Answer:
ice absorbs heat from water.
Explanation:
Heat is a measure of molecular activity: the faster a thing's molecules move, the more heat that substance contains. And because everything is made of molecules, and molecules are in constant motion, everything contains at least some heat.
Because ice molecules move slowly and cluster tightly together, they produce a relatively low amount of heat. When ice is placed in a glass of water whose molecules are moving at a greater rate, the ice begins to absorb energy, because heat always travels from regions of relative warmth to colder areas in order to equalize temperatures. In other words, ice absorbs heat from the water.
As the water molecules lose energy, they begin to slow down, and consequently cool. So, it's kind of the opposite of what you might think: when we put ice in water, the ice doesn't give its cold to the water, it takes heat from the water.
What are the two factors that determine the gravitational force
between any two objects?
Answer:
Gravity is your answer
Explanation:
Gravity hopes this helps
A chemist determined by measurements that 0.0500 moles of nickel participated in a chemical reaction. Calculate the mass of nickel that participated in the chemical reaction.
Answer:
2.94 grams Nickle
Explanation:
All they are asking is to convert moles to grams
To do this, find the atomic mass of nickel using the periodic table: 58.693 g
0.05 mol * 58.693 g/1 mol = 2.93465 grams
Which statement best explains the type of bond that will form between two elements from group 6A in the model?
A. The two elements will form a covalent bond because both elements will share a single electron in order to have full outer shells
B. The two elements will form a covalent bond because both elements will share a pair of electrons in order to have full outer shells.
C. The two elements will form an ionic bond because one of the elements will donate one electron to the other element in order to have full outer shells.
D. The two elements will form an ionic bind because one of the elements will donate two electrons to the other elements in order to have full outer shells.
*Will give brainliest*
Answer:
D is the answer
Like my answer
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option D.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
The two elements will form an ionic bind because one of the elements will donate two electrons to the other elements in order to have full outer shells.
Therefore, the correct option is option D.
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What is the electron configuration for an Atom that has 13 electrons
Copper (ii) carbonate decomposes to form copper (ii) oxide grains and carbon dioxide gas is given off.
Answer:
yes
Explanation:
The correct equation for the decomposition of copper carbonate is:
CuCO3 → CuO + CO2
Ba(CN)2
What is the name of the compound?
Answer:
Barium cyanide
Explanation:
I don't no
The name of the compound Ba(CN)₂ is called barium cyanide.
The compound Ba(CN)₂ is called barium cyanide. It is a white crystalline solid that is soluble in water. Barium cyanide is a toxic compound and can be fatal if ingested. It is used in electroplating and other metallurgical processes.
The name of the compound is derived from the names of the elements that make up the compound. Barium is named after the Latin word for "heavy", and cyanide is named after the Greek word for "blue". The -ide suffix indicates that the compound is an ionic compound, with barium as the cation and cyanide as the anion.
The chemical formula for barium cyanide can be written in a few different ways. The most common way is to write it as Ba(CN)₂. This formula shows that there is one barium atom for every two cyanide atoms. The formula can also be written as BaCN₂, but this is less common.
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When products are being made as quickly as reactants, the reaction is said to have reached... what?
Answer: Equilibrium
Explanation:
The reactions which do not go on completion and in which the reactant forms product and the products goes back to the reactants simultaneously are known as equilibrium reactions.
For a chemical equilibrium reaction, equilibrium state is achieved when the rate of forward reaction becomes equals to rate of the backward reaction which means the products are being made as quickly as reactants
Equilibrium state is the state when reactants and products are present but the concentrations does not change with time.
Answer:
monke
Explanation:
because my mum told me we are all monke
Does anyone know this ?Please I need help
Explanation:
Entropy refers to the degree of disorderliness of system. Basically it refers to how random a system is.
Gong through the options.
A. The phase change is from solid to liquid. Liquid has a greater degree of disorderliness compared to solid hence entropy is increasing.
B. The phase change is from solid to gas. Gas particles has a greater degree of disorderliness compared to solid hence entropy is increasing.
C. The phase change is from aqueous to liquid. Aqueous solutions has a greater degree of disorderliness compared to liquid hence entropy is decreasing.
D. The reactant side has; solid + gas. In the product side, there is only gas. The product side has a greater degree of disorderliness hence the entropy is increasing.
E. The entropy of the product is greater than the entropy of the reactants hence entropy is increasing.
F. The phase change is from aqueous to solid. Aqueous solutions has a greater degree of disorderliness compared to solid hence entropy is decreasing.
If 5.3 moles of magnesium phosphate react with excess sodium chloride how many moles of magnesium chloride will be formed?
Pls help!!
1000 L of nitrogen and 2400 L of hydrogen are mixed to produce ammonia. The volume of ammonia produced is
A. 1200 L
B. 1000 L
C. 2400 L
D. 1600 L
Answer: D. 1600 L
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar volume}}[/tex]
[tex]\text{Number of moles of nitrogen}==\frac{1000L}{22.4L}=44.6moles[/tex]
[tex]\text{Number of moles of hydrogen}==\frac{2400L}{22.4L}=107.1moles[/tex]
[tex]N_2(g)+3H_2(g)\rightarrow 2NH_3(g)[/tex]
According to stoichiometry :
3 moles of [tex]H_2[/tex] require 1 mole of [tex]N_2[/tex]
Thus 107.1 moles of [tex]H_2[/tex] will require=[tex]\frac{1}{3}\times 107.1=35.7moles[/tex] of [tex]N_2[/tex]
Thus [tex]H_2[/tex] is the limiting reagent as it limits the formation of product and [tex]N_2[/tex] is the excess reagent.
As 3 moles of [tex]H_2[/tex] give = 2 moles of [tex]NH_3[/tex]
Thus 107.1 moles of [tex]H_2[/tex] give =[tex]\frac{2}{3}\times 107.1=71.4moles[/tex] of [tex]NH_3[/tex]
Volume of [tex]NH_3=moles\times {\text {Molar volume}}=71.4moles\times 22.4L/mol=1600L[/tex]
Thus volume of ammonia produced is 1600 L
Which location of the moon relative to the sun and earth may produce a lunar eclipse?
A) A
B) B
C) C
D) D
Answer:
Its just C
Also because its infront of the sun
Wow! The future is amazing. Wormholes allow travel to distant planets in a flash. In fact, you can vacation just about anywhere in the universe. I’ve been scoping out one planet in particular. The brochure says it has warm oceans, giant beaches, and incredible scenery, like nothing you’d see on Earth. The resort I want to go to is located in the planet’s Southern Hemisphere, and I want to make sure I go at the right time. Maybe you can help me. Here’s what I know. The planet, called Cryxxlyx, is tilted on its axis at 90 degrees relative to its sun. It takes about 400 days for the planet to complete one orbit of its sun. Does it matter when during its orbit I go to that resort? I’ve drawn a little diagram of the planet and its orbit. I’ve also marked the location of the resort. Remember, I want warm temperatures and lots of sunshine.
Answer:
OMG HOW COOL
Explanation:
1)How does the cut on your finger heal ? (1 mark )
2)Why is Rayon different from synthetic fibres? ( 1 mark )
3)What are synthetic fibres called? (1 mark )
4)Give examples which indicate that nylon fibres are very strong. (1 mark )
5) Explain why plastic containers are favoured for storing food . (3 marks )
6) Explain the difference between thermoplastic and thermosetting plastics. ( 3 marks)
Answer:
3) Some fibres are called synthetic because they are not made from natural fibres. Instead, they are made by chemical processing of petrochemicals. The synthetic fibres are made up of very large units called polymers. Some of the synthetic fibres are - nylon, rayon, acrylon
4) is used for making parachutes, rock climbing ropes, fishing nets, seat belts. A nylon thread is actually stronger than steel wire.
5) for the following reasons:
1. Plastic containers do not react with food
2. Plastic containers are light weight so they are easy to handle.
3. The price of plastic containers is very less as compared to other containers.
4. They have strong strength.
5.. Plastic containers are durable
6) (thermosetting plastic) have primary bonds between molecular chains and held together by strong cross-links
(Thermoplastics) have secondary bonds between molecular chains
How does the rate of temperature change depend on the temperature difference of the two beakers?
Answer:
give it your all but know your limits
Explanation:
Which of the following is an example of a ball of clay undergoing a physical change?
I. The ball is thrown into the air
II. The ball is broken into two separate halves
lll. The ball is rolled along the ground
lV. The ball is flattened into a pancake like shape
Answer:
II. The ball is broken into two separate halve. The ball is still a ball. It is just in a different form.
IV. This one is also correct because it is only changing the physical state of the ball. The ball is still a ball.
1. What do microorganisms share in common?
Answer:
Bacterial species are typified by their diversity. There are three notable common traits of bacteria, 1) lack of membrane-bound organelles, 2) unicellular and 3) small (usually microscopic) size.
Explanation:
What Are the Characteristics Common to All Bacteria?
Single-Celled. Perhaps the most straightforward characteristic of bacteria is their existence as single-celled organisms. ...
Absent Organelles. ...
Plasma Membrane. ...
Cell Walls. ...
DNA.
A scientist was studying a population of elephants. The first year, he counted a population of 80. Over the next eight
years, the population's numbers were 94, 100, 103, 110, 125, 120, 125, 120. What appears to be the carrying capacity
for this population?
0 120
0124
O 125
O 126
Answer:
The carrying capacity of this population would be 125 we know this because we see that this number occur multiple times and seems to be the tipping point after which the number of the population always go down
Answer:
The carrying capacity of this population would be 125 we know this because we see that this number occur multiple times and seems to be the tipping point after which the number of the population always go down
Explanation:
The combustion of a sample of butane, C4H10 (lighter fluid), produced 2.46 grams of water.
2 C4H10 + 13O2 -------> 8CO2 + 10H2O
(a) How many moles of water formed?
(b) How many moles of butane burned?
(c) How many grams of butane burned?
(d) How much oxygen was used up in moles?
(e) How much oxygen was used up in grams?
a. 0.137
b. 0.0274
c. 1.5892 g
d. 0.1781
e. 5.6992 g
Further explanationGiven
Reaction
2 C4H10 + 13O2 -------> 8CO2 + 10H2O
2.46 g of water
Required
moles and mass
Solution
a. moles of water :
2.46 g : 18 g/mol = 0.137
b. moles of butane :
= 2/10 x mol water
= 2/10 x 0.137
= 0.0274
c. mass of butane :
= 0.0274 x 58 g/mol
= 1.5892 g
d. moles of oxygen :
= 13/2 x mol butane
= 13/2 x 0.0274
= 0.1781
e. mass of oxygen :
= 0.1781 x 32 g/mol
= 5.6992 g
0.137moles of water is formed, 0.0274 moles or 1.5892 g of butane burned and 0.1781 moles or 5.6992 g of O₂ is used.
What is combustion reaction?Those reaction in which fuel is oxidized by the oxygen molecules and produce carbon dioxide and water molecule.
Given chemical reaction is:
2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O
Given mass of water = 2.46 grams
Moles will be calculated as:
n = W/M, where
W = given mass
M = molar mass
(a) Moles of water formed is calculated as:
Moles of water n = 2.46g / 18 g/mol = 0.137moles
(b) From the stoichiometry of the reaction, it is clear that:
10 moles of water = produced by 2 moles of butane
0.137 moles of water = produced by 2/10×0.137=0.0274 moles of butane
(c) Weight of butane is calculated by using moles:
W = 0.0274 × 58 g/mol = 1.5892 g
(d) From the stoichiometry of the reaction, it is clear that:
2 moles of butane = react with 13 moles of O₂
0.027 moles of butane = react with 13/2×0.027=0.1781 moles of O₂
(e) Mass of oxygen is calculated as:
W = 0.1781 x 32 g/mol = 5.6992 g
Hence, (a) 0.137moles, (b) 0.0274 moles, (c) 1.5892 g, (d) 0.1781 moles and (e) 5.6992 g.
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How many moles are in 5.025 grams of NaOH?
Answer:
The SI base unit for amount of substance is the mole. 1 grams NaOH is equal to 0.025001806380511 mole.
Answer:
0.025001806380511 mole.
Explanation:
The SI base unit for amount of substance is the mole. 1 grams NaOH is equal to 0.025001806380511 mole.
Write the name of CO
Answer:
cobalt
Explanation:
Which of the following is an example of a chemical element a. Salt B.water c.sugar d.sodium
Answer:
the answer is sodium
Explanation:
hope this helps
Pb(NO3)2+K2CrO4 →PbrCrO4 +2KNO3 classify the chemical reaction
Which of the following are properties of the oxides of non-
metals?
property 1
property 2
A
acidic
covalent
B.
acidic
ionic
С
basic
covalent
D
basic
ionic
(a)
(b)
(d)
Answer:
it is option A hope it helps
The properties of nonmetallic oxides include acidity and covalent character. Hence, option A is correct.
What are non-metals?Non - metals are elements in the rightmost side of the periodic table. Non -metals are mostly gases and some of them include, metalloids also. Non-metals are commonly electron -deficient and some of them are highly electronegative.
A compound shows covalent character, if the electrons are shared between the constituent atoms. Covalency increases from left to right in periodic table.
As the covalent character increases, acidity increases. Oxides of non-metals are electrophiles and acts as Lewis acids. They are all covalent compounds. Therefore, option A is correct.
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I really need help, I don’t know what to do on this
Answer:
A: dependent variable
B: experimental group
C: independent variable
D: control variables
E: control group
Explanation:
true or false
sugar melting an example of oxidation
and
water evaporating
Answer:
false i think
Explanation:
¿Qué elemento rompe la regla del carácter metálico?
Which element breaks the rule of metallic character?
Answer:
the machete
Explanation:
:)
how many energy levels does a sodium atom have?
the element sodium has 1,000,000 million energy levels. in an electrically neutral sodium atom- there are 3 energy levels.
Answer:
Sodium has 11 electrons. The first two fill the innermost energy level. The second energy level is also full, holding eight electrons and one electron remaining in the outer energy level. It is the number of outer electrons that give an element its chemical properties.
Explanation:
Bainliest. Mole Conversion
Using dimensional analysis determine how many moles are present in 125g of Oxygen gas. O = 16.0 g/mol (3 sig figs)
Answer:
125g × 1 mol/16 grams = 7.81 × avogadros #
PLEASE HELP RN ITS URGENT
Answer: transporting oxygen-rich blood to the body
Explanation:
ammonia gas cannot be collected in an erect gas jar?why?
Answer:
ammonia being lighter than air, is collected by downward displacement of air in an inverted gasjar
The gas jar is used to collect ammonia gas. This gas can be barely dissolved in water. As a result, the downward displacement of water does not gather it in the jar.
What is ammonia ?With the formula NH3, ammonia is a nitrogen and hydrogen inorganic chemical. Ammonia, the simplest pnictogen hydride and a stable binary hydride, is a colorless gas with a strong, pungent odor.
Because it is simpler to install inlets and outlets in one end of an erect gas jar than it is to install them on the side or the bottom, which are required for placement on a stable surface.
Ammonia is prepared in a laboratory by forcing air downward to collect the gas. Due to the high solubility of ammonia in water, it is impossible to collect ammonia gas over water.
Thus, The gas jar is used to collect ammonia gas.
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