reacts which will be almost having equal reactivity.

For example -

Sodium chloride can react with Potassium sulphate to form Sodium sulphate and Potassium chloride.

Barium nitrate can react with Lead sulphate to form Barium Sulphate and Lead nitrate.

Therefore, When NaCl is added to a solution of AgNO₃, Pb(NO₃)₂, or Ca(NO₃)₂,a precipitate will form only in Ca(NO₃)₂ only.

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Answer:

C and D

Explanation:

A reaction is said to be decomposed, if the reactant is broken down to liberate single element.

Explanation:

The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart

Nguyên tố hóa học, thường được gọi đơn giản là nguyên tố, là một chất hóa học tinh khiết, bao gồm một kiểu nguyên tử, được phân biệt bởi số hiệu nguyên tử, là số lượng proton có trong mỗi hạt nhân.

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Hand tools in need of repair or replacement create hazards. Tools with wooden handles, like hammers and axes, can splinter or break in the middle of use, resulting in injury. Impact tools like chisels are unsafe for use if they have “mushroomed” heads because they could shatter on impact and cause injury.

Answer:

big ablsolty long pp

Explanation:

dong

Answer:

Molecules of H2O

Explanation:

Frost is condensed vapour and vapour is gaseous water. So, their particles are made up of same particles as water, i.e., H2O.

Answer:

an element with a large number of valence electrons and a large atomic radius

Explanation:

Electronegativity means a tedency when an atom attracts bonding electrons in a covalent bond situation.

» If an atom has many valency electrons [ empty orbitals in outermost shell ], it has difficulty in attracting electrons hence electronegativity low.

» If an atom is large, its nuclear attraction force of incoming electrons is low hence low electronegativity.

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The element that would have the lowest electronegativity is an element with a small number of valence electrons and a large atomic radius.

Both electronegativity and atomic radius are periodic trends. Electronegativity increases across the period while atomic radius decreases across a period.

An element that has a small number of valence electrons and a large atomic radius will most likely be a metal hence it will have the lowest electronegativity.

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Answer:

d

They do not depend on the amount of substance you have.

Intensive properties useful for identifying a substance because they do not depend on the amount of substance you have.

WHAT ARE INTENSIVE PROPERTIES:

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Answer: yes because it talks about what he pacifically he did and what the results was and he would probably need 2 get a little more data

Explanation:

Answer:

orange

Explanation:

The color of potassium hepaoxodichromate is orange.

Answer:

it's very bright red orange in color.

Explanation:

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:DD

Answer:

I hope it will help you

Explanation:

I believe that the answer to your question is letter D, normal line.

Additionally, according to the law of reflection, the angle of incidence is equivalent to the angle of reflection. This means that the angle of reflection is the angle between the normal line and the reflected ray.

I hope that this has helped you. Good day to you.

Answer:

1)physical change

Explanation:

2)chemical change

Cocoa butter, the fat in chocolate, can crystallize in any one of 6 different forms (polymorphs, as they are called). Unfortunately, only one of these, the beta crystal (or Form V), hardens into the firm, shiny chocolate that cooks want. Form VI is also a stable hard crystal, but only small amounts of it form from the good beta (Form V) crystals upon lengthy standing. When you buy commercial chocolate it is in the form of beta crystals.

When you melt chocolate and get it above 94° F, you melt these much desired beta crystals and other types of crystals can set up. If you simply let melted chocolate cool, it will set up in a dull, soft, splotchy, disgusting-looking form. Even the taste is different. Fine chocolate has a snap when you break it and a totally different mouthfeel from the other cocoa butter forms.

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Answer:

cryolite

Explanation:

B B B B B

cryolite is the answer

Answer:

The valency of a molecule is zero.

Explanation:

Valency is calculated by calculating number of electrons present in outermost orbitals of atom of element.

Answer:

Matter:

toothpaste

gasoline

bacteria

cell

Not matter:

happiness

sound

Explanation:

Matter is something that has mass and volume. Happiness is just a feeling, it doesn't exist in 3d world. Sound is a wave or just the movement of matter (particles of matter). Others have masses and volumes.

Answer:

?

Explanation:

did you mean kilograms?

Answer:

the surface area of a solid reactant.

temperature.  

presence/absence of a catalyst.

Answer:

Compound 1:   CO2

Compound 2:  CO

Explanation:

The attachment illustrrates the calculations.  The masses of both C and O are converted into moles of those two elelements and the resulting mole values are taken as ratios of the two elements.  Compound 1 has twice as many moles of O as of C, so it's empirical formula must be CO2.  Compound 2's O/C ratio is 1, so it becomes CO.