Science is used to stop things the are incrediblu diffucult to deal with therefore jeg spiser ikke dreng
The answer is
It can identify the sources of polluted water.
Describe how muscles make movement
Answer:
Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
Explanation:
Hope it helps
What are valence electrons and why are they important to know about for bonding of atoms into molecules?
Answer:
valence electrons are the electron in an outermost shell of an atom of an element (it is also called the outermost electron).
They are important for bonding because, when you bond two or more atom of an element, it is the outermost electron (valence electron) that will do the sharing of electrons when two atoms are bonded together.
8. Name at least three properties of stars revealed by spectral characteristics:)
A stellar spectrum can reveal many properties of stars, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.
What is the potential energy of your 3kg puppy that is sitting in the grass in your backyard
Answer:
0J
Explanation:
The potential energy of the sitting puppy is 0J.
Since we have been given the mass of the puppy to be 3kg, to find the potential energy, we use the expression below:
Potential energy = mgh
m is the mass
g is the acceleration due to gravity
h is the height
So the puppy is sitting on the grass, the height is 0m
Therefore, Potential energy is 0J
In an aqueous solution of potassium chloride, the solute is *
1. KCI
2. O H20
3. K
4. CI
Answer:
1.KCl is answer
Explanation:
when potassium chloride KCl is dissolved in water,it will dissociate to form k+ and cl- .thus,the solute must be k+Cl- .
I hope it's helpful!
The substance dissolved in a solvent or water is called a solute it makes up the homogenous mixture called solution by getting dissolved in it.
The [tex]\rm KCl[/tex] is the solute in the aqueous solution of [tex]\rm KCl[/tex].
The solute can be explained as:The substance that dissolves in an aqueous solvent or any other solvent to form a solution is called a solute.[tex]\rm KCl[/tex] is a solute that dissolves in the water to yield [tex]\rm K^{+}[/tex] and [tex]\rm Cl^{-}[/tex] ions to produce the solution of potassium chloride.Therefore, option A, [tex]\rm KCl[/tex] is the solute.
Learn more about solute and solvent here:
https://brainly.com/question/14521586
the three-legged dog, has a mass of 24Kg and accelerates .85 m/s. How much force is needed to get Lucky moving
Answer:
the answer is 2040
Explanation:
force is given as the product of mass and acceleration
The molecular mass of a substance is defined as the mass of how many molecules of the substance
Answer:
Explanation: The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance
Rank the states of matter from particles with the least amount of attraction (1st) to particles with the most attraction (3rd). State of Matter Rank (1st, 2nd, 3rd)
Solid
Liquid
Gas
Which statement(s) is/are TRUE about covalent bonds?
Covalent bonds can form between atoms of
different elements.
Covalent bonds can form between a metal atom
and a nonmetal atom.
Covalent bonds can form between two metal
atoms.
Covalent bonds can form between two nonmetal
atoms.
Covalent bonds can form between atoms of the
same element.
Answer:
1. Covalent bonds can form between two nonmetal atoms.
2. Covalent bonds can form between atoms of the same element.
3. Covalent bonds can form between atoms of different elements.
Explanation:
I hope this helps u! :D
Explanation:
How can you tell if a sample contains baking soda and cornstarch or baking powder?
Answer:
To find out if a sample has baking soda we can add vinegar.
Explanation:
When vinegar (acetic acid) is mixed with salt (sodium bicarbonate), water, carbon dioxide and sodium acetate are formed. We see the formation of bubbles (which is carbon dioxide, which is a gas).
what are the 3 phases of matter?
Answer:
The three major phases of matter are Solid, Liquid, and Gas. But there is also Plasma
All parts of the rock cycle are connected, whether directly or indirectly. Which statement
best shows how sedimentary rocks are related to igneous rocks?
1.Under pressure, sedimentary rocks form from igneous rock.
2.Igneous rocks can weather, creating sediments that form sedimentary rocks.
3. During weathering, sedimentary rocks melt and form igneous rock.
4.Under pressure, igneous rock undergoes changes that form sedimentary rock.
Answer:
2. Igneous rocks can weather, creating sediments that form sedimentary rocks
Explanation:
Sedimentary rocks are formed from Igneous rocks when rocks are broken down by weathering.
Natasha and Reanna observe a large airplane in the troposphere. Which experimental setup below would best determine how changing wind speeds might affect the airplane’s flight time to its destination?
The airplane's flight time is the test variable (independent variable), the wind speed is the outcome variable (dependent variable), and the airplane is the constant.
The airplane's flight time is the outcome variable (dependent variable), the wind speed is the test variable (independent variable), and the airplane is the constant.
The airplane's flight time is the constant, the wind speed is the outcome variable (dependent variable), and the airplane is the test variable (independent variable).
The airplane's flight time is the test variable (independent variable), the airplane is the outcome variable (dependent variable), and the wind speed is the constant.
Answer:
i am pretty sure the answer is a
Explanation: because the airplane's flight time has to be the independent variable for it to affect the dependent variable that is the speed of how fast the airplane is going.
Independent variables are test variables where we are testing its effects on the dependant variables. Here wind speed is the independent variable and time of flight is dependant variable.
What are variables?Variables are values or components in an experiment which can be measured and will change by time. In an experiment there are two kinds of variables namely independant and dependant variables.
Dependant variables are those which changes with effect of independent variables. For example if we are studying the effect of water quality in the population of fish in a pond. The independent variable is the quality of water and fish population is the dependent variable.
Here the time of flight depends on the wind speed. Thus, flight time is the dependant variable and wind speed is the test variable or independent variable.
To find more about variables, refer the link below:
https://brainly.com/question/17344045
#SPJ6
An Atom that was neutral has now gained 3 electrons. Do you think this Atom will become a cation or an anion?Why?(In at least 2 sentences.)
Claim
Evidence
Reasoning
Answer: It will become an anion. Anions are negatively charged molecules. So if the molecule is charged by electrons and electrons have a negative charge, it must form an anion.
Explanation:
which group served as the control in this investigation
Answer:
What is the investigation?
Explanation:
.
A hot plate, a large beaker of water, and grains of rice are used in a class demonstration. When the water begins to boil, the rice moves in a circular pattern. The model demonstrates
Answer:
Conduction
Explanation:
The atmosphere consists of (a) Gases only (b) Water vapour only (c) Chemicals (d) Gases and water vapours science
Answer:
(d) Gases and water vapour
Explanation:
The atmosphere is a part of the Earth that contains predominantly gases or gaseous substances. In other words, the atmosphere is a combination of different gases, including water vapour.
Atmosphere is said to contain the following gases in the following proportion:
- Nitrogen (78%)
- Oxygen (21%)
- Argon (0.9%)
- Carbon dioxide (0.04%)
- Water vapour (1-4%)
Therefore, the Earth's atmosphere consists of many gases and water vapour.
A substance which retains its magnetic properties for a long period is called a ______.
Answer:
Explanation:
magnet please give brainliest
How many moles of zinc chloride will be produced when 112 grams of zinc oxide is used?
Answer:
1.38 moles
Explanation:
My teacher gave us the answer on a quiz so here if y’all want a explanation I’ll give y’all one tho
cal the vol of carbon(ii)oxide produced at stp by. d dehydration of 6.00g of methanoic acid with concentrated H2SO4 carbon=2 oxygen=16 hydrogen=1
molar volume = 22.4dmcube
The volume of CO= 2.912 L
Further explanationGiven
Dehydration of 6 g of methanoic acid with H2SO4
Required
The volume of CO
Solution
Reaction
HCOOH ⇒ CO+H₂O
MW = 1.Ar C+2.Ar H+2.Ar O
MW = 1.12+2.1+2.16
MW= 46 g/mol
mol = mass : MW
mol = 6 g : 46 g/mol
mol = 0.13
From equation, mol ratio HCOOH : CO, so mol CO = 0.13
Vm = 22.4 L
so for 0.13 mol :
= 0.13 x 22.4 L
= 2.912 L
In the chemical formula for table sugar C12H22O11, How
many oxygen atoms are in each sugar molecule?
Answer:
Number of oxygen atom = 11
Explanation:
Given:
Table sugar C₁₂H₂₂O₁₁
In the given formula;
Number of carbon atom = 12
Number of hydrogen atom = 22
Number of oxygen atom = 11
Answer:2
Explanation:2w2222
Can someone please help me !!
- It would mean a lot ❤️
_______________________________
KendallIf something is heretic, it refers to certain characteristics that is coded in our DNA. In science we know that this is possible through understanding the workings of the chromosomes & their functions.
_______________________________
Which of the following group of salts can be prepared by direct combination
a sulphate
b nitrate
c chloride
d phosphate
What three steps are involved in forming igneous rocks? WILL GIVE BRAINLEST AND POINTS
Melting, cooling, and hardening
Freezing, heating, and hardening
Melting, condensing, and softening
Freezing, evaporating, and softening
Answer:
I am pretty sure it is the first one: Melting, cooling and hardening
Explanation:
igneous rocks are made of molten lava and then they cool down and harden form into a rock. PLEASE correct me if i am wrong.
10.8 g of aluminium reacts with excess oxygen to form aluminium oxide: 4Al + 3O2 → 2Al2O3. What is the theoretical yield of aluminium oxide? (Relative masses: Al = 27.0, Al2O3 = 102.0)
Answer:
Theoretical yield = 40.8g
Explanation:
4Al + 3O2 ----] 2Al2O3
if 27.0g of Al ----] 102.0g of 2Al2O3therefore 10.8g -----] xg10.8g×102.0g/ 27.0g
theoretical yield = 40.8 g
Answer:
20.410 grams of Al2O3 are produced
Explanation:
First, we need to calculate the number of moles of aluminum that are actually reacting..
We will convert from grams to moles using the atomic weight which (for aluminum) is 26.982 g/mol (which can also be rewritten as 1 mol/26.982)
10.8 g Al * 1 mol Al/26.982 g Al = 0.4002668446 moles Al
**Grams cancel out, so we are left with moles
(I would type this differently so that it would make more sense visually, however brainly is giving me errors, so try writing it out yourself if it doesn't initially make sense..put the equation in fraction form)
Now that we have the moles of Al, we will convert from moles of Al reacting to moles of aluminum oxide produced..
To do this we will use the balanced chemical equation..
4Al + 3O2 -> 2Al2O3
Using the balanced chemical equation, we can see that for every 4 moles of aluminum that react, 2 moles of aluminum oxide are produced..
0.4002668446 moles Al * 2 mol Al2O3 / 4 mol Al
= 0.2001334223 moles Al2O3..
Now we need to convert from moles of Al2O3 to grams..
We can do this using the atomic weight of Al2O3..
The atomic weight of Al2O3 is 101.961 g/mol or 1 mol/101.961 grams
Now we will convert to grams of Al2O3...
0.2001334223 moles Al2O3 * 101.961 grams Al2O3/1 mol Al2O3
= 20.40580387..
20.410 grams of Al2O3 are produced
Several balloons are inflated with helium to a volume of 0.75 L at 27°C. One of the balloons was found several
hours later, the temperature had dropped to 22°C. What would be the volume of the balloon when found, if no
helium has escaped? (0.74L)
Answer:
V₂ = 0.74 L
Explanation:
Given data:
Initial volume of balloon = 0.75 L
Initial temperature of balloon = 27°C (27+273.15 K = 300.15 K)
Final volume of balloon = ?
Final temperature = 22°C (22+273.15 K = 295.15 k)
Solution:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 0.75 L × 295.15 k / 300.15 K
V₂ = 221.36 L.K / 300.15 K
V₂ = 0.74 L
The given problem is solved through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
Which energy level has the most energy available to it?
4
3
2
1
please help! I've asked the question twice now.
Can you help me with drawing the structure of 3 propyl hex-1-ene?
Answer:
I have the image drawn, it'll be attached.
Explanation:
3 propyl hex-1-ene
Which combination is most likely to form a precipitate?
A. ammonium hydroxide
B. barium chloride
C. calcium hydroxide
D. calcium acetate
E. iron hydroxide
Answer:
A - Ammonium Hydroxide (NH3)
Explanation:
• Metals are just too weak
• Calciums' have a low success rate
• Barium is good, but Ammonium is just stronger.
(This is just an opinion, I could definitely be wrong so just do corrections in class. Sorry)
Answer:
A
Explanation:
I think lol
Which of the following statements accurately
paraphrases evidence from the article to support
the conclusion?
A
Quantitative data is based on numbers, while
qualitative data is based on observations.
B.
Qualitative observations often lead to deeper
study using quantitative measurements.
С
Qualitative data is based on numbers, while
quantitative data is based on observations,
D
Quantitative observations often lead to deeper
study using qualitative measurements
