Answer:
The answer is 12 km/hrExplanation:
The average speed can be found by using the formula
[tex]v = \frac{d}{t} \\ [/tex]
where
d is the distance
t is the time taken
So we have
[tex]a = \frac{24}{2} \\ [/tex]
We have the final answer as
12 km/hrHope this helps you
Which of the following is a unit of density? = Mass / volume
A: liters per cubic gram
B:cubic meters
C:grams per cubic centimeter
D:square meters
Answer:
The correct answer is C.
Explanation:
To solve this problem, we should first recall possible units for mass and volume. Mass can be represented with units of grams, kilograms, etc. Volume has units of cubic meters, cubic centimeters, etc.
Therefore, since we know that density is mass divided by volume, the only answer that makes sense here is C. grams per cubic centimeter (where per signifies that grams are being divided by cubic centimeters).
Hope this helps!
Write in the name of the molecular geometry for each molecule described below.
A molecule with two atoms and no lone pairs around the central atom has a shape.
A molecule with four atoms and no lone pairs around the central atom has a shape.
A molecule that has two atoms and two lone pairs around the central atom has a shape.
A molecule that has five atoms and no lone pairs around the central atom has a shape.
Answer:
linear
tetrahedral
bent
trigonal-bipyramidal
Explanation:
i just did it one edg
Which of these statements is true about a neutral atom of chromium (Cr)? help
A.has more protons than electrons
B. has fewer subatomic particles than an atom of iron (Fe)
C.has 52 protons and 52 electrons
D.has more electrons than neutrons
Answer : The correct option is, (B) has fewer subatomic particles than an atom of iron (Fe) .
Explanation :
The given element is chromium (Cr). The atomic number of chromium is 24.
As we know that the atomic number is either equal to the number of protons or number of electrons.
So, Atomic number = Number of protons = Number of electrons = 24
And we know that mass number is the sum of number of protons and number of neutrons.
Mass number of chromium = 52
Mass number = Number of protons + Number of neutrons
52 = 28 + Number of neutrons
Number of neutrons = 28
And we know that the atomic number of iron (Fe) is 26.
Number of protons = Number of electrons = 26
Mass number of Fe = 56
Number of neutrons = 30
From the given options we conclude that the a neutral atom of chromium has fewer subatomic particles than an atom of iron (Fe).
Hence, the correct option is, (B) has fewer subatomic particles than an atom of iron (Fe) .
remical Reactions 8.P.13 1 8 of 40
Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?
O A H2 + O2 + H2O
O B. Mg + HCl + H2 + MgCl2
C. KC 103 → KCl + O2
D. H2O + CO2 + H2CO3
Answer:
H₂O + CO₂ → H₂CO₃
Option D is correct.
Law of conservation of mass:
According to this law, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
Now we will apply this law to given chemical equations:
A) H₂ + O₂ → H₂O
There are two H and two O atoms present on left side while on right side only one O and two H atoms are present so mass in not conserved. This option is incorrect.
B) Mg + HCl → H₂ + MgCl₂
In this equation one Mg, one H and one Cl atoms are present on left side of equation while on right side two H, one Mg and two chlorine atoms are present. This equation also not follow the law of conservation of mass.
C) KClO₃ → KCl + O₂
There are one K, one Cl and three O atoms are present on left side of equation while on right side one K one Cl and two oxygen atoms are present. This equation also not following the law of conservation of mass.
D) H₂O + CO₂ → H₂CO₃
There are two hydrogen, one carbon and three oxygen atoms are present on both side of equation thus, mass remain conserved. This option is correct.
If the input force applied to one end of a first-class lever is 8 N, and the fulcrum is located 6 m away from the input force but 3 m away from the output force, what will be the resulting output force?
Answer:
16 N
Explanation:
The ratio of output force to the input force is called mechanical advantage of the lever. Also, the ratio of input arm distance to the output arm distance is called mechanical advantage of the lever.
We have,
Input force = 8 N
Input arm distance = 6 m
Output arm distance = 3 m
We need to find the resulting output force. So,
[tex]\dfrac{F_o}{8}=\dfrac{6}{3}\\\\F_o=16\ N[/tex]
So, the resulting output force is 16 N.
2 horizontal and parallel lines are intersected by 2 diagonal lines to form a triangle with exterior angles. The top angle of the triangle is 47 degrees. The exterior angle created by the right side of the triangle and the top horizontal line is x degrees. The bottom left angle of the triangle is y degrees. The exterior angle of the bottom right angle is z degrees above the horizontal line and 63 degrees below. Which statements about the diagram are true? Select three options. x = 63 y = 47 z = 117 x + y = 180 x + z = 180
Answer:
x = 63
z = 117
x + z = 180
Explanation:
edg 2020
Answer:
Explanation:
c
PLEASE PLEASE HEELPPPP
Landslides happen when it rains making the ground heaver and more likeable to a landslide.
do you think pokemon is bad
Count the number of electrons in the innermost shell for helium, chlorine and potassium. How
many are there?
Answer:
Helium is 2 electrons
Chlorine is 7 electrons
Potassium is 1 electron
and also Potassium is going to give chlorine an electron and do ionic bonding because chlorine is missing one electron and potassium has only 1 electron in valence
Explanation:
Outermost shell is the outermost ring so just count black dots on there for each one
Alveolar air (a mixture of nitrogen, oxygen, and carbon dioxide) has a total pressure of 0.998 atm. If the partial pressure of oxygen gas is 0.198 atm and the partial pressure of nitrogen gas is 0.770 atm, what is the partial pressure of carbon dioxide in millimeters of mercury?
Answer:
The partial pressure of carbon dioxide is 22.8 mmHg
Explanation:
Dalton's Law is a gas law that relates the partial pressures of the gases in a mixture. This law says that the pressure of a gas mixture is equal to the sum of the partial pressures of all the gases present.
In this case:
Ptotal=Pnitrogen + Poxygen + Pcarbondioxide
You know that:
Ptotal= 0.998 atmPnitrogen= 0.770 atmPoxygen= 0.198 atmPcarbondioxide= ?Replacing:
0.998 atm=0.770 atm + 0.198 atm + Pcarbondioxide
Solving:
Pcarbondioxide= 0.998 atm - 0.770 atm - 0.198 atm
Pcarbondioxide= 0.03 atm
Now you apply the following rule of three: if 1 atm equals 760 mmHg, 0.03 atm how many mmHg equals?
[tex]Pcarbondioxide=\frac{0.03 atm*760 mmHg}{1 atm}[/tex]
Pcarbondioxide= 22.8 mmHg
The partial pressure of carbon dioxide is 22.8 mmHg
#10- ill mark brainliest and give 5 stars if its correct
Answer:
#10 for?
Explanation:
Help please 2 mins til it submits
The man who was first to see living microorganisms in his pond water was who?
Why is change good for an
ecosystem?
Answer:
it helps the area develop and help the animals adapt
Explanation:
im new so i hope this helps
Water and chemical elements move through cycles called biogeochemical cycles. Select the best way to explain biogeochemical cycles. a. When chemicals move from the atmosphere to a living organism. b. When a chemical moves from an organism to the atmosphere then back to an organism. c. When organisms move from an organism to the atmosphere then back to an organism.
Answer:
When a chemical moves from an organism to the atmosphere then back to an organism.
Explanation:
If we look at it closely, geology and chemistry play major roles in the process of movement and recycling of inorganic matter between living organisms and their environment. This has been called the biogeochemical cycle.
Biogeochemical cycles involve movement of chemical elements among the biotic and abiotic components of the environment; from atmosphere to land to sea, and from soils to plants.
A baby weighs 3.91 kg and measures 51.4 cm. Convert the baby's weight
to pounds and its length to inches
Which of the following is a characteristic of both scientific laws and
scientific theories?
A supported by much scientific evidence
B explain why something happens
C based on opinions of scientists
D describes what happens
revious
Answer:
A supported by scientific evidence
is copper metal mixed with water an:
a) element
b) compound
c) heterogeneous mixture
d) homogeneous mixture
Answer:
I believe it is c or d I'm sorry I didn't give you one but I know it is not a or b
what is 1006 in scientific notation?
Answer:
1.006 * 103
Explanation:
Add the number between 1 and 9 and add a decimal accordingly . so the answer is 1.006 multiplied by 10 raised to power 3
how long does it take for stirring and heat to dissolve in water?
Answer:
5-20 mins
Explanation:
with ozone. The following is a chemical reaction for CIO+ Bro - Cl + Br + O2 CI + O3 - CIO + O2 Br + O3 → BrO + O2 a. chlorofluorocarbons b. halons C, UV radiation d. none of the above
Answer:
B. Halons
Explanation:
State two function of blood in our
body?
Answer:
transporting oxygen and nutrients to the lungs and tissues
forming blood clots to prevent excess blood loss
carrying cells and antibodies that fight infection
Explanation:
.......(◍•ᴗ•◍).......
Sodium and Chlorine are both elements,
so the only contain one type of atom.
Is this true or false?
True
Answer:
False
Explanation:
PLEASE HELP I NEED HELP ASAP I WILL GIVE BRAINLIEST AS SOON AS POSSIBLE
Answer:
1 . 2.393e+ 9
2. ???
3. 3.25e-6
Explanation:
2393 kg = 2.393e+9 mg
43.23 g = 4.323 dam
0.325 cm = 3.25e-6 km
(Note: I'm not 100% that these are correct, but I hope this helps you tho. ^^)
In which way are sugars usually transported throughout a pine tree?
Answer:
through the tree's fibers
Explanation:
the tree's leaves produce sugar that is transported through the tree's fibers. Sap also contributes means of transportation for these sugars.
What is the quickest way to dissolve milk in water? Can milk dissolve in all
solvents? Explain your answer.
It dissolves in hot water because of the water temperature, the milk could not take it to mix in the hot water
What are the purposes of theories in science?
b. What makes a theory a “good theory”?
please help
Answer:
Scientific theories are testable and make falsifiable predictions. They describe the causes of a particular natural phenomenon and are used to explain and predict aspects of the physical universe or specific areas of inquiry (for example, electricity, chemistry, and astronomy).
A good theory in the theoretical sense is (1) consistent with empirical observations; is (2) precise, (3) parsimonious, (4) explanatorily broad, and (5) falsifiable; and (6) promotes scientific progress (among others; Table 1.1).
Rocks that originated from the liquid phase are classified as
rocks.
Answer:
igneous rocks
Explanation:
igneus rocks are sometimes considered primary rocks because they crystallize from a liquid
A rock is an (blank) of minerals.
I don't get this at all.
Please mark as Brainiest. I would be so happy!!!
Answer:
Minerals - composed of orderly arrangements of atoms. Rocks - are composed of minerals. Crystals - solid materials that have an orderly arrangement of atoms. Gems - are rare and beautiful minerals that often are cut from crystals.
If you change number of neutrons in an atom, you will also change its-
Answer:
atomic mass. You will have created an isotope.
Explanation:
