2. The smaller numbers in the image below
represent
-2H
2
a) I don't know, and don't want to try
b) Coefficients
c) Subscripts
d) none of the answers are correct

Answer:

1. Covalent bonds can form between two nonmetal atoms.

2. Covalent bonds can form between atoms of the same element.

3. Covalent bonds can form between atoms of different elements.

Explanation:

I hope this helps u! :D



Explanation:

Answer:

increases

Explanation:

it turns out that an object increases as the square of it's speed.

Answer:

Explanation:

In all physical processes taking place in closed systems, the amount of change in kinetic energy is equal to the amount of change in potential energy. If the kinetic energy increases, the potential energy decreases, and vice-versa. this equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. so therfore stays the same as the object so it would speed up as well.

Answer:

I'd imagine it would look like a snowflake pretty much see through and microscopic

Answer:

yes

Explanation:

Answer:

I am pretty sure it is the first one: Melting, cooling and hardening

Explanation:

igneous rocks are made of molten lava and then they cool down and harden  form into a rock. PLEASE correct me if i am wrong.

Answer:

Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.

Explanation:

Hope it helps

Answer:false

Explanation:

Answer:

See explanation

Explanation:

First of all, the student has not represented the formula of the nitrite ion correctly. The formula of the nitrite ion is represented as NO2^- whereas the student wrote N,O2.

Then, the charge on magnesium ion has been correctly designated as +2 while the charge on the nitrite ion is correctly designated as -1. Now, the ions can exchange valencies (without signs and we now write them as subscripts) to yield Mg(NO2)2.

Answer:

1.KCl is answer

Explanation:

when potassium chloride KCl is dissolved in water,it will dissociate to form k+ and cl- .thus,the solute must be k+Cl- .

I hope it's helpful!

The substance dissolved in a solvent or water is called a solute it makes up the homogenous mixture called solution by getting dissolved in it.

The [tex]\rm KCl[/tex] is the solute in the aqueous solution of [tex]\rm KCl[/tex].

Therefore, option A, [tex]\rm KCl[/tex] is the solute.

Learn more about solute and solvent here:

https://brainly.com/question/14521586

Mass of water produced : 0.146 g

Given

33.2 mL of 0.245 M lithium hydroxide

Required

mass of water

Solution

Reaction

HNO₃ (aq) + LiOH (aq) → H₂O (l) + LiNO₃ (aq)

mol LiOH :

= M x V

= 0.245 x 33.2 ml

= 8.134 mmol

From the equation, the mol ratio of HNO₃ : H₂O = 1 : 1, so mol H₂O = 8.134 mmol

mass H₂O :

= mol x MW

= 8.134 x 10⁻³ mol x 18 g/mol

= 0.146 g

Answer:

Solubility may be stated in various units of concentration such as molarity, molality, mole fraction, mole ratio, mass (solute) per volume (solvent) and other units. The extent of solubility ranges widely, from infinitely soluble (without limit) ( miscible) such as ethanol in water, to poorly soluble, such as silver chloride in water.

Explanation:

Answer:

i think b(proton and neutrons)

Answer:

Because half filled sub levels are more stable than partially filled sub levels

Explanation:

The reason for the exceptional configuration found in some atomic orbitals is due to the special stability of half-filled sub-levels over partially filled ones.

One of the characteristic thing about filling some atomic orbitals we have to bear in mind that there is a stability conferred on an atom by being partially filled.

The energy needed to remove an electron from a half-filled configuration or inert gas configuration is very great.

This is why when there is a choice to have half-filled orbitals, it is desirous to go for this configuration.

Answer:

Explanation: The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance

Answer:

C. 312

Explanation:

Answer:

C-312

EDGE 2021

Explanation:

Answer:

Conduction

Explanation:

Answer:

(d) Gases and water vapour

Explanation:

The atmosphere is a part of the Earth that contains predominantly gases or gaseous substances. In other words, the atmosphere is a combination of different gases, including water vapour.

Atmosphere is said to contain the following gases in the following proportion:

- Nitrogen (78%)

- Oxygen (21%)

- Argon (0.9%)

- Carbon dioxide (0.04%)

- Water vapour (1-4%)

Therefore, the Earth's atmosphere consists of many gases and water vapour.

Answer:

0J

Explanation:

The potential energy of the sitting puppy is 0J.

Since we have been given the mass of the puppy to be 3kg, to find the potential energy, we use the expression below:

 Potential energy  = mgh

m is the mass

g is the acceleration due to gravity

h is the height

 So the puppy is sitting on the grass, the height is 0m

Therefore, Potential energy is 0J

Answer:

False

Explanation:

Answer:

To find out if a sample has baking soda we can add vinegar.

Explanation:

When vinegar (acetic acid) is mixed with salt (sodium bicarbonate), water, carbon dioxide and sodium acetate are formed. We see the formation of bubbles (which is carbon dioxide, which is a gas).

Answer:

What is the investigation?

Explanation:

Answer:How many ions are in 2 moles of NaCl?

2 mol NaCl = 2 x 6.02 x 10 23 = 1.204 x 10 24 NaCl formula units 2 mol NaCl = 2 (2 x 6.02 x 10 23 )= 2 (1.204 x 10 24) = 2.408 x 10 24 atoms *2 moles of sodium chloride contains 2.408 x 10 24 ions (combination of Na + ions & Cl – ions). H

Explanation:

sorry i was running out of time

Answer:

There is nothing attached to this question so I unfortunately cannot help you

Explanation:

Answer:

D. Time and pressure changes dead plant material to peat.

Explanation:

There are four steps in the production of coal: peat, lignite, bituminous and anthracite.

Peat: in this stage dead plants are oxidized to water and carbon dioxide and buried under sediments. The partial decomposition of plant matter due to the absence of oxygen is called peat. There is no factor of time and pressure that changes dead plant material to peat.

Lignite: Peat is subjected to heat, pressure, and time to form lignite.

Bituminous: More pressure in lignite removes all the traces of plant matter and form “soft coal”, bituminous coal.

Anthracite: It is the last stage, in which hard coal forms with the combined pressure and high temperature.

Hence, the correct answer is "D. Time and pressure changes dead plant material to peat."

Mass of NaCl : 5.85 g

Given

5.3 g Sodium carbonate (Na₂CO₃)

Required

Mass of NaCl

Solution

Reaction

Na₂CO₃ + 2HCl ⇒ 2NaCl + H₂O + CO₂

mol of Na₂CO₃ (MW=106 g/mol) :

= mass : MW

= 5.3 g : 106 g/mol

= 0.05

From the equation, mol ratio Na₂CO₃ : NaCl = 1 : 2, so mol NaCl :

= 2/1 x mol Na₂CO₃

= 2/1 x 0.05

= 0.1

Mass of NaCl (MW=58.5 g/mol) :

= mol x MW

= 0.1 x 58.5

= 5.85 g

A stellar spectrum can reveal many properties of stars, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.

Answer:

High melting point

Explanation: toook the quiz

Answer:

1.38 moles

Explanation:

My teacher gave us the answer on a quiz so here if y’all want a explanation I’ll give y’all one tho

Answer:

i actually dont know

Explanation: