How many grams are present in 2.5 moles of silicon

Answers

Answer 1

Answer:

70.21375

Explanation:

rounded to he nearest tenth place 70.2


Related Questions

please helppp!!
How do ion charges differ
for the fourth main group
column and the transition
metals?

Answers

Answer:

How do ion charges differ for the fourth main group column and the transition metals? Do not have common charges. Transition metals tend to form positive ions, but the number of electrons that are lost varies. Describe how atoms with a large difference in electronegativity form ionic bonds.

Explanation: ?

As stars get older, before they collapse, they throw off dust, heavy atoms and other materials an form a new

A. Constellation
B. Star
C. Rain cloud
D. Nebula

Answers

Answer:

B or D

Explanation:

.....I'm pretty sure I earned on some kids tv show

D I’m pretty sure sorry if it’s not right

when an ecosystem changes the results are (positive negative both or none) explain
This is science!

Answers

Answer:

C. Both

Explanation:

When an Ecosystem changes the effects can be both positive and negative. It all really just depends on what the change is.

What is the name of the ionic compound with the formula:
AlF3

Answers

Answer:

potassium chloride.

For species that reproduce asexually, all their offspring are
A. genetically identical
B. genetically different
C. almost identical
D. slightly different​

Answers

Answer:

A. genetically identical

Explanation:

Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent. A single individual can produce offspring asexually and large numbers of offspring can be produced quickly

All the offspring that are produced in the process are genetically identical.

When we talk about this mode of reproduction, we talk about a mode of reproduction in which an organism reproduces without the fusion of gametes. This occurs essentially by cell division.

When this occur, there is no crossing of genetic material as such, all the offspring that are produced in the process are genetically identical.

Learn more about reproduction:https://brainly.com/question/1301963

Can anyone explain and answer?
Which physical change are both exothermic
A)condensation and evaporation
B)evaporation and melting
C)freezing and condensation
D)melting and freezing

Answers

Answer:

I would say C.)

Explanation:

Freezing and condensation are both ways that heat is let out from an object.

Which of the following elements is used by your body? A) aluminum B) helium C) calcium D) all of the above

Answers

C is the correct answer ( calcium)

Some items, such as rubber, float on the water, while some items, such as gold, sink in
the water. If an item floats is it more or less dense than the water?

Answers

Answer:

If an item is less dense, it floats on the water.

Explanation:

We know this since the more dense something it usually is heavier than if it was less dense. Which ways it down resulting to it sinking.

Iron sulfide is a compound. It is made by heating a mixture of iron and sulfur.
Describe and explain the differences between iron sulfide and a mixture of iron and sulfur.

Answers

Answer:

Here are some of the differences between a mixture of iron and sulfur, and iron sulfide: the mixture can contain more or less iron, but iron sulfide always contains equal amounts of iron and sulfur. the iron and sulfur atoms are not joined together in the mixture, but they are joined together in iron sulfide.

Explanation:

What is the charge for the cation in MnS2

Answers

The answer is +4 for the cation Mn

PLEASE HURRY
Which of the following is a subsurface event that takes place during the rock cycle?

Deposition

Erosion

Weathering

Plate tectonics

Answers

Answer:

Option D, Plate Tectonics

In the rock cycle, surface events takes place at the surface of earth. Thus,

weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.

Explanation:

Answer:

Option D, Plate Tectonics

In the rock cycle, surface events takes place at the surface of earth. Thus,

weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.

Explanation:

Option D, Plate Tectonics

In the rock cycle, surface events takes place at the surface of earth. Thus,

weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.

A 13.9 - g piece of metal ( specific heat capacity is 0.449 /g^ C)who whose temperature is 54.2 degrees * C was added to a sample of water at 13.4 degrees * C in a constant - pressure calorimeter of negligible heat capacity . If the final temperature of the water is 15.6 °C, calculate the mass of the water in the calorimeter .​

Answers

Answer:

26.2g = Mass of water in the calorimeter

Explanation:

The heat absorbed for the water is equal to the heat released for the metal. Based on the equation:

Q = m*C*ΔT

Where Q is heat, m is the mass of the sample, C is specific heat of the material and ΔT is change in temperature

Replacing we can write:

[tex]m_{metal}*C_{metal}*dT_{metal}=m_{water}*C_{water}*dT_{water}[/tex]

13.9g * 0.449J/g°C * (54.2°C-15.6°C) = m(H₂O) * 4.184J/g°C * (15.6°C-13.4°C)

240.9J = m(H₂O) * 9.2J/g

26.2g = Mass of water in the calorimeter

Which of the following interactions would be the weakest?

Picture provided, 10 points. Please only answer correctly.

Answers

Answer:

D.) Li+ and C4H10

i hope it helped.

Mendeleev's proposal of periodic table was based on:

Answers

The proposal of the periodic table was based upon properties that appeared with some regularity by laying out the elements from lightest to heaviest.

[hope this is helpful!:))]

pls do this and don't just do it for the points pls help me I need it

Answers

Answer:

what do you want me to do my friend my best friend who is a dreamer

what do igneous rocks become when they break down and settle into layers?

Answers

Answer:

Sedimentary rocks

Explanation:

Igneous rocks will become sedimentary rocks when they break down and settle into layers .

Igneous rocks are rocks that are formed by the cooling and solidification of magma within or on the earth crust.

When agents of weathering and denudation forces acts on a rock body, they break them down producing sediments in the process.

Sediments are transported into depositional basins where they are laid down and cemented together. This in turn forms sedimentary rocks. The break down and settling of sediments leads to the formation of sedimentary rocks.

A metal can form
A.
a stable nucleus
B.
an anion
C.
a new family
D.
a cation

Answers

i think it might be C

Guys pleasee helpp 20 points

Answers

Answer is B I’m certain

if you had a block square that weighed 5.00 grams what would be the length of each side

Answers

Answer:

[tex]l = 0.793[/tex] cm

Explanation:

Let us assume the density of block square [tex]10[/tex] g/cm³

As we know

Volume = [tex]\frac{Mass}{Density}[/tex]

Thus Volume of this block is equal to [tex]\frac{5}{10} = 0.5[/tex]

As we know volume of square block of side of length "l" is equal to [tex]l^3[/tex]

[tex]l^3 = 0.5[/tex]

[tex]l = 0.793[/tex] cm

What are two sources of phosphorous?
A. stratosphere
B. Erosion
C. Cows
D. Fossil fuels
E. Fertilizer

Answers

Cow and I think erosion

Answer:

A. stratosphere

E. Fertilizer

Explanation:

Trees, birds, and bacteria are all similar because they are all formed from

Answers

Answer:

Cells or atoms

Explanation:

Answer:

are made of one or more cells.

need energy to stay alive.

respond to stimuli in their environment.

grow and reproduce.

maintain a stable internal environment.

Explanation:

Plz brainliest

Calculate the volume, at STP, of a 0.950 g sample of Carbon Monoxide gas, CO.

Answers

Answer:

0.76L is the pressure of CO at STP

Explanation:

To solve this question we must use combined gas law:

PV = nRT

Where P is the pressure of the gas (1atm at STP)

V is volume (Our incognite)

n are moles of the gas (0.950g * (1mol/28g) = 0.034 moles

R is gas constant (0.082atmL/molK)

T is absolute temperature (273.15K at STP)

V = nRT/P

V = 0.034mol*0.082atmL/molK*273.15K / 1atm

V = 0.76L is the pressure of CO at STP


Calculate the mass of 4 moles of CuCl2.

Answers

So the molar mass of CuCl2 is 134.45
You would add the mm of Cu and of 2 chlorine’s to get (bc Cl2).

The molar mass means that per one mile that is how much mass so :
134.45 x 4 = 537.8
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why is it important that the level of the sea water does not go above the level of the filter paper

Answers

Answer:

The water (the substance) that passes through the filter paper is called the filtrate. If your mixture is a solution, such as salty water, then filtering will not separate the salt from the water. Instead, by heating the soluton the solvent (water) evaporates leaving the solid (salt) behind.

Explanation:

Osmium metal, the densest element, has a density of 22.6 g/mL, while hydrogen, the least dense element, has a density of 8.99 e-5 g/mL. Calculate the volume occupied by 1.00 g of each element. How many times more dense is osmium than hydrogen?

Answers

Answer:

1. Volume of osmium = 0.044 mL

2. Volume of Hydrogen = 11123.47 mL

3. Osmium is 251390 times denser than hydrogen

Explanation:

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

Density of osmium = 22.6 g/mL

Density of Hydrogen = 8.99×10¯⁵ g/mL

Mass of osmium = 1 g

Mass of Hydrogen = 1 g

1. Determination of the Volume of osmium.

Density of osmium = 22.6 g/mL

Mass of osmium = 1 g

Volume of osmium =?

Density = mass /volume

22.6 = 1 / volume

Cross multiply

22.6 × volume = 1

Divide both side by 22.6

Volume = 1 / 22.6

Volume of osmium = 0.044 mL

2. Determination of the Volume of Hydrogen.

Density of osmium = 8.99×10¯⁵ g/mL

Mass of osmium = 1 g

Volume of osmium =?

Density = mass /volume

8.99×10¯⁵ = 1 / volume

Cross multiply

8.99×10¯⁵ × volume = 1

Divide both side by 8.99×10¯⁵

Volume = 1 / 8.99×10¯⁵

Volume of Hydrogen = 11123.47 mL

3. Determination of the number of times osmium is denser than hydrogen.

Density of osmium (Dₒ) = 22.6 g/mL

Density of Hydrogen (Dₕ) = 8.99×10¯⁵ g/mL

Dₒ / Dₕ = 22.6 / 8.99×10¯⁵

Dₒ / Dₕ = 251390

Cross multiply

Dₒ = 251390 × Dₕ

Thus, osmium is 251390 times denser than hydrogen.

What is the charge of an electron?

Answers

There is the answer hope this helps

Help me with this pls

Answers

1. the time
2. eye color
3.hight
4. the weather
5. the day of the week

That’s all I could really think of. Hope it helps!

Visible light is a part of what spectrum

Answers

Answer:

Visible Spectrum/Electromagnetic spectrum

Explanation:

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.

Q1; ___________ have almost half a set of electrons in the outer most energy level. 

1- metalloids

2- metals

3- nonmetals

Q2;________ are known to be gasses at room temperature. 

1- nonmetals

2- metalloids

3- metals



Answers

Answer:

2 metalliods....

1 metals

Calculate the pH of the following?
a) 0.12 M NaNO2
b) 0.10 M CH3NH3Cl
c) .45 M NaOCl?

Answers

the correct answer is c
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