what are true about bonds​

Answer:

c

Explanation:

Answer:

119.0023 grams

Explanation:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles KBr, or 119.0023 grams.

The mass of one mole of KBr is 118 grams. Hence, the mass of 9.3 moles of KBr is 1097.4  grams.

Potassium bromide is an ionic compound formed from combination of potassium and bromine atom involving the loss of electron from the potassium metal to the bromine atom.

The atomic mass of potassium (K) = 39 g/mol

atomic mass of Br = 79 g/mol

Hence, the molar mass of KBr = 79 + 39 = 118 g/mol

Therefore , the mass of one mole of KBr is 118.

The mass in grams of 9.3 moles of potassium bromide is thus, 9.3 times the mass of one mole of KBr. Thus,

mass of 9.3 moles = 9.3 × 118 = 1097.4 g.

Therefore, the mass in grams of 9.3 moles of KBr is 1097.4 g.

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Answer: B

Explanation: Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of atoms) gains or loses electrons. (A cation is a positively charged ion; an anion is a negatively charged ion.)

Answer:

The nucleus of an atom is made up of a dense ball

of protons and neutrons surrounded by electrons.

Explanation:

We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.

Symbol of proton= P⁺  

Symbol of neutron= n⁰  

The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The umber of protons and electrons are always equal to make the atom electrically neutral and when an atom loses its valance electron the number of protons increases and thus positive charge increased and atom form cation.

:It's important for scientists to know the properties of matter because all things are made up of matter. Each type of matter has different physical characteristics and scientists need to know and understand these characteristics to make calculations.

Explanation:

Answer:

its not

Explanation:

bc its dumb.. thx for the points

Answer:

2

Explanation:

Answer:

The brain

Explanation:

Answer:

Option C

Explanation:

Because of how low the air density is, most consider it as entering outer space when you enter into the "Thermosphere" or option C. The Thermosphere is approximately 800 kilometres in the sky right above the Mesosphere and the Stratosphere which most fighter jets maximum height is.

Hope this helps.

Answer:

Laurasia and Gondwanaland

Explanation:

Answer:

D

Explanation:

Answer:

B false

Explanation:

Answer:

D is the right answer cell wall and chloroplasts

Answer:D

Explanation: Because you know what each cell looks like

Its A CUHH!!!!!!

WHY???- BC I SAID SO CUHH

Answer:

B.) Atomic Properties

can I have brainliest?

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The climate of New York is continental, with cold winters and hot summers. The daily average temperature ranges from 0.5 °C (33 °F) in January to 24.5 °C (76 °F) in July.

(hope this helps ^^)

The presence of which Fe²⁺ ion usually produces a colored solution. Therefore, option C is correct.

An ion can be described as a chemical specie that exhibited a positive or negative charge. The term ‘ion’ can be referred to atoms or molecules with non-zero charges on them. Therefore, all atoms have more electrons than protons or more protons than electrons.

If the number of protons in atomic structure is greater than electrons are termed to hold a net positive charge and are referred to as cations. The ions that contain a greater number of electrons than protons in atomic structure hold a net negative charge are anions.

The electronic configuration of the iron is [Ar]3d⁶4s². As the iron atom losses 2 electrons in its valence shell, it becomes a cation  Fe²⁺ ion. As it has four unpaired electrons produces a colored solution.

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Answer:

A new substance was forming

Explanation:

Two types of changes are undergone by substances involved in a reaction. They are physical changes and chemical changes. Physical changes are those changes that does not involve the synthesis of a new product. On the other hand, CHEMICAL CHANGES alters the chemical composition of the substances involved, and hence, new substances are formed.

Chemical changes are usually characterized by change of temperature, color change, evolution of a gas etc. According to this question, Mia mixed two substances in a test tube and noticed that the test tube became warm. She also noticed gas coming from the test tube. Based on Mia's observations, a CHEMICAL CHANGE, LEADING TO THE FORMATION OF NEW SUBSTANCE, HAS OCCURRED.

Answer:

deez nuets

Explanation:

bf gm Jr rj if dl if did fll j fll kd golf du is no u to

Answer: A subscript or superscript is a character that is set slightly below or above the normal line of type, respectively. It is usually smaller than the rest of the text. Subscripts appear at or below the baseline, while superscripts are above.

a coefficient is a constant term related to the properties of a product. In the equation that measures friction, for example, the number that always stays the same is the coefficient.

Parentheses are used in mathematical expressions to denote modifications to normal order of operations (precedence rules). In an expression like , the part of the expression within the parentheses, , is evaluated first, and then this result is used in the rest of the expression.

Chemical symbols are abbreviations used in chemistry for chemical elements, functional groups and chemical compounds. Element symbols for chemical elements normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalized.

That there are no numbers present in the chemical formula means that there is one atom of each element present in the molecule. The Periodic Table reveals that Na is the symbol for sodium, and Cl is the symbol for chlorine.

Explanation:

Is this Good enough?

Answer:

1. A subscript or superscript is a character that is set slightly below or above the normal line of type, respectively. It is usually smaller than the rest of the text. Subscripts appear at or below the baseline, while superscripts are above.

2. In mathematics, a coefficient is a multiplicative factor in some term of a polynomial, a series, or any expression; it is usually a number, but may be any expression. In the latter case, the variables appearing in the coefficients are often called parameters and must be clearly distinguished from the other variables.

3. In rhetoric, a parenthesis or parenthetical phrase is an explanatory or qualifying word, clause, or sentence inserted into a passage. The parenthesis could be left out and still form grammatically correct text. Parentheses are usually marked off by round or square brackets, dashes, or commas.

4. Chemical symbols are abbreviations used in chemistry for chemical elements, functional groups and chemical compounds. Element symbols for chemical elements normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalised

5. The numero sign or numero symbol, №, is a typographic abbreviation of the word number indicating ordinal numeration, especially in names and titles. For example, using the numero sign, the written long-form of the address "Number 22 Acacia Avenue" is shortened to "№ 22 Acacia Avenue", yet both forms are spoken long

Explanation:

BTW i copied and pasted from the internet, i did not have time to write it all down cause im on an edge quiz, sorry.

Answer:

ask a question

Explanation:

You have to ask a question or solve a problem before you can develop a prediction/hypothesis, conduct an experiment or even make a conclusion. The question comes first.

Answer:

1.78 atm

Explanation:

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

Mass of Cl = 355 g

Molecular weight of Cl = 70.9 g/mol

Volume (V) = 70.0 L

Temperature (T) = 30 °C

Pressure (P) =?

Next, we shall determine the number of mole in 355 g of chlorine (Cl). This can be obtained as follow:

Mass of Cl = 355 g

Molecular weight of Cl = 70.9 g/mol

Mole of Cl =.?

Mole = mass /molecular weight

Mole of Cl = 355 /70.9

Mole of Cl = 5 moles

Next, we shall convert 30 °C to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Temperature (T) = 30 °C

Temperature (T) = 30 °C + 273 = 303 K

Finally, we shall determine the pressure of the gas as illustrated below:

Volume (V) = 70.0 L

Number of mole (n) = 5 moles

Temperature (T) = 303 K

Gas constant (R) = 0.0821 atm.L/Kmol

Pressure (P) =?

PV = nRT

P × 70 = 5 × 0.0821 × 303

P × 70 = 124.3815

Divide both side by 70

P = 124.3815 / 70

P = 1.78 atm

Therefore, the pressure of the gas is 1.78 atm

The pressure of the gas in atmospheres if it's temperature is 30.0 degrees celcius is 1.77 atm.

Pressure of the given gas will be calculated by using the ideal gas equation as:

PV = nRT, where

P = pressure of chlorine gas = ?

V = volume of chlorine gas = 70 L

R = universal gas constant = 0.082 L.atm / K.mol

T = temperature chlorine = 30 degree celsius = 303 K

n is the moles of gas which can be calculated as:

n = W/M, where

W = given mass of chlorine gas = 355g

M = molar mass of chlorine gas = 70.9g/mol

n = 355/70.9 = 5 moles

On putting all these values on the above equation and calculate for P, we get

P = (5)(0.082)(303) / 70

P = 1.77 atm

Hence required pressure is 1.77 atm.

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Answer:

The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

Explanation:

hope that helps

Answer:

should be made illeagl everywhere

Explanation:

i took the test

Abraham Lincoln believed that American democracy meant equal rights and equality of opportunity. According to him, slavery is wrong both morally and politically. He said that slavery should be made illegal everywhere. The correct option is B.

The 13th Amendment to the U.S constitution ratified in 1865 in the aftermath of the civil war, abolished slavery in the united states. The 13th Amendment states that ''Neither slavery nor involuntary servitude, except as a punishment for crime shall exist within the united states.

The term slavery indicates the ownership of a person as property, especially in regards to their labor. A slave is a person who is owned by another person or is forced to work against their own will.

Lincoln's position on slavery in the united states is one of the most discussed aspects of his life. Lincoln frequently expressed his moral opposition to slavery in public and private.

Thus the correct option is B.

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Answer:15.9994 g/mol

Explanation:

Answer:

B

............. M

Explanation:

Emergence

Answer:

See the answer below

Explanation:

Beryllium forms an ion with 2 electrons in its outermost shell. Hence the charge on the element is 2+, that is,  Be2+. In order for Be to form a stable bond with another element, such an element must have a deficit of electrons  in its outermost shell. Beryllium will have to donate its 2 electrons to this element for its self-stability.

Answer:

The correct answer is 10 core electrons and one valence electron.

Explanation:

The electrons in an atom, which are not valence and do not take part in chemical bonding are known as core electrons. The core electrons and the nucleus of an atom produces the atomic core. These core electrons are held tightly with the nucleus. On the other hand, the outer shell electrons, which are associated with an atom and take part in the generation of a chemical bond is the outer shell is open are known as valence electrons.

In the given question, the atomic number of an element is 11, thus, the electronic configuration will be,

1S² 2S² 2P⁶ 3S¹

Hence, there is only one valence electron and 10 core electrons.

Answer:

a stress hormone is epinephrine

Answer:

Magnesium, strontium, and barium belong to group 2A of the periodic table.

Answer:

html

Explanation:

im in web tech