CHEMISTRY HIGH SCHOOL

How many particles are present in this diagram?

Answers

Answer 1

Answer: There are 9 particles

Answer 2

Answer:

Answer:

9 duh

Explanation:

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Which element is a solid at STP?A. H2B. I2C. N2D. O2
Bond the following atoms. Determine if they are ionic or covalent, circle your choice. Show the valence electrons and how they are either shared between the atoms or how they are transferred between atoms. Then write the chemical formula in the space provided.Ionic or covalentC ClFormula ____________ Ionic or covalentMg ClFormula _____________
Which term describes this reaction? CH3Br(aq) + OH-(aq) -> CH3OH(aq) + Br-(aq) A. addition B. condensation C. elimination D. substitution

How is an ionic bond formed

Answers

Ionic bonding is the complete transfer of valence electron(s) between atoms

An electron is transferred from one atom to another.

Compared with saturated hydrocarbons, an unsaturated carbon has _____ ratio of hydrogen atoms to carbon atoms.

Answers

carbon has lower ratio of hydrogen atoms to carbon atoms

Which factor is MOST important in determining which minerals will form in a rock?A) The size of the rock.
B) The weight of the rock.
C) The hardness of the rock.
D) The composition of the rock.

Answers

The answer for this question is: The factor that is MOST important in determining which minerals will form in a rock D) The composition of the rock. This is because minerals actually exist as different chemical compounds. By knowing the chemical compounds present in a rock, you can find out what type of mineral is present as well.

Answer:

Its D.

Explanation:

I just took a usatestprep on it and it had the same question.

When K2SO4 is separated into its ions, how is it written?

Answers

Answer: $K^+$ and $SO_4^-^2$

Explanation: Potassium is a first group metal with one valence electron and so it has +1 charge. Sulfate ion is a polyatomic ion with -2 charge. The compound potassium sulfate has two potassium ions and one sulfate ion and the below equation shows how the ions are written when the compound is dissociated into its ions.

$K_2SO_4\rightarrow 2K^++SO_4^-^2$

When K2SO4 is separated into its ions, it is written like this.

K2SO4 -> 2K+ + SO4^-2.

This is a balanced equation.

What fluid flows very slowly?

Answers

Numerical modeling of coupled variably saturated fluid flow and reactive transport with fast and slow chemical reactions

Honey, at room temperature, has a higher viscosity and flows more slowly than water.

A spherical ball of lead has a diameter of 2.5 cm . What is the mass of the sphere if lead has a density of 11.34 g/cm3? (The volume of a sphere is (43)πr3 where r is the radius.)

Answers

Answer : The mass of sphere is 92.727 grams.

Explanation :

To calculate the volume of sphere, we use the formula:

$V=(4)/(3)\pi r^3$ .....(1)

where,

r = radius of sphere

Given :

Diameter of sphere = 2.5 cm

Radius of sphere = $(Diameter)/(2)=(2.5cm)/(2)=1.25cm$

Now put all the given values in the above formula (1), we get:

$V=(4)/(3)* 3.14* (1.25cm)^3$

$V=8.177cm^3$

To calculate mass of a substance, we use the equation:

$Density=(Mass)/(Volume)$ .....(2)

Putting values in above equation (2), we get:

$11.34g/cm^3=(Mass)/(8.177cm^3)$

$Mass=92.727g$

Hence, the mass of sphere is 92.727 grams.

mass = volume x density

volume = πr²
since Diameter = 2.5 cm
then radius = 1.25cm

∴ volume = π x (1.25cm)³
≈ 6.1359 cm³

Thus mass = 6.1359 cm³ x 11.34 g / cm³
= 69.58 g

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