Answer:
they lose their water
Explanation:
When exposed to air washing soda crystals lose their water of crystallisation and become amorphous. ∴ The phenomenon is called efflorescence.
toms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group. How does this help explain the difference in the reactivity of metals within a group?
Answer:
Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group. ... The valence electrons of the larger atoms are farther from the nucleus and are easier to remove, so the metals near the bottom are more reactive than those at the top.
While watching tv in your room one nigh, you decide to have some Oreos and a glass of milk. there were only 3 Oreos and science you pored a huge glass of milk you couldn't finish it all. Instead of taking it to the kitchen, you put the glass of milk under your bed. Your mom discovered it three months later when she was cleaning your room. The cup no longer had a white liquid...it now contained a semi-solid layer of cheese like stuff floating on top of a clear liquid. Did a chemical reaction take place, yes or no? what evidence or lack of evidence do you have to support your answer?
Answer:
yes it did.
Explanation:
the product must have produced a smell therefore it created a gas. this means it was a chemical reaction
Describe one way that grazing animals, such as bison or cattle, help to maintain grassland ecosystems.
Answer:
They fertilize the land and help with overgrowth.
Explanation:
The one way that grazing animals help to maintain grassland ecosystems is: It enhance the plant to grow.
Ecosystems enables both living organisms such as animals and non living organisms such as plant to communicate with one another in an environment.
Grazing animals is essential as it help to maintain the grassland ecosystems by quicken and boosting the growth of plant which inturn help to maintain a very healthy and sustainable ecosystems.
Grazing lead to the restoration of habitat as it help to restore back any form of damaged that occur to the natural resources of ecosystems.
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what is amphoteric oxide please also give eg
Answer:
An amphoteric oxide is an oxide that can act as either an acid or base in a reaction to produce a salt and water. Amphoterism depends on the oxidation states available to a chemical species. Because metals have multiple oxidation states, they form amphoteric oxides and hydroxides.Many metals (such as zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides. Amphoterism depends on the oxidation states of the oxide. Al2O3 is an example of an amphoteric oxide. Amphoteric oxides also include Lead (II) oxide, and zinc (II) oxide, among many others.[2]
Explanation:
hope this will help you
Answer:
Amphoteric oxides react with both acids and alkalis to form salt and water. Examples of amphoteric oxides are zinc oxide and aluminium oxide.
Explanation:
hope it helps....
How would Earths revolution be affected if it had a larger orbit??
Answer:
When the Earth rotates on its axis, it prevents air currents from going in a straight line to the north and the south from the equator. It results in one of the effects of rotation of the Earth: the Coriolis Effect.
Where must you be standing if the Sun appears to be directly overhead at noon?
O A. At the South Pole
O B. At the North Pole
O C. At a point somewhere along the prime meridian
O D. At a point somewhere along the equator
Answer:
D
Explanation:
at a point somewhere along the equator
In the case when the Sun appears to be directly overhead at noon should be along with the equator.
What is the equator?It is considered to be the imaginary line that should be arounded with the middle of the planet or the celestial body. It is halfway that lies between the North Pole and the South Pole, at 0 degrees latitude. In the equator, it divides the planet into a Northern Hemisphere and a Southern Hemisphere
Therefore, based on the above explanation, the option d is correct.
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Which cup has more thermal energy?
2 liter cup of milk
1 liter cup of milk
Both have the same amount of thermal energy
Question: Which cup has more thermal energy?
A. 2 liter cup of milk
B. 1 liter cup of milk
Answer: A. 2 liter cup of milk
Explanation:
We have milk in both of the containers. The milk in both containers is the same temperature, so we will have to measure the amount of molecules. The amount of molecules makes it warmer, and if it is warmer, that is more energy. 2 liters have more thermal energy than 1 liter, because it has more molecules.
Our answer is 2 liter cup of milk.
Genes are found inside chromosomes and DNA is contained in the genes.
True
False
I believe that's true.
When 2 or more different atoms chemically combine A. Element B. Compound
Answer:
compound
Explanation:
Answer:
compound
Explanation:
A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds. When two hydrogen atoms combine with one oxygen atom, it becomes the compound water
THIS IS DUR IN LIKE 15 MINS PLS
Answer:
A. Wisconsin
Explanation:
In the graph, Wisconsin has the highest speed limit.
The______________ the maximum amount of product that could be formed from the given amounts of reactants. The _______ is the amount of product that is actually formed when the reaction is carried out in the laboratory. The ___________ is the ratio of the actual yield to the theoretical yield, expressed as a percentage.
1.percent yield
2.theoretical yield
3.actual yield
HELP ASAP 50 POINTS & WILL BE MARKED BRAINLY
The Theoretical yield is the highest amount of product that could be formed from the allocated amounts of reactants.
What is Theoretical yield?
The Theoretical yield is the greatest amount of product that could be formed from the given quantities of reactants.
The Actual yield is the quantity of product that is formed when the response is carried out in the laboratory.
The Percent yield is the ratio of the authentic yield to the theoretical yield, described as a percentage.
Percentage Yield Formula: When the product that we are obtained after a chemical reaction is known as the yield. We can estimate this accepted yield in moles or grams.
It is the ‘authentic yield’ that we acquire after the completion of a chemical reaction. Separated from this, established on our estimation, we calculate the anticipated yield of a reaction comprehended as the ‘theoretical yield.’
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Can any person help me for this problem? Anyone's welcome
Answer:
The anode made of the impure copper
The cathode made of pure copper
The electrolyte of copper (II) sulfate CuSO₄ solution
The silver impurities at the anode due to their high tendency of accepting electrons and being a stronger reducing agent than either copper or zinc will remain relatively in place and relatively stable and will not actively take part in the oxidation reaction taking place at the anode
The zinc impurities will be the first element of the three metals to give up electrons and go into the solution as zinc ions due to their high tendency to loan out two electrons and become oxidized into Zn²⁺ ions
The drawing of the electrolytic cell created with Microsoft Visio is attached
Explanation:
Which of these is a sentence fragment?
The dog barked.
The skateboard wiggled back and forth.
The dog that was riding a skateboard.
We laughed at the dog on the skateboard.
Answer:
the dog barked is the answer
where are the largest elements
Answer:
the first two elements of array are checked and the largest of these two elements are placed in arr[0]
the first and third elements are checked and largest of these two elements is placed in arr[0] .
this process continues until the first and last elements are checked.
Explanation:
Then you would find the largest Elements
Answer:
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
what is crystal?.give any example
Answer:
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.Example- Snowflakes, diamonds, and table salt.
Answer:
Examples of everyday materials you encounter as crystals are table salt (sodium chloride or halite crystals), sugar (sucrose), and snowflakes. Many gemstones are crystals, including quartz and diamond. There are also many materials that resemble crystals but are actually polycrystals
Explanation:
a crystal is a piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces.
If the potato solution was boiled for 10 minutes and cooled for 10 minutes before being tested, the average time for the disks to float to the surface of the hydrogen peroxide solution would be___________.
Answer:
more than 30 seconds
Explanation:
theres some extra
question : To study the actions of the enzyme catalase on hydrogen peroxide, students performed the following experiment. Catalase was extracted from potatoes and stored on ice. The following hydrogen peroxide solutions were made: 1%, 5%, 10%, 15%. Filter paper disks were soaked in the catalase then dropped into each of the solutions. Enzyme activity was measured by the time it took for the disks to float from the bubbles produced. Here is the data:
Which of the following best describes why the disks float faster to the surface in more concentrated solutions?
asnwer
the higher substrate concentrations in the more concentrated solutions speeded up the reaction
yw!
when an atom reacts, its goal is to become more stable by filling is outer electron shell what are three ways that an atom can fulfill this goal
The three ways that an atom can fulfill this goal is to give away electrons, take an electron, and share electrons.
When an atom reacts ,its goal is to become more stable by filling its outer electron shell by gaining, loosing or sharing electrons.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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PLZ HELP!!! Choose A B or C
Answer:
c?
Explanation:
sorry, im not too great with this lol. i probably have it wrong, so i wouldnt really trust my answer lol.
A solution is prepared by dissolving 250 g of CH4N2O into 6.0 L of solution. What is the molarity of this solution?
________M
Answer:
Molarity = 0.65 M
Explanation:
Given data:
Mass of CH₄N₂O = 250 g
Volume of solution = 6.0 L
Molarity of solution = ?
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
Number of moles of solute:
Number of moles = mass/molar mass
Number of moles = 250 g/ 64.08 g/mol
Number of moles = 3.9 mol
by putting values,
Molarity = 3.9 mol / 6.0 L
Molarity = 0.65 M
What is the result of cellular respiration? (A) Energy for cell processes is released. (B) Oxygen is released for photosynthesis. (C) Cells undergo decomposition. (D) Nutrients are excreted to prevent the buildup of body fat.
Answer:
A Energy for cell processes is released
An ionic bond is made from a ___ and a ___.
How many moles of Cl in 38.5 mol of CCl2F2?
Answer:
77 moles
Explanation:
The given chemical compound is CCl2F2 is called Dichlorodifluoromethane. In CCl2F2, we have:
one mole of a Carbon atom.
two moles of Chlorine atom; &
two moles of Fluorine atom.
Given that one mole of Chlorine = 38.5 moles.
Then, two moles will be:
= 2 × 38.5 moles
= 77 moles
Which unit is used to express the amount of energy in food?
Answer:
Calories or Protein don't judge me if i'm wrong on both -__-
Explanation:
CrO3 = Cr2O3 + O2
how do i balance this?
Answer:
4cro3=2cr2o3+3o2
Explanation:
on left hand side there is 4cr and 12o where as now on wright hand side we have 4cro6+6o which makes 4cr and 12o which is equal to the left hand side.
Answer:
4CrO3====> 2 Cr2O3 + 3O2
Explanation:
Before dealing with the Cr, I think you might want to deal to work with the oxygen in Cr2O3
You might want to turn that into an even number. You could put a 2 in front of the Cr2O3, but looking ahead, I can see that will give you a fractional amount for the O2. So I'll use a 4
CrO3 ===> 4 Cr2O3 + O2
That means you have 8 Cr s on the right. Balance that on the left
8CrO3 =====> 4 Cr2O3 + O2
You've balanced The Cr s. So now lets look at the oxygens. There are 8*3 oxygens on the left hand side. The right has 12 + 2. Don't touch the Cr2O3. You are done with them.
You need 12 more oxygens on the right. You have 2. So multiply the Oxygens by 6
8CrO3 ===> 4 Cr2O3 + 6 O2 There's a factor of 2 common. Divide by 2
4CrO3====> 2 Cr2O3 + 3O2
What is Industrial chemistry?
Answer:
study of chemical used in industries
While looking in the sky, you notice birds that are soaring but not moving their wings. How is it possible that they are still flying?
Le Châtelier's principle applies to gas exchange reactions in human lungs.
Carbon dioxide gas combines with water in the blood to form carbonic acid:
H2O + CO2 = H2CO3
During exercise, the concentration of CO2 in the blood increases. How would
this affect the reaction's equilibrium?
A. It would favor the forward reaction.
B. It would favor the backward reaction.
C. It would maintain the reaction's equilibrium.
D. More information is needed to assess the reaction's equilibrium.
Answer:
The correct option is;
A. It would favor the forward reaction
Explanation:
Le C_h_a_t_e_l_i_e_r_'s principle states that for a system in dynamic equilibrium a change in the volume, pressure, concentration, or temperature will cause a predictable shift in the reaction to bring about a shift in the equilibrium position which counteracts the change and bring about the establishment of a new equilibrium
Therefore, in the reaction, H₂O + CO₂ → H₂CO₃, we have;
An increase in the amount of the CO₂ concentration in the blood, increases the quantity of the reactants more than the quantity present at equilibrium, therefore, the number of reaction between the H₂O and the CO₂ increases resulting in the formation of more H₂CO₃, therefore, favoring the forward reaction.
Answer:
A. It would favor the forward reaction.
Explanation:
A.P.E.X
Whats a formula for calcium hydroxide?
Answer:
Ca(OH)2
Explanation:
PLEASE HELP this is due today the picture is below
Answer:
Explanation:
Ok so the first one would be Electrical energy and Radiated energy
Then the 2 question it would be not electrical but the other 3 for the 3 question it would be it would be Electrical and the radiated energy
And for the last one it would be the last 3
Which statement explains why water is classified as a compound
Answer:
Water is a compound. It contains more than one element: hydrogen and oxygen atoms are joined together;