Answer:
Explanation:
Most periodic tables have a staircase thick line on their right side. This line separates the metals from the non metals.
O (oxygen) and N (nitrogen) are on the right side of the staircase.
Fe is on the left.
Those elements on the right side of the staircase are non metals.
Those elements on the left of the staircase are metals, so Fe is a metal.
what is the technique for measuring the heat change for a reaction called?
Answer: calorimetry
Explanation: calorimetry: the measure of the amount of heat involved in a chemical or physical process.
Are two atoms of same element identical
Answer:
No. Two atoms of the same chemical element are typically not identical. Since the states of the electrons in an atom are what determine the nature of the chemical bonding that the atom experiences, two atoms of the same element can react differently if they are in different states.
Answer: No
Explanation: Two atoms of the same chemical element are typically not identical. First of all, there is a range of possible states that the electrons of an atom can occupy. Two atoms of the same element can be different if their electrons are in different states.
An atom has 7 protons, 8 electrons, and 7 neutrons. What is the charge of the
atom and what type of ion is it?
Answer: An atom containing 7 protons, 8 neutrons, and 7 electrons is charge-neutral.
Explanation:
An atom is composed of protons (positively charged), neutrons (no charge) and electrons (negatively charged). The excess or defect of electrons in relation to protons determines the charge of an atom.
The atom described is an anion with -1 charge as it has one extra electron than protons.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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a caterpillar travels across the length of a 3.00 m porch in 10.5 minutes. what is the average velocity of the caterpillar in m/s?
Answer:
3.5 meters per second
Explanation:
10.5 divided by 3 equals 3.5
a sample of gold has a mass of 96.5 g and a volume of 5.00 cm3. the density of gold is
Answer:
19.3 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 96.5 g
volume = 5 cm³
We have
[tex]density = \frac{96.5}{5} \\ = 19.3[/tex]
We have the final answer as
19.3 g/cm³Hope this helps you
Which of the following is an intensive physical property?
(A) color
B) volume
C)
length
D)
mass
Color is an example of an intensive physical property. Details about intensive physical property can be found below.
What is intensive property?Intensive properties are physical properties that does not depend on the mass of the substance or system.
Another property of substances is the extensive property, which is the property that is dependent on the quantity of the substance.
Examples of intensive physical properties are as follows:
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The colour observed hrainbow during on the lower side of a a sunny rainy day is
Answer:
..
Explanation:
PLZ HELP
Observe: To model how hydrogen and oxygen react to make water, type “H2+O2” into the Reactants box and “H2O” into the Products box.
As the equation is written, which element is not in balance? ________________________
Explain: __________
Answer:
Observe: To model how hydrogen and oxygen react to make water, type “H2+O2” into the Reactants box and “H2O” into the Products box.
As the equation is written, which element is not in balanced?
oxygen isn't balanced...
Explanation:
in reactants there is 2hydrogens and 2 oxygen
but in product there is balanced no if hydrogen bt there is only one no of oxygen
Please help!! Need asap due at 11:59
There are more than 118 naturally occurring elements.Seventy five percent of the universe is Carbon .The earths's crust and human body are made of different elements.But Carbon is an element which is abundant in both.Most objects are made of Carbon with approximately one million Compounds known and over being developed and discovered every year.
A dump truck, a sports car, and a bicycle are traveling at the same velocity. Which is true?
A The bicycle has the least kinetic energy.
B More information is needed to compare their kinetic energy.
C They all have the same kinetic energy.
D The sports car has the most kinetic energy.
Answer:
a
Explanation:
The object with greater mass is having greater kinetic energy. Here, all the objects has the same velocity therefore, the bicycle is having least kinetic energy.
What is kinetic energy?Kinetic energy is a form of energy generated by virtue of the motion of the object. The kinetic energy is related to the mass and velocity of the body by the expression below:
KE = 1/2 mv².
As per this equation, kinetic energy increases with an increase in mass or/ and velocity. The substance with greater mass is possessing the greater kinetic energy.
A dump truck has greater mass than a car and bicycle. Thus, at the same velocity for all, the greater kinetic energy is for the truck and the least kinetic energy is for the bicycle having the least mass here. Thus, option A is true.
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The opposite of an endothermic reaction is a(n) reaction.
Answer:
The opposite of an endothermic process is an exothermic process, one that releases or "gives out" energy, usually in the form of heat and sometimes as electrical energy.
Explanation:
Hope this helps you. Have a nice day. Please mark as brainliest. It helps a lot. ^_^
why is polystyrene soluble in acetone and not water
Polystyrene and acetone are not soluble in water because they are non-polar substances.
A polar substance is a substance that has opposite charges on two ends of the molecule. In polar molecules, a dipole moment exists in the molecule and accounts for its interaction with water.
Water is a polar solvent. It can only dissolve polar molecules. Since polystyrene and acetone are both non-polar substances, polystyrene dissolves in acetone and not in water.
This agrees with the principle in chemistry that like dissolves like.
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The equation c = 2.95 g show how much it costs to buy gas at a gas station on a certain day. n the equation c represents the cost in dollars and g represents how many gallons of gas were purchased.
Write down at least four (gallons of gas cost) pairs that fit this relationship.
Hydrogen and oxygen react to form water true or false
Answer:
false
Explanation:
they dont spontaneoulsy form water
. Which situation will result in lower average kinetic energy? a) 100 people go swimming into a NYC public pool b) 100 people go swimming at Coney Island beach
Answer:
I think it would be the beach because all the waves and such but in a pool with more people there is a tight space so they cant move around as much and as freely. But this could be a trickster question but I would choose the beach.
Hope this is right :)
What is photosynthesis?
Answer:
when the sun's light hits a living thing
When you use a simple machine to do work, ________.
A
distance increases and force decreases
B
distance and force both increase
C
distance and force both decrease
D
distance decreases and force increases
Answer:
distance decreases and force increases
Explanation:
Simple machine means less power Hence it will require more force.Hence distance will decrease with respect to force and force will decreaseWhen we use a simple machine to do work, the distance decreases, the force increases. Hence, option D is correct. Because, these parameters are in inverse proportion.
What is force?Force is an external agent acting on a body to change its motion. There are various kinds of force such as frictional force, magnetic force, gravitational force etc.
Work done is the effectiveness of the machine to use the force to make the maximum displacement. Work done is the product of force and distance.
W = F.ds
As per this relation, the force acting on large distance makes greater work done. However,
F = W/ds.
Hence, as the distance increases, the force is decreasing. Therefore, option D is correct.
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a liquid can be described as a form of matter that
Answer:
That has no fixed shape but it have fixed volume.
Which of the three objects has the greatest density? Why? (GOLD BARS/GOLD COINS/GOLD CHAIN)
Answer:
They all have the same density
Explanation:
Density is an intensive physical property, meaning that as long as the chemical formula is the same, that specific intensive physical property will be the same. For example. One kilogram of feathers has the same mass as one kilogram of bricks. Why? They both have a mass of one kilogram.
It's the same thing here. Since all the objects are (assumed to be) made up of 100% gold, they would all have the same density regardless of the mass. For extra points, say the density of each object is [tex]19 \frac{g}{cm^3}[/tex].
Answerthey all have the same density Explanation:
before making a covalent bond, where do the atom's electrons spend most of their time?
Answer:
Before bonding, the atom's electrons spend most of their time around the nuclei of each atom. Once bonded, the electrons spend most of their time between the two nuclei
at the end of the isomerization reaction, what chemical is used to quench the residual bromine?
Answer:
They are constitutional isomers and diastereomers.
2. Describe the difference between:
(a) a group and a period
Answer:
A group is a vertical row on the periodic table and a period is a horizontal row on the periodic table.
Explanation:
Answer:
A group on the periodic table refers to the vertical arrangement of the elements while a period refers to the horizontal rows of elements
household substances that contains acid
Answer:
milk, lemon juice, toothpaste and baking soda
20
. If the number of neutrons in the nucleus of the atom is 30, and the atomic number is 40, what is the mass number of that atom?
Answer:
70
Explanation:
The atomic number stands for the number of protons.
mass number stands for number of neutrons and protons.
30 neutrons + 40 protons = mass number of 70
Hope this helps!
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4. Evaluate: Look at the results of your experiment. What was the relationship between crumple zone rigidity, crumple zone deformation, and maximum force on the dummy?
Answer:
Explanation:
Start by restating the question.
So how is the crumple zone rigidity, crumple zone deformation , and the maximum force of the dummy similar, and how are they different?
The crumple zone increases, the crumple zone deformation increases then decreases then repeated in increasing and decreasing , and the maximum force decreases. Hope that helps!
Can two different substances have the same percent composition by mass?
Answer:
Although the terms mass percent and percent composition are used interchangeably, they are different terms. The mass percent refers to the percentage of a component in a mixture, while the percent composition refers to the percentage of a particular chemical element in a mixture.
Explanation:
Hope this helps...
Copper has two naturally occurring isotopes: Cu-63 with mass 62.9395 amu and a natural abundance of 69.17% and Cu-65 with mass 64.9278 amu and a natural abundance of 30.83%. Calculate the atomic mass of copper.
Answer
63.55
Explanation:
63
C
u
has
69.2
%
abundance.
65
C
u
has
30.8
%
abundance.
So, the weighted average is
62.93
×
69.2
%
+
64.93
×
30.8
%
How is the bond between carbon and hydrogen in methane DIFFERENT from the bond
between potassium and hydrogen in potassium hydride?
Answer:
How is the bond between carbon and hydrogen in methane DIFFERENT from the bond
Explanation:
how many grams are contained in 3.4 moles of potassium
Answer:
The answer is 0.025576559594663
In San Diego (elevation 15 feet), you
step on a scale and weigh 115
pounds, using the same scale in
Denver, Colorado (elevation 5,280
feet) you would weigh
A. more than in San Diego
B. less than in San Diego
C. the same as in San Diego
Answer: b
Explanation:
It will weigh less than in San Diego. So, the correct option is (B).
What is Elevation?The elevation of a geographic location is defined as its height above or below a fixed reference point known as a geoid which is a mathematical model of the Earth's sea level as an equipotential gravitational surface.
Height is defined as the vertical distance of a point on a horizontal surface while Elevation is the height of a point above (or below) sea level.
As the Elevation is higher, the weight will be less, whereas if the Elevation is less, then the weight will be more. For example, the elevation in San Diego is 15 feet, so the weight is 115 pounds, while the elevation in Denver, Colorado, is 5,280 feet, so the weight would be less than 115 pounds.
Thus, it will weigh less than in San Diego. So, the correct option is (B).
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