Which statement describes a chemical property of gasoline?
O A. It melts at -57°C.
O B. It is highly flammable.
O C. It is a clear liquid.
O D. It has a density of 0.7 g/cm3.
1.Write the chemical formula for the ionic compound formed by each pair of ions.
a.Na+and Br−
b.Mg2+and Br−
c.Mg2+and S2−
d.K+and Cl−
e.Mg2+and Cl−
f.Li+and N3−
2. Noel created two binary ionic compounds using sameCation and two different anions -MgO and MgCl2Now ,Can you create two binary ionic compounds withTwo different cations and same anion
PLEASE HELP FAST !!
Answer: a
Explanation:
One atom of carbon _____.
has four electron shells
is part of all inorganic compounds
forms a special shape called a tetrahedron
can bond with up to four other atoms
Answer:
One atom of carbon:
does not has four electron shells
cannot form a special shape called a tetrahedron
is not part of all inorganic compounds
so only right ans left: can bond with up to four other atoms
What two gases in the atmosphere do animals and plants need to breathe and grow?
Answer: Plants and animals make the gases that the other needs to live. Plants need carbon dioxide and animals exhale carbon dioxide as a waste product. People and other animals need oxygen and plants produce oxygen during photosynthesis.
Pls help this is due in 5 mins!!!! Brainlest to the best answer and 20 points
Every Cell in the body requires oxygen for respiration so that sufficient energy can be produced. Carbon dioxide, a waste product, is also produced and needs to be removed.
Therefore, the levels of both gases must be regulated. How does this explain the changes in our pulse rates
Answer:
Your pulse will go higher or lower, This explains the changes in our pulse rate because, our heart is having to work twice as hard. Our heart is having to work twice as hard because while its producing oxygen its also getting rid of the Carbon Dioxide. while you are jogging or doing any physical activity than your body requires alot of energy and produce a lot of carbon dioxide which causes the heart to beat fast as to remove co2 and take o2 from the blood leading to higher rate of pulse. on the secon hand if you are sedentary , consumption and production of o2 and co2 respectively will decrease leading to the slow beating of heart leading to low pulse
Explanation:
Why is rain likely when warm, moisture-laden air meets cold air? A) The lighter warm air will rise and cool down, causing condensation and rain. B) The cold air moves faster and pushes the warm air away, causing condensation and rain. Eliminate C) The moisture in the warm air condenses on contact with the cold air, causing rain to fall. D) The cold air mixes with the warm air, reducing its temperature causing moisture to condense.
Answer:
B) The cold air moves faster and pushes the warm air away, causing condensation and rain.
You know the drill by now-
Answer:
distance time
Explanation:
Answer:
First box : Distance
Second Box: Time
Explanation:
<3
I have 7 more questions left :’)
How do you think the presence of farms will affect the oxygen concentration in the ponds? im in sixth grade so i can't really comprehend to much of words lik algae or my teacher will ask me how i got educated on the topic
Answer:
The more farms the less the oxygen concentration levels. Farmers use fertilizers to increase crop growth. When algae die, bacteria break down their remains, using up the dissolved oxygen in the water. The rapid loss of oxygen, or eutrophication, can kill fish and other wildlife living in the pond or stream.
Explanation:
Answer:
The more farms the less the oxygen concentration levels. Farmers use fertilizers to increase crop growth. When algae die, bacteria break down their remains, using up the dissolved oxygen in the water. The rapid loss of oxygen, or eutrophication, can kill fish and other wildlife living in the pond or stream.
Which of the following statements best defines the Law of Conservation of Mass?
Mass cannot be created but it can be destroyed under extreme presures
Mass cannot be conserved during a chemcial reaction: a little bit of mass is always lost
The mass cannot be created nor destroyed
Mass can be created and destroyed
Answer: mass cannot be created or destroyed.
Explanation:
Energy cannot be created or destroyed and mass is an energy!
Choose all the answers that apply.
Which of the following are physical properties?
flammability
hardness
magnetism
boiling point
density
How does the diaphragm aide in breathing?
A. When the diaphragm contracts, the lungs expand and allow
oxygen to enter
B. When the diaphragm relaxes, the lungs expand and allow
oxygen to enter
C. The diaphragm does not work with the respiratory system
Frank has an eraser It has a mass of 4g and a volume of 2ml What is its density hint Density equals mass and volume
Answer:
its 16ml
Explanation:
Answer:
it is 16ml
Explanation: I just want to help and get points♀️
It's the drawing axis, this is due in some hours so pls hurry.
Answer:
What are we supposed to do
Explanation:
Answer:
Ummm... wdym... comment
↓
Explanation:
The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?
a.
3
c.
6
b.
5
d.
7
What two objects transmit light?
Answer:
Water, and metal.
Explanation:
1. Explain what the process of respiration is.
2. List at least 6 of the organs or structures which exist in the
respiratory system.
3. When we exercise, why do we breathe harder?
Answer:
The process of respiration is breathing
Explanation:
Which of the following descriptions matches the motion shown in the graph.
A person leaves home and slows down for a pedestrian.
A person leaves home, picks up speed, and then stops at a red light.
A person is parked at parking lot and then speeds off.
A person walks down the block at a steady speed.
If I already asked this but please help ;v;
Answer:
A person leaves home, picks up speed, and then stops at a red light.
Explanation:
What happens to the wave on the string when you decrease the amplitude?
Answer:
The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases. ... The amplitude of a wave is related to the amount of energy it carries. A high amplitude wave carries a large amount of energy; a low amplitude wave carries a small amount of energy.
Explanation:
have an amazing day luv
Answer:
The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases
Explanation:
Is this right?
...........
I will brainly
And 5 star rate
I will brainly
And 5 star rate
Answer:
agree
Explanation:
you cannot undo the reaction when you bake the cake
Which answer one
(A Carbon dioxide Carbon dioxide enters their leaves from the atmosphere.)
( B Carbon dioxide enters their leaves from the atmosphere.)
(C Carbon dioxide enters their roots from the soil.)
(D Carbon dioxide is produced in a chemical reaction inside their mitochondria.)
Answer:
B) Carbon dioxide enters their leaves from the atmosphere.
Explanation:
Answer: I think the answer is A
Explanation:
The movement of rocks and soil is an example of
erosion
weathering
deposition
2.
How does alternate freezing and thawing of water cause weathering to occur?
Freezing chemically alters the rock surfaces
Water expands when it freezes and cracks rocks open
Thawing causes rock particles to move from place to place
3.
How can you determine if a mountain valley has been created by a glacier?
It is V-shaped
It is U-shaped
It is irregularly shaped
Answer:
1. C (deposition)
2. C (Thawing Causes rock particles to move from place to place)
3. Glaciers were moving along, right? so it has to be U shaped since it was a big hunk of ice moving around lol ( my backyard was formed by a glacier so)
brainliest ? :')
Answer:
n
2.
How does alternate freezing and thawing of water cause weathering to occur?
Freezing chemically alters the rock surfaces
Water expands when it freezes and cracks rocks open
Thawing causes rock particles to move from place to place
3.
How can you determine if a mountain valley has been created by a glacier?
It is V-shaped
It is U-shaped
It is irregularly shaped
Explanation:
It is U-shaped
Jessica is traveling from Miami, Florida, to Chicago, Illinois. Using the map, tell what the land will be like during the first half of her trip.
The elevation will be high.
The elevation will be low.
The land will be mountainous.
The land will stay below sea level.
Charlie is doing a scientific investigation about the properties of light energy. For his experiment, he points a flashlight at a mirror and then at a basketball. Which of the following best describes what Charlie would observe?
A The light traveled through both objects and refracted which made them appear bigger.
B The light was completely absorbed by both objects, and he could see white and blue.
C When the flashlight was pointed at the mirror, the light reflected in the same direction. When the flashlight was pointed at the basketball, the light was reflected in different directions.
D When the flashlight was pointed at the mirror, the light was absorbed. When the flashlight was pointed at the basketball, the light was refracted in a different direction.
Answer:
its not a its c
i think
Explanation:
When the flash light is pointed to a mirror it absorb some of the light and when it is pointed to the basket ball the light will refract in a different direction.
What is refraction?Refraction is an optical phenomenon in which the light changes is direction or bends when going from one medium to the other.
Mirror is transparent and will absorb and reflect light. Whereas, basket ball is opaque and never shows any reflection or absorption of light. Thus light when travel from air to the solid and then to air it bends in its direction.
Therefore, option D, that is the flashlight is absorbed by the mirror and refracted by basket ball in different direction is correct.
To learn more about refraction, refer the link below:
https://brainly.com/question/2660868
#SPJ2
What is the difference between force and velocity?
Answer:
A force pushes or pulls on an object, but velocity is simply something an object has
Explanation:
What is radiation?????????????
Answer:
Radiation is the emission of energy through space in the form of particles and/or waves. Nuclear reactions are very different from chemical reactions. In chemical reactions, atoms become more stable by participating in a transfer of electrons or by sharing electrons with other atoms.
Radiation is said to be the transfer of heat between two objects without any medium between them , that can help them in heat transfer . Hence radiation is said to be the direct transfer of heat between two objects . For example the heat we get from the sun can be said to be from radiation as there is nothing between us and the sun that is helping the sun's heat reach us . The sun's heat reaches Earth directly . This is an example of radiation; which is a type of heat transfer .
I will brainly
And 5 star rate
Asapp
Answer:
Agree
Hope this helps
Which of the following represents two molecules of carbon dioxide?
C 2O 2
CO 2
2C 2O 2
2CO 2
Answer:
CO 2 is the correct answer.
Explanation:
Answer:
Co2
Explanation: