what is the difference between test tube and boiling tube​

Answers

Answer 1

Test tubes heat small amounts of liquids while boiling tube boils liquids


Related Questions

A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force. Let us take it that the force acts on the object through the displacement. What is the work done in this case?

Answers

Answer:

56 J

Explanation:

Step 1: Given data

Force applied on the object (F): 7 NDisplacement of the object (d): 8 m

Step 2: Calculate the work (w) done on the object

We can find the work done on the object using the following expression.

w = F × d × cosθ

where

θ is the angle between F and d

Since F and d occur in the same direction, θ = 0° and cosθ = 1. Then,

w = F × d × 1

w = F × d

w = 7 N × 8 m = 56 J

Choose the catabolic reaction.
A. Breaking down a complex molecule
B. Synthesizing a complex molecule
C. CO2 and H2O combining to form carbonic acid.

Answers

Answer:

B. Synthesizing a complex molecule

Explanation:

Hello!

In this case, since catabolic reactions are related to the synthesis of complex biomolecules and metabolic reactions to the breaking down of complex molecules to obtain energy from (say start), we infer that the appropriate answer is:

B. Synthesizing a complex molecule

Because regardless C. also mentions the synthesis of a compound, carbonic acid is not a complex one in comparison to the biomolecules we produce during our cellular cycles.

Best regards!

Who has the more valued Exports?
South Africa or Egypt?
pls help ill mark brainliest! star and heart​ :)

Answers

Answer:

Egypt

Explanation:

Hi again

Egypt I’m pretty sure I’m right I’m sorry if I’m not

Which factors directly affect the magnetic force produced by an electromagnet?

O number of turns in the wire, amount of current

O amount of current, type of force

O length of core, number of turns in the wire

O amount of current, length of core

Answers

It’s o amount of current,type of force
o mount of current type of force

Which of the following is a list of the minimum amount of data needed for determining the molar enthalpy of solution of KCl(s) in pure H2O(1) ? (Assume that the KCl(aq) has the same specific heat capacity as pure water and that the initial temperatures of the KCl(s) and the water are the same.)
(A) Mass of KCl(s), initial temperature of the water, and final temperature of the solution
(B) Mass of H20, initial temperature of the water, and final temperature of the solution
(C) Mass of KCl(s), mass of H20, initial temperature of the water, and final temperature of the solution
(D) Mass of KCl(s), mass of H20, initial temperature of the water, final temperature of the solution, and atmospheric pressure

Answers

Answer:

 (C) Mass of KCl(s), mass of H20, initial temperature of the water, and final temperature of the solution

Explanation:

molar enthalpy of solution of KCl(s) is heat evolved or absorbed when one mole of KCl is dissolved in water to make pure solution . The heat evolved or absorbed can be calculated by the following relation.

Q = msΔt where m is mass of solution or water , s is specific heat and Δt is change in temperature of water .

So data required is mass of water or solution , initial and final temperature of solution , specific heat of water is known .

Now to know molar heat , we require mass of solute or KCl dissolved to know heat heat absorbed or evolved by dissolution of one mole of solute .

The correct option is option C.

To determine the molar enthalpy of the solution of [tex]Kcl(s)[/tex] is pure [tex]H_2O(l)[/tex]

We need to know that the,

grams of [tex]Kcl(s)[/tex]  grams of [tex]H_2O[/tex]  Initial temperature of [tex]H_2O[/tex]  The final temperature of the solution.  

Learn More:https://brainly.com/question/25758173

A catalyst decreases the activation energy of a particular exothermic reaction by 56 kJ/mol, to 35 kJ/mol. Assuming that the mechanism has only one step, and that the products are 78 kJ lower in energy than the reactants, sketch approximate energy-level diagrams for the catalyzed and uncatalyzed reactions. What is the activation energy for the uncatalyzed reverse reaction

Answers

Answer:

Activation energy for the uncatalyzed reverse reaction = 103 kJ/mol

Explanation:

Activation energy decreases from = 56 kj/mol to 35 kj/mol

products = 78 KJ lower in energy than reactants

Activation energy for the uncatalyzed reverse reaction = 103 kJ/mol

attached below are the sketches of approximate energy-level for both catalyzed and uncatalyzed reactions

When 70.4 g of benzamide (C7H7NO) are dissolved in 850. g of a certain mystery liquid X, the freezing point of the solution is 2.7 C lower than the freezing point of pure X. On the other hand, when 70.4 g of ammonium chloride (NH CI) are dissolved in the same mass of X, the freezing point of the solution is 9.9 °C lower than the freezing point of pure X.

Required:
Calculate the van't Hoff factor for ammonium chloride in X.

Answers

Answer:

1.62

Explanation:

From the given information:

number of moles of benzamide  [tex]=\dfrac{70.4 \ g}{121.14 \ g/mol}[/tex]

= 0.58 mole

The molality = [tex]\dfrac{mass \ of \ solute (i.e. \ benzamide )}{mass \ of \ solvent }[/tex]

[tex]= \dfrac{0.58 }{0.85 }[/tex]

= 0.6837

Using the formula:

[tex]\mathbf {dT = l \times k_f \times m}[/tex]

where;

dT = freezing point = 27

l = Van't Hoff factor = 1

kf = freezing constant of the solvent

2.7 °C = 1 × kf ×  0.6837 m

kf = 2.7 °C/ 0.6837m

kf = 3.949 °C/m

number of moles of NH4Cl = [tex]\dfrac{70.4 \ g}{53.491 \ g /mol}[/tex]

= 1.316 mol

The molality = [tex]\dfrac{1.316 \ mol}{0.85 \ kg}[/tex]

= 1.5484

Thus;

the above kf value is used in determining the  Van't Hoff factor for  NH4Cl

i.e.

9.9 = l × 3.949 × 1.5484 m

[tex]l = \dfrac{9.9}{3.949 \times 1.5484 \ m}[/tex]

l = 1.62

PLS HELLPPPP
Which of the following objects would have the greatest gravitational attraction between them if they were set 3.0 km apart?
A .20kg object and a 200kg object
A 10kg object and a 100kg object
A 30kg object and a 200,000kg object
A 400,000 kg object and a 100,000,000kg object

Answers

Answer:

A 400,000 kg object and a 100,000,000kg object

Explanation:

The objects with the most mass between them will have the greatest gravitational attraction.

This is why the last option is the right choice.

The reason for this is based on the Newton's law of universal gravitation which states that:

 "the gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them".

So, the more the mass, the greater the gravitational attraction between two bodies.

Which element in group 17 has the highest ionization energy

Answers

Answer:

fluorine

Explanation:

it has the highest electronegativity in the group and in the periodic table

To solve the ultraviolet catastrophe, Planck applied quantization to: Select the correct answer below:
A. vibrational energies of atoms
B. orbital energies of electrons
C. kinetic energies of photons
D. temperature of the system

Answers

Answer:

Vibrational energies of atoms

Explanation:

Planck applied quantization to Vibrational energies of atoms because in Black body spectrum prediction a blackbody at equilibrium is expected to radiate energies at various Frequencies ( i.e. increase in radiated energy ∝ increase in frequency ) but towards the ultraviolet region of the spectrum the energy radiated begins to drop as frequency increases. The phenomenon of drop in energy with increase in frequency is termed Ultraviolet catastrophe. hence to solve this phenomenon Planck applied quantization to Vibrational energies of atoms

Ammonium phosphate is an important ingredient in many solid fertilizers. it can be made by reacting aqueous phosphoric acid with liquid ammonia. calculate the moles of ammonium phosphate produced by the reaction of 0.085 mol of ammonia. be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.

Answers

Answer:

0.028 mole of ammonium phosphate, (NH₄)₃PO₄.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

H₃PO₄ + 3NH₃ —> (NH₄)₃PO₄

From the balanced equation above,

3 moles of NH₃ reacted to produce 1 mole of (NH₄)₃PO₄.

Finally, we shall determine the number of mole of (NH₄)₃PO₄ produced by the reaction of 0.085 mole of ammonia, NH₃. This can be obtained as follow:

From the balanced equation above,

3 moles of NH₃ reacted to produce 1 mole of (NH₄)₃PO₄.

Therefore, 0.085 mole of NH₃ will react to produce = (0.085 × 1)/3 = 0.028 mole of (NH₄)₃PO₄.

Thus, 0.028 mole of ammonium phosphate, (NH₄)₃PO₄ were obtained from the reaction.

You'll be given 100 points if you answer this question!!!!!!!!!!!!

3.
What do we call materials
that let heat pass through
them easily?
Thermal conductors
Thermal insulators
Transparent
4.
Which of these is a good
thermal conductor?
Plastic
Wood
Steel
5.
Which of these is a good
thermal insulator?
Steel
Iron
Polystyrene
6.
To save on heating bills, do
you think the roof of a
building should be lined with
a thermal conductor
a thermal insulator
nothing
7.
How does heat travel?
From cold things to hotter things
From hot things to colder things
Between things of the same temperature

Answers

Answer:conducts ,steel, polystyrene, thermal insulation

Explanation:

identified the nucleus that is found in an item that has a stable valance electron configuration

Answers

Answer:

Nucleus 3 i believe

100 POINTS FOR BEST ANSWER! What is the difference between LDOF and SDOF

Answers

An SDOF system is one whose motion is governed by a single, second-order differential equation. Only two variables, position and velocity are needed to describe the trajectory of the system. Many structures can be idealized as single degree-of-freedom systems.

The LDAP Data Interchange Format is a standard plain text data interchange format for representing LDAP directory content and update requests. LDIF conveys directory content as a set of records, one record for each object.

Bond length is the distance between the centers of two bonded atoms. On the potential energy curve, the bond length is the internuclear distance between the two atoms when the potential energy of the system reaches its lowest value. Consider that the atomic radius (sometimes called the covalent or bonding atomic radius) of an element is defined as one-half the distance between the bonded atoms in a homonuclear diatomic molecule. Actual bond lengths in molecules are determined experimentally by such methods as X-ray diffraction and microwave spectroscopy. However, these atomic radii values can be used to give an estimate of the upper limit of bond length in other (heteronuclear) molecules. Given that the atomic radii of H and Br are 37.0 pm and 115 pm , respectively, predict the upper limit of the bond length of the HBr molecule.

Answers

Answer:

152 pm

Explanation:

According to the question, we can estimate the bond length from the given values of the atomic radii. This now is the upper limit of the bond length for the molecule.

Since we have that;

Atomic radius of H= 37.0 pm

Atomic radius of Br = 115.0 pm

Bond length = Atomic radius of H + Atomic radius of Br

Bond length = 37.0 pm + 115.0 pm

Bond length = 152 pm

A certain substance X condenses at a temperature of 123.3°C . But if a 650. g sample of X's prepared with 24.6 g of urea ((NH2)2 CO) dissolved in it, the sample is found to have a condensation point of 124.3°C instead. Calculate the molal boiling point elevation constant Kb of X.

Answers

Answer:

1.6 °C.kg/mol

Explanation:

Step 1: Calculate the molality of urea

We will use the following expression.

m = mass(urea) / molar mass(urea) × kg solvent

m = 24.6 g / 60.06 g/mol × 0.650 kg

m = 0.630 mol/kg

Step 2: Calculate the boiling point elevation of X

The boiling point elevation is a colligative property that can be calculated using the following expression.

ΔTb = 124.3 °C - 123.3 °C = 1.0 °C

Step 3: Calculate the boiling point elevation constant

We will use the following expression.

ΔTb = Kb × m

Kb = ΔTb/m

Kb = 1.0 °C/(0.630 mol/kg) = 1.6 °C.kg/mol

What type of rock is limestone? Describe how a limestone rock is likely to change over a long period of time. Pls answer I will mark brainiest.

Answers

It is a sedentary rock. Limestone are usually affected by chemical weathering when rainwater (containing a weak carbonic acid) reacts with limestone. This causes the limestone to dissolve.
Question:

What type of rock is limestone? Describe how a limestone rock is likely to change over a long period of time. Pls answer I will mark brainiest.

Answer:Sedimentary Rock Limestone being a sedimentary rock would be converted to marble, a metamorphic rock if subjected to metamorphic conditions over an extensive period of time. Over a long period of time, we would take a look at the rock "limestone" through the rock cycle.

#CARRYONLEARNING #STUDYWELL

Which statement is always true about conversation of matter?
The mass of a system does not change during a chemical reaction
If a solid forms the mass of a system increases
If a gas forms the mass of a system decreases
The mass of a system changes when a substance changes from liquid to gas, but it does not change in a chemical reaction

Answers

Answer:

The mass of a system does not change during a chemical reaction

Explanation:

Correct Answers

If you have 3.5 L of He to blow up balloons... at STP...

a) How many moles of He do you have?

b) How many grams of He do you have?

Answers

Answer:

B

Explanation:

what are some sources of error associated with electroplating​

Answers

Answer:

Cold Shuts. Cold shuts are one of the most common defects found in materials sent for electroplating.

Pitting

Sharp Edges

Cleavage Points

Unclean Manufacturing

Loss of Adhesion

Cracking After Plating — Hydrogen Cracking

Dull and Hazy Deposits in Plating.

Explanation:

helppp nowwww plsssss!!

Answers

Answer:

The sun will appear to rise and set more slowly

have a nice day! (^o^)

What is the mass of 3.00 -1023 particles of water? Water has a molar mass of 18.0 g/mol.
3.00 grams
18.0 grams
6.00 grams
9.00 grams

Answers

Answer:

bro

Explanation:

guhfuyfouyvyu

Answer:

9.00

Explanation:

I took the test and got it correct ...

3. How much heat (in kl) is released when 1.65 mol NaOH(s) is dissolved in water? (The molar heat of solution of NaOH is -445.1 kJ/mol.)
a. -1.36x 10-3 kJ
b. -7.34 x 10^2 km
c. -2.69 x 10^1 km
d. -2.80 x 10^2 km

Answers

The heat released : b. -7.34 x 10² kJ

Further explanation

Given

1.65 mol NaOH

The molar heat of solution of NaOH is -445.1 kJ/mol

Required

Heat released

Solution

ΔH solution = Q : n

ΔH solution = enthalpy of solution(-=exothermic, +=endothermic)

Q = heat released/absorbed

n = moles of solute

Input the value :

Q = ΔH solution x n

Q = -445.1 kj/mol x 1.65 mol

Q = -734.415 kJ

PLEASE HELP BRAINLIEST AND 15 points.

1. Which substance is nonvolatile ?
(1.5 Points)
Substance B, boiling point of 105 °C
Substance C, boiling point of 25 °C
Substance A, boiling point of 75 °C
Substance d, boiling point of 45 °C

Answers

Answer:

Substance B, boiling point of 105 °C

Explanation:

Non volatile substances have high boiling points

Why do organisms eat food? Be sure to explain your answer. ​

Answers

Answer:

Organisms need to take food to get energy and perform life processes. A living organism undergoes many life processes like nutrition, respiration, digestion, transportation, excretion, circulation of blood, and reproduction. To perform all these life processes the organism needs energy and nutrients.

Explanation:

nnastarannnn his idea

Write a balanced chemical equation for the reaction of aqueous solutions of lead(II) nitrate and potassium iodide
to produce solid lead (II) iodi de and aqueous potassium nitrate.
Help pleaseee

Answers

Answer: Pb(NO3)2(aq) + 2KI(aq)  —> PbI2(s) + 2KNO3(aq)

Explanation:

Identify the Sun activity that travels from one sunspot to another sunspot.

Group of answer choices

Prominence

corona mass ejection

solar wind

solar flare

Answers

Answer:

solar flair I think I'm not sure

GRADE 5 SCIENCE MYA-2020-2021
Testosters are testing the choict of light on a radiometer Team 1 finds that blue light makes the radiometer spin slower when a blue light is 35 centimeters (cm) away. To validate Team 1's test results, how must
Text with and that is 20 cm away
Test what that is 45 cm away
Test with a green light that is 40 cm away
Test with the light that is 35 cm away

Answers

Answer:

Test it with a blue light that is 45 cm away.

Explanation:

Use this equation for the next question:
2NaOH + H2SO4 ® Na2SO4 + 2H20
If a reaction produces 0.75 moles Na2SO4, how many moles of NaOH were used?
0.75 moles NaOH
2 moles NaOH
.375 moles NaOH
1.5 moles NaOH

Answers

The answers is: 375 moles NaOH

A copper wire is 44.85 cm long and weighs 1.521 g. The density of copper is 8.933 g/cm3.

What is the radius of the wire in millimeters?
What is the diameter of the wire?

Answers

Answer:

i am so sorry

Explanation:

The density of copper is  If a sample 8.933 g/cm3. If copper has a volume of 12.993 cm^3. Then the mass will be 136.29 gram.

How can we calculate the mass from density and volume?

Density is defined as the mass per unit volume it means that mass present in 1 meter cube is called density. The S.I unit of density is kg/m^3 and in C.G.S it is gram/cm^3

So, In above question can understand that density, mass, and volume all are convert to each other it means that if we know any two variable then third one will be calculated easily.

Mathematically,

Formula for density will be as mentioned below:-

Density = Mass/Volume.

From above formula we can calculate mass which is as follows:-

Mass = Volume × Density.

S.I unit of mass is kilograms and C.G.S unit is gram.

So In above question

Density = 8.933 gram/cm^3

Volume = 12.993 cm^3

So from above formula

Mass = Density × volume

          = 10.49 × 12.993

          = 136.29 gram

          = 0.13629 kilogram

So Mass is equal to 136.29 gram or 0.136 kilograms.

Therefore,The density of copper is  If a sample 8.933 g/cm3. If copper has a volume of 12.993 cm^3. Then the mass will be 136.29 gram.

Learn more about density here:

https://brainly.com/question/15164682

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List three powers held only by state governments Help me please this is dew by the end of the day (I'LL MARK BRAINLIEST TO WHOEVER ANSWERS!) Write these terms in a sentence in context to World War I.NationalismMilitarismU-boat please help I'm so confused pls look at picture Manuel no fue _____ a la fiesta. I need help For the finals A B C or D This is a sign of a chemical reaction that involves the production of bubbles or fizzing DO THESE ON A PIECE OF PAPER! PLEASE HELP! QUICK!!DO ALL OF THEM!!! ILL GIVE BRAINLIEST BUT IF ITS CORRECT (IT WILL TAKE A WHILE) THEN ILL GIVE BRAINLIEST JUST HELP!How is this number read?18.73eighteen seventy-threeeighteen and seventy-three tenthseighteen and seventy-three hundredthseighteen and seventy-three thousandths I need help!!! Please!!!! 50 POINTS GUYSDeon is playing fetch with his dog with a toy that is shaped like a circle. The circumference of the toy is 12 inches.Which measurement is closest to the area of the toy in square inches?18.84 in.37.68 in.113.04 in.452.16 in. Energy from the Sun is transferred from the Earths surface to the atmosphere, resulting inatmospheric convection currents that produce winds. How do physical properties of the aircontribute to convection currents?a -The warmer air sinks because it is more dense than cooler air.b -The warmer air rises because it is more dense than cooler air.c- The warmer air sinks because it is less dense than cooler air.d -The warmer air rises because it is less dense than cooler air. Can someone rate my essay about being happy and poor rather than rich and sad?In my opinion I would rather be poor and happy. What would be the point of being rich and miserable if in the end you won't be happy. Happiness is something you make for yourself, with your heart and soul. People with money crave for happiness but no matter how much they buy they can't be happy because you can't buy happiness. For happiness I would be poor that's how important and special happiness is. That is why I would rather be poor and happy then miserable and rich. Which statement best describes the authors claim that sugar was the connection between slavery and freedom? 21+15a distributive property equavilent expression Your friend has s pennies. You have 11 pennies. You and your friend have a total big 23 pennies. Which equation can you use to find s?A.) s + 11 = 23B.) 11s = 23C.) s - 11 = 23D.) s divided by 11 = 23If correct I will mark brainlist To find the quo 2/5 divided 1/4. Performing movements that improve your muscular endurance help you ____________. ( What are two sources of phosphorous?A. stratosphereB. ErosionC. CowsD. Fossil fuelsE. Fertilizer Select all the correct tables.This table gives information on types of rooms occupied at a hotel in a day.King Bed Queen BedMountain View 25 18Ocean View 12 20Identify the tables that represent the relative frequencies of this data by rows or by columns. Round your answers to the nearest hundredth.