Answer:
well it depends are they carnivors or eating soup or are they sucking on co2
Explanation:
all of them have a good day
Answer: the answer is selecting all three ( solids, liquids, gasses) (elements, compounds, and mixtures) (living things, and nonlinear things)
Explanation: I got it right:)
What is created when a wire moves between the poles of a magnet?
A. An electric current
B. A solenoid
C. An electromagnet
D. A ferromagnet
Answer:
An electric current is created
An electric current is created when a wire moves between the poles of a magnet.
So, option A is correct.
What is Electric current?The movement of positive or negative electric particles such as electrons through electric conductor or space is called electric current.Types of electric current are direct current (DC) and alternative current (AC)The SI unit of electric current is Ampere.The poles of a magnet creates magnetic field through such effect the movement of electrons in the wire starts and creates electric current.What is direct current (DC) ?The current which glows in only one direction consistently is called direct current.The current that flows in a flashlight or another appliances which run through a battery is an example of direct current.What is alternative current (AC)?A type of electric current in which the direction of the flow of electrons switches back and forth at regular interval or cycles.Current flows in power line is an example of alternative current.learn about electric current,
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27. What element has this electron configuration: 1s2 2s22p6 352 3p6 452
3d10 4p4
Choices:
Sulfur
Selenium
Arsenic
Tellurium
Answer:
Selenium
Explanation:
One way to figure this out is to count the electrons and add them up.
2+2+6+2+6+2+10+4 = 34 electrons
A neutral atom has the same number of electrons and protons. Protons tell us the atomic number of an element. Element number 34 is Selenium.
Another way to figure it out is to look at just the highest "s" or "p" level of the electron configuration, and then see which element corresponds to that. This element has a 4s and a 4p, so I will look at 4p. The configuration is 4p4, so I will look at the 4th row of the periodic table (4p4) in the "p" block (4p4) and the 4th element in the "p" block (4p4). That's selenium :)
Nitric acid is a highly reactive acid with the chemical formula HNO3. It is a clear, colorless and odorless liquid at room temperature that is nonflammable. How many different elements make up one molecule of nitric acid? A. Three B. Four C. Five D. Two
Nitric acid, is a highly corrosive mineral acid. The pure compound is colorless, but older samples tend to acquire a yellow cast due to decomposition into oxides of nitrogen and water.
There are THREE different elements and a total of FIVE atoms in nitric acid.
The formula for nitric acid is HNO3. This means there is one atom of hydrogen, one atom of nitrogen, and three atoms of oxygen in one molecule of nitric acid.
So, Thus, your answer will be FIVE if you're counting the molecules but if you are counting the elements then it is THREE.
-Snooky
*
What does the temperature measure?
A)Total Kinetic Energy of Matter
b) Average Potential Energy of Matter
C) Average Kinetic Energy of Matter
D)Total Potential Energy of Matter
Answer:
it would be C average kinetic energy
Which is an example of balanced forces?
A.a door starting to open
B.a basketball being held
C.a truck beginning to accelerate
D.a book falling off a table
Answer: B. a ball being held
Explanation: while your holding the ball the potential energy is greater than the kinetic
The offspring of sexual reproduction typically ----.
A. develops genetic material independent of any other source
B.gets all of its chromosomes from one parent
C.gets more of its chromosomes from one parent than the other
D.gets half of its chromosomes from each parent
Find the mass of 2 moles of:
1. Oxygen atoms
2. Oxygen molecules
Answer: 1. 2 moles of oxygen atoms = 32 grams
2. 2 moles of oxygen molecules = 64 grams
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number of particles.
1 mole of oxygen atom (O) weighs = 16 g
Thus 2 moles of oxygen atom (O) weighs = [tex]\frac{16}{1}\times 2=32 g[/tex]
Also 1 mole of oxygen molecule [tex](O_2)[/tex] weigh = 32 g
Thus 2 moles of oxygen molecule [tex](O_2)[/tex] = [tex]\frac{32}{1}\times 2=64 g[/tex]
This graph shows how the potential energy of a reaction system changes
over time. Which statement is true for this system
A. The potential energy of the reactants is greater than the potential
energy of the products.
B. The height of the curve at point A represents the activation energy.
C. The height of the curve at point B represents the activation energy.
D. The potential energy of the products is greater than the potential
energy of the reactants.
Answer:
Answer is C since activation energy is needed in a reaction
Potential energy is the energy present in the reactions. The potential energy of the reactant in the graph is more than that of the product. Thus, option A is accurate.
What is potential energy?Potential energy is the energy of the reaction that results in the formation of products. The potential energy is reduced in the exothermic reactions as energy is released along with the products.
The bonds present in the reactants in the reaction mixture split in the presence of the activation energy to release energy and form the product.
Therefore, option A. the graph shows the greater potential energy of the reactant.
Learn more about potential energy here:
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Question 14 (1 point)
A magnesium atom has 11 neutrons. What is the mass of this magnesium atom?
Answer:
Mass=23
Explanation:
Mass= Protons + neutrons
Atomic number is the number of protons in magnesium.
Atomic number =12...So there are 12 protons
12p + 11n = 23
If you have 4 moles of barium hydroxide, how many moles of oxygen atoms do you
have?
Answer:
8 moles of oxygen.
Explanation:
The chemical formula for barium hydroxide is Ba(OH)₂
This means one mole of barium hydroxide contains one mole of barium, two moles of hydrogen, and two moles of oxygen. If you have four moles of Ba(OH)₂ you will have four times the amount that is found in one mole.
4 moles of Ba(OH)₂ will have 8 moles of oxygen.
The number of moles of oxygen atoms we have in the compound is 8 moles .
The chemical equation for barium hydroxide is as follows:
Ba(OH)₂
According to the compound we have 1 atom of barium, 2 atoms of oxygen and 2 atoms of hydrogen.
Therefore, 4 moles of the compound can be represented as follows;
4 Ba(OH)₂
This means we have 4 atoms of barium, 8 atoms of oxygen and 8 atoms of hydrogen.
Therefore, we have 8 moles of oxygen atoms or 4 moles of oxygen molecules.
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Which of the following is NOT an example of a chemical reaction?
A loaf of bread is sliced with a knife
A loaf of bread is baked in an oven
A loaf of bread is digested in the stomach
A loaf of bread molds in a pantry
Answer: D
Explanation:
because mold is a chemical reaction with with the air that's why the put a date cause the bread can only last for so long in till the chemical reaction.But D is is right because your body has to go though a chemical reaction in or to digest it and and break it down even more.So D would be the right answer cause that's where most of your chemical reaction happens when food is swallowed into the stoamch i hope i was able to explain it as much as i can
Which of the following conditions creates the largest waves?
Question 3 options:
strong winds that blow in short spurts over a small distance
strong winds that blow over a great distance for a long time
strong winds that blow for a long time over small distances
Answer:
strong winds that blow in short spurts over a small distance
Explanation:
Generally, the most common factor that causes the largest waves in the ocean is winds. this is also called wind-driven waves of the ocean when the surface wind flows on the surface of the ocean, this disturbance creates the friction between surface wind and surface of the ocean which creates waves in the ocean
Answer:
B
Explanation:
k-12 test
(NH4)2SO4(s) + 2NaOH(aq) → Na2SO4(aq) + 2NH3(g) + 2H200)
What mass of sodium hydroxide is required to react
completely with 15.4 g of (NH4)2SO4?
Answer:
9.36 grams NaOH needed
Explanation:
Given Rxn
(NH₄)₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄(aq) + 2NH₃(g) + 2H₂O shows a molar reaction ratio of 1-mole (NH₄)₂SO₄ to 2-moles NaOH. If the 15.4 gram sample of (NH₄)₂SO₄ is converted to moles, then 2 times moles of ammonium sulfate will be the molar amount of NaOH needed to completely react. Complete computation by converting moles to grams NaOH; that is, multiply by formula wt. of NaOH (=40g/mol).
moles (NH₄)₂SO₄ = 15.4g/132.14g·mol⁻¹ = 0.117 mole (NH₄)₂SO₄.
moles NaOH = 2 x 0.117-mole = 0.234-mole NaOH needed.
∴grams NaOH needed = 0.234-mole NaOH x 40-g NaOH/mole NaOH = 9.36 grams NaOH needed. (3 sig. figs.)
Then multiply 0.117 mole by 2 => 0.234 mole NaOH needed to completely react with the 0.117 mole (NH₄)₂SO₄. Converting to mole to grams, multiply by formula wt. of NaOH => 0.117 mole x 40g/mole = 9.36 grams NaOH needed.
where do cells get the instructions on how to build proteins ? help
Answer:
Inside the DNA molecules
Answer:
Genes give instructions to proteins; protein structure determines traits.
Explanation:
Antoine put some metal into a container with air. He closed the container. He measured the weight of the closed container with the metal; it weighed 250 grams. Then he heated the container until the metal changed colors. He weighed the closed container after heating. Predict the weight of the closed container (greater than 250 grams, equal to 250 grams, less than 250 grams) after heating. Enter your answer in the space here.
Answer:
the same
Explanation:
due to the law of conservation of mass, the mass will not change
Answer: The mass will be the same it will not be able to change.
Explanation: due to the law of conservation of mass, the mass will not change telling us that the mass and the grams or whatever it was saying on there will stay exactly no change. so the 250 grams will not change.
Regarding water molecules, adhesion is best described as * the attraction water molecules have to other water molecules the attraction water molecules have to ionic substances the attraction water molecules have to polar substances the attraction water molecules have to other surfaces
Answer:
the attraction water molecules have to other surfaces
Explanation:
Adhesion is defined as the attractive forces between unlike substances, e.g water moving up a capillary tube.
Adhesion is the tendency of dissimilar particles or surfaces to cling to one another(Wikipedia).
So, what we mean by adhesion in this context, is the attraction water molecules to other surfaces.
3. What do you think is the primary reason why the Unionid mussel population declined whenever there is a dramatic increase in the Zebra mussel population?
When the Zebra arrived they ate all the food in the area leaving Unionid numbers to decline and die as they have no food to eat.
Carbon C , reacts with excess sulfur dioxide , SO2 , to produce carbon disulfide, CS2 , and carbon dioxide, CO2 according to the following equation .
3C(s) + 2SO2(g) ⇉ CS2(I) + 2CO2(g)
How many grams of CS2 are produced when 6.00 moles of C reacts completely with excess amount of SO2 gas ?
Answer:
sorry sorry sorry sorry
What is 24.3 – 15.45 when accounting for sig fig rules?
Answer:
8.85 because im smart
How many grams are in
.093 liters of o2, gas at STP?
Answer:
0.13 grams of O2
Explanation:
Just did worksheet
An object moves from one location to another that has a different gravitational pull. How would the object's mass be affected?
NEED HELP ASAP GIVING 20 POINTS AND BRAINLIEST
Given 18.5 grams of CHA and 24.0 grams of Oz the following reaction occurs. Calculate the number of grams of
carbon dioxide that form from the reaction.
CH4 + 20 + CO2 + 2 H2O
Answer:
CO2 should be 50.88 g
Explanation:
CH4 + 2 O2 --> CO2 + 2 H2O
First, find the moles of CH4:
Molar Mass of CH4 (formular mass):
12+1*4=16 g/mol (actually just use the atomic mass in your periodic table to add them up)
Then we can find how many moles in CH4 = 18.5÷16=1.15625 mol
As we know 1 mole of methane(CH4) makes 1 mole of CO2, so if 1.15625 moles of methane is reacted, 1.15625 moles of CO2 will be made.
So the moles of CO2 is 1.15625 moles.
Calculate the mass of CO2:
Molecular mass: 12+16*2=44 g/mol
Mass=44*1.15625=50.88 g (cor. to 2 d.p.)
Hi! I'm going to give brainliest to the person who answers this first/best. It has the answer choices. Thanks!
Answer:
the answer is electron....
please hurry
You discover a substance that is made of 10.6 g of Carbon and 4.4 g of Hydrogen.
(Use this to calculate empirical formula.)
The molar (molecular mass) of the compound is 68.204 g/mol.
(Use this when solving for molecular formula.)
What is the percent composition of this substance? (Make sure you percent has two (2) decimal places.)
What is the empirical formula of your substance? (Do not worry about making the numbers subscript).
What is the molecular formula of your substance? (Do not worry about making the numbers subscript).
please explain your answers
Explanation:
Elements contained. C. H
% by mass. 10.6. 4.4
/ each by its a.m. 10.6/12.0. 4.4/1.0
amount. 0.88. 4.4
/ each by the smaller. 0.88/0.88. 4.4/0.88
ratio of amount. 1.00. 5.00
simplest whole number ratio= 1 : 5
The empirical formula=CH5
Ella is interested in combining substances to form a new material.
She read about some of the products chemists have discovered. She learned that sometimes synthetic materials are created accidentally. For instance, a chemist working on plastic gun sights synthesized a very sticky material accidentally. Which product had he accidentally made?
A. a coil spring toy
B. a heavy-duty adhesive glue
C. a new sweetener
D. a non-stick surface
please hurry
3 poi
27) Name the neutral element with this Noble Gas shorthand
configuration.
- What is the concentration of hydrogen ions if the pH is 12?
Answer:
There are
1.479
×
10
−
13
concentration of hydrogen ions
m
o
l
L
.
Explanation:
Because pH is a logarthmic scale, we can use the formula:
[
H
+
]
=
10
-pH
. Where...
=>
[
H
+
]
is the concentration of hydrogen ions in the solution.
=>
p
H
is the pH of the solution.
=> Where
10
is the base of the power - it's a logarithm formula.
We can now just sub in the values and solve for [
H
+
]
.
[
H
+
]
=
10
-pH
=
10
−
(
12.83
)
=
1.479108388
×
10
−
13
We can round (if required) to
1.479
×
10
−
13
.
Thus, there are
1.479
×
10
−
13
concentration of hydrogen ions
m
o
l
L
.
Hope this helps :)
6HCl(aq) + 2A1)
-
3H2(g) + 2AlCl3(aq)
1. How many moles of hydrogen are produced from 1.20 moles of aluminum?
Answer: 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
The balanced chemical reaction is:
[tex]6HCl(aq)+2Al(s)\rightarrow 3H_2(g)+2AlCl_3(aq)[/tex]
According to stoichiometry :
2 moles of [tex]Al[/tex] produce = 3 moles of [tex]H_2[/tex]
Thus 1.20 moles of [tex]Al[/tex] will produce=[tex]\frac{3}{2}\times 1.20=1.80moles[/tex] of [tex]H_2[/tex]
Thus 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.
A chemical reaction takes place in a closed system. The mass of the reactants before the reaction was 35 grams. What must the mass of the products of the reaction be, according to the law of conservation of mass?
Doug used a magnet to move a .025kg ball. The magnet exerts a force of 5N, which causes the ball to begin moving. What is the acceleration of the ball when it begins to move?
Answer:
[tex]a=200\ m/s^2[/tex]
Explanation:
Given that,
The mass of a ball, m = 0.025kg
The force exerted by the magnet, F = 5 N
We need to find the acceleration of the ball when it begins to move. Let a be the acceleration. The net force of the ball is given by :
F = ma
Where
a is acceleration of the ball
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{5}{0.025}\\\\a=200\ m/s^2[/tex]
so, the required acceleration of the ball is [tex]200\ m/s^2[/tex].