question is in picutree eee eee e e

Answer (TL;DR):

False, ionic compounds form between a metal and a nonmetal. This is because metals are looking to lose electrons to get a full outer shell while nonmetals are looking to gain electrons to get a full outer shell.

Explanation:

Atoms have a full outer shell when their outermost shell holds the maximum number of electrons. For example, if the outermost shell is the first shell of the atom, it can hold up to 2 atoms. When this shell holds 2 atoms, it is considered full. If the outermost shell is the second shell of the atom, it can hold up to 8 atoms. When this shell holds 8 atoms, it is considered full. This can also be referred to as an atom "gaining a complete octet." The reason that atoms want a complete octet is to become stable and less reactive.

Let's say an atom with 3 shells has only 1 electron on the third shell. It doesn't have a complete octet and it wants to gain one. The third shell can hold up to 8 electrons. So, to gain a complete octet, the atom can either gain 7 electrons or just lose the 1 that it already has, which is the easier option. This is the case with metals and the opposite goes for nonmetals.

Because metals want to lose electrons and nonmetals want to gain electrons, they form compounds with each other.

I hope this helps!

Answer:

7.35 - 7.45

Explanation:

The pH scale ranges from 0 (strongly acidic) to 14 (strongly basic or alkaline). A pH of 7.0, in the middle of this scale, is neutral. Blood is normally slightly basic, with a normal pH range of about 7.35 to 7.45. Usually, the body maintains the pH of blood close to 7.40.

Hope this helps

Answer:

The normal pH range if a base is more than 7

Explanation:

Basideally the pH range goes from 0-14 in which

Acidic range is :0-7

Neutral :7

Base : 7 - 14

Answer:

51.9961 grams

Explanation:

You can view more details on each measurement unit: molecular weight of Chromium or grams The molecular formula for Chromium is Cr. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Chromium, or 51.9961 grams.

Answer: 8 moles of Fe

Explanation:

If 2 moles oxide give 4 moles Fe, so 4 moles oxide gives 8

Answer: Molecular formula of copper (II) bromide is [tex]CuBr_2[/tex]

Molecular formula of aluminium (III) nitrate is [tex]Al(NO_3)_3[/tex]

Molecular formula of calcium (II) phosphate is [tex]Ca_3(PO_4)_2[/tex]

Molecular formula of iron (III) sulphide is [tex]Fe_2S_3[/tex]

Molecular formula of mercury (II) chloride is [tex]HgCl_2[/tex]

Molecular formula of magnesium (II) acetate is [tex](CH_3COO)_2Mg[/tex]

Explanation:

The name of the ionic compounds is written by writing the name of the cation first followed by its oxidation state in round brackets and then the name of the anion is written without any suffix. Thus the cation is written first followed by the oxidation state and then the anion.

For formation of a neutral ionic compound, the charges on cation and anion must be balanced.  Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral compound.

Molecular formula of copper (II) bromide is [tex]CuBr_2[/tex]

Molecular formula of aluminium (III) nitrate is [tex]Al(NO_3)_3[/tex]

Molecular formula of calcium (II) phosphate is [tex]Ca_3(PO_4)_2[/tex]

Molecular formula of iron (III) sulphide is [tex]Fe_2S_3[/tex]

Molecular formula of mercury (II) chloride is [tex]HgCl_2[/tex]

Molecular formula of magnesium (II) acetate is [tex](CH_3COO)_2Mg[/tex]

Answer:

MgSO4 + 6H2O ----> MgSO4.6H2O

2C + O2 -----> 2CO

2CuO + C ------> 2Cu + CO2

C2H6 -----> C2H4 + H2

ZnO + C -----> Zn + CO

NiCO3 ------> NiO + CO2

CO2 + 2H2 ------> CH4 +O2

NaOH + HNO3 -----> NaNO3 + H2O

C2H6 --------> C2H4 + H2

Explanation:

Answer:

C. 1, 4–dimethyl–1–cyclohexene

D. 4, 6–dichloro–1–heptene

Explanation:

C. Determination of the name of the compound.

To name the compound given above we must observe the following:

1. Determine the functional group of the compound. In this case, the functional group is the double bond (–C=C–).

2. Determine the parent name by counting the number of carbon that makes up the ring. In this case, 6 carbon makes up the ring. Hence the parent name is cyclohexene.

3. Identify the substituent group attached to the compound. In this case, two methyl group i.e –CH₃ are attached.

4. Locate the position of the substituent group attached by giving the functional group the lowest possible count. In this case, the functional group is at carbon 1, the first methyl group is at carbon 1 and the 2nd methyl group is at carbon 4.

5. Combine the above to obtain the name. Thus, the name of the compound is:

1, 4–dimethyl–1–cyclohexene.

D. Determination of the name of the compound.

To name the compound given above we must observe the following:

1. Determine the functional group of the compound. In this case, the functional group is the double bond (–C=C–).

2. Determine the parent name by counting the number of carbon that makes up the chain. In this case, 7 carbons makes up the chain. Hence, the parent name of the compound is heptene.

3. Identify the substituent group attached to the compound. In this case, two chlorine (Chloro) i.e –Cl are attached.

4. Locate the position of the substituent group attached by giving the functional group the lowest possible count. In this case, the functional group is at carbon 1, the first chlorine is at carbon 4 and the 2nd is at carbon 6.

5. Combine the above to obtain the name. Thus, the name of the compound is:

4, 6–dichloro–1–heptene

Answer:

B.

Explanation:

Not sure if this is correct if not sorry.

Explanation:

a. 6310 m

Two significant numbers means it must have only 2  digits. The first two digits are 6 and 3. The next number 1 is not up to 5 hence it would be round off to zero.

Two s.f = 6300

Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.

6.3 x 10^3

b. 125.00 Kg

Two significant numbers means it must have only 2  digits. The first two digits are 1 and 2. The next number 5 is up to 5 hence it would be round up to one.

Two s.f = 130.00

Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.

Scientific notation = 1.3 x 10^2

c. 6906 km

Two significant numbers means it must have only 2  digits. The first two digits are 6 and 9. The next number 0 is not up to 5 hence it would be round up to zero.

Two s.f = 6900

Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.

Scientific notation = 6.9 x 10^3

d. 0.0828 m

Two significant numbers means it must have only 2  digits. The first two digits(excluding zero) are 8 and 2 . The next number 8 is up to 5 hence it would be round up to one.

Two s.f = 0.083

Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.

Scientific notation = 8.3 x 10^-2

Answer:

A cat jk but for real (It's called Freezing and I feel like explaining it)

Explanation:

Freezing is a process where a liquid changes to a solid by cooling.

If water (liquid state) is cooled, it changes to ice (solid-state). This change is called FREEZING. The temperature at which this occurs is called the freezing point (fp) of the substance.

Answer:

Freezing phase transition

Explanation:

Freezing is a phase transition in which a liquid turns into a solid when its temperature is lowered to its freezing point.Freezing, or solidification, is a phase transition in which a liquid turns into a solid when its temperature is lowered to or below its freezing point. All known liquids, except helium, freeze when the temperature is low enough.

(hope this helps can i plz have brainlist :D hehe)

Answer:

[tex]T=-75.59\°C[/tex]

Explanation:

Hello!

In this case, since we can treat neon as an ideal gas, it is possible for us to use the following equation:

[tex]PV=nRT[/tex]

Whereas the temperature is out unknown, so we proceed as follows:

[tex]T=\frac{PV}{nR}[/tex]

However, we need the moles of neon in 0.02 kg as shown below:

[tex]n=0.02kg*\frac{1000g}{1kg}*\frac{1mol}{20.17g} =0.992mol[/tex]

Thus, we obtain the following temperature in Kelvins:

[tex]T=\frac{6.43atm*2.5L}{0.992mol*0.08206\frac{atm*L}{mol*K}} \\\\T=197.56K[/tex]

Therefore, in degree Celsius it is:

[tex]T=197.56-273.15\\\\T=-75.59\°C[/tex]

Best regards!

Answer:

yes

Explanation:

bc i wanted to know how they taste btw they taste like metal not good 5/10

might try again but not recommended

my favorite one is a quarter probably

Answer: A. absorbs

Explanation:

Answer:

40.95 L

Explanation:

We'll begin by calculating the number of mole in 12.3 g of O₂. This can be obtained as follow:

Mass of O₂ = 12.3 g

Molar mass of O₂ = 16 × 2 = 32 g/mol

Mole of O₂ =?

Mole = mass / Molar mass

Mole of O₂ = 12.3 / 32

Mole of O₂ = 0.384 mole

Next, we shall determine the volume occupied by 0.384 mole of O₂. This can be obtained as follow:

Number of mole (n) of O₂ = 0.384 mole

Pressure (P) = 1 atm

Temperature (T) = 273 K

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

Volume (V) of O₂ =?

PV = nRT

1 × V = 0.384 × 0.0821 × 273

V = 0.384 × 0.0821 × 273

V = 8.6 L

Thus, the volume of O₂ is 8.6 L

Finally, we shall determine the volume of air that contains 8.6 L of O₂. This can be obtained as follow:

Volume of O₂ = 8.6 L

Percentage of O₂ in air = 21%

Volume of air =?

Percentage of O₂ = Vol of O₂ / Vol of air × 100

21% = 8.6 / Vol of air

21 / 100 = 8.6 / Vol of air

Cross multiply

21 × Vol of air = 100 × 8.6

21 × Vol of air = 860

Divide both side by 21

Volume of air = 860 / 21

Volume of air = 40.95 L

Therefore, the volume of air is 40.95 L.

The law of conservation of mass states that, for any isolated system, the mass can neither be created nor be destroyed  

learn more about conservation of mass and energy:

https://brainly.com/question/13971039

Answer:

(C) SO2.

SO2 is known as sulfur dioxide.

The below information about acid rain and SO2’s involvement is from epa.gov:

“Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents. The SO2 and NOX react with water, oxygen and other chemicals to form sulfuric and nitric acids. These then mix with water and other materials before falling to the ground.”

Explanation:

Answer:

A

Explanation:

A formal charge (FC) is the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity(Wikipedia).

The formal charge on an atom in a molecule reflects the electron count associated with the atom compared to the isolated neutral atom(University of Calgary).

Looking at all the structures listed A-E for SeO2F2, only structure A minimizes the formal charges for each atom in SeO2F2.

Answer:

A true universal solvent does not exist. Although water is considered to be a the "universal solvent" it only dissolves other polar molecules. It does not dissolve nonpolar molecules, including organic compounds such as fats and oils. It is only called so because it can dissolve many more than other liquids.

Answer:

a. Each set of elements was arranged in special coloumns based on their mass.

Answer:

3 mole O2

Explanation:

Need balanced equation first:  O2 + 2SO2 --> 2SO3

assuming SO2 is in excess,

1.5 mol O2 (2moles SO3/1mole O2) = 3 mole O2

Answer:  characteristic molar mass of an element is simply the atomic mass in g/mol. However, molar mass can also be calculated by multiplying the atomic mass in amu by the molar mass constant (1 g/mol).

Explanation:

o calculate the molar mass of a compound with multiple atoms, sum all the atomic mass of the constituent atoms. so the answer to your question is B

Answer:

8.55 × 10³ cal

Explanation:

Step 1: Given and required data

Step 2: Calculate the temperature change (ΔT)

ΔT = Final temperature - Initial temperature = 38.8 °C - 22.7 °C = 16.1 °C

Step 3: Calculate the heat required (Q)

We will use the following expression.

Q = c × m × ΔT

Q = 1 cal/g.°C × 531 g × 16.1 °C = 8.55 × 10³ cal

Answer:

26.9 L.

Explanation:

Hello there!

In this case, since the ideal gas equation is able to provide us the volume of neon in 1.2 moles by considering the STP conditions (1.00 atm and 273.15 K) via its mathematical definition:

[tex]PV=nRT[/tex]

We first need to solve for V in the aforementioned equation:

[tex]V=\frac{nRT}{P}[/tex]

So we plug in to obtain:

[tex]V=\frac{1.2mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1.00atm}\\\\V=26.9L[/tex]

Best regards!

Answer:

The missing information or their role in the discovery of the cell is as follows:

Robert Hooke: He was the first scientist to called cells to tiny box-like cavities he saw in cork and illustrated as cells.

A. Leeuwenhoek: he was a microscopist and microbiologist who used microscopes and observed many other living cells. He called animalcules to these single-cell living organisms later used to prove that cells are the fundamental unit of life.

Schwann and Schleiden:  They presented the theory that suggested that the cells are basic building blocks of all living things.

Virchow: He observed that the cell dividing and come from pre-existing cells.

Answer:

Carbon (C)

Explanation:

The electron configuration of Carbon is 2-4.

Answer:

A)  $0.208 per unit

B) $0.220 per unit

C) An inspector should be hired

Explanation:

percentage of defect rate = 2% = 0.02

cost of inspector = $10 per hour

production rate = 48 per hour

cost of not hiring an inspector = $11

A) Determine the inspection cost per unit if an inspector is hired

= cost of inspector / production rate

= 10 / 48 = $0.208 per unit

B) Determine the defective cost per unit if an Inspector is not hired

= cost of not hiring an inspector * percentage of defect rate

= 11 * 0.02

= $0.220 per unit

C)   Inspection cost < defective cost   i.e. $0.208 < $0.220  hence an inspector should be hired

Answer:

dihydrogen monoxide. The 2 is the subscript for H symbolises the presence of 2 Hydrogen atoms.

Explanation:

Answer: If we want to represent two atoms of hydrogen, instead of writing H H, we write H2.

Explanation:

The subscript "2" means that two atoms of the element hydrogen have joined together to form a molecule. A subscript is only used when more than one atom is being represented. ... Some more common molecules and their chemical formula.