asap! first to answer correctly gets 10 pts plus brainliest! :)
Answer:
c
Explanation:
c first quarter waxing half moon
A topographic map with 4 regions labeled. Region 1 is an area with no contour lines near the railroad. Region 2 is an area with few contour lines. Region 3 is an area with several contour lines close together with index contour line labeled 450. Region 4 is an area with few contour lines.
Which area is the flattest?
1
2
3
4
Answer:
Region one because an area that has contour lines close together means that the area is steep. but in region ones case it has no contour lines meaning the area is flat.
Answer:
A. 1
Explanation:
Which one of these is NOT a sign of chemical change? *
Fire
Bubbles
Liquid
Light
Heat
Cold
what ionic are compounds used in our daily life?
Answer:
Explanation:
NaCl sodium Chloride as ordinary salt
Naf sodium fluoride is used in toothpaste which we use every day
Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes the reaction
Answer:
The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products.
Explanation:
The mass of the reactants and products are equal and are not dependent on the physical state of the substances.
Law of conservation of mass and and law of conservation of energy describes this reaction very well.
What is law of conservation of mass?Law of conservation of mass states that that mass is neither created nor destroyed and remains constant over time.What is law of conservation of energy?Law of conservation of energy states that that energy is neither created nor destroyed , it only changes from one form to another form.How it is related with photo synthesis?In photosynthesis reaction plants uses sunlight as energy to convert carbon dioxide and water into glucose and oxygen.In this reaction total number of carbons , hydrogens and oxygens used remains constant.Thus, Law of conservation of mass and and law of conservation of energy describes this reaction very well.
Learn more about photosynthesis here
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Answer only if you
had/have braces how long did it take to notice change with your braces on
Answer:
about 2 years I think, you might have to ask your dentist
Explanation:
Answer:
it really depens of ur treatment i had braces and it took a year and now i got them again and they say its gonna take a year so it depends on ur treatment
Explanation:
Who has a higher frequency X-ray or, radio waves?
Answer:
radio waves
Explanation:
I NEED HELP ASAP!!!!!! IM ON TIMER.
If hydrofluoric acid is a stronger acid than acetic acid, which statement is most likely true?
O The conjugate acid of hydrofluoric acid is weaker than that of acetic acid.
O The conjugate acid of hydrofluoric acid is stronger than that of acetic acid.
O The conjugate base of hydrofluoric acid is weaker than that of acetic acid.
O The conjugate base of hydrofluoric acid is stronger than that of acetic acid.
Answer:
C: The conjugate base of hydrofluoric acid is weaker than that of acetic acid.
Explanation:
I took the quiz and I put the answer that the other guy put and got it wrong but then it showed me the right answer which is C
Help me with this....
Answer:
1,3,4
Explanation:
Because you have to know what each one is
In an experiment temperature and the amount of NaCI dissolved in water were studied researchers changed the temperature of the water to see if it effects in the amount of NaCI being dissolved They conducted two tests one changing the temperature and another without changing the temperature the temperature change affected the amount of NaCI dissolved in water in this experiment the dependent variable is
Answer:
Dependent variable: Amount of NaCI dissolved in water
Explanation:
In an experiment, the DEPENDENT VARIABLE is the variable that the experimenter measures. It is the variable whose response is dependent on the independent variable.
In this experiment, researchers were studying the temperature and the amount of NaCI dissolved in water i.e. how a change in temperature affected the amount of NaCl dissolved. They conducted two tests one changing the temperature (experimental group) and another without changing the temperature (control group) the temperature change. It is clear that the RESPONDING/DEPENDENT VARIABLE IN THIS EXPERIMENT IS THE AMOUNT OF NACL DISSOLVED.
What functions are performed by the Brainstem?
Answer:
baning and stuff XD
Explanation:
Answer: regulation of breathing
Ability to sense pain
Regulation of circulatory system
Explanation:
How I do this? and I need help like now!
Answer:
1ohm
Explanation:
Compare the electric repulsion of the protons in the uranium nucleus (element 92) with the repulsion of the protons in the nucleus of barium (element 56).Which repulsion is larger?
Answer:
uranium nucleus
Explanation:
The charge on protons is positive. Hence repulsion is to be expected between the like charges.
The magnitude of repulsion between protons increases with the number of protons present in the nucleus.
Uranium possess 92 protons while barium possess only 56 protons. Hence uranium having a larger number of protons will experience a larger repulsion in its nucleus compared to barium.
how many moles of oxygen in 36.55 grams of CO2
Answer:
1.66 moles of oxygen
Explanation:
Given data:
Mass of CO₂ = 36.55 g
Number of moles of O = ?
Solution:
Number of moles of CO₂ = mass/molar mass
Molar mass of CO₂ is 44 g/mol
Number of moles = 36.55 g/ 44 g/mol
Number of moles = 0.83 mol
1 mole of CO₂ contain 2 moles of oxygen.
0.83 × 2 = 1.66 moles of oxygen
What would happen to the moons orbit if the earth disappeared
Calculate the density of an aluminum block with a volume of 100 cm3 and a mass of 270g.
Answer:
2.7 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{270}{100} = \frac{27}{10} \\ [/tex]
We have the final answer as
2.7 g/cm³Hope this helps you
PLEASE HELP!!!
A piece of wood has a mass of 2.85 g; when placed in 20.0 mL of water, the water volume increased to 23.4 mL. What is the density of this piece of wood?
_______ Answer _______Units
Answer:
d = 0.84 g/cm³
Explanation:
Given data:
Mass of wood = 2.85 g
Volume of water = 20.0 mL
Volume of water + wood = 23.4 mL
Density of wood = ?
Solution:
Volume of wood = (Volume of water + wood ) - Volume of water
Volume of wood = 23.4 mL - 20.0 mL
Volume of wood = 3.4 mL
1 mL = 1 cm³
Density of wood:
d = m/v
d = 2.85 g / 3.4cm³
d = 0.84 g/cm³
Can scientists determine a more precise age of this snail fossil?
Answer:
Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.
Explanation:
Answer:
mark the other person brainliest
Explanation:
Calculate the energy needed to raise the temperature of 165.0 g of water from 10.0°C to 40.0°C. The specific heat capacity for water is 4.2J/g °C.
Answer:
20790 J
Explanation:
From the question given above, the following data were obtained:
Mass (M) = 165 g.
Initial temperature (T1) 10 °C.
Final temperature (T2) = 40 °C.
Specific heat capacity (C) = 4.2 J/g °C.
Heat (Q) required =?
Next, we shall determine the change in temperature of water. This can be obtained as illustrated below:
Initial temperature (T1) 10 °C.
Final temperature (T2) = 40 °C.
Change in temperature (ΔT) =?
ΔT = T2 – T1
ΔT = 40 – 10
ΔT = 30 °C
Finally, we shall determine the heat energy required to raise the temperature of the water as follow:
Mass (M) = 165 g.
Specific heat capacity (C) = 4.2 J/g °C.
Change in temperature (ΔT) = 30 °C
Heat (Q) required =?
Q = MCΔT
Q = 165 × 4.2 × 30
Q = 20790 J
Thus, the heat energy required to raise the temperature of the water is 20790 J
A graph titled Energy Transferred for 50 grams of Metal with vertical axis Energy (Joules) and horizontal axis Type of Material. The first bar labeled sand goes up to 4 Joules. The second bar labeled aluminum goes up to 5 Joules. The third bar labeled steel goes up to 2.5 Joules. The fourth bar labeled lead goes up to 0.75 Joules. In an experiment, 50 g of each material were placed in a calorimeter with the same starting water volume and temperature. Which is the best interpretation of the chart? Lead has the highest specific heat of the four materials shown. The energy transferred and type of material are inversely proportional to each other. Different materials have different abilities to transfer energy. Mass and type of material are proportional.
Answer:
C
Explanation:
trust me got it right on e2020
Answer:
C. Different materials have different abilities to transfer energy.
Explanation:
What is the relationship between the kinetic energy of molecules in a solid and a liquid? Justify your response in two or more complete sentences.
will give brainliest
Answer:
Gases have more kinetic energy than liquids
Explanation:
Gases have more kinetic energy than liquids. Liquids have more kinetic energy than solids. When a substance increases in temperature, heat is being added, and its particles are gaining kinetic energy. Because of their close proximity to one another, liquid and solid particles experience intermolecular forces.
hope this helps
Which of the following Do plants gain form sunlight
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Rosa is breathing normally and eats a peanut butter sandwich for lunch. Peanut butter contains a lot of protein, and bread is mostly starch. Rosa plans to go for a run later this afternoon.
What does she need from the food she ate and the air she breathes so that she can go on her run? How do Rosa’s body systems work together to get the molecules she needs into her cells? How do her cells use these molecules to make energy for her body to run?
Answer:
She mainly needs the Peanut Butter because it has a lot of protein and her cells worked together to help her run.
Answer:
mostly PB for proteins
Explanation:
the importance of reproduction??
Answer:
The main significance of reproduction is to maintain continuity of species. It also helps in studying evolution as sexual reproduction results in variation among the species.The correct name for Mgl, is -
F magnesium iodide
G magnesium iodite
H magnesium (II) iodide
J magnesium diiodide
Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. Which best explains the reaction?
Answer:
The mass of sodium hydroxide will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water
The mass of hydrochloric acid will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water
Explanation:
Answer:
The mass of sodium hydroxide will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water
The mass of hydrochloric acid will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water
Explanation:
How many joules of energy are required to vaporize 512.0 g of water?
Answer:
The heat required to evaporate 512 g of water initially at 0°C is 1,371,340.8 J
Explanation:
The given parameters are;
The mass of water given in the question = 512.0 g
The specific heat capacity of water = 4.184 J/(g·°C)
The heat of vaporization of water = 2,260 J/g
The heat, Q, required to raise the temperature of 512.0 g from 0°C to 100°C is given as follows;
Q = 512 × 100 × 4.184 = 214,220.8 J
The heat required to vaporize 512.0 g of water at 100°C = Mass × Heat of Vaporization
The heat required to vaporize 512.0 g of water at 100°C = 512 × 2260 = 1,157,120 Joules = 1,157.12 kJ
The heat required to evaporate 512 g of water initially at 0°C is therefore;
214,220.8 J + 1,157,120 J = 1,371,340.8 J.
Which has the greater N-O bond length, NO 2 -1 or NO 3 -1 ?
Answer:
NO 2-1
Explanation:
1. How many moles of potassium are present in 4.23 x 1025 potassium atoms?
(show solution)
please help if u know only. ty
Answer:
70.26 moles
Explanation:
1 mole of potassium will contain 6.02 x 10²³ atoms of potassium
6.02 x 10²³ atoms of potassium = 1 mole
4.23 x 10²⁵ atoms of potassium = 4.23 x 10²⁵ / 6.02 x 10²³
= 70.26 moles .
Scientists now know that most elements come in more than one version. The different versions are called ____________. The difference between them is the number of neutrons in the nucleus.
Answer:
Isotopes
Explanation:
Scientists now know that most elements come in more than one version. The different versions are called Isotopes. The difference between them is the number of neutrons in the nucleus.
Isotopes usually differ in the mass number of the elements which is the reason why they also have a different neutron number. They may also differ in physical characteristics but would most likely have common chemical properties.