Can someone pls help I need this quick
Zinc has been added to dilute sulphuric acid. The two react together and a gas bubble forms. The gas that forms is hydrogen. Prove why the gas is hydrogen.

Answers

Answer 1

Answer:

Here's your answer

Explanation:

When we insert a burning matchstick near the mouth of gas jar the matchstick burns with a pop sound and produces a blue flame. This proves that the gas collected is hydrogen.

hope it helps


Related Questions

What would happen to the entropy in the reaction 203(9) ► 302(9)?
A. It is impossible to tell.
B. It stays the same.
C. It decreases.
D. It increases.

Answers

D. It increases.

bez number of particles in reaction increases so randomness or entropy increase.

as entropy is the degree of randomness of particles in a system

What are the coefficients for the following equation when it is balanced?
CaF2 (aq)
KOH(aq) →
Ca(OH)2 (s)
KF (aq)

Answers

1, 2, 1, 2, in that order.

Explain what will happen to the crystal when cations are pushed they face each other and the movement is simulating an applied force

Answers

Answer:

When an ionic crystal breaks, it tends to do so along smooth planes because ... ions are forced near each other and the repulsive force causes the crystal to shatter. ... Cations move to one electrode, while anions move to the other, ... Diagram of ions in an ionic solution when an electrical current is applied.

Explanation:

Hope this helped

Select the atoms that are likely to gain electrons to form anions:
A. Cesium (Cs)
B. Chlorine (CI)
c. Nitrogen (N)
D. Sulfur (S)
hurryyy asap make u the brainlyeist

Answers

Answer:

c

Explanation:

The atom of element has 25 electrons and 30 neutrons write down its atomic number and mass number.​

Answers

Answer:

Atomic number = 25 protons

Mass number = ( 25 + 30 ) = 55

atomic-24
mass-55 hope this helps

Please help please help

Answers

Answer:

sry I don't know much about chemistry

Its 60.7% because the total mass of NaCl is 58.5g and chlorine only costitute of the 35.5g. So its mas of chlorine over total mass x 100

Calculate the percentage of water of crystallisation in MgSO⁴ 7H²O

Answers

Answer:

Formula of EPSOM salt = MgSO4.7H2O

molecular mass of MgSO4.7H2O = atomic mass of Mg + atomic mass of S + 4 × atomic mass of O + 7 { 2 × atomic mass of H + atomic mass of O }

= 24 + 32 + 4× 16 + 7{ 2 × 1 + 16 } g/mol

= (24 + 32 + 64+ 126 ) g/mol

= 246 g/mol

molecular mass of total water = 7 × ( 2× atomic mass of H + atomic mass of O )

= 7 × 18 = 126 g/mol

now ,

% mass of H2O in EPSOM salt = {total molar mass of H2O/molar mass of Epsom salts }× 100

= {126/246 } × 100

= 12600/246

= 51.21 %

Explanation:

i have done it hope it helps

I think that to my calculations it should equal to 51.20 I am not sure but I tried x

Which of the following can cause a population to decrease in size?
A Lack of rain
B. More births than deaths C. Plentiful food supplies
D. Organisms moving into an area, but not out.

Answers

Answer:

D

Explanation:

because when some organisms will move from one place to another the number of population will decrease

If it’s only one choice then the answer is D because if a bunch of bears moved into a city, people would leave the city.

If it’s more than one choice then the answers are A and D because lack of rain can cause droughts which many people don’t want to live through.

A 217.6 sample of gas is collected at 9.011 atm and 127.8°C. What volume does the gas have at 44.9 atm and 11.9 °C?M

Answers

Answer:

The correct answer is = 31.04

Explanation:

The relation between volume, temperature and pressure of a fix amount of a gas can be expressed by the combined gas law:

PV/T = k

It can be written as well as

P1V1/T1 = P2V2/T2

Given:

V1 = 217.6

P1 = 9.011 atm

T1 = 127.8°C = 400.95 K

P2 = 44.9

T2 = 11.9 °C = 285.05

Solution:

Putting value in the formula

V2 = P1V1T2/P2T1

= (217.6*285.05*9.011)/44.9*400.95

V2 = 31.04

Are you sure it’s d
Plz tell me

Answers

Answer:

? which question

Explanation:

I need help with number 19 A through D

Answers

yes i uuui i you have to go eat and then we will go to eat and then go to bed and sleep

Can you give me a paragraph about the digestive system?

Answers

Answer:

The digestive system is very important to animal health. Without the digestive system earth might still be lifeless other than bacteria and what not. The digestive system is a system to keep us full and energized. It allows us to chew and swallow our food and let it break down in our belly acid. Then it departs our body through the large, small intestines to then be flushed out to sea.

~ LadyBrain

Explanation:

an organ that is part of the

digestive system his digestive system is extremely simple

Magnesium lon has less electrons than its atom

True
False

Answers

the answer is True
hope that helps

How many particles are in 13.5 grams of Beryllium ?

Answers

There would be 9.03 x  [tex]10^{23}[/tex] particles in 13.5 grams of Beryllium.

Recall that 1 mole of a substance contains 6.02 x 10^23 atoms.

Number of moles in 13.5 grams of Beryllium = mass/molar mass

                    = 13.5/9

                       = 1.5 moles

Thus, total number of atoms in 1.5 moles Beryllium:

             = 1.5 x 6.02 x 10^23

                    = 9.03 x  [tex]10^{23}[/tex]

More on the number of particles in a substance can be found here: https://brainly.com/question/1445383

PLS HELP Discuss the phenomena of sunrise and sunset seen on Earth and describe how they will be different from the perspective of outer space. YOU WILL GET POINTS IF U DO THIS PLSSSSSS

Answers

Answer:

because you are cxloser

Explanation:

Plz help..
How to name alcohols...

Answers

Answer:

Alcohols are usually named by the first procedure and are designated by an -ol suffix, as in ethanol, CH3CH2OH (note that a locator number is unnecessary on a two-carbon chain). On longer chains the location of the hydroxyl group determines chain numbering. For example: (CH3)2C=CHCH(OH)CH3 is 4-methyl-3-penten-2-ol.10  

Explanation:

Answer:

ethanol formula :C2H5Oh

What is the predicted change in the boiling point of water when 2.10 g of
barium chloride (BaCl2) is dissolved in 5.50 kg of water?

Answers

The addition of any non-volatile solutes will elevate the boiling point of the solution. The change in boiling point of water by the addition of 2.10 of barium chloride is 0.0028 ° C. Hence, option A is correct.

What is boiling point?

Boiling point of a substance is the temperature at which it changes from liquid to vapour where the two states are in equilibrium. Boiling point of a substance depends on the bond type, molecular mass and purity of it.

The change or elevation of boiling point of a solution can be determined from its molality m and elevation constant Kb and the Van't Hoff factor i as follows:

ΔT = i Kb m.

Molality of the solution is the no.of moles divided by the mass of solvent in kilogram. Given the mass of barium chloride is 2.10 g and its molar mass is 208.23 g . The no.of moles of solute is 2.10/208.23 g = 0.0100.

Molality of the solution can be calculated as follows:

Molality m = 0.0100 / 5.50 Kg

                 = 0.0018 mol/kg.

Now, the  ΔT s calculated from these values. Provided Kb of water is 0.51 ° C /mol and i = 3.

ΔT  = 0.0018 mol/kg × 0.51 × 3

       = 0.0028 ° C.

Therefore, water will boil at 100.0028 ° C. Hence, option A is correct.

To find more about boiling point, refer the link below:

https://brainly.com/question/28203474

#SPJ1

PLEASE HELP!
this is due tomorrow and i really need help!!! this is for my final grade! thank you

Answers

Answer:

what the--

Explanation:

pls tell one by one

what would the answer be? if you could help that would be a big help ^^

Answers

Answer:

well a 1000

Explanation:

What is the frequency of an electromagnetic wave that has a wavelength of
8.5 x 102 m in a vacuum? (The speed of light in a vacuum is 3.00 x 108 m/s.)

A. 1.2 x 10-3 Hz
B. 2.8 x 10-6 Hz
C. 3.5 105 Hz
D. 2.6 x 1011 Hz

Answers

ANSWER

C. 3.5 105 Hz

A student made a sketch of a potential energy diagram to represent an endothermic reaction.


Explain, using complete sentences, why the diagram made by the student is correct or incorrect. Be sure to also explain what the values of X and Y represent. (10 points)

Answers

Answer:

Incorrect

Explanation:

X is the reactants

Y is the products

In an endothermic reaction where energy is absorbed, the enthalpy the products (Y) is always higher than the enthalpy of the reactants (X).

Enthalpy change (∆H) = products (Y) - Reactants (X)

For an endothermic reaction, the ∆H value should be positive.

Enthalpy change

The diagram sketched by the students shows the opposite. The diagram shows that the enthalpy of the products (Y) is lower than the enthalpy of the reactants (X). This will give a negative value of ∆H.

It represents an exothermic reaction rather than endothermic.

Therefore, the student is incorrect.

The diagram below represents a beaker of water being heated by a flame. The arrows represent heat
transfer occurring in the beaker.
Which process is represented by the arrows in the diagram?
O condensation
O conduction
O convection
O radiation

Answers

Answer:

condensation

Explanation:

when heated beaker sed condensation

Maria examines a mixture that appears to be the same throughout. However, when she looks at a sample using a magnifying lens, she can see small droplets of liquid surrounded by another liquid.

Which conclusion best fits her observations?

Answers

Answer:

However, when she looks at a sample using a magnifying lens, she can see small droplets of liquid surrounded by another liquid. Which conclusion best fits her observations? The mixture is a solution because it has the same appearance throughout the sample

pls mark me the brainliest

18- The number of orbitals in each sublevel are:
A:-s:2, p:3, d:10, and f:14
B:-s:2, p:6, d:10, and f:14
C:-s:1, p:3, d:5, and f:7
D:-s:1, p:2, d:3, and f: 4

Answers

s2,p6,d10,f14

S contains 2 orbitals

P contains 6 orbitals

D contains 10 orbitals

F contains 14 orbitals

Silicon is in the same group of the Periodic Table as carbon. The compound
formed between silicon and hydrogen is likely to have the formula
SiHz
SiH
SizH:
SizHs

Please hurry

Answers

Answer:

SiH

Explanation:

The symbol for Silicon is Si, and the symbol for Hydrogen is H. There is no need for extra characters in the name.

Substances with a high polarity have a(low/high) surface tension ?

Answers

Answer:

I think they have high, because the nonpolar molecules usually have a much lower surface tension than polar ones.

(6) I need help very fast plsss

Answers

Their is a space so the heat is not transferred to the outside wall. Like an insulated coffee mug. If the heated liquid touched the outside wall it would cool the liquid to room temperature.

Which method is best suited for separating a 500 mL sample of two miscible liquids whose boiling points differ by approximately 60°C?
A) use of a separators funnel
B) paper chromatography
C) evaporation
D) distillation
E) fractional distillation

Answers

The correct answer is E.) Fraction Distillation.

9. How many significant figures are in the measurement 1,300 g?
2
unlimited
3
4

Answers

Answer:

4

4, because when there is no number after decimal then all the numbers are considered significant even 0 is the last number.

How does the process of cell division replace damaged cells

Cells split into two new cells with the identical genetic make up

Chloroplasts use carbon dioxide and water to create glucose

Metatron Gia uses oxygen to break down glucose and convert it to ATP


Waste passes through the cell membrane and leaves the cell

Answers

Answer:

A

Explanation:

The cells split up into two to repair the damaged cell

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