During which time interval does the substance exist as both a liquid and a solid

Answer:

The meter, symbol m, is the SI unit of length

The second, symbol s, is the SI unit of time.

m - metre

s- second

The SI base units for length is meter and time is second.

SI unit stands for international system of units.

It is defined as a metric system that is used as a measurement standard expected globally.
There are basically seven SI based quantities

Thus, the SI base units for length is meter and time is second.

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Answer:

Actually, I think that's True.

Good Luck!~

[tex]^{Brazts[/tex]

Answer: It's True

Explanation:

Due to the planets orbiting, the star is affected by the rotation of the large object (a planet) and starts to wobble from side to side because of the weight.

Answer: B.

Explanation:

CH3(CH2)3COOH, is the chemical formular for pentanoic acid and the structural formular is seen in Option B.

Answer:

polar covalent bonds

Explanation:

Phosphorus trichloride is a chemical compound of phosphorus and chlorine, having the chemical formula PCl 3. It has a trigonal pyramidal shape, owing to the lone pairs of electrons on the phosphorus atom.

Chlorine is more elctronegative than phosphorus . Phosphorus has a lone pair of electrons and every chlorine atom has three pairs of electrons . The molecule is not symmetrical as the shared electron pairs are closer to the chlorine atoms than the phosphorus atoms , the chlorine atoms are shifted towards one side of the center of the molecule , thus a net dipole effect is created. This is the reason why the molecule is polar .

Answer:

Bottle 2 shows the vinegar has a molarity of 2M acetic acid

Explanation:

2M of acetic acid has higher concentration of acetic acid as compared to other vinegar. In 2M of acetic acid is equals to 120 gram of acetic acid in 500 ml of water which is quiet higher than other concentration of acetic acid in vinegar which is 4%. So Mr. Holmes has to use 2M of acetic acid which will produced high intense eruption in the volcano and win the national science fair contest.

Answer:

Answer D

Explanation:

The Earth's system can be placed into four sub- groupings- : atmosphere, biosphere, lithosphere, and hydrosphere.

Answer:

Ocean, Land, Atmosphere, Life

Explanation:

Answer:

ultraviolet lights have shorter wavelengths and higher frequencies

Answer:

0.15M

Explanation:

NaOH + HCl -->NaCl + H2O

moles of NaOH reacted with HCl

(0.5 × 30)/1000 = 1.5 × 10^ -3

so the moles of HCl reacted with NaOH

1.5 × 10^ -3

concentration of HCl = ( 1.5 × 10^ -3)/10 ×1000

Answer:

38660.16 J

Explanation:

From the question,

Heat gained by water is given as

Q = cm(Δt)..................... Equation 1

Where c = specific heat capacity of water, m = mass of water, Δt = temperature change of water.

Given: c = 4.184 J/g.°C, m = 1320 g, Δt = 7 °C.

Substitute these values into equation 1

Q = 4.184×1320×7

Q = 38660.16 J

Hence the heat energy gained by the water is 38660.16 J

Answer:

I believe the answer is energy is released when an atom is split apart.

Explanation:

Nuclear fission is when the nucleus of an atom splits into two or more smaller nuclei. I hope I helped, please correct me if I'm wrong!

Answer:

By measuring the liquids freezing point, you will be able to know if it's pure water. if the water freezes at 32 Fahrenheit, or 0 celcius, then you know the colourless liquid is water.

Explanation:

Answer: you could drink it

Explanation:

Answer:

Living organisms do contain carbon compounds. This is true.

Explanation:

Answer :

(a) The name of gas given off in the reaction is hydrogen gas.

(b) When we take the test tube containing zinc and sulfuric acid near a candle or a burner, we hear a pop sound. This shows the presence of hydrogen gas.

(c) The products formed in this reaction are zinc sulfate and hydrogen gas.

(d) When the evolution of hydrogen gas will stop.

(e) The word equation for this reaction is:

Zinc + Sulfuric acid [tex]\rightarrow[/tex] Zinc sulfate +Hydrogen gas

Explanation:

As we know that when an acid reacts with a metal, then a salt and hydrogen gas are formed.

As per question, when sulfuric acid reacts with zinc metal then zinc sulfate and hydrogen gas are formed.

The word equation for this reaction is:

Zinc + Sulfuric acid [tex]\rightarrow[/tex] Zinc sulfate +Hydrogen gas

The balanced chemical reaction is as follows:

[tex]Zn(s)+H_2SO_4(aq)\rightarrow ZnSO_4(aq)+H_2(g)[/tex]

In this reaction, zinc metal displaces the hydrogen form sulfuric acid.

When we take the test tube containing zinc and sulfuric acid near a candle or a burner, we hear a pop sound. This shows the presence of hydrogen gas.

Answer:

D. more Reactants will form

Explanation:

hope that help.

Answer:

Dalton expressed his assumption in A Modern Model of Chemical Theory that atoms of various elements should be uniformly differentiated, based on their differing atomic weights. In doing so, he became the first scientist to explain atom behavior as regards weight measurement.

Explanation:

Answer:

Ebola is a rare but deadly virus that causes fever, body aches, and diarrhea, and sometimes bleeding inside and outside the body. As the virus spreads through the body, it damages the immune system and organs. Ultimately, it causes levels of blood-clotting cells to drop. This leads to severe, uncontrollable bleeding.

Explanation:

Ans180.158 g

Molar mass (glucose): 6×12.0011 g+12×1.00794 g+6×15.9994 g=180.158 g,1.5×10−1mol ×180.158 g/mol =27 g. 6 × 12.0011 g + 12 × 1.00794 g + 6 × 15.9994 g = 180.158 g , 1.5 × 10 − 1 mol × 180.158 g/ mol = 27 g.wer:

Explanation:

please mark this answer as brainlest

The molar concentration of the glucose solution at the end of the procedure is 0.224 M.

In the first step, we dissolve 263.1 g of glucose (molar mass=180.16 g/mol) in enough water to make 500.0 mL of solution. We can calculate the molarity of the initial solution using the following expression.

[tex]M = \frac{mass\ glucose}{molar\ mass\ glucose \times liters\ solution } = \frac{263.1 g}{180.16 g/mol \times 0.5000 L } = 2.921 M[/tex]

In the second step, we take a volume (V₁) of 19.2 mL of the 2.921 M (C₁) solution and add enough water to make 250.0 mL (V₂) of dilute solution. We can find the concentration of the dilute solution (C₂) using the dilution rule.

[tex]C_1 \times V_1 = C_2 \times V_2\\C_2 = \frac{C_1 \times V_1}{V_2} = \frac{2.921 M \times 19.2 mL}{250.0 mL} = 0.224 M[/tex]

The molar concentration of the glucose solution at the end of the procedure is 0.224 M.

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Answer:

According to the evolution theory, the organisms that are better adapted have more chances to survive and to reproduce, thereby they also have more chance to perpetuate their own genes in the next generation. This statement can be divided into three properties. First, the adaptation (or adaptive fitness) of one organism is the ability to make use of the available resources in particular environmental conditions. Second, survival is defined as the ability to identify dangerous (environmental) conditions. Finally, reproduction can be defined as the ability to leave descendants (i.e., own offspring). The most important evolutionary forces that drive this process are mutations and recombination that generate biodiversity, these forces are capable of increasing the adaptive fitness in the next generation and generating speciation.

The most important evolutionary forces that drive this process are mutations and recombination that generate biodiversity.

According to the evolution theory, the organisms that are better adapted have more chances to survive and reproduce, thereby they also have more chances to perpetuate their own genes in the next generation.

The most important evolutionary forces that drive this process are mutations and recombination that generate biodiversity, these forces are capable of increasing the adaptive fitness in the next generation and generating speciation.

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Answer:

B.Some potential energy was converted into thermal energy due to friction.

The fact that kinetic energy is not greater than potential energy is due to the fact that during motion, kinetic energy loses some of its energy as a result of heat, friction, and light energy. These losses do not occur with potential energy, which is why potential energy is always greater than kinetic energy.

The energy that an object has as a result of motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed alterations.

There is no initial potential energy since the initial velocity is zero. There is no final potential energy since the end height is zero. This indicates that the total kinetic energy and total potential energy are equal. Both parties have the ability to cancel the mass.

Due to the principle of energy conservation, the initial potential energy and the end kinetic energy will be equal just before the object strikes the ground.

Thus, kinetic energy is not greater than potential energy is due to the fact that during motion.

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Answer:

Well, I cannot see the options but if I were you I would choose the one closest to this. Rutherford's model shows that an atom is mostly empty space, with electrons orbiting a fixed, positively charged nucleus in set, predictable paths.

Explanation:

Again I cannot see the options but here is what I would guess. Hope this helped and have a great day! :-)

Answer:

The atom’s positive charge is located in the atom’s nucleus.

The atom is mostly empty space

Electrons orbit around the center of the atom.

Explanation:

Answer:

5000*C abd 1.5 million atmospheres

Answer:

The universe is expanding

Explanation:

As long as the amount of stuff doesn't go over a critical threshold, the universe will continue to expand forever, and eventually suffer heat death, freezing out. But if there's too much stuff, the expansion of the universe will slow down and stop. Then the universe will begin to contract.

HOPE IT HELPS :)

PLEASE MARK IT THE BRAINLIEST!

Answer:

The universe is expanding

Explanation:

Its expanding in many ways as in technology, mind, life it self,         its all part of a life form in the universe to create more life in earth and other places like the micro organism with the bacteria and the microscopic life form.

Answer:

Hello

The answer is 25gr H2O

Explanation:

50grH2×1 molH2/2 gr H2×2mol H2O/2molH2=25gr H2O

Answer:

The new volume is 65.1 mL.  

Explanation:

We have,

Initial volume of the gas is 100 mL

Initial temperature is 300 degrees Celsius

It is required to find the volume the gas will occupy at 100 degrees Celsius. Charles law gives the relation between volume and temperature such that,

[tex]V\propto T[/tex]

So,

[tex]\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}[/tex]

V₂ is new volume

[tex]V_2=\dfrac{V_1T_2}{T_1}[/tex]

V₁ = 100 mL

T₁ = 300 C = 573.15 K

T₂ = 100 C = 373.15 K

Plugging into formula we get :

[tex]V_2=\dfrac{100\times 373.15}{573.15}\\\\V_2=65.1\ mL[/tex]

So, the new volume is 65.1 mL.  

Answer:

magnet

Explanation:

Answer:

magnet

Explanation:

Answer:

An atom

Explanation:

An atom is the basic unit of a chemical element. Atoms are made out of three main parts: protons, neutrons and electrons.

step by step

Na(sodium)=2.8.1

Cl (Chlorine)=2.8.7. sodium will give the chlorine the 1 valence electron to become stable ions.

answer

pottasium. (2.8.8.1) and Flourine(2.7)