Answer:
4Fe + 3O2 --> 2Fe2O3
Explanation:
scientific notation, fill in the blank.
7.95x10^7 = [ ? ]x 10^6
Answer:
79.5
Explanation:
7.95x10^7 IS 79500000.
If you bring the decimal point left 6 more times it would be 79.500000
How many hydrogen atoms Is needed for C4H8 to become saturated
Answer:
2 atoms
Explanation:
Because it contain one double bond
Calculate the volume, in liters, occupied by 1.80 moles of H2 gas at STP.
Answer:
40.32L
Explanation:
So we know that 22.4 Liters is one mole of a gass so we can set up an equation to test that
1mole 1.8mole
_____ = _____
22.4L x
and then cross multiply so you get 40.32L
Answer:
40.32L
Explanation:
Just did worksheet
Do your answers to the previous questions satisfy
the following statements?
A) The dependent variable is changed by the
independent variable.
B) The independent variable causes a change
to another variable.
C) The independent variable is not changed by
another variable.
Answer:
I put B&C
Explanation:
If something is up higher it will have ________________ potential energy.
the same
more
less
Answer:
More
Explanation:
What is the charge of the nucleus ? Why ?
Answer:
A nucleus is a positive charge
Explanation:
A nucleus is made up of protons and neutrons. Protons have a positive charge and neutrons have a neutral charge.
Explain in a short sentence how you can tell a reaction is a decomposition reaction.
Answer: A decomposition reaction occurs when one reactant breaks down into two or more products.
Mark me as brainilist pls
Carbon Monoxide is a toxic gas that is colorless and tasteless. How many moles of CO are in 1 L of the gas at STP?
28 moles
0.045 moles
22.4 moles
0.224 moles
Answer:
0.045 moles
Explanation:
Given data:
Moles of CO = ?
Volume of gas = 1 L
Temperature and pressure = standard
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
n = PV/RT
n = 1 atm× 1L / 0.0821 atm.L/mol.K × 273 K
n = 1 atm.L / 22.41 atm.L/mol
n = 0.045 mol
Although the order of elements is based on atomic number, vertical families share similar chemical properties.
Question 12 options:
True
False WHAT IS IT
Answer:
It's true
Explanation:
Uhhh, the internet! lol.
Answer:
It's true, ExplanationVVVExplanation: Because the order of elements is based on atomic number, vertical families share similar chemical properties.
why is magneisum a metal
Answer:
Chemical element, metallic, symbol Mg, situated in group IIa in the periodic table, atomic number: 12, atomic weight: 24,312. ... Magnesium is known for a long time as the lighter structural metal in the industry, due to it's low weight and to it's capability of forming mechanically resistant alloys.
Which of the following compounds is least soluble in water?
1) Copper (II) Chloride
2) Aluminum Acetate
3) Iron (III) hydroxide
4) Potassium Sulfate
Answer:
3) iron (iii) hydroxide
Explanation:
At about what temperature does the sample change phase? Justify your
answer based on the cooling curve shown above.
A student states, “When the alcohol sample was at a temperature of 500 K, all the particles were moving faster than any of the particles were moving at
400 K" Do you agree or disagree with this student's statement? Justify your
answer.
What is chemical structure about?
Answer:
chemical structure determines the molecular geometry of ca compound by prtraying the arrangement of atoms and chemical bonds in the molecule..
Explanation:
hope this helps any <3
do pressure and temputer remain consant in earth interior
Answer:
no
Explanation:
Select the correct answer from each drop-down menu.
Researchers stationed at different areas on a mountain and in a tunnel midway through the mountain boiled water at the same time. Even though the water at every station was at the same temperature, the pot at the top of the mountain started boiling before the others. Why?
Water boils when the vapor pressure is
the atmospheric pressure. The atmospheric pressure
at the top of the mountain.
Water boils when the vapour pressure is least the atmospheric pressure.
The atmospheric pressure is equal at the top of the mountain.
What is atmospheric pressure?The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth.
As we go up in altitude the air pressure becomes less. When the pressure decreases, it takes less energy to get the water molecules to escape the surface. So the temperature is less than it would be at sea level.
Air pressure is higher or greater at the bottom of a mountain. This is because the height of the air above that level is thicker than at the top.
Pressure is given by the equation, P=rho*g*h, where rho is the air density, g is the gravity value and h is the thickness of the air layer on top of the level where we are considering the pressure.
Therefore, as we can see, at the bottom of the mountain, the thickness h of air is greater, and so is the pressure.
Hence, water boils when the vapour pressure is least the atmospheric pressure and the atmospheric pressure is equal at the top of the mountain.
Learn more about the atmospheric pressure here:
https://brainly.com/question/11484577
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What is the density of an object with a mass of 125 g and a volume of 150 mL ?
Answer:
13
Explanation:
234567877
PLEASE HURRY
Which layer of Earth is the densest and why is that so?
A: The outer core is densest due to gravitational compression.
B: The outer core is densest due to generation of radiogenic heat.
C: The outer core is densest due to accretion.
C: The inner core is densest due to gravitational compression.
D: The inner core is densest due to generation of radiogenic heat.
Answer:
D
Explanation:
Answer: C: The inner core is densest due to gravitational compression
Explanation:
ANSWER ASAP Which part of the picture shows evidence of matter scattering light waves in
many different directions?
O A. The color of the tree appears black against the sky.
O B. The image of the moon in the sky is incomplete.
OC. The image of the moon on the water's surface is distorted.
OD. The colors on the water's surface match the colors in the sky.
Answer:
The evidence of matter scattering light wave in many different directions is;
D. The colors on the water's surface match the colors in the sky
Explanation:
Light scattering is used to describe the sending of a given beam of light in many directions (by tiny particles) when the light passes through a medium, due to the disruption of the bath of the light ray as it bumps into the tiny particles
Water has the nature of absorbing the red light. The light that enters the water is scattered by the tiny particles in the water such that the blue light which is the spectrum of light water allows to pass through is reflected along with the reflection of the sky and the colors of the water surface match the colors of the sky.
Answer:
C.
Explanation:
I took the quiz
State and explain each law of motion.
Answer:In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction
Explanation:
Answer:
EEEEEeeEEeEEEEEEEeEEEEEEEEEE
Explanation:
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The prefix "semi-" means "partly". Based on your knowledge of the properties of elements, which kind of element is most likely used to make semiconductors?
liquids
metalloids
metals
nonmetals
Answer:
metalloids
Explanation:
The kind of element most likely used to make semiconductors are the metalloids.
These elements have properties between those of metals and non-metals in that they are not truly metals and are partly non-metals.
Under certain conditions they show features of metals or non - metals. The class of these elements are the metalloids. They are used to make semiconductors which are major components of electronics.what element has three valence electrons in the second energy level.
Answer:
Boron
Explanation:
Hope that helps
Answer:
Boron.
Explanation:
2 energy shells
1st energy she'll 2 electrons
2nd energy shell 3 electrons
PLEEEASSEEEE HELPPPPP!!!!!Take some time to research a utility plant. If there is one in your area, you may even visit it.
Otherwise, look up a type of plant that produces energy - such as a nuclear power plant, a
hydroelectric plant, or a coal-burning plant. Find out what energy resources are brought into the
plant. Then find out what energy and what "waste" is produced by the plant. Describe how the
two Laws of Thermodynamics apply to what you find out in your research. Be thorough. You will
be using the information you gather to engage in a debate with your class about
thermodynamics.
Answer:
There are four laws of thermodynamics that define fundamental physical quantities (temperature, energy, and entropy) and that characterize thermodynamic systems at thermal equilibrium.
Explanation:
teachers instructions - “ clear my examples and replace with your own words “ you get brainliest if I get good grade :)
Answer:
can you give me more clearence on what is going on
Explanation:
Help please I need it!
Density can be calculated by dividing an object's mass by its volume. If the mass of an object is 10 grams and its volume is 2 milliliters, what is its density?
Explanation:
mass =10g. volume=2ml. density=mass/volume = 10/2=5kg/m^3Answer:
5 g/mL
Explanation:
So, if the mass is 10 g and the volume is 2 mL, the density equals...
10 g ÷ 2 mL = 5 g/mL
8. __H2 + __O2-> __H2O
9. __K2SO4 + __H2-> __H2SO4 + __K
10. __NO2 + __H2O-> __HNO3 + __NO
Anser:
Explanation:
hope this helps
HELP!!! ASAP!!!! WILL MARK BRAINLIEST!!!!
A certain covalent compound contains sulfur bonded to chlorine. Which of the following statements about this compound is correct?
Question 5 options:
A)
Electrons will reside closer to sulfur, and the bond will be non-polar.
B)
Electrons will reside closer to sulfur, and the bond will be polar.
C)
Electrons will reside closer to chlorine, and the bond will be polar.
D)
Electrons will reside closer to chlorine, and the bond will be non-polar.
Answer:
C) Electrons will reside closer to chlorine, and the bond will be polar
Explanation:
Electrons tend to be closer or attracted to high electronegativity and sulfur has less electronegativity than chlorine. Therefore, electrons will reside closer to chlorine. To find out if it is polar or nonpolar, according to the electronegativity chart you can find online, you can see that the electronegativity of sulfur is 2.5 while the electronegativity of chlorine is 3.0. Because the difference between these two is a slight change, it would be slightly polar. So, the bond will be polar.
Answer:
Electrons will reside closer to chlorine, and the bond will be polar.
Explanation:
The temperature of a city during a week was 35° C, 36°C, 34°C, 38°C, 40°C, 39°C and 44°C. What was the average daily temperature of the town for the week?
Answer:38°
Explanation:
APE X What is happening to particles of matter while a change of state is taking place?
a. They are staying at the same speed
b. They are multiplying in number
c. They are slowing down
d. They are speeding up
Answer:
a. They are staying at the same speed
Explanation:
IF CORRECT PLSPLSPLS GIVE BRAINLIEST WOULD APPRECIATE :)
Answer:
a. They are staying at the same speed
If you discover a new element, how would you know where it should go on the periodic table
Answer:
the atomic number
Explanation:
it would be in the upper corner