Can someone please help me with this question.

Answer:

D.ll and lll only

Explanation:

that is the best ionic also this i s described the oinic

Answer:

The unbalanced chemical equation is;

C. N₂O₅ + H₂O → HNO₃

Explanation:

In balancing a chemical reaction equation, only the coefficients of the terms of the reactants and/or the products are adjusted (and not the subscripts to the atoms in the compounds) to ensure that the total number of each element is the same on either side of the arrow for the chemical reaction

A coefficient term is the number multiplier of the compounds and elements in a chemical reaction

Therefore, the balanced chemical equation is obtained by changing the coefficient of the product from the implied '1' to a '2' as follows;

N₂O₅ + H₂O → 2HNO₃

Answer:

C. a positive calcium ion and a negative oxygen ion

Explanation:

Ionic bonds are generally positive and negative because one is gaining electrons while the other is losing.

The term chemical bond generally refers to the attractive force that holds the constituent atoms or ions of a molecular species together. Here an ionic bond is formed between a positive calcium ion and a negative oxygen ion. The correct option is C.

An ionic compound is formed by the transfer of one or more electrons between the atoms. An ionic bond or electrovalent bond refers to the strong electrostatic forces of attraction that hold together oppositely charged ions.

The number of electrons lost or gained by an atom of an element so as to acquire a stable octet configuration in its outermost shell is called the electrovalency of the element.

Here 'Ca' has 20 valence electrons and 'O' has 6 valence electrons. So in order to attain the stable octet configuration of 'Ar', 'Ca' loses two electrons whereas 'O' accepts two electrons to attain stable octet configuration of 'Ne'.

Thus the correct option is C.

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Answer:

False

Explanation:

When you continuously feed waves into space, there are going to be some cold spots, or "dead spots."

Answer:

Part A: When air is left in specific environments, it can either expand or contract depending in the given environment, so, if left in a cold car for a few hours, the air inside said balloon will contract.

Part B: If left in said car on a very hot summer day, the air in said balloon will expand, and if left in said car long enough, said balloon will explode due to the air inside expanding

Hope this helped!

Answer:

for what? is there supposed to be a picture?

Explanation:

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Answer:

For example, the atomic radius of the metal zirconium, Zr, (a period-5 transition element) is 155 pm (empirical value) and that of hafnium, Hf, (the corresponding period-6 element) is 159 pm. ... The increase in mass and the unchanged radii lead to a steep increase in density from 6.51 to 13.35 g/cm3.

Explanation:

Answer:

1281.25 Moles of glucose

Explanation:

Multiply 1.25x1025= 1281.25

Answer:

Al2o3 grams to moles

Explanation:

You can view more details on each measurement unit: molecular weight of Al2O3 or grams This compound is also known as Aluminium Oxide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Al2O3, or 101.961276 grams.

Answer:

Q1: Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

Q2: Mass is how much stuff something is made of. Volume is how much space an object takes up.

Answer:

It isn't only for the eating habits but also for building nests, hunting small insects, birds, other creatures including defence. Birds have a narrow small throat so the beak helps ripping off small peices of a big animal l(small bird) and for insects they crush and swallow it, they se their beak for feeding their children by grinding food in their beak and transferring it to the youngsters mouth

Answer:

Natural Cycles

Explanation:

Most sulfur oxides are produced by burning: coal

Air pollution particles may be removed by _____. rain snow wind natural cycles

The three primary sources of air pollution are _____. factories cars electric power plants

The two basic types of air pollutants are _____. gases particulates

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Answer:

Empirical formula: CH2

Molecular formula: C5H10

Answer:

Structural formulas are helpful because they explain the properties and structure of the compound which empirical and molecular formulas cannot always represent.

Explanation:

HOPE ITS HELPFUL FOR U

Answer: .132

Explanation:

Answer:

The number of protons in an atom is called its atomic number. This number is very important because it is unique for atoms of a given element. All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms.

Explanation:

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Answer:

nuclear war ;P

Explanation:

Answer:

Cardiovascular they carry according to me

Answer:

7.129

Explanation:

1.239+2.36.6.7800

Answer:

buffer solution

Explanation:

Answer:

A. Eggs and sperm

Explanation:

Genres are an organisms reproductive cells. Also referred to as sex cells. Females they are ova or egg cells, and males they are sperm.

Answer:

The photosynthesis chemical equation states that the reactants (carbon dioxide, water and sunlight), yield two products, glucose and oxygen gas

Explanation:

Answer:

triangle

Explanation:

dont take me serious

Answer:

2x( 1.008 g/mol) +1 x (15.999 g/mol) = 18.015 g/mol

Explanation:

The mass of 1 mole of water (H2O) is 2x( 1.008 g/mol) +1 x (15.999 g/mol) = 18.015 g/mol

One mole of water is about 18 milliliters.

This is the volume of a few drops of water, 3.65 teaspoons, 1.2 tablespoons, or 0.018 liters. It's not a large volume, yet it contains 6.022 x 1023 water molecules! You can use the same steps to find the mass and volume of any other substance.

18.02 g

So, one mole of water (6.022 x 10 23 molecules) has a mass of 18.02 g. One mol of NaCl (6.02 x1023 formulas) has a mass of 58.44 g.

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i’m pretty sure it all of them!

ALL options above described can impact the wind patterns.

In conclusion, ALL options above described can impact the wind patterns.

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Answer: Since the reaction is 2Ca(NO3)2 = 2CaO + 4NO2 + O2

1) - given the stoichiometric coefficients, we know that 2 moles of Ca(NO3)2 will produce 4 moles of NO2, hence, 1 mole will produce 2 moles of NO2

2) - 328 g produces 22.4 L, since One mole of any gas at S.T.P. occupies the same volume which is 22.4 L.

Hence, 65.6 g produces (65.6*22.4)/328 = 4.48 L

3) - 328 g produces 112 g CaO. Therefore, 65.6 g produces = (65.6*112)/328 = 22.4 g CaO.

4) - Given the stoichiometric coefficients, we know 5 moles of gaseous products are already being produces ( 4+1) by 2 moles of reactant.

5) - 44.8 L at STP = 2 moles of NO2, since One mole of any gas at S.T.P. occupies the same volume which is 22.4 L.

Hence, to produce 2 moles of NO2, we need 1 mole of reactant = 164 g

Hope this helps :)

Explanation:

Answer:

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Explanation:

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Answer:

The mass of O₂ that will be needed to burn 36.1 g B₂H₆ is 125.29 g.