Answer:
ok
Explanation:
Answer:
Iron
Explanation:
Using the empirical formula, calculate the formula weight of the compound. Use the periodic table to help you.
Type the correct answer in the box. Round your answer to three decimal places.
Answer:
The formula weight of the compound is
46.069 g/mol.
Explanation:
Determine the molar mass from the empirical formula (C2H6O) by multiplying the molar mass of each element in the compound by the number of atoms of it and adding the resulting masses of the elements:
molar mass of C2H6O = (2 × 12.011 g/mol) + (6 × 1.008 g/mol) + (1 × 15.999 g/mol) = 46.069 g/mol.
In this experiment, you made observations of the ______
and the ____
You used these observations to write the ____
In this experiment, you made observations of the reactant and the product.
You used these observations to write the balanced chemical equation.
What is chemical equation?The symbolic representation of chemical reaction is called chemical equation.The chemical equation should be balanced.
To learn more about chemical equation here.
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Answer:
{first part} reactants, products, balanced chemical equation, classify the reaction
{second part} color change, formation of a gas, formation of a solid
Explanation:
edg 23'
What’s the difference between directly
proportional and inversely proportional.
Answer:
Directly proportional:
A proportion of two variable quantities. when the ratio of two quantities are constant.
inversely proportional:
when one value decreases at the same rate that the other increases.
Explanation:
I hope this does help you, have a great day. :)
Calculate the amount of formula units in 2.10 moles of MgCl₂
Which is the best explanation of why heat is released when
wood burns?
Select one:
A. Burning releases energy stored in chemical bonds.
B. Burning creates energy by increasing particle motion.
C. Burning destroys matter and creates energy from it.
D. Burning causes convection currents which create heat energy.
what word means to bend light rays toward each other
i need help asap :( i’ll give you brainliest
Answer:
a.0.837 moles of silver phosphate
b. 14.55
c. 2.61
Explanation: it is all about the molar ratio so the numbers of front of the molecular formulas there is a 3 in front of the silver nitrate and the other 2 we are asked abuoit have no number so that is a 1 so you are multiplying or dividing by that ratio whichever way you go
How can you measure the volume of an irregular shaped solid?
Answer:
If the object has an irregular shape, the volume can be measured using a displacement can. The displacement can is filled with water above a narrow spout and allowed to drain until the water is level with the tap. As the irregular object is lowered into the displacement can, the water level rises.
Explanation:
About how old is the Sun?
1.2 billion years
4.6 billion years
6.4 billion years
8.2 billion years
Answer:
B : 4.6 billion years
Credits go to the person above me.
;)
Explanation:
EDGE 2021
The sun is about 4.6 billion years old. Therefore, option (B) is correct.
What is the sun made of?The Sun is made primarily of the elements hydrogen and helium. They account for 74.9% and 23.8% mass of the Sun in the photosphere. All heavier elements, called metals account for less than 2% of the mass, with oxygen (<1%), carbon (0.3%), neon (0.2%), and iron (0.2%) being the most abundant.
The hydrogen and helium in the Sun would have been produced by Big Bang nucleosynthesis and the heavier elements were produced by former generations of stars before the Sun was formed.
The amount of helium and its location within the Sun has gradually changed over the past 4.6 billion years. The proportion of helium has raised from about 24% to 60% due to fusion, and some of the He and heavy elements have settled from the photosphere toward the center due to gravity.
Therefore, the age of the sun is about 4.6 billion years.
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Write about similarities and the differences of the plant and animal cell
Answer:
Mark me as brainliest pls
Explanation:
similarities: Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal element
differences: A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. ... Animal cells simply have a cell membrane, but no cell wall.
PLEASE HELP!!!What are the factors of climate change
Answer:
According to The genic variations in atmospheric compositions and proper use of land or the other factors the cahs climate change
The transfer of pollen grains from another of a male to the stigma of female flower
Answer:
pollination is the proces called
Can someone pls help me?
Answer:
17
Explanation:
what is the independent variable
What is the natural reason for the rising surface temperatures of the Pacific Ocean, drought in the western United States, and flooding on the Pacific coast of South America? Is it the Jet Stream, the Gulf Stream, La Niña, or El Niño? This is a science question about weather.
Answer:
El Niño
Explanation:
The natural reason for the rising surface temperatures of the Pacific Ocean, drought in the western United States, and flooding on the Pacific coast of South America Is the El Niño.
El Niño is a climate pattern that happens when there is an unusual warming of the surface temperatures of the Pacific Ocean. This occurs at an interval of two to seven years
During El Niño, the surface waters of the Pacific Ocean become warmer than average and this is as a result of the weakness of trade winds which blows over the entire Pacific Ocean. This makes the atmospheric pressure above the ocean to decrease.
El Niño brings rainfall nd flooding to South America and droughts in the western United States
What is known as the downhill movements of masses of rock and soil?
A. Mass wasting
B. weathering
c. giant erosions
Answer:
b
Explanation:
Answer:
Gravity drives all mass wasting.
Explanation:
Solid iron pellets are heated, melted and drawn into wires. This is an example of a chemical reaction
True
False
Answer:
false
Explanation:
It is a physical reaction because it is being heated.
Answer:
False
Explanation:
Just because the iron was melted into wires does not mean that it isn't iron. It is still iron just in a different form.
What can describe the form of precipitation
Do you have a picture/answer choices?
Some forms of precipitation are rain, sleet, snow, and hail, if that's what you were asking for.
How many moles are in 187 grams of NH3?
11 moles
13.4
moles
3,179 moles
2,618 moles
Answer:
3126 moles
Explanation:
put them all together times them and add
Among the alkaline earth metals in Group 2A/A, which is more reactive - beryllium (element 4) or strontium (element 38)?
Answer:
Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are harder and less reactive than the alkali metals of Group 1A.
Explanation:
hi please help, i will give 100 points
Explanation:
Boiling water:water heats up and bubbles physical change
Baking a cake: starts to cook into bread chemical change
Burning wood: turns into ash and burned wood chemical change
Painting a door: door changes color physical change
Answer:
water is yummy
Explanation:
How does a flux capacitor deteriorate under high octane pressure?
How many molecules are in 0.25 mole of CO?
1.5 x 10 to 23rd power
What are the elements in group 1 of the
periodic table called?
Answer:
there called alkali metals
Answer:
alkali metals.
Explanation:
Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Help please I have 10 min.
Answer:
i cant see the question. i can try to help if you tell me the question.
Explanation:
also how do i use the comments???
What is thought to cause the Earth's magnetic field
Answer:
It is caused by currents of electricity that flow in the molten core.
The moon stays in orbit around the Earth because of the Earth's
Answer:
Gravity
Explanation:
Aluminum has metallic bonds between its atoms. Which statement BEST describes the
valence electrons in aluminum?
are exchanged with nonmetal atoms
are exchanged with other metal atoms
are localized and stay between metal atoms
are delocalized and move between metal atoms
Look at picture
ASAP please will mark as brainlist don’t got much time
Answer:
are delocalized and move between metal atoms
Explanation:
As the problem says, aluminum has metallic bonds. The main characteristic of metallic bonds is that the electrons are free to move between the metal ions (they are delocalized), thus being responsible for the good electrical conductivity of metals.
1. Find the mass of 0.89 mol of CaCl2.
Answer:
97.9
Explanation:
m= n*M
M CaCl2= 40+ 35.5*2= 110
m= 0.89*110= 97.9
The mass of the given mole of [tex]CaCl_2[/tex] is required.
The mass of the given compound is 98.78 g.
Molar mass of [tex]CaCl_2[/tex]
[tex]M=40.078+35.453\times 2=110.984\ \text{g/mol}[/tex]
n = Number of moles = 0.89 mol
Mass is given by
[tex]m=Mn\\\Rightarrow m=110.984\times 0.89\\\Rightarrow m=98.78\ \text{g}[/tex]
The mass of the given compound is 98.78 g.
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what is an example of a combustion reaction
if possible, can it come with an explanation pls
Answer:
An example of a combustion reaction is the burning wood in a fire.
Explanation:
In the combustion reaction, the carbohydrates in wood combine with oxygen to create water and carbon dioxide. This reaction is very energetic, and it generates heat and light as it releases said energy.
Hope this helps! Have a nice day! (And please mark me brainliest)
Boyles Law-
Variables that change:
Variables that remain constant:
Charles Law-
Variables that change:
Variables that remain constant:
Answer:
Boyles Law-
Variables that change: volume and pressure
Variables that remain constant: Temperature
Charles Law-
Variables that change: volume and temperature
Variables that remain constant: pressure
Explanation: