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3 years ago

How do you determine the chemical reactivity for metals using the periodic table?

1 answer:

8 0

You can know the metal with low reactivity and the metal with high reactivity from the periodic table, as in metals the Chemical reactivity increases by going down a group, because of the farther down group we go the easier of lose and gain of electrons or the easier the electrons to be given or taken, this caused the chemical reactivity be higher.
- and the chemical reactivity decreases as we go across the period because they want to give away valence electrons, they need more energy to get rid of them.

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Comets _____. orbit the Earth are usually found between Jupiter and Mars have very irregular shapes have very elliptical orbits

AURORKA [14]

Answer:

Asteroids???? idk and its not a guaranteed answer

7 0

4 years ago

The production of water proceeds according to the following equation.

ExtremeBDS [4]

The production of water proceeds according to the following equation. 2H2(g) + O2(g) → 2H2O(g). Which describes a way to speed up the collisions between hydrogen and oxygen molecules to produce more water?

Answer: Out of all the options shown above the one that best describes a way to speed up the collisions between hydrogen and oxygen molecules to produce water is answer choice C) Place the reactants in a smaller container.

I hope it helps, Regards.

6 0

3 years ago

Read 2 more answers

Alpha helices are a type of secondary structure in proteins. What is the length of a 33.0 kDa single‑stranded α‑helical protein

WARRIOR [948]

Answer:

450 Å

Explanation:

The amino acids in an α-helix are arranged in a right-handed helical structure where each amino acid residue corresponds to a 100° turn in the helix, and a translation of 1.5 Å (0.15 nm) along the helical axis

Mass of protein= 33.0 kDa

33.0 kDa ×(1000Da/kDa) × ( 1 residue/ 110 Da)

=33.0 ×1000 × 0.0091

= 300 residues

300 residues × (1.5Å /residue)

=450 Å

7 0

3 years ago

Methods of Heat Transfer HW

san4es73 [151]

The given statements are radiation, convection and conduction, all warmness are convection while conduction is cold.

<h3>Briefing :</h3>

Your hand touches the burner on the stove. Radiation

Magma in the earth's mantle heats up and rises, then cools and sinks which causes Earth's tectonic plates to move. Convection

You feel the warmth of the sun on a warm summer day. Radiation

The warm water near the equator moves towards the cold water near the earth's poles. This phenomenon is known as a global ocean current. Convection

You accidentally touch the hot part of the iron. Radiation

The soup on the bottom of a pot heats up by touching the pan. Conduction

Hot soup moves to the top of the pot and cool soup sinks to the bottom. Convection

Your tongue touches a very cold spoon. Conduction

The hot pavement heats up the air directly above it. Convection

The warm air over land, moves towards the cooler air over the ocean which causes a windy breeze. Convection

To know more about earth's mantle :

brainly.com/question/11648219

#SPJ9

3 0

1 year ago

Tate the law of conservation of mass. Then apply the law to this question: What would be the total

Savatey [412]

The law of conservation of mass states that, "Mass can neither be created nor destroyed, only its form changes with respect to different forms of energy." In any reaction, say 10 gms of water is decomposed into its constituents Hydrogen and Oxygen. But the mass remains conserved for the reaction. Although mass and energy are inter-convertible. But,the net mass/energy remains conserved i.e. the mass of products will be equal to the mass of reactants.

5 0

3 years ago