Select the correct answer. Which substance is made of polymers? A. marble B. protein C. salt D. steel
Answer:
the answer is B proteins
Explanation:
brainliest pls
Answer:
B. protein
Explanation:
A polymer is defined as a molecule which has 'n' number of monomer units.
Similarly proteins are also polymers as they are made up of amino acids and contain a number of repeated units just like polymers.
Which of the following best defines an acidic solution?
Answer:
D is the correct answer
Explanation:
A is incorrect because anything above 7 on the PH scale is a base
B is incorrect because anything equal to 7 is neutral
C is incorrect because there is no substance less than 0 on the PH scale.
Hopefully this helps.
A gas is produced when 25 g of substance X is mixed into 60 g of solution Z in a beaker. The mass of the solution in the beaker after the reaction is 75 g. What is the mass of the gas released?
(X + Z -> gas + solution)
mass of the gas = 10 g
Further explanationThe law of conservation of mass :
In a closed / isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.
Reaction
[tex]\tt X+Z\rightarrow gas+solution[/tex]
mass before reaction=mass after reaction
[tex]\tt 25+60=gas+75\\\\gas=25+60-75=10~g[/tex]
I will give brailiest to whoever needs it!
Answer:
pls pls pls pls pls give me brainliest i just need one more plssssssss
Explanation:
Describe a method to calculate the average atomic mass of using only the atomic masses of
lithium-6=6.01512amu
and lithium-7= 7.01600amu
Answer:
Average amu is 6.52556
Explanation:
Average the numbers
Add the two masses together.
6.01512+ 7.01600= 13.03112
Then divide by 2, we divide by 2 because that is how many #'s we are given.
13.03112/ 2= 6.52556
Heyy, I am a 14 year old girl
Hi can someone help me with this question!
First one to answer it I will make u brainliest
Answer:
Test 2
Explanation:
............................................
Answer:
(B) Test 2
Explanation:
The entire substance changed, and turned into a liquid.
During free fall which object would have a greater acceleration, an object with a mass of 240 kg or an object with a mass of 10 kg? Explain your answer.
Answer:
Leroy Jeakins
Explanation:
Catus jack f me in the asss
is orange juice a element or a mixture
Orange juice is mixture.
Answer:
[tex]\boxed {\boxed {\sf Mixture}}[/tex]
Explanation:
An element is pure and all the atoms have the same atomic number. An element has a symbol and can be found on Periodic Table of Elements.
A mixture is created when two or more substances are combined physically.
Orange juice can't be found on the Periodic Table of Elements. Orange juice is made up of many different substances/ingredients, like water, sugar, and juice from the orange.
Therefore, orange juice is considered to be a mixture. More specifically, a homogenous mixture because it is uniform. (*applies to pulp-free orange juice). If it has pulp, it would be a heterogenous mixture.
The chemical equation shows only the reactants and one product. How many H atoms must be present in the second product that is formed?
Answer: In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products. If we count the number of hydrogen atoms in the reactants and products, we find two hydrogen atoms.
the number of neutrons in an atom can be found by subtracting the atomic number from the what?
Answer:
This approximation of mass can be used to easily calculate how many neutrons an element has by simply subtracting the number of protons from the mass number. Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers.
Explanation:
Answer:
mass number
Explanation:
whats the balanced chemical equation for the standard formation reaction of solid glucose, where everything can only have 1 mole with physical states.
Answer:
6C(s) + 6H2(g) + 3O2(g) --------------------> C6H12O6(s).
Explanation:
One of the examples under the type of sugar; monosaccharide(simple sugar) is the glucose. Glucose(with IUPAC name as D-glucose) as a monosaccharide (simple sugar) has the molar mass of 180.156 g/mol and a Melting point of 146 °C.
Thus, the unbalanced chemical reaction for the formation of glucose is given below;
C(s) + H2(g) + O2(g) --------------------------> C6H12O6(s) ΔH°f = -1273.1KJ/mol.
The balanced chemical reaction for the formation of one mole of glucose is given as;
6C(s) + 6H2(g) + 3O2(g) --------------------> C6H12O6(s).
The balanced chemical equation for the standard formation reaction of solid glucose is: [tex]\mathbf{6C_{(s)} + 6H_{2(g)} +3O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ }[/tex]
Glucose is a simple sugar of a class of carbohydrates known as monosaccharides. It is the principal metabolite for energy production in the human body.
The formation of solid glucose [tex]\mathbf{C_6 H_{12} O_6_{(s)}}[/tex] occurs by the reaction of carbon, hydrogen, and oxygen.
The reaction formation of the solid glucose is:
[tex]\mathbf{C_{(s)} + H_{2(g)} +O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ \Delta H_f^0= -1273.1 \ kJ/mol}[/tex]
Now, the balanced chemical equation can be expressed as follows;
[tex]\mathbf{6C_{(s)} + 6H_{2(g)} +3O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ }[/tex]
Learn more about glucose here:
https://brainly.com/question/8394646?referrer=searchResults
Brass and bronze are both of copper because copper is the component in brass and bronze.
Answer:1 alloys 2 main
Explanation: Brass and bronze are both constructed from copper because copper is the main component in brass
In a solution, what term is given to the liquid?
Answer: solvent
solvent is A solvent is usually a liquid
Answer: Solvent
Explanation: Everything that dissolves in water and the things which dissolve are called solutes and the liquid in which they dissolve in is called a solvent to form a solution.
Transpiration is C. The evaporation of water out of the stomata of plants B. The absorption of water through the roots D. The evaportation of water out of the roots A. Simple diffusion
Answer: Option C.
The evaporation of water out of the stomata of plants
Explanation:
The evaporation of water out of the stomata of plants is transpiration because transpiration is the evaporation or loss of water inform of vapor from the stomata of leaves or flowers. Water is first absorbed by the root and it is moved to plant parts including leaves by xylem vessels since the roots already retained which it can use and when the water get to the leaves, it is loss inform of water vapor.
What is the frequency for a wave with a wavelength of 6.3x10^5
Answer:630000x
Explanation:
6.3x×100000
On the periodic table of elements, all the elements within group 14 have the same number of
Group 14 is the carbon family. The five members are carbon, silicon, germanium, tin, and lead. All of these elements have four electrons in their outermost energy level. Of the Group 14 elements, only carbon and silicon form bonds as nonmetals (sharing electrons covalently).
What kind of reaction is 2H202
>
2H20 + O2?
Answer: Disproportionation reaction
Explanation: A reaction where a compound undergoes oxidation as well as reduction. 2H2O2=2H2O + O2 here hydrogen peroxide is oxidized to oxygen and is reduced to water.
Answer: B (Decomposition)
Explanation: A P E X X X
Which compound in the picture has a central atom with four outside atoms and has at least one nonpolar bond.?
Answer:
The correct answer is option B, that is, methane.
Explanation:
In the given question, the compound in option B is methane. It is a compound that exhibits two elements, that is, hydrogen and carbon. It possesses a central atom, which is encircled by four atoms of hydrogen. The chemical formula for the compound is CH4.
The outer atoms in methane are dipoles and exhibits in the same orientation. This property of methane makes it completely a non-polar molecule. The compound itself is non-polar and exhibits non-polar bonds.
When is electrolysis used to extract metal?
Answer:
Explanation:
electrolysis is the technique that use direct current to drive a non spontaneous chemical reaction chemical reaction is the gain or lose of electron this technique is use to extract metal from theirs ores
The chemical name for common salt is
Sodium chloride
commonly known as salt, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. With molar masses of 22.99 and 35.45 g/mol respectively, 100 g of NaCl contains 39.34 g Na and 60.66 g Cl.
Answer:
Sodium chloride
Explanation:
that is the name and the formula is
NaCl
AS HEIGHT INCREASES SO DOES
Answer:
potential energy (im positive that its right)
Describe the motion of particles in a substance as thermal energy is added
Answer: it moves faster
Explanation:
When heat is added it gains thermal energy therefore it moves faster as things heat up and it loses thermal energy when it gets cooler causing particles to move slower
Which of the following correctly shows the flow of energy in a food chain
The direction of energy flow in simple food chain is always sun=> plants( producers)=> primary consumers=> secondary consumers=> tertiary consumers, than finally after death of an organism, to decomposers
The direction of energy flow in simple food chain is always sun=> plants( producers)=> primary consumers=> secondary consumers=> tertiary consumers.
What is food chain?The sequence of events within an ecosystem known as a "food chain" occurs when one live organism eats a different organism, which is then eaten by a larger organism. A food chain is created by the transfer of energy as well as nutrients from one creature to another at various trophic levels. A food web is comprised of numerous linked food chains.
The feeding habits or connections between living things are also explained by the food chain. Trophic level is the term used to describe the orderly phases in a food chain, from producers from the bottom through primary, secondary, and tertiary consumers. A trophic level is any position along a food chain. A food web and a food chain are similar, but a food web seems far bigger. The direction of energy flow in simple food chain is always sun=> plants( producers)=> primary consumers=> secondary consumers=> tertiary consumers.
Therefore, the direction of energy flow in simple food chain is always sun=> plants( producers)=> primary consumers=> secondary consumers=> tertiary consumers.
To know more about food chain, here:
https://brainly.com/question/17172730
#SPJ3
A 7.0 liter balloon at room temperature contains helium gas. if the temperature is halved, what happen to the volume?
The volume = 6.71 L
Further explanationCharles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
V₁=7 L
T₁=25 °C(room temperature) + 273 = 298 K
T₂=12.5(halved) + 273 = 285.5 K
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\\dfrac{7}{298}=\dfrac{V_2}{285.5}\\\\V_2=6.71~L[/tex]
3. What crime had James Kater been convicted of in 1969?
A. Sexual assault of a 15-year-old girl.
B. Theft of a 1976 Opel model green car.
C. Abduction and assault of a 13-year-old girl,
D. Second degree murder of a 18 year-old female.
Describe a gentle force?
Answer:
The word gentle traces back to the Latin word gentlis, meaning “of the same clan,” and at first the world was used to describe people belonging to distinguished families, who were seen as courteous and noble. Nowadays you’re more likely to hear the word used to refer to things that are calm, moderate, and without harshness. The word is often applied to people, but it can be used more broadly to describe anything that is mild, such as "a gentle detergent" or "a gentle reminder."
1 point
What would 140000000.0 be in scientific notation?
a. 1.4 x10-8
b. 1.4 x108
c. 14 x10-7
d. 14 x107
Answer:
B
Explanation:
you're moving the decimal 8 spots to the left so it can only be B
Which of the following would most likely cause a chemical reaction to occur at a slower rate?
Answer:
D
Explanation: When you chill a substance when it is mixed with another substance, ( chilled vinegar mixed with sodium bicarbonate will react slower for instance) it reacts slower do to the molecules slowing down when chilled.
[tex]\huge\boxed{Option D}[/tex]
Solution:a liquid mixture in which the the solute which is in a smaller proportion is uniformly distributed within the the solvent which is the major component is called a solution.
_____________________________________Option AStirring the substance together vigorously:It increases the rate of reaction, because when we stir the solute in the solution, the mixed solute particles are distributed more further than when they are left stationary, making the environment (which surrounds the solute) less concentrated by the dissolved solute thus the rate increases and more solute is mixed.
Option BDissolving the reacting substance in water:No, A reacting substances in water are those which can react with water that are Ionic metal. Water is made of ions [tex]H^+ and OH^-[/tex]. Substances(solute), they mix or dissolve more because Solutes ions interact with the ions of a water(solvent), thus breaking the bonds between the solute and then ions of solute form bond with the ions of water. Thus the rate increases in water.
Option CIncreasing the temperature increases the rate of reaction:No, because by the increase in temperature, the kinetic energy of more molecules of a substance increase which results in reaching the threshold energy(minimum energy required by the molecules to change into product) of more molecules. So less molecules are left with low energy.
Option DDecreasing the temperature decrease the rate of reaction.Yes, the rate of reaction decreases because the molecules are slower and collide less. Less molecules make the effective collisions due to which the kinetic energy of molecules is less, so less molecules make up to the threshold energy. So decrease in temperature lowers the rate of the reaction.
_____________________________________Best Regards,'Borz'What is the acceleration of a 200 gram ice cube if the
net force on the ice cube is 2 N?
Answer:
First answer is correct, please let me know if you need any help though!