Explanation:
2HCl+2Zn----> 2ZnCl+H2
Explanation:
HCL + Zn= zncl2 + H2
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Denise was driving east over a hill in the afternoon, shortly after a rain shower. Suddenly the sun broke through the clouds, and she saw a rainbow ahead of her. Which of the following made the rainbow possible?
Answer: A. Raindrops act like a prism and separate the white light in sunlight.
Explanation:
The reason for the formation of rainbow is option A. Raindrop acts like a prism and separate the white lite into different colors.
What is rainbow?Rainbow is an arc of colors from a white light ray which can be formed by the separation of component colors from white light by the combination of reflection, and refraction.
White light absorbs all colors and reflect all of them. That is why a white object is seen white the mix of all colors. When the white light passes through a raindrop, it gets refracted, the refracted light then reflects from the drop and undergo one more refraction and that make the component colors in the form a bent or arc.
Therefore, raindrop is acting like a prism to separate the white light into its component colors. Hence, option A is correct.
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.
Given the following equation: Na2O + H20 - 2 NaOH
How many grams of Na20 are required to produce 1.60 x 102
grams of NaOH?
g
Answer:
124g
Explanation:
The concept stoichiometry is used here to determine the mass of Na₂O. The grams of Na₂O required to produce 1.60 x 10² grams of NaOH is 124 g.
What is Stoichiometry?The stoichiometry is an important concept of chemistry which help us to use the balanced chemical equation to calculate the amounts of reactants and products. The stoichiometric coefficient is the number of molecules that can participate in the reaction.
The balanced equation is:
Na₂O + H₂O → 2NaOH
1 mole of Na₂O is required to react with 1 mole of H₂O to give 2 moles of NaOH.
62 g of Na₂O produces 80 g of NaOH.
1 g of NaOH is produced from 62/80 g of Na₂O .
1.6 × 10² g of NaOH will require 62 × 1.6 × 10² g / 80 g of Na₂O = 124 g Na₂O
Thus the grams of Na₂O required to produce 1.6 × 10² g of NaOH is 124 g.
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The monkeys at the zoo swing wildly from branch to branch.
Answer:
epic
Explanation:
hakuna matata
(b) in what way are carbon dioxide and orange juice similar?
Answer:
The effects of supercritical CO2 (SC-CO2) on the microbiological, sensory (taste, odour, and colour), nutritional (vitamin C content), and physical (cloud, total acidity, pH, and °Brix) qualities of orange juice were studied. The CO2 treatment was performed in a 1 litre capacity double-walled reactor equipped with a magnetic stirring system. Freshly extracted orange juice was treated with supercritical CO2, pasteurised at 90°C, or left untreated. There were no significant differences in the sensory attributes and physical qualities between the CO2 treated juice and freshly extracted juice. The CO2 treated juice retained 88% of its vitamin C, while the pasteurised juice was notably different from the fresh juice and preserved only 57% of its vitamin C content. After 8 weeks of storage at 4°C, there was no microbial growth in the CO2 treated juice.
20.What do carbon and silicon have in common?
a.They belong to the same column (family), therefore they have the same number of valence electrons.
b.They belong to the same column (family), therefore they have the same number of total electrons.
c.They belong to the same column (family), therefore they have the same number of energy levels.
d.They belong to the same column (family), therefore they have the samenumber of protons.
The carbon and silicon have in common that they belong to the same column (family), therefore they have the same number of total electrons. So, option B is correct.
What do carbon and silicon have in common?Carbon's closest analogue is silicon. Silicon and carbon are both tetravalent atoms that primarily form covalent (non-ionic) compounds. However, aside from the fact that both elements "can form four covalent bonds," there is surprisingly little in common between them.
Carbon has an atomic number of 6 and an electronic configuration of 2, 4. Silicon has an atomic number of 14 and an electronic configuration of 2, 8, 4. Because both elements have the same number of valence electrons, they are classified as being in the same group.
Thus, option B is correct.
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please help... will give brainiest
Answer:
The answer will be ：
In year 1869
Russian scientist named Dmitri Mendeleev
Chart called Mendeeleves periodic table
increasing atomic masses
physical and chemical properties.
Hope this Helps
Best of luck ！！
Each cell in an organism contains a set of hereditary information that gets passed from one generation to the next. The genes in all organisms contain instructions needed to make offspring. Which statement describes
heredity in animals?
A Offspring show recessive traits only.
B Offspring receive genetic traits from a single parent only.
C Offspring receive genes with traits that are always physically observable.
D Offspring receive genes from each parent, which contribute to the traits in the offspring.
please help
Answer:
D
Explanation:
Offspring receive genes from both parents, they don't always have a recessive or dominant train but if they do have a dominant trait, it will always show while the recessive will only show if there is no dominant trait. For example: DD, Dr, and rr (D= dominant r = recessive)
Answer:D
Explanation:
i did this one too and it’s right
does liquid evaporate with adding heat or losing it
Cu2O + C->
Cu + CO2
Balance the above reaction by writing in the correct coefficient.
Answer:
2 Cu2O + C = 4 Cu + CO2
Explanation:
CU2O has 2 coefficient
C has 1 coefficient
Cu has 4 coefficient
CO2 has 1 coefficient
Balance Equation 2 Cu2O + C = 4 Cu + CO2
Answer:
2CU2O + C -----> 2Cu + CO2
Explanation:
2 is added in reactants to balance oxygen O on both sides and 2 before Cu is added in products to balance Cu on both sides.
The melting point of oxygen is -218°C and its boiling point is -183°C. What is the state of oxygen at -200°C?Immersive Reader
it is in a liquid state
Explanation:
meantion the two groups of mineralsalts and their two examples (each)
Answer:
sodium example salt and soy sauce
potassium example meat milk fresh fruits
The water cycle describes the movement of water on Earth. Water in oceans and lakes evaporates and turns into water vapor. This water vapor condenses and forms clouds which produce precipitation. Precipitation falls all over the Earth's surface. The water eventually comes back to the oceans through run-off. Which steps in the water cycle carry water out of an ocean and into a freshwater lake?
A. Evaporation and precipitation
B. Rivers and streams
C. Underground tunnels
D. Condensation and run-off
Answer:
c. Underground tunnels
Explanation:
Yes, water below your feet is moving all the time, but, no, if you have heard there are rivers flowing below ground, that is not true. Water moves underground downward and sideways, in great quantities, due to gravity and pressure. Eventually it emerges back to the land surface, into rivers, and into the oceans to keep the water cycle going.
Note: This section of the Water Science School discusses the Earth's "natural" water cycle without human interference.
The steps in the water cycle that carries water out of the ocean into a freshwater lake are rivers and streams.
What is the water cycle?The water cycle is used to describe the movement of water in the ecosystem. It involves the various processes through which water can move in the universe.
The steps in the water cycle that carries water out of the ocean into a freshwater lake are rivers and streams.
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How many carbon (C) atoms are in CaCo3?
Answer:
Calcium carbonate is a molecule that contains one atom of calcium, one atom of carbon, and three atoms of oxygen.
:)
Answer:
i thinks its one carbon atom
Explanation:
What is the boiling point of water?
A. 0°C
B. 50°C
C. 70°C
D. 100°C
Answer:
D) 100*C
Explanation:
Answer:
A. 0°C
Explanation:
El agua se evapora a los 0 grados
As stated in the article, “As Sticky as a Gecko . . . but Ten Times Stronger!,” the adhesive the researchers developed sticks best when it is pulled down parallel to the surface. What type of adhesion is this called?
The answer is Shear Adhesion, i just took the test on 21 edge.
Answer:
shear adhesion
Explanation:
edge
Shear adhesion sticks best when it is pulled down parallel to the surface.
What is shear adhesion?Shear adhesion is defined as the ability of tape due to which it resists the static forces which are applied in same plane as in backing.It is usually expressed in terms of time required by a given weight for an amount of tape to become loose from a vertical plane.
Molecular weight between two entanglements is the controlling factor of shear adhesion. Shear adhesion is affected by the following parameters which areas follows:
1)Tg of adhesive - Shear adhesion increases as Tg rises up to a certain temperature which is less than the room temperature.
2) Tan delta minimum value of adhesive- It is found that shear adhesion improves by an increase in tan delta minimum value.
3)Adhesive polarity- It is an important factor which affects adhesion such as tack,peel and shear.Adhesion performances are improved by introducing polar ingredients in the formulation.
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The purpose of meiosis is to produce
A. Sex cells
B. Body cells
C. DNA
Answer:
A)sex cells
Explanation:
it’s the production of gametes, or sperm and eggs
5. What is the mass of 5.502 mol CaCl,?
Answer:
415.401g
Explanation:
1 mol of CaCl = 75.5g
5.502mol of CaCl = xg
so 5.502 × 75.5 = 415.401g
Given three (3.00) moles of gold (Au), how many grams do you have?
a. 66 g
b. 197 g
C. 591 g
d. 6.02 x 1023 g
What feature of the sun changes to create the solar cycle?
a
Brightness
Hydrogen gas
Nuclear fusion
Magnetic field
1. X-linked (also called sex-linked traits) are inherited on the _____ chromosome.
Answer:
Genes on the X chromosome are said to be X-linked. X-linked genes have distinctive inheritance patterns because they are present in different numbers in females (XX) and males (XY). X-linked human genetic disorders are much more common in males than in females due to the X-linked inheritance pattern.
Explanation:
Please help with this question!
Answer:
The answer is 1:1
Explanation:
Oxygen has 8 positively charged protons what is the number of negatively charged electrons in an atom of oxygen?
Answer:
8 electrons (e-)
Explanation:
In the atom of every elements, there are three sub-atomic particles namely: protons, electrons, and neutrons. The protons are the positively charged particles, the electrons are negatively charged while the neutrons are neutrally charged.
In an uncharged or neutral atom i.e. charge 0, the number of protons is always equal to the number of electrons because they cancel each other out. When a difference occurs in the number of these particles, the atom becomes charged i.e. an ion. According to this question, oxygen atom (O) contains 8 positively charged protons, this means that it also contains 8 negatively charged electrons in its atom.
HELP PLS PLS PLSSSS
Energy is converted from kinetic energy to potential energy when you
ski down a hill.
climb a mountain.
run around a track.
sit at a desk in physics class
Answer:
CLIMB A MOUTAIN
Explanation:
B
6. What are formed from the chemical reaction of the substances given
below? Write the balanced chemical reaction as well.
a) when calcium carbonate and hydrochloric acid react with eachother
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)
What is the correct IUPAC name for CuNO₃?
Answer:
Copper(i) nitrate
Explanation:
That is the correct name.
Answer:
Molecular Formula
Explanation:
What is the VSEPR shape of BHI2?
a.) bent
b.) trigonal planar
c.) trigonal pyramidal
d.) tetrahedral
e.) linear
Answer:
The answer is B
Explanation:
honestly do
which form of molecular motion do liquids experience?
A translation,rotational,& vibrational
B vibrational and rotational
C translational and rotational
D transitional only
Answer:
I'm pretty sure that liquid moves by vibration
Explanation:
I asked my cousin
is there a relationship between the relative age of stars in the number/identity of element is found within them
Yes. Stars use fusion to create nuclear energy, which is what makes them "alive". The older they are, the "bigger" the element in them is. Hydrogen turns into Helium, and when hydrogen is used up, the helium starts fusing into bigger elements. it stops at iron however. Once stars start fusing silicon to iron, it is doomed because it takes more energy than it gives off.
PLS HELP *10 POINTS* I WILL GIVE BRAINLIEST
Answer:
Eurkaryote... sorry if i wrong
Explanation:
AHHH I need help ASAP what does TAILS stand for in science??