Answer:
things that pollute the air
Explanation:
nuclear energy, fossil fuels, gas from cars and other transportation, and these all contribute to greenhouse gases that are harmful to the environment
hope this helped!
Write the correct word equation for the following:
H2 (g) + NO (g) àH2O (l) + N2 (g)
Answer:" For example, when hydrogen gas, H2(g), is burned in the presence of gaseous oxygen, O2(g), a new substance, liquid water, H2O(l ), forms. The covalent bonds within the H2 molecules and O2 molecules break, and new covalent bonds form between oxygen atoms and hydrogen atoms (Figure 7.1)."
Explanation:
Explain Why a change in the state of matter is a physical change
Answer:
Cuz they are reversible changes that do not change matter's chemical makeup or chemical properties. Processes involved in changes of state include melting, freezing, sublimation, deposition, condensation, and evaporation.
Explanation:
please help wit this , thank you !
Which statement best describes the role of the respiratory system?
5 points
O collects waste produced by cells and removes it from the body
it breaks down food, absorbs nutrients, and gets rid of solid waste
brings oxygen into the lungs and releases carbon dioxide and water (waste materials)
from the body.
the body's transportation system
Answer:
Brings oxygen into the lungs and releases carbon dioxide and water ( waste materials) from the body ...is Answer of your question.
Thank you ☺️☺️
4. Question in attached image.
Answer: 5.1 x 10^-3 < 0.0057 < 4.9 x 10^-2 < 0.0072 x 10^2 < 5.3 x 10^4 < 57 x 10^3
Because:- 5.3 x 10^4 = 53000
57 x 10^3 = 57000
4.9 x 10^-2 = 0.049
0.0057 = 0.0057
5.1 x 10^-3 = 0.0051
0.0072 x 10^2 = 0.72
___________________________
Hope it helped u,
so pls put thanks and pls mark this as the brainliest
The Theory of Continental Drift says that the continents were once joined together and are drifting apart. Who is given credit for coming up with this theory? Question 5 options: Charles Darwin Alfred Wegener Marie Curie Alfred Wallace.
The Theory of Continental Drift says that the continents were once joined together and are drifting apart, Alfred Wegener is given credit for coming up with this theory.
What is continental drift?Continental drift is a kind of illusion in which it looks like that continents changes their places over the surface of the earth. The Theory of Continental Drift was given by Alfred Wegener, it is a hypothesis and according to this theory the continents will move with respect to the geological time relative to each other. And due to their movement on the non planar or dynamic geographical base it looks like a drift.
Hence, option (2) is correct i.e. Alfred Wegener gave this theory.
To know more about continental drift, visit the below link:
https://brainly.com/question/394265
Answer:
a
Explanation:
20. A substance with a high volatility A. has a high boiling point. B. tends to stay in the liquid or solid phase. C. readily evaporates. D. can never be a liquid.
According to this question, a substance with a high volatility readily evaporates.
What is volatility?Volatility is the characteristics of a material which describes how readily the material undergo vaporization.
Volatile substances readily change phase from solid or liquid to gases via the process of vaporization.
Therefore, according to this question, a substance with a high volatility readily evaporates.
Learn more about volatility at: https://brainly.com/question/1603761
which of the following does not conduct electricity easily
1. silver
2. plastic
3. copper
4. salt water
Answer:
NaCl (common salt) is solid in state and solid ions or compounds don't conduct electricity. It needs to be either melted, molten or dissolved in a solution (i.e. water) first.
Explanation:
FIRST TO ANSWER GETS BRAINLIEST! :)
C- main sequnce
Regulus A is a binary star consisting of a blue-white main sequence star of spectral type B7V, which is orbited by a star of at least 0.3 solar masses, which is probably a white dwarf. The two stars take approximately 40 days to complete an orbit around their common centre of mass.
If 9000. J of heat are absorbed by 800. g of water at 25.0oC, what will be its final temperature?
Answer:
22 626 000 J. = 22 626 kJ. 4. If 9000 J of heat are absorbed by 800 g of water at 5.0 o. C, what maximum temperature will the water attain? Q = mc ∆T.
Explanation:
The final temperature can be calculated using the calorimetric equation. Here, the final temperature of water is 27.71 °C.
What is calorimetric equation ?The calorimetric equation connecting the heat energy absorbed or released q by a system with the mass m, temperature difference ΔT and the specific heat capacity c as follows:
q = m c ΔT
The specific heat capacity of water = 4.15 J/ °C g.
given that heat energy absorbed q = 9000 J
mass = 800 g
initial temperature = 25 °C.
Then,
9000 J = 4.15 J/ °C g. × 800 g (25 °C + T)
then T = [ 9000 J/ 4.15 J/ °C g. × 800 g ] + 25 °C = 27.71 °C.
Therefore, the final temperature of water is 27.71 °C.
Find more on calorimetry:
https://brainly.com/question/30884598
#SPJ2
What describes the energy an object has because of its motion
Answer:
Kinetic Energy
Explanation:
The energy an object has due to its motion is called kinetic energy.
what are genetics in scientific form?
Answer:
Genetics is the scientific study of genes and heredity.
Explanation:
URGENT!! 20 Points Please Help!! WIll mark brainliest!! My assignment is due in 10 minutes!!
3.) Make the following conversions:
a.) 157cs to seconds
b.) 42.7L to milliliters
c.) 261nm to millimeters
d.) 0.065km to decimeters
e.) 642cg to kilograms
f.) 8.25 × [tex]10^{2}[/tex]cg to nanograms
Answer:
a: 157cs = 1.57s
b: 42.7L = 42,700mL
c: 261nm = 0.000261mm
d: 0.0065km = 65dm
e: 642cg = 0.0064km
f: 8.25 x 10^2cg = 8,250,000,000ng
Answer:
a) 1.57
b) 42,700
c) 0.000261
d) 650
e) 0.00642
cant figure out f
Explanation:
Vocabulary-what is a fossil
What is the wavelength of a 264-Hz sound wave when the speed of sound is 345 m2 1.31 m A. 0.77 m C. 6.09 m D. 0.11 m
The wavelength : 1.31 m
Further explanationWaves are vibrations that travel
There are several parts of the wave namely:
frequency, period, wavelength and wave velocity
Frequency (f): the number of waves that occur in one second
Period (T): The time required to travel one wave
Wavelength (λ): the distance from one crest to another, or from one trough to another (on transverse waves) and the distance between two consecutive compressions or between two consecutive rarefactions (on longitudinal waves)
Fast wave propagation (v): the distance traveled by waves per unit of time
The formula:
[tex]\tt v=\lambda\times f[/tex]
The speed of a sound wave 345 m, and the frequency = 264 Hz , so
v = 345 m
f = 264 Hz,
then the wavelength :
[tex]\tt \lambda=\dfrac{v}{f}=\dfrac{345}{264}=\boxed{\bold{1.31~m}}[/tex]
What is the gravitational force cause
Answer: Gravity
Explanation: The answer is gravity: an invisible force that pulls objects toward each other. ... So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body.
What is different between an ionic bond and a covalent bond?
A An ionic bond is a bond between charged atoms, while a covalent bond is a bond between opposite charges.
B An covalent bond is a bond between charged atoms, while an ionic bond is a bond between neutral atoms.
C An ionic bond is a bond between charged atoms, while a covalent bond is a bond between neutral atoms.
D An ionic bond shares electrons, while a covalent bond is an attraction between opposite charges.
Answer:
Explanation:
Ionic bonds result from transfer of electrons, whereas covalent bonds are formed by sharing. 2. Ionic bonds are electrostatic in nature, resulting from that attraction of positive and negative ions that result from the electron transfer process; charge separation between covalently bonded atoms is less extreme.
Find the density of evaporated milk if 411 grams occupy 384 cm^3
Answer:
The answer is 1.07 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 411 g
volume = 384 cm³
We have
[tex]density = \frac{411}{384} \\ = 1.0703125[/tex]
We have the final answer as
1.07 g/cm³Hope this helps you
PLSSS HELP Which reaction is endothermic? *
2 points
HCl + NaOH → NaCl + H₂O + 58 kJ
2Na + Cl₂ → 2NaCl + energy
6CO₂ + 12H₂O + energy → C₆H₁₂O₆ + 6O₂ + 6H₂O
The last one is endothermic, as you can notice we are using up energy (absorbing energy) in order for the reaction to occur.
Whereas the other ones release energy, as they are considered exothermic.
What volume will 8.47kg of sulfur dioxide gas occupy at a pressure of 89.4kPa and a temperature of 40.0°C?
Answer:
[tex]V=3850.1769\;L[/tex]
Explanation:
Gas law is the mathematical relationship among pressure,volume, temperature, and the number of moles of a gas. It is the equation of state for an ideal gas. Which is because the state of a gas can be known by it pressure, volume, temperature, and number of moles.
Look below which "R" is a constant
[tex]PV=nRT[/tex]
[tex]n=8.47kg\times(\frac{1000g}{1kg})\times(\frac{1mol}{64.066g})[/tex]
[tex]n=132.2074\;mol[/tex]
[tex]V=\frac{nRT}{P}[/tex]
[tex]V=\frac{(132.2074\\;mol\times(8.314\frac{L\cdotkPa}{mol\cdotk)}\times(40+273.15)k}{89.4\;kPa}[/tex]
or (3.85 x 10^3 L)
[tex]V=3850.1769\;L[/tex]
~Lenvy~
What is meant by”the ozone hole”?
Answer:
The term ‘ozone hole’ refers to the depletion of the protective ozone layer in the upper atmosphere (stratosphere) over Earth's polar regions. People, plants, and animals living under the ozone hole are harmed by the solar radiation now reaching the Earth's surface—where it causes health problems, from eye damage to skin cancer.
The laboratory equipment below is called
Answer:
The laboratory equipment is called beaker
What do we need to know to convert SI units for any measurement?
Answer:
Knowing the units of measurement that correspond with a number can give you so much more information than a digit sitting there by itself. Units can: Help to show another person the exact amount you have.
Explanation:
How do scientists know how atoms are structured?
Explanation:
i guess it's through thousands of research and experiments they conducted
The molar mass of nitrogen (n2) is 28.02 g/mol. what is the mass, in grams, of 4.60 mol of n2? 0.164 grams 6.09 grams 23.4 grams 129 grams
The mass in grams of 4.60 mol of nitrogen is 129g.
How we calculate mass from moles?Mass of any substance will be calculated by using their moles as:
n = W/M, where
W = required mass
M = molar mass
Given molar mass of nitrogen (N₂) = 28.02 g/mol
Given moles of nitrogen (N₂) = 4.60 mole
On putting these values on the above equation and calculated for W, we get
W = (4.60 mol)(28.02 g/mol)
W = 128.89g = 129g
Hence the required mass is 129g.
To know more about moles, visit the below link:
https://brainly.com/question/13860160
Answer:
D
Explanation:
What is dimensional formula of specific heat
capacity with process
.
Answer:
The heat capacity of an object is an amount of energy divided by a temperature change, which has the dimension L2·M·T−2·Θ−1. Therefore, the SI unit J/K is equivalent to kilogram meter squared per second squared per kelvin (kg m2 s−2 K−1 ).
Explanation:
which of these is important to gathering and interpreting scientific information?
A.) Logic
B.) Emotion
C.) Legend
D.)Religion
Answer:
A. Logic
Explanation:
Answer:
Logic. When interepreting scientific information you have to always use logic
Explanation:
What is the relationship between the way in which radiant energy travels and how it is absorbed by different materials?.
The greater a habitat's biodiversity, the greater will be the habitat's, sustainability over time with varying conditions sustainability over time with varying conditions consumption of energy in the form of sunlight consumption of energy in the form of sunlight temperature ranges across the seasons temperature ranges across the seasons distance to the nearest water source distance to the nearest water source
Answer:
The correct answer is: sustainability over time with varying conditions.
Explanation:
A habitat can be defined as the physical and geographical conditions that will positively influence the development of life, in any form.
Therefore, it is correct to say that sustainability over time with favorable conditions will favor the greatness of the habitat.
Sustainability is the ability to preserve a system for the maintenance of future life, so it is ideal for there to be sustainable development across society, so that natural resources are preserved so that biodiversity continues to exist.
What are the expanded electron configurations for Ca, B, C, Si?
Answer:
[Ar] 4s²
Explanation: