What charge would you expect for an formed by Ca?
O +1
O-1
+2

Look at picture
ASAP please will mark as brainlist don’t got much time

Answer:

molar mass sodium chromate = 162g

12.6g ÷ 162g/mole = moles sodium chromate (This is the solute)

molalrity or M = moles solute ÷ lliters of solution (You'll have to change given mL to L)

Answer:

+4

Explanation:

An atom is considered to be neutral before losing or gaining any electrons. They are neutral in charge because they initially have the same number of protons (with charge of +1 each) and electrons (with a charge of -1 each).

Consider charge in an electron like a balance, with positively charged protons on one side and negatively charged electrons on the other. When you have the same number of each, there is equal amounts of positive and negative charge so the atom is neutral with a charge of zero.

For example, potassium has 19 protons, and 19 electrons. This means it has

19 positive charges and 19 negative charges. If you take away one electron, it now has 19 positive charges and 18 negative charges. So there is one more positive charge than negative, which means it is now an ion (a charged atom) with a charge of +1. If you take away two electrons the charge becomes +2... 4 electrons the charge becomes +4.

Answer:

hydrogen

Explanation:

i took chemistry last year a d passed

The density of a sample is the ratio of its mass to volume. Thus it is determined by dividing its mass by the volume of the sample.  Hence, option b is correct.

Density of a sample is the measure of its mass per unit volume. It describes how much denser the substance is in a particular volume of the substance. Mathematically it is the ratio of its mass to the volume.

The ratio of density of a substance to the density of water is called its specific gravity. If specific gravity is greater than one then it will sink on water whereas, if it is less than one the substance will float on water.

The density of a substance depends on the mass, volume, bond type, temperature and pressure. Thus, density of a substance vary with difference in temperature or pressure. Density can be expressed in units such as g/ml, g/cm³.

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Answer:

C

Explanation:

When the electron is greater than proton the atom will be negatively charged.

So, 2-5= -3

Hope this helped you!

Answer:

Explanation: Water is Hydrogen and 2 oxygen 2 being the 2 oxygen molecules then the other molecules like cool-aid or Magnesium

Examples

C6H12O6 + H2O

NaCI + H2O

Hope this helps!

Answer:

1.mass of Ag3PO4=4185.8g

2.mass of AgBr=6732g

Answer:

This is so cause ...

Igneous rocks are formed when the  molten material cools and hardens

and

Metamorphic rocks  form when they are subjected to high temperatures and the great pressure of the rock layers above it.

So most of these rocks are found beneath the earth''s crust

(I hope im right... this might not be the perfect answer... but this as close as I can get.. I hope it usefull  for u )

The given statement is  true because igneous and metamorphic rocks are formed through processes that typically occur deep within the Earth's crust or mantle.

Igneous rocks are formed from molten magma that cools and solidifies beneath the Earth's surface, while metamorphic rocks are formed from existing rocks that are subjected to intense heat and pressure deep within the Earth.

After their formation, these rocks may remain buried beneath the Earth's surface due to ongoing geological processes such as plate tectonics, where rocks are pushed deeper into the Earth's mantle over time.

Additionally, erosion and weathering can expose rocks at the Earth's surface, but the majority of the exposed rocks tend to be sedimentary rocks rather than igneous or metamorphic rocks.

As a result, the vast majority of igneous and metamorphic rocks remain buried deep within the Earth's crust and mantle, making up the majority of the Earth's crust beneath the surface.

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Scientists learn learn about the world through observation which helps in making scientific theories.

Observations are defined as a set of statements or facts which are recorded while conducting an experiment.Observations are made through sensing changes in the variables of the experiment.

It is specifically defined as an act of knowing or recording the changes in the variables of the experiment.Recording observations holds importance as recording observations avoid the experiment to be repeated over and over again.

It is important to note down observations so that the testing of hypothesis is made easier.There are four types of observations .Observations need to be descriptive and must be written in complete sentences and should include all the numerical data of the experiment.

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Answer:

Aphotic zone

Explanation:

Answer:

40g/mol

Explanation:

Na + O + H

23 + 16 + 1

= 40g/mol

Answer:

O, C,  Sn, Sr

Explanation:

As per the periodic table trends, atomic radius of an atom deceases from left to right and increases down a group this is so because across a period or from left to right, number of protons increases that increases the nuclear charge and nuclear radius decreases. Down the group, atomic radius increases because energy level increases and distance between nucleus and outermost orbital increases.

The elements in order from smallest to largest atomic radius are:

O, C,  Sn, Sr because as per the periodic table trends, oxygen (O) fall into right side of Carbon (C) in the periodic table and Strontium (Sn) and Tin (Sn) fall into down the group where Tin (Sn)  is on the right side of Strontium (Sn).

Hence, the correct order is "O, C,  Sn, Sr".

Answer:

Didn't know the answer, sorry.

Answer:

30.62 L

Explanation:

From the question given above, the following data were obtained:

Initial volume (V₁) = 55 L

Initial pressure (P₁) = 3.2 atm

Initial temperature (T₁) = 520 K

Final temperature (T₂) = 760 K

Final pressure (P₂) = 8.4 atm

Final volume (V₂) =?

The final volume of the gas can be obtained as follow:

P₁V₁ / T₁ = P₂V₂ / T₂

3.2 × 55 / 520 = 8.4 × V₂ / 760

176 / 520 = 8.4 × V₂ / 760

Cross multiply

520 × 8.4 × V₂ = 176 × 760

4368 × V₂ = 133760

Divide both side by 4368

V₂ = 133760 / 4368

V₂ = 30.62 L

Therefore, the new volume of the gas is 30.62 L

Answer:

0.59

Explanation:

Is 0.59 because you are dividing 35.0g by 58.5 which will than give you 0.59

Answer:

Carbon tetrachloride is non-polar and so the only kind of force that can exist is induced dipole.

Answer:

A. Atomic Number

Explanation:

The mass number is used to calculate the number of neutrons & electrons in one atom of an element. In order to calculate the number of neutrons you must subtract the atomic number from the atomic mass.

Answer:

i love dino nuggies!!!

Explanation:

there fun

Answer:

shut ur goofy as up

Explanation:

B

Explanation:

Burning is a chemical change and cutting grass is a physical change

Chemical change, Physical change. Hence, option B is correct.

A physical property is not related to a change in its chemical composition

A chemical change occurs when one chemical substance is changed into one or more different substances, such as when iron becomes rust.

A physical change occurs when there is change in structure but not in its composition.

Hence, Burning is a chemical change and cutting grass is a physical change.

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Answer:

81.3 a

Explanation:

Just search up answers on wolframalpha.com

Answer:

is this have picture so I can solve

Answer:

ribosome

Explanation:

he ribosome is a cell or vertebrate structure that makes proteins. Proteins are required to direct the functions or functions of many cells, such as repair or chemical processes. The ribosome can be found floating within the cytoplasm or attached to the endoplasmic reticulum.

Explanation:

Let the mass of the compound be 100g.

Mass of Sulfur = 96g.

=> Moles of Sulfur

= 96g / (32.07g/mol) ≈ 3

Mass of Hydrogen = 4g.

=> Moles of Hydrogen

= 4g / (1.008g/mol) ≈ 4

Mole ratio of Sulfur to Hydrogen = 3 : 4,

Empirical formula of compound = S3H4.

Empirical formula is the simplest whole number ration of elements in a compound. Molecular formula is n times where n is integers 1,2,... Therefore, S[tex]_3[/tex]H[tex]_4[/tex] is the empirical formula of a hypothetical compound that is 96%S and 4% H.

Empirical formula gives the proportion of the element that is present in a compound. It does not give information about the actual number or the arrangements of the atoms.

mass of the compound be 100g.

Mass of Sulfur = 96g.

number of  Moles of Sulfur= 96g / (32.07g/mol) ≈ 3

Mass of Hydrogen = 4g.

number of Moles of Hydrogen= 4g / (1.008g/mol) ≈ 4

Mole ratio of Sulfur to Hydrogen is 3 : 4

Empirical formula of compound is S[tex]_3[/tex]H[tex]_4[/tex].

Therefore, S[tex]_3[/tex]H[tex]_4[/tex] is the empirical formula of a hypothetical compound that is 96%S and 4% H.

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Answer:

Strongest intermolecular force

Hydrogen Bonding (H-Bonding)

Hydrogen bonds are caused by highly electronegative atoms. They only occur between hydrogen and oxygen, fluorine or nitrogen, and are the strongest intermolecular force.

Hydrogen bonds have the largest dissociation energy.

Hydrogen bond is formed when hydrogen is attached to some electronegative elements like O, N and F.

The dissociation energy is the energy required to break a bond and form two atomic or molecular fragments, each with one electron of the shared pair.

Hydrogen bonds are caused by highly electronegative atoms. They only occur between hydrogen and oxygen, fluorine or nitrogen and are the strongest intermolecular force.

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Answer:

ionic bonding

Explanation:

In ionic bonding, electrons are completely transferred from one atom to another.

Answer:Ionic bond

Explanation:

Ionic bond involves a complete transfer of electron. For eg. in NaCl, Na gives one of its electron to Cl.

true

We describe the luminescence spectral properties of CdS nanoparticles with multiphoton excitation. Three types of CdS nanoparticles were examined which were a CdS/dendrimer composite which displays high anisotropy, Cd2+-enriched nanoparticles which display two emission maxima, and polyphosphate-stabilized nanoparticles which display long wavelength emission. Illumination with long wavelengths near 700−790 nm resulted in two-photon excitation. Essentially the same emission spectra and intensity decays were observed with one-photon and two-photon excitation. Comparison with fluorescein indicates the NPs display large two-photon cross sections near 100 GM. The CdS/dendrimer and Cd2+-enriched CdS nanoparticles displayed large anisotropy values with two-photon excitation, substantially larger than with one-photon excitation. It appears that semiconductor nanoparticles are comparable to organic fluorophores which display the same spectral properties with one-photon and two-photon excitation.