Answer:
what is the question????
3 examples of substance that are soluble in water?
Answer:
salt, rocks, blah
Explanation:
Answer:
We call substances that dissolve in water soluble. Sugar and salt are examples of soluble substances. You'll need Transparent containers – test tubes or beakers. Water ( warm and cold ) Substances to try to dissolve eg. sugar, coffee, pepper, sand, flour, salt.Explanation:
Hope this helpsA student was performing a series of experiments to verify the density of a liquid. The table shows the results of four experiments. Which of these statements is correct?
Experiment No. Density (g/cc)
1 0.70
2 0.81
3 0.80
4 0.81
A) The mean of the data is 0.7.
B) The mean of the data is 0.8.
C) The median of the data is 0.70.
D) The median of the data is 0.81.
Answer:
0.8
Explanation:
since when you add them up you get 3.12 and divide it you get 0.78. Round and you will get 0.8
only question 5 plz i’m times
Answer: plasma I think
Explanation:
how many significant figures in 368.1371 ?
help me with example 2 please
Answer:
you need to calculate it by percentage
Answer:
mass = 20g
volume = 80ml =0.08 dm³
[tex]p = \frac{mass}{volume} [/tex]
[tex]p = \frac{20g}{0.08 \:dm ^{3} } \\ p = 250gdm {}^{ - 3} [/tex]
5. Complete and balance an equation for each reaction:
CaI₂ + Hg(NO₃)₂ ---------> (HgI₂ precipitates)
Al + Cl₂ --------->
Ag + HCl ------->
C₂H₂ + O₂ ------->
MgCl₂ --------->
CaI₂ + Hg(NO₃)₂ --------->HgI₂ + Ca(NO3)2
2Al + 3Cl₂ --------->2AlCl3
Ag + HCl ------->AgCl + H2
C2H2 + 5O2 --------> 4CO2 + 2H2O
MgCl₂ --------->Mg + Cl2
someone please pleaseeee help me
Perform the following mathematical operation, and report the answer to the correct number of significant figures.
1.987/3.46 =
Answer:
I don't know sorry, you could use a calculator
Explanation:
i don't know
Please help it’s due today. I will give brainliest.
Answer:
both conserve mass
Explanation:
Answer:
B.both conserve mass.
What word is used to describe the electrodes used in electrolysis that do not react?
Answer:
Electrodes are the rods that carry the electric current to and from the electrolyte. These rods are usually inert, as in they do not react- usually graphite or platinum. The positive electrode is called the anode and the negative electrode is called the cathode.
Explanation:
plz mark me as brainiest
Electrodes in electrolysis that do not react are called inert electrodes.
Electrodes are conductors which carry current in and out of the electrolyte.
The negative electrode is the anode and the positive electrode is the cathode.
Inert electrodes do not react.
Electrodes in electrolysis that do not react are called inert electrodes.
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ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
Sulfur has an atomic number of 16.
What is the electron configuration for an electronically neutral atom of sulfur?
Use an aufbau diagram.
1s22s22p63s23p3
1s22s22p63s23p5
1s22s22p63s23p6
1s22s22p63s23p4
Answer:
1s^2 2s^2 2p^6 3s^2 3p^4
Explanation:
i has picture here of correctness.
Which pattern(s) may be observed from the arrangement of elements in the periodic table? Select all that apply.
A. increasing number of protons
B. similarity in the number of their valence electrons
C. similarity in their physical and chemical properties
D. increasing relative abundance on Earth's surface
Answer:
A, B, C.
Explanation:
The periodic table exemplifies the number of protons for each element, the number of valence electrons for each element, and depending on the specifications and the complications of the periodic table (in other words the higher quality of a periodic table) will also commend upon you physical and chemical properties of each element and each group of which they belong to. Hopefully this helps.
The pattern(s) may be observed from the arrangement of elements in the periodic table -
A. increasing number of protonsB. similarity in the number of their valence electronsC. similarity in their physical and chemical propertiesThe periodic table has various types of patterns in their arrangement of elements.
As you move to the right, the atomic number increases, meaning the number of protons increases.The number of valence electrons decreases from left to right across each period.The number of valence electrons increases from top to bottom within each groupEach element within a group has similar physical or chemical properties because of its atom's outermost electron shellThus, the correct choices are - A, B, and C.
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The sun's energy influences climate in different ways. For example, the latitudes at the equator receive more intense energy from the sun and therefore have warmer temperatures. How does the sun's energy MOST DIRECTLY influence precipitation in an area?
Answer:
The Sun's energy is transferred as both light and heat energy, that raises the temperature of an area receiving the Sunlight. The increased temperature results in the evaporation of water from surfaces and water bodies, such that the mass of water vapor rises up into the atmosphere and condenses when it gets away from the ground heat to the cooler and higher altitudes
When there is a situation of low pressure, the wind blows into the low pressure, where, in the equator, comprises of high temperature air which could contain considerable amount of vapor from the neighboring water bodies, resulting in the eventual rise of very moist air, up into the atmosphere, that condenses at low temperature at the high altitudes, accumulate into larger masses of liquid water, and fall as rain
Explanation:
Which postulate of Dalton’s atomic theory has not been disproved by further investigation?
A. All matter is made of tiny particles called atoms.
B. Atoms are indivisible and indestructible.
C. All atoms of a given element have the same mass.
D. Atoms of an element are all identical.
Answer:
The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons...
hope this helps u
The Daltons atomic model gave the theory of chemical combination and the law of conservation of atoms. All matter is made of atoms is not disapproved. Thus, option A is correct.
What was Dalton’s atomic theory?Dalton’s atomic theory was given by John Dalton and involved several main points. According to the theory that matter has been composed of tiny atoms that are indestructible and indivisible.
It also stated about the mass, as atoms of various elements have different masses and the properties are shared by the atoms of the same element only. It gave rise to the law of conservation of mass, definite, and multiple proportions.
One of the laws is about matter being made of tiny particles called atoms. It has been not disproved by further investigation in any of the atomic models and theories.
Therefore, option A. the matter is made of atoms is not disproved.
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Fluorine(F), Chlorine(Cl), Bromine(Br), and Lodine(I) are elements in the same group on the periodic table. Why are these elements grouped together?
A. They all have similar properties
B. They all have similar atomic masses
C. They all have the same atomic radius
D. They all have the name number of protons
Answer:
The answer is A
Explanation:
My teacher gave me the answer before the test that we took on 11/12/2020
Hope this helps anyone else who has the same question.
The halogens have similar properties, the correct option is A.
What are Halogens?Halogens are the group 17th compound of the periodic table, It consists of elements like Fluorine(F), Chlorine(Cl), Bromine(Br), and Lodine(I).
The halogens have the following properties.
They all react with hydrogen to create acids.
All of them are fairly harmful.
Salts are easily formed when they react with metals.
Their outer shell contains seven valence electrons.
They are electronegative and very reactive.
Low melting and boiling points characterize the halogens. This is a common characteristic of non-metals.
As you move lower in the group, the melting and boiling points then rise.
The elements have different atomic mass, atomic radius, and a different number of protons.
They are grouped together because they all have similar properties.
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What two positions would the moon be when we have the lowest tidal range?
Answer:
Quarter and half moons
Explanation:
Which of the following substances would have a fixed shape and volume at room temperature?
Group of answer choices
aluminum (solid)
rubbing alcohol (liquid)
lemonade (liquid)
helium (gas)
Answer:
aluminum (solid)
Explanation:
Solids have fixed shape and volume at room temperature.
Matter is defined as any substance that has weight and occupies space. There are three main classes of matter;
SolidLiquidGasSolids are particles have strong attractive force between them. This confers a fixed shape and volume on them.
Liquids are mostly fluids that takes up the shape of containers they occupy. The have intermediate strength of attractive forces.
Gases have weak forces and do not have fixed shape or volume. They take up the shape of any container they are introduced into.
Joyce poured 200 milliliters (mL) of water into a beaker, placed a thermometer in it, and heated it until it started to boil. She recorded a temperature of 100 degrees Celsius (°C) when it started to boil. She repeated the process with 400 mL of water. What would be the temperature when this second sample started to boil?
Answer:
473 °C
Explanation:
The following data were obtained from the question:
Initial volume (V1) = 200 mL
Initial temperature (T1) = 100 °C
Final volume (V2) = 400 mL
Final temperature (T2) =..?
Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:
T(K) = T (°C) + 273
Initial temperature (T1) = 100 °C
Initial temperature (T1) = 100 °C + 273 = 373 K
Next, we shall determine the final temperature of the water as follow:
Initial volume (V1) = 200 mL
Initial temperature (T1) = 373 K
Final volume (V2) = 400 mL
Final temperature (T2) =..?
V1/T1 = V2/T2
200/373 = 400/T2
Cross multiply
200 × T2 = 373 × 400
200 × T2 = 149200
Divide both side by 200
T2 = 149200/200
T2 = 746 K
Finally, we shall convert 746 K to celsius temperature. This is illustrated below:
T(°C) = T(K) – 273
T(K) = 746 K
T(°C) = 746 – 273
T(°C) = 473 °C
Therefore, the temperature of the second sample when it starts to boil is 473 °C
No, since the slopes are different.
Yes, since the slopes are the same and the y-intercepts are the same.
Yes, since the slopes are the same and the y-intercepts are different.
No, since the y-intercepts are different.
Option C, slopes are same but y intercepts are different is the correct answer
what dose pH mean on the periodic table
I’m stuckkkkkk please help
Answer:
A
Explanation:
I think...........maybe
i neeeed helllpppsss
Answer:
Kg / m ^3. options no 2OR Kilograms per cubic metre is the corret answer
It helps you......
. Thank you ☺️☺️
GIVING BRAINLIEST TO WHOEVER ANSWERS THIS!!
What is the density of rod D, in g/cm3 ? Mass is 15 grams and volume is 14 cm3.
A: 2.5 g/cm3
B: 1.4 g/cm3
C: 1.1 g/cm3
D: 0.94 g/cm3
Answer:
The answer is option CExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{15}{14} \\ =1.0714285 ...[/tex]
We have the final answer as
1.1 g/cm³Hope this helps you
An object accelerates 4.0 m/s2 when a force of 10 newtons is applied to it. What is the mass of the object
Answer:
The answer is 2.5 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
where
f is the force
a is the acceleration
We have
[tex]m = \frac{10}{4} = \frac{5}{2} \\ [/tex]
We have the final answer as
2.5 kgHope this helps you
A rock has a density of 2.2 g/cm3 and a volume of 66.5 mL. How much mass does the rock have?
Given parameters:
Density of the rock = 2.2g/cm³
Volume of rock = 66.5mL
Unknown:
Mass of the rock = ?
Solution:
Density is the mass per unit volume of a body. It is mathematically expressed as shown below;
Density = [tex]\frac{mass}{volume}[/tex]
So;
Mass = Density x Volume
We need to take the given parameters to the same unit before we solve;
convert mL to cm³
1mL = 1cm³; 66.5mL is the same as 66.5cm³
Now solve;
Mass = 2.2 x 66.5 = 146.3g
The mass of the rock is 146.3g
daniel has a sample of pure copper. its mass is 89.6 grams and its volume is 10 cubic centimeters whats the density of the sample
Answer:
The answer is 8.96 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{89.6}{10} \\ [/tex]
We have the final answer as
8.96 g/cm³Hope this helps you
The bowling ball weighs 3.6 kg and the bowling pin weighs 1.36 kg. If the mass of the bowling ball is increased to 7.2 kg and the bowling pin is increased to 2.7 kg, what is the effect on the force between them? Group of answer choices
Answer:
F₂ = 3.97 F₁
Hence, the force will be increased by a factor of 3.97
Explanation:
The force between the ball and the bowling pin is given by Newton's Gravitational Law, as follows:
F = Gm₁m₂/r²
where,
F = Force
G = Gravitational Constant
m₁ = mass of ball
m₂ = mass of bowling pin
r = distance between ball and bowling pin
So, initially:
F₁ = G(3.6 kg)(1.36 kg)/r²
F₁ = 4.896 G/r²
After increase in masses:
F₂ = G(7.2 kg)(2.7 kg)/r²
F₂ = 19.44 G/r²
F₂/F₁ = (19.44 Gr²)/(4.896 G/r²)
F₂ = 3.97 F₁
Hence, the force will be increased by a factor of 3.97
3
Which of the following does not affect the gravitational force
between the earth and the sun
A
The mass of the earth
B
The mass of the sun
с
The distance between the earth and the sun
D
The net electrical charge of the earth
Answer:
D. The net electrical charge of the Earth.
Explanation:
I remember from middle school. The other three options affect the gravitational force.
The gravitational force between the earth and the sun is dependent on the mass of these two objects as well as the distance between the earth and the sun. Thus, option D is the correct answer.
Why is gravitational pull important?Gravitational pull is referred as a force of attraction beared by the planetary objects. Gravity is responsible for the revolution of planets around the sun in their fixed orbits.
Gravitational pull is important as it keeps the earth revolving around the sun from a safe distance. It holds the earth in position and thus supports the life on earth. Gravity is responsible for optimum atmosphere on earth.
The formation of celestial bodies is also under the influence of gravitational pull. Gravitational force thus is consired as a fundamental force that govers all the celestial bodies.
Gravitational pull is therefore important for the life on earth.
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Which factors are needed for organisms to live earth
Answer: sunlight, water, air, habitat, and food.
Explanation: we are all living organisms and we all have our five basic necessities for survival; sunlight, water, air, habitat, and food.
How might it be possible for a substance to go directly from a solid to a gas without being liquid in between
It is possible for a substance to go directly from solid to gaseous state due to sublimation.
What is sublimation?Sublimation is defined as a process in which transition of a substance takes place from solid to gas phase without passing through the intermediate liquid phase.
It is an endothermic process which occurs at temperatures and pressure below the triple point. Reverse process of sublimation is deposition in which substances in gaseous phase directly go into solid phase.
It only refers to the change in state and not for describing transformation of substances. Sublimation requires an additional amount of energy and is an endothermic change proceeding with absorption of energy.
The enthalpy of sublimation is calculated by adding enthalpy of fusion and enthalpy of vaporization.
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Which of the following is an example of a compound?
Ο Α.
water
O B.
carbon
O C.i
iron
O D.
copper
Answer:
A. water H2O, everything else is a single element C,Fe&Cu
Explanation:
