plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz help :) ..

Answer: Na2C2O4 probably sodium oxalate

Explanation: assume you have 100 g substance.

Mass of Na is m(Na) = 34.31 g, m(C) = 17.93 g and m(O) = 47.76 g.

Calculate moles n(Na) = 34.31 g/22.99 g/mol= 1.49 mol.

For C n(C) = 1.49 mol and n(O) = 2.985. You divide all by 1.49 you

Get n(Na) : n(C) : n(O) = 1:1:2 M(NaCO2) = 67 g/mol.

Divide 134:67 = 2. You get formula Na2C2O4

Answer:

1=the 77 or and 57

Explanation:

Answer:

photosynthesis happens when spring is happening because of the pollen and soil

Explanation:

Answer:A

Explanation:

potential energy is stored energy and so the only option that isn’t moving or using energy is a

Answer:

[tex]E=5.16\times 10^{-19}\ J[/tex]

Explanation:

Given that,

The frequency of violet light, [tex]f=7.79\times 10^{14}\ Hz[/tex]

We need to find the energy of a photon. The formula for the energy of a photon is given by :

[tex]E=hf\\\\E=6.63\times 10^{-34}\times 7.79\times 10^{14}\\\\E=5.16\times 10^{-19}\ J[/tex]

So, the energy of a photon is equal to [tex]5.16\times 10^{-19}\ J[/tex].

Answer:

Explanation:

h

Answer:Protons are positively charged is the correct statement about an atom

I've also corrected the other statements

Atoms contain protons and neutrons in their nucleus

Neutrons posses no charge and are neutral

The nucleon number is the total number of protons and neutrons in a nucleus

Answer:

pulling objects with mass closer to each other

Explanation:

that is the only role of gravity

Answer:

it should test one variable at a time.

Explanation:                                                                                                  because you will not be able to tell which variable is responsible for the observed results.

Answer:

and unborn baby

Explanation:

an unborn baby

Answer:

Accelerate, Have Constant velocity, Velocity, and First

Explanation:

Got it right on edge. have a wonderful day!!!

From point A to point B, the car will . From point B to point C, the car will assuming the washer on the car is not blocked . It will examine Newton’s law will be "Accelerate, Have Constant velocity, Velocity, and First."

The link between an object's motion with even the forces acting on it is outlined by Newton's laws of motion, which were three fundamental principles of classical mechanics.

The displacement of the item in one unit of time would be the definition of velocity.

Therefore, from point A to point B, the car will . From point B to point C, the car will assuming the washer on the car is not blocked . It will examine Newton’s law will be "Accelerate, Have Constant velocity, Velocity, and First."

To know more Newton’s law and Velocity

https://brainly.com/question/27573481

#SPJ3

Answer:

Thomson's atom model.

Explanation:

His model is the plum pudding model of an atom. There are negatively charged subatomic particles or electrons placed within positively charged matter.

Hope this helps!

Answer:

C) polar covalent bonds

Explanation:

Polar covalent bonding can be regarded as a chemical bond that involves a pair of electrons which is

unequally shared between two atoms.

The electron are not shared equally as a result of one of the atom spending more time with the electron compare with the other atom. It is one whereby atoms having different electronegativities involves themselves in sharing electrons in a covalent bond

Answer:

Kinetic energy, form of energy that an object or a particle has by reason of its motion.

Explanation:

a shorter one

Answer:

is the energy of a body due to its motion pls mark me us briansit it means lot to me follow for more answer

Answer: velocity

Explanation:

Answer:

Explanation:

USE UR PERDICIRTON TABLE  

Answer:

I dont a picture

Explanation:

but the answer is 24

Answer:

Similarly, drugs, chemicals, temperature, and light are among the external environmental factors that can determine which genes are turned on and off, thereby influencing the way an organism develops and functions.

Explanation:

Answer:

Yes, I can see the light traveling through the room before it hits the paper.

Explanation:

edmentum

Since light rays travels in a straight line, the light traveling through the dark room can be seen before it hits the paper.

Light rays refers to a straight line path through which light waves travel.

Light rays travel in a straight line and this phenomenon is known as the rectilinear propagation of light.

In a dark room, the path of light rays travelling in a straight can be seen.

Therefore, the light rays traveling through the room can be seen before it hits the paper.

Learn more about light rays at: https://brainly.com/question/478185

#SPJ2

Answer:

They give off their own light energy

Explanation:

I'm taking astronomy and I answered this questions not too long ago

Answer:

Use a fine, crystalline solute and stir vigorously

Explanation:

It is better if it is fine instead of coarse since this will provide more surface area.  If there is more surface area, the crystals will dissolve faster.

You also have to stir the solution vigorously to keep all of the crystals exposed to the solvent.

Answer:

Use a fine, crystalline solute and stir vigorously

Explanation:

Hope this helps

Answer:

C

Explanation:

Hope this helps.

Answer:

The food colouring mixes through the hot water faster than it mixes with the cold water, this is because in hot water the water molecule have more energy and are moving faster than the molecules of cold water .This makes it easier for the food colouring to get mixed quickly through the hot water.

Answer:

.........................................

Explanation:

Answer:

[KBr] = 454.5 m

Explanation:

m is a sort of concentration that indicates the moles of solute which are contianed in 1kg of solvent.

In this case, the moles of solute are 0.25 moles.

Let's determine the mass of solvent in kg.

Density of heavy water, solvent, is 1.1 g/L and our volume is 0.5L.

1.1 g = mass of solvent / 0.5L, according to density.

mass of solvent = 0.5L . 1.1g/L = 0.55 g

We convert the mass to kg → 0.55 g . 1kg /1000g = 5.5×10⁻⁴ kg

m = mol/kg → 0.25 mol /5.5×10⁻⁴ kg = 454.5 m

Answer:

Ag+

Explanation:

If you imagine as if the problem were double replacement, you would pair the Cl with one of the following ions provided in the choices. As seen on Table F, Ag+ paired with Cl- produces an insoluble compound, hence the precipitate. All the other ions shown in the multiple choice section, when paired with Cl- will produce a soluble compound, as a result NOT a precipitate.

Answer and Explanation:

A nonmetal is the answer.

Cause they are dull and brittle, and can be a gas at times at room temperature.

#teamtrees #PAW (Plant And Water)

Answer:

B bonded

Explanation:

Two molecules of hydrogen gas (two hydrogens bonded together) are combined with one molecule of oxygen gas (two oxygen atoms bonded together) in order to form two molecules of water (two hydrogen atoms bonded to one oxygen atom). What are covalent bonds? Covalent bonds occur when two or more atoms share electrons.

In order to form water, two hydrogen atoms and one oxygen atom must be bonded. The correct option is B.

Covalent bonds between two or more atoms occur when they share electrons. with each other.

Two molecules of hydrogen gas are combined with one molecule of oxygen gas which forms two molecules of water. Hydrogen take one electron and oxygen can donate two electrons. One oxygen shares two electron with two hydrogen with one electron gaining capacity.

Thus, in order to form water, two hydrogen atoms and one oxygen atom must be bonded. The correct option is B.

Learn more about covalent bond.

https://brainly.com/question/10777799

#SPJ2