Answer:
58
Explanation:
mass number of iron 58 is 58
What information in a balanced chemical equation shows how many moles of a reactant are involved in the reaction?
Answer: Coefficients
Explanation: The coefficients in a balanced chemical equation tell you how many moles of reactants you'll require and how many moles of product you'll be able to make.
Answer: The coefficient in front of the molecule tells it’s relative number of moles.
Explanation: Quiz
The table below gives the numbers of protons, electrons, and neutrons in four atoms.
Atom Number of protons Number of neutrons Number of electrons
1 9 8 9
2 9 9 8
3 9 9 10
4 9 10 9
Based on the table, which atom has a charge of –1?
1
2
3
4
Answer:
3
Explanation:
i took the quiz
Answer:
Atom 3
Explanation:
The given data is as follows:
Atom number Protons Neutrons Electrons
1 9 8 9
2 9 9 8
3 9 9 10
4 9 10 9
The charge on an atom is given by the relation:
Charge = number of protons - number of electrons
For atom 1: charge = 9 - 9 = 0
Atom 2 : charge = 9-8 = 1
Atom 3: charge = 9 -10 = -1
Atom 4 : charge = 9-9 = 0
How many grams of tin would occupy 5.5 cm^3, if it had a density of 7.265 g/cm^3
Answer:
Density=Mass/Volume
7.265=M/5.5
Mass=7.265×5.5g
=39.9575g
10 cm3 of metallic cylinder has a mass of 39.35 g. The density of this cylinder is
Group of answer choices
3.935 g/cm3
39.35 g/cm3
10 g/cm3
5.935 g/cm3
Answer:3.935g/cm3
Explanation:39.35 g. /10cm3 = 3.935g/cm3
10 cm³ of metallic cylinder has a mass of 39.35 g. The density of this cylinder is 3.935 g/cm³.
Density is a measure of the amount of mass per unit volume of a substance. It is an intensive physical property, meaning that its value does not change depending on the size of the object.
Density is calculated by dividing an object’s mass by its volume.
The density of water is 1,000 kg/m³ at 4°C. The unit of density is kg/m³ (kilogram per cubic meter). The SI unit of density is kg/m³
Density = mass/volume
= 39.35 g/10 cm³
=3.935 g/cm³.
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what is kinetic energy ?
Answer:
Energy which a body possesses by virtue of being in motion.
matter can be classified as a ____ or a ____
Answer:
matter can be classified as a substance or a element
what is RbCIO2 name?
Answer:
RbCIO2 rubidium chlorite magnesium hypocarbonite.
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, RbCIO[tex]_2[/tex] is named as rubidium chlorite magnesium hypo carbonite.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
The compound that is ionic in nature can be dissociated very easily in water. Since ionic compounds are polar in nature, they readily dissolve in water. The name of the given compound is rubidium chlorite magnesium hypo carbonite.
Therefore, RbCIO[tex]_2[/tex] is named as rubidium chlorite magnesium hypo carbonite.
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b. The student leaves the beach because a hurricane warning comes in. In a
hurricane, water is warmed by the Sun. The air above the ocean is warmed by the
water and rises, causing cooler air masses to sink, resulting in wind. Describe how
heat transfer is involved in hurricanes. (3 points)
How many moles of AICI3 are produced?
Answer:Solving these equations, we see that, beginning with 6.0 grams of aluminum, 0.22 moles of AlCl3 can be formed, and that, beginning with 3.8 grams of chlorine, 0.036 moles of AlCl3 can be formed.
Explanation:
Someone please answer this ty <3
Answer: Sound
Explanation:
13. Find the total number of atoms present in the following molecules. a. 5 H₂O b. Zn Cl₂
Answer:
A= 15 atoms B= 3
Explanation:
5 x 2 + 5 x 1
3 + 2 x 1
PLS HELP ME !!!!!!!!!!
Answer
the answer is it will bubble and foam.
Explanation:
when mixed with vinegar, baking soda will foam almost like a shaken carbonated drink.
Hope that helps!!!
What mass of oxygen is needed to complete the combustion of 8.80 x 10^-3 g of methane?
Explanation:
The chemical reaction that describes the combustion of methane is
[tex]\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}[/tex]
We need to convert the mass of methane to moles:
[tex]0.00880\:\text{g} × \dfrac{1\:\text{mol CH}_4}{16.04\:\text{g}}[/tex]
[tex]= 5.49×10^{-4}\:\text{mol CH}_4[/tex]
Now use the molar ratios to determine the amount of oxygen used during the combustion:
[tex]5.49×10^{-4}\:\text{mol CH}_4×\left(\dfrac{2\:\text{mol O}_2}{1\:\text{mol CH}_4}\right)[/tex]
[tex] = 0.00110\:\text{mol O}_2[/tex]
Converting this to grams, we find that the mass of oxygen is
[tex]0.00110\:\text{mol O}_2×\left(\dfrac{15.999\:\text{g O}_2}{1\:\text{mol O}_2}\right)[/tex]
[tex] = 0.0176\:\text{g O}_2[/tex]
Which statement describes the number of protons in each atom of an element? (1 point)
A.The number of protons is given by the atomic number, which increases by one moving down in its column in
the periodic table.
B.The number of protons is given by the atomic number, which increases by one moving from left to right across
each row of the periodic table.
C.The number of protons is given by the mass number, which increases by one moving down in its column in
the periodic table.
D.The number of protons is given by the mass number, which increases by one moving from left to right across each row of the periodic table
Answer:
B.
Explanation:
The statement that describes the number of protons in each atom of an element is
B. The number of protons is given by the atomic number, which increases by one moving from left to right across each row of the periodic table.
What is an atom?An atom is the smallest divisible particle that is very small, and different substances are made up of atoms. An atom is made up of electrons, protons, and neutrons.
The elements are made up of atoms. The number of protons equals the atomic number of the element. The periodic table is organized as increasing atomic numbers from left to right.
Thus, the correct option is B, The number of protons is given by the atomic number, which increases by one moving from left to right across each row of the periodic table.
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13. Find the total number of atoms present in the following molecules.
a. 5 H₂O
b. Zn Cl₂
Answer:
A. 5H²O=23
B.ZnCL²=135
what is Planck's constant ??
Planck's constant =
6.62607004 × 10-34 m2 kg / s
Explanation:
Step by Step explanation
The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency. Wikipedia
Answer:
The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency.
Plancks constant =
6.62607004 × 10-34 m2 kg / s
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What is the mass number of fluorine (F) with ten neutrons? Such an atom has a mass of 18.998 amu
What is its mass in grams?
Explanation:
mass of Fluorine = 10proton + 10 neutron
mass = 20
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Need it in 2 minutes ASAP
Answer: read your book
Explanation: if you read it should be in there
What other methods can be used to identify the components in drugs if you didn't have melting point data
Answer:
ósea un abrazo
Explanation:
....m.......
The hydrophobic effect is the primary driving force for protein folding because: Question 4 options: a) A folded protein is able to form the most hydrogen bonds b) An unfolded protein maximizes the entropy of a biological system c) A folded protein maximizes the entropy of water
What will happen to the atoms and molecules of a substance when it undergoes a
chemical reaction?
Answer:They change
Explanation:
Be more specific the next time you ask a question :)
If the density of carbon tetrachloride is 0.893 g/mL, and a sample has a volume of 9.29 mL, what is the mass?
Answer:
8.3g
Explanation:
d=m/v
m=d*v
m=0.893*9.29
m=8.3g
If the density of carbon tetrachloride is 0.893 g/mL. The mass of the compound will be 8.3 g.
What is mass?Mass is the quantity of matter. The mass can be calculated by multiplying density with the volume. The evaluation of how close something is packed. As the mass per unit volume, it has that definition.
Volume is the space occupied by the object. The liquid that weighs heavier is denser if you weigh two liquids with similar volumes or amounts. A substance that is less dense than water will float if it is gently introduced to the water's surface.
So the formula will be d = m / v
m = d x v
The density of carbon tetrachloride is 0.893 g/m
The volume of carbon tetrachloride is 9.29 mL
What the mass is?
Putting the value in the formula
m = 0.893 x 9.29 = 8.3g
Thus, the mass of the compound will be 8.3 g.
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difference between orbit and orbital
Answer:
An orbit is a fixed path on which electrons revolve around the nucleus.
An orbital is the probable area of finding the maximum density of electrons in an atom. ..
why is mitochondria called the power house of a cell ?
Answer:
Hey mate....
Explanation:
This is ur answer....
Mitochondria are tiny organelles inside cells that are involved in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cell.
Hope it helps!
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Hehe someone help I have put down heat but I think there is another
Answer:
chemical potential enery
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Which is a component of John Dalton’s atomic theory?
The ratio of atoms in a compound can vary.
The atoms of a single element differ.
An atom is a small particle that cannot be broken down.
Atoms of different elements can be identical.
Answer:
should be D
Explanation:
Bailey swam 0.86 km, biked
for 22.4 km, and ran 4.25 km.
How many meters did she
travel total?
A: 2,751
B: 7,350
C: 21,428
D: 27,510
Answer:
2,751 Meters.
Explanation:
0.86 + 22.4 + 4.25 = 27.51 km.
Convert that to meters which gives you 2,751 meters.
2 Several scientists have adapted our model of the atom. These scientists include Democritus, Dalton, Thompson, Rutherford, Bohr, and several others. Describe why the model of the atom changed and what additional evidence would require the model to change again.
Answer:
he model of the atom changed and what additional evidence would require the model to change again.
because ;
Explanation:
This atomic model has changed over time. Scientists used the model to make predictions. Sometimes the results of their experiments were a surprise and they did not fit with the existing model. Scientists changed the model so that it could explain the new evidence.
Atomic model keep changing because the electrons around the nucleus are not fixed and they keeps rotating or changing their position in valence orbits around the nucleus. In one moment they are present on one side of the nucleus and at very next moment they will be on the other side due to their continuous rotation.
In which way are the scientific method and the design process the same?
Answer: A lot of the steps are the same.
Explanation:
Scientific Method
State your question
Do background research
Formulate your hypothesis, identify variables
Design experiment, establish procedure
Test your hypothesis by doing an experiment
Analyze your results and draw conclusions
Communicate results
Steps of The Scientific Method
Engineering Design Process
Define the problem
Do background research
Specify requirements
Create alternative solutions, choose the best one and develop it
Build a prototype
Test and redesign as necessary
Communicate results
Steps of The Engineering Design Process
For Carbon - 14, the top number will be ____. The bottom number will be ____.
