Answers
Answer:
The answer will be ：
In year 1869
Russian scientist named Dmitri Mendeleev
Chart called Mendeeleves periodic table
increasing atomic masses
physical and chemical properties.
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Related Questions
What is the temperature at 11:59 pm?
Answers
Convert 6.03 m to km using Dimensional Analysis
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Explanation:
[tex]6.03 \: m \times \frac{1 \: km}{1000 \: m} = 0.00603 \: km[/tex]
A lens is an instrument that can combine and focus light to a single point. The diagram below shows many different colors of light entering a lens and focusing on Point X. Which of the following BEST describes the effect the lens has on Point X?
Answers
Answer:
it should be the second one :)
Explanation:
what is light energy
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Answer:
Light energy is a form of electromagnetic radiation. Light consists of photons, which are produced when an object's atoms heat up.
Explanation:
Answer:
Light energy is a kind of kinetic energy with the ability to make types of light visible to human eyes. Light is defined as a form of electromagnetic radiation emitted by hot objects like lasers, bulbs, and the sun. Light contains photons which are minute packets of energy.
Explanation:
hope it's helpful for you.
H2 + Cl2 --> 2HCl
If 500 molecules of H2 react with 400 molecules of Cl2, how many of HCl will be produced?
Answers
Answer:
c20 will be there ok
Explanation:
okbbbbbbbbbbyyyyyyyy
Question 4 of 20
A student is performing experiments on a particular substance. Which
statement is an observation of a chemical property of the substance?
A. Its viscosity decreases.
B. It boils.
C. Electricity passes through it.
D. It reacts with acid.
SUBMIT
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Answer:
D
Explanation:
Reacting with acid is the only chemical property out of the 4 options. The rest are physical
True or false; When Something Heats up, it moves faster, and when something cools down, It moves slower.
Answers
Answer:
This is true
Explanation:
Even at the atomic level when an element is heated up, the atoms continue to move faster and continue colliding.
The opposite happens with the cooling of elements.
To TWO significant figures, the measurement of 0.0255 g should be reported as
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Sig Fig applies only to numbers that not zero, only except when the zero is after the the number.
For example:
0.0255 is three sigfigs
0.0050 is two sig figs
0.0005 is one sigfig
Which is true of an element?
a
It is the purest substance
b
It has different kinds of atoms
c
It is a mixture
d
The atoms always exist as single atoms
Answers
Answer:
b it has different kinds of atoms
Answer:
it has different kind of atom
Explanation:
i think
if you need 2.5 moles of of aluminum, how many atoms of aluminum is this?
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Answer:
This can be found by my multiplying number of moles with avogadro number
So we have:
2.5 × 6.022 × 10²³
= 15.055 × 10²³
Therefore there are 15.055 × 10²³ atoms in 2.5 moles of Aluminium
iron (ii) hydroxide + sodium nitrate. Name the precipitate formed in reaction
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The diagram shows movement of thermal energy
In which areas of the diagram does conduction occur?
W and X
X and Z
Y and Z
Z and W
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Answer:
Y AND Z
HOPE IT HELPS THANK ME LATER.
Answer:
B. Y and Z
Explanation:
What effect does this added energy have on the temperature, pressure, and number of collisions?
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Answer: Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.
Explanation:
how does the total mass of each object increases the amount of force that is needed to get them moving at 5 m/s increase by about 200N demonstrate newtons 2nd law
Answers
Answer:
The answer is below
Explanation:
Newton's second law of motion states that the force applied to an object is directly proportional to the rate of change of momentum with respect to time, going in the same direction as the force.
Let F = force, m = mass of object, v = velocity of object, mv = momentum.
F = d/dt(mv) = m(dv / dt) = ma; a = acceleration.
Let us assume that the object starts from rest to 5 m/s within 1 seconds, hence:
F = m(dv / dt)
200 N = m[(5 m/s - 0 m/s) / (1 s)]
200 = 5m
m = 40 kg
I need help with this question ASAP
Answers
Answer:
I think its A)
Explanation: im not sure im sorry
Which phrases describe the oceans? Check all that apply.
cover more than 70 percent of Earth
provide oxygen for life on Earth
contain fresh water
constantly in motion
interact with other Earth systemsWhich was found to be unconstitutional based on the Supreme Court’s ruling in Scott v. Sandford?
Answers
Answer:
the first one is the answer
Answer:
Phrases that describe the oceans are
cover more than 70 percent of Earth
constantly in motion
interact with other Earth systems
Explanation:
What are the two most important properties of ocean water?
Two of the most important characteristics of ocean water are its temperature and salinity.
Chlorine reacts very violently. What about its electron shells makes this the case?
Answers
Answer:
it readily gains another electron. the outer electron shell is closer to the nucleus, than iodine for example, which makes it less shielded (greater attraction for another electron = violent reaction to get it)
Explanation:
he distance from Earth to the North Star is about 430 light-years. Which of the following statements describes why scientists use the light-year unit to measure distances in space?
A light-year unit is very small and distances in space are very small.
A light-year unit is very small and distances in space are very large.
A light-year unit is very large and distances in space are very small.
A light-year unit is very large and distances in space are very large.
Answers
Answer:
D
Explanation:
because the rest don’t make any sense
A light-year unit is very large and distances in space are very large. Therefore, the correct option is option D.
What is distance?No matter the direction of the journey, distance is the overall path that an item in motion has traveled. Since just the length of the path travelled is calculated as well as the motion's direction is ignored, distance is referred to as a scalar number. The distance can only ever be positive; it can never be 0 or negative.
Displacement generally defined as the overall alteration of an object's location and motion direction. Displacement is recognized as a vector quantity since it takes into consideration both the directions of the motion and the amount of the changing position. Displacement may be zero, positive, or negative. A light-year unit is very large and distances in space are very large.
Therefore, the correct option is option D.
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describe nucleus of atom
Answers
Answer:
the nucleus is made up of protons and neutrons
What is the volume, in liters, of a 0.2 M solution containing 8.5 grams of AgNO3?
Answers
Answer:
0.25L or 250Ml
Explanation:
I am not that good but as far as my calculations this must be the answer
which form of molecular motion do liquids experience?
A translation,rotational,& vibrational
B vibrational and rotational
C translational and rotational
D transitional only
Answers
Answer:
I'm pretty sure that liquid moves by vibration
Explanation:
I asked my cousin
What is the random movement and mixing of particles?
9 letters in the world the second one is “i” and the 6th “s”
Answers
Answer:
diffusion
Explanation:
Diffusion can be defined as the net movement of particles from a high concentration to a low concentration. This sounds like the most plausible word in this case.
The name for a mixture in which all samples are made up of the same
proportions of matter is:
Answers
Answer: homogeneous mixture
Explanation:
meantion the two groups of mineralsalts and their two examples (each)
Answers
Answer:
sodium example salt and soy sauce
potassium example meat milk fresh fruits
5. What is the mass of 5.502 mol CaCl,?
Answers
Answer:
415.401g
Explanation:
1 mol of CaCl = 75.5g
5.502mol of CaCl = xg
so 5.502 × 75.5 = 415.401g
What is the formula for copper(I) phosphate(v)
Answers
Answer:
Cu3PO4
Explanation:
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, Cu[tex]_3[/tex]PO[tex]_4[/tex] is the formula for copper(I) phosphate(v).
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. Cu[tex]_3[/tex]PO[tex]_4[/tex] is the formula for copper(I) phosphate(v). Cu[tex]_3[/tex]PO[tex]_4[/tex] is an ionic compound with cation Cu⁺¹ and anion as PO₄³⁻.
Therefore, Cu[tex]_3[/tex]PO[tex]_4[/tex] is the formula for copper(I) phosphate(v).
To learn more about chemical compound, here:
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The planets in the solar system revolve around the Sun because the Sun is
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Answer: Anyway, the basic reason why the planets revolve around, or orbit, the Sun, is that the gravity of the Sun keeps them in their orbits. ... If the Sun weren't there, the Earth would travel in a straight line. But the gravity of the Sun alters its course, causing it to travel around the Sun, in a shape very near to a circle
In general, what causes a sea breeze?
O
A. The difference in density between land and water
B. The difference in cloud cover between land and water
Ο Ο Ο
C. The difference in specific heat capacity between land and water
D. The difference in elevation between land and water
Answers
Answer:
The usual cause of sea breeze is the difference in specific heat capacity between land and water Land heats and cools more quickly than water. What is the cause of a sea breeze? The air over the land is warmed and rises, to a greater temperature than that over the sea.
Explanation:
Your answer is C ! <3
The difference in specific heat capacity between land and water is the cause of sea breeze.
What is sea breeze?land and ocean heat up at different rates, sea breezes often occur during hot, summer days. The land surface warms up more quickly than the water surface during the day. As a result, the air above land is warmer than that over water.
Just to refresh your memory, warmer air is lighter than cooler air. Warm air rises as a result. As a result, the warmer air above the ground is rising. The cooler air above the water is moving across the surface of the land to replace the rising heated air as it rises over the land.
This is the sea breeze, which is seen at the top of the next picture. The land breeze that happens is seen at the bottom of the following picture.
Therefore, The difference in specific heat capacity between land and water is the cause of sea breeze.
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What is the mass of a liquid that has a density of 124 g/mL and takes up a volume of 18 mL. What mass should the liquid have? (round you answer to the nearest hundredth)
Answers
I need help with this question ASAP
