Answer:
The answer is OXIDATION REACTION.
Answer:
There's no other metal.
Explanation:
Iron reacts only with water and air to get the object rusted. There is no other metal which reacts with iron to get the object rusted.
However,
Zinc can be used to protect Metal from Rusting.
112,300 joules heat is transferred when 240 g of a
metal sample is cooled from 880 °C to 13 °C. What
is the specific heat of this metal?
Answer:
0.54 J/goC
Explanation:
Recall that we define the heat transferred as ;
H= mcθ
Where;
H= heat transferred = 112300J
m= mass of the metal= 240g or 0.24 Kg
c= specific heat capacity of the metal = the unknown
θ= change in temperature = (880°C-13°C) = 867°C
Substituting values and making the specific heat capacity the subject of the formula;
c= H/mθ
c= 112300/ 240×867
c= 0.54 J/goC
Hence, the specific heat capacity of the metal is 0.54 J/goC.
what do the conclusions tell about the experiments?
A) the conclusions tell what other scientists think about the experiment
B) the conclusions tell how the experiments should be repeated
C)the conclusions tell why the data support or reject the hypothesis
D) the conclusions tell if the scientific method was followed
Help Please !!!!!!!!!!!!!!!!
Answer:
C
Explanation:
APEX
the conclusions of an scientific experiment tell why the data support or reject the hypothesis. Thus option C is correct.
What is scientific experiment ?Scientific experiment involve asking different scientific questions, making hypothesis, design experiment, result and conclusion.
A good scientific experiment should have some facts which can be answered by using data analysis.
The types of scientific questions are Verification questions, Theory questions, Experimental questions
The verification question can be solved by collecting data from observation, which include characteristics or properties of a subject.
A theory question refers an imaginative exercise, is not fictional, depend on prior knowledge of the phenomenon being asking about.
The scientific question or an experimental question used to compare the element of a system when altered, it involves variables such as independent, dependent and controlled variables.
Thus option C is correct.
Learn more about scientific experiment, here:
https://brainly.com/question/1347425
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Do scientists believe that an Atom is made up of elements
vice versa: atoms are elements, so elements are made of atoms specifically 1 atom or multiple of the same kind
a metal becomes Luminous when it is heated to a very
Answer:
High temperature
Explanation:
A metal becomes luminous when it is heated in extreme temperatures.
list the ions in solution in the electrolysis of conc.sodium chloride
Choose the correct answer:
In a galvanic cell:
a- The reactions taking place are non spontaneous
b- The cathode is negative
c- Electrical energy is converted into chemical energy
d- Chemical energy is converted into electrical energy
Answer:
D.
Explanation:
In a Galvanic cell:
1) Spontaneous reactions take place
2) Chemical Energy is converted to some useful electrical energy
can anyone just help me with these
Identify the following compounds as either ionic (I)or Covalent (c)
Explanation:
3 C
4 C because bonds of non-metal to non-metal N to O
5 I because metal ion loss valence electron Ca2+ non-metal gains valence electron F-
Why is corn considered a material resource and an energy resource?
Answer:
This is because Corn is grown on land and has important values to man .These values include as a source of food for man and animals. It is also used as raw materials for the production of certain goods such as flour etc.
It is an energy resource because fermentation of corn gives rise to ethanol fuel which is used as a source of power to run machines and other equipment.
Match each phrase with the description of how it affects precipitation,
prevailing winds
blow in opposite direction of normal winds
and cause droughts in winter
mountain ranges
blow mainly in one direction and move huge
air masses
seasonal winds
force coastal air masses to rise, cool, and
form rain clouds
Answer:
Seasonal Winds: Blow in opposite direction of normal winds and cause droughts in winter.
Prevailing Winds: Blow mainly in one direction and move huge air masses.
Mountain Ranges: force coastal air masses to rise, cool, and form rain clouds.
Explanation:
Hope this helps you, sorry for responding so late... have an amazing night, day, or evening
The term precipitation implies the falling of rain due to condensation of water vapor in the cloud.
What is precipitation?The term precipitation implies the falling of rain due to condensation of water vapor in the cloud. We must note that several factors affect precipitation in a given area.
The following phrases below are matched with how it affects precipitation;
Seasonal Winds - Blow in opposite direction of normal winds and cause droughts in winter.Prevailing Winds - Blow mainly in one direction and move huge air masses.Mountain Ranges - force coastal air masses to rise, cool, and form rain clouds.Learn more about precipitation: https://brainly.com/question/11739819
Why do reactions need to be balanced?
A. Because the reactants must be the exact same as the products
B. Because of the conservation of energy
C. Because the volume of reactants must equal the volume of
products
D. Because atoms are not lost or gained in a chemical reaction
Answer:
A part.
Explanation:
Because the reactants must be the exact same as the the products.
List the functions of proteins in the text area below
Answer:
There are various types of proteins with a number of different functions they perform. These functions can include:
Helping in the digestion of food by catabolizing nutrients into monomeric units .Carrying substances in the blood or lymph throughout the body .Constructing different structures, like the cytoskeleton . Coordinating the activity of different body systems . Protecting the body from foreign pathogens .Effecting muscle contraction Providing nourishment in early development of the embryo and the seedlingHope this helps!
Answer:
provide structure
transport substances
fight diseases
regulate cell processes
send messages
create movement
Explanation:
'cause i did it edge 2020
balance the equation to show the reaction between H2SO4 and cu(OH)2
Answer:
H2SO4 + Cu(OH)2 ---> CuSO4+ 2H2O
The general formula for an amino acid is: RCHCOOH RCHNH 2COOH RNH 2OOH RNH 2COH
Answer:
RCHNH2COOH
Explanation:
R - CH - COOH
|
NH2
Amino acid formula.
Answer:
RCHNH2COOH
Explanation:
natural processes that remove CO2 from air
Answer:
Forests
Explanation:
Photosynthesis removes carbon dioxide naturally and trees are especially good at storing carbon removed from the atmosphere by photosynthesis.
Answer:
Trees / Forests / Rain forests
Explanation:
Trees remove CO₂ from air because they need it for their cellular respiration.
4. Use the kinetic theory to explain the following
(a) When you take a block of butter out of the fridge, it is quiet hard. After 15 minutes it is soft
enough to spread
Air particles hits the butter particles from collisions that air transfer kinetic energy to the butter. The butter particles then begins to move from each other more faster. So when the particles are becoming lose, the butter (solid) turns to soft butter (slight liquid, slight solid).
l. Loosening of immigration policies
II. Subsidies for families with children
III. Lower taxation on families with children
Some countries desire an increase in the growth rate of their population in order to provide a base for economic growth. Which choice
represents policies that will increase a country's population growth?
A)
I only
B)
Il only
9
III only
D)
I, II, and III
Answer:
I think is the third one
how many joules of heat are absorbed when 1000g of water is heated from 18Celsius to 85celsius?
Answer + Explanations
Calculate heat absorption using the formula:
Q = mc∆T
Q means the heat absorbed, m is the mass of the substance absorbing heat, c is the specific heat capacity and ∆T is the change in temperature.
The heat absorbed is calculated by using the specific heat of water and the equation ΔH=cp×m×ΔT. 4. Water is vaporized to steam at 100oC. The heat absorbed is calculated by multiplying the moles of water by the molar heat of vaporization.
You can do this easily: just multiply the heat capacity of the substance you're heating by the mass of the substance and the change in temperature to find the heat absorbed.
To calculate the amount of heat released in a chemical reaction, use the equation Q = mc ΔT, where Q is the heat energy transferred (in joules), m is the mass of the liquid being heated (in kilograms), c is the specific heat capacity of the liquid (joule per kilogram degrees Celsius), and ΔT is the change in ...
Q = mc∆T. Q = heat energy (Joules, J) m = mass of a substance (kg) c = specific heat (units J/kg∙K) ∆ is a symbol meaning "the change in"
Precisely, water has to absorb 4,184 Joules of heat (1 calorie) for the temperature of one kilogram of water to increase 1°C. For comparison sake, it only takes 385 Joules of heat to raise 1 kilogram of copper 1°C.
A reaction that absorbs heat is endothermic. Its enthalpy will be positive, and it will cool down its surroundings. This reaction is exothermic (negative enthalpy, release of heat).
Quantitative experiments show that 4.18 Joules of heat energy are required to raise the temperature of 1g of water by 1°C. Thus, a liter (1000g) of water that increased from 24 to 25°C has absorbed 4.18 J/g°C x 1000g x 1°C or 4180 Joules of energy.
Select all that apply.
A beta particle:
1.) is electromagnetic energy
2.) is an electron
3.) has zero charge
4.) is emitted from the nucleus
5.) has a +2 charge
6.)has a -1 charge
Answer: 2, 4, 6
Explanation: A beta particle is a high energy electron, emitted from the radioactive disintegration of an atomic nucleus. It has a -1 charge.
ASAP..pls need help.....
what heppens when humans waste, biological waste and industrial waste is dumped into the water??
Answer:
It releases nutrients which causes rapid growth of planktons which leads to oxygen deficiency leading to death of aquatic animals,a phenomenon known as eutrophication.
Explanation:
A compound contain only carbon, Hydrogen, Oxygen. Mass percentage of carbon is 52.2%, relative molecular mass of compound is 46, Find how many hydrogen atom present
Answer:
Six
Explanation:
Mᵣ = 46
Aᵣ(C) = 0.522 × 46 = 24
Difference = 22
Less 1 O = -16
Aᵣ(H) = 6
The relative atomic mass of the H atoms is 6.
The molecule contains six hydrogen atoms.
convert 5.74x10^8 to standard form
Answer: 574000000
Explanation: I hope this helps!
5.74 ⇒ 57.4 ⇒ 574 ⇒5740 ⇒ 57400 ⇒ 574000 ⇒ 5740000 ⇒
57400000 ⇒ 574000000
In order to answer this question, you need to look around your immediate surroundings to find examples of rusting of iron or any other metal. i. What makes iron rust? ii. Why is the rusting of iron a problem? Give any 3 examples from daily life where rusting has been a disadvantage. iii. Suggest any two ways that can help prevent rusting of iron.
Answer:
(i) rusting is caused by the reaction of oxygen and water on the surface of metals(iron).
(ii) rusting of iron makes it weak and dangerous for buildings since their foundation is made of iron, rusting renders cars useless, rusting can cause accidents.
(iii) by galvanizing iron
and by coating it.
Explanation:
hope it helps .
What is the velocity of a wave with a wavelength of 0.03 m and a frequency of
120 Hz?
Answer:
3.6m/s
Explanation:
v= fλ
v= 120* 0.03
v= 3.6 m/s
What is the electron configuration when the valence electrons are removed from each of the elements listed in the chart?
A.1s22s22p63s2
B.1s22s22p6
C.1s22s2
D.1s22s22p63s1
Answer:
A. 1s²2s²
B. 1s²
C. 1s²
D. 1s²2s²2p⁶
Explanation:
The valency electron is the outer electron of an element. The valency electron resides in the outermost region of the shell.
Using the general configuration for the first 20 elements 2 8 8 2 the valency electrons can be identified.
A. 1s²2s²2p⁶3s² . The valency electron here are 2p⁶ and 3s² . Removing the valency electron we have 1s²2s²
B. 1s² 2s² 2p⁶. After removing the valency electron the configuration will be 1s².
C.1s²2s². After removing the valency electron the configuration will be 1s²
D.1s²2s²2p⁶3s¹. Removing the valency electron the electron configuration will be 1s²2s²2p⁶
can you help.me this above question. ..
Answer:
Explanation:
Chlorine halogen
Non-metal oxygen
Metal calcium
Ethyne C2H2
Ethene C2H4
Discuss 3 factors that affect the solubility of a solid in a liquid.
Answer:
Explanation:
Temperature: increasing the Temperature increases the solubality
Polarity: increase of polarity increases the soluablity of polar solutes
The larger the molecules of the solute are, the larger is their molecular weight and their size. It is more difficult it is for solvent molecules to surround bigger molecules.
For majority of solid and liquid solutes, pressure does not affect solubility. it is applciaable only for gasesous solute
Hope this helps you
49)Solid sodium metal reacts violently with water, producing hydrogen gas (H2) and sodium hydroxide. How many moles of hydrogen gas are formed when 15.3 g of sodium are added to water?
Answer:
Number of moles of hydrogen gas produced when 15.3 g of sodium reacts with water = 0.333 moles of hydrogen gas
Explanation:
The reaction between sodium metal and water is given by the chemical equation below:
2Na(s) + 2H₂O(l) ------> 2NaOH(aq) + H₂(g)
From the equation of reaction above, 2 moles of sodium reacts with 1 mole of water to produce 2 moles of sodium hydroxide and 1 mole of hydrogen gas.
mole ratio of sodium and hydrogen gas is 2:1
molar mass of sodium =23 g/mol:
number of moles of sodium present in 15.3 g = mass/molar mass
number of moles of sodium present in 15.3 g = 15.3 g/ 23 g/mol = 0.665 moles
number of moles of hydrogen gas produced = 0.665 * 1/2 = 0.333 moles
Therefore, number of moles of hydrogen gas produced when 15.3 g of sodium reacts with water is 0.333 moles
what type of reaction is : CaCo3+ HCl = CaCl2 + CO2 +H2O
Answer:
Double decomposition reaction
Explanation:
When hydrochloric acid reacts with any carbonates/hydrogen carbonates the products formed are metal chloride , water and carbon dioxide.Since HCl decomposes salts of weaker acids.
So the equation of the reaction between calcium carbonate and HCl is:
CaCO3+2HCl =CaCl2+H2O+CO2
This reaction is also known as double decomposition reaction.
Answer:
Double decomposition reaction
Explanation:
When hydrochloric acid reacts with any carbonates/hydrogen carbonates the products formed are metal chloride , water and carbon dioxide. Since HCl decomposes salts of weaker acids. This reaction is also known as double decomposition reaction.
How does temperature affect the rate of a reaction?
A. Increasing the temperature decreases the potential energy of the
reactants.
B. Increasing the temperature gives the molecules more kigetic
energy
C. Increasing the tek perature increases the concentration of the
reactants
D. increasing the per perature lowers the activation energy of the
reaction
Which of the following is not an oxidation-reduction reaction?
XeFg(s) — XeF_(s) + Fz(9)
Answer:
Option C on edge
Explanation:
