Answer:
2 K(s) + Cl₂ (g) --> 2 KCl(s)
Explanation:
Potassium will just be K
Chlorine gas is part of BrIClHOF, which are diatomic gasses. So Cl₂
Looking at the periodic table potassium K has an ion charge of +1 and chlorine Cl has an ion charge of -1, so in a balanced compound they will be written as KCl
Balancing the amounts of each will lead to 2 K(s) + Cl₂ (g) --> 2 KCl(s)
DESPERATE WILL GIVE BRAINLIST AND THAKS
Which phrase describes how vestigial structures provide evidence that suggests a common ancestor and supports that life changes over time?
Question 3 options:
some animals exhibit similar structures, possibly due to a common ancestor
some animals exhibit similar stages of embryonic development
some animals exhibit structures that are no longer used for any purpose
some fossils exhibit similar biological proteins
Answer:
some animals exhibit structures that are no longer used for any purpose
Explanation:
Vestigial structures are defined as the the organs which are no longer used for any purpose.
Vestigial structures provide evidences of common ancestors as they shows how organisms changed or evolved in the use of these structures. for example: human appendix which is no longer functional in human body but as per Darwin's theory of evolution it was once used by our herbivorous ancestors to protect good bacteria in the gut.
Hence, the correct answer is "some animals exhibit structures that are no longer used for any purpose".
True or false Compounds link up to make elements
Answer:
false
compound are formed from elements .
Air that is less dense ______, while air that is more dense ______.
Air that is less dense Speeds up, while air that is more dense Slows Down.
(please mark brainiest I need for new rank)
Determine the empirical formula of the compound with the percent composition of 26.6% K, 35.3% Cr and 33.0% O. *
3 points
Answer:
KCrO₃
Explanation:
26.6% K, 35.3% Cr and 33.0% O
The steps in obtaining the empirical formulae from percentage composition is given as;
Step 1:
Divide the percentage composition by the atomic mass of the elements
K = 26.6 / 39.0983 = 0.6803
Cr = 35.3 / 51.9961 = 0.6789
O = 33.0 / 16 = 2.0625
Step 2:
Divide all though by the smallest number (0.6789)
K = 0.6803 / 0.6789 = 1.002
Cr = 0.6789 / 0.6789 = 1
O = 2.0625 / 0.6789 = 3.038
The Empirical formular is the ratio between the elements. This given as;
KCrO₃
What are the similarities between a phylogenetic trees and cladograms.
Answer: A phylogenetic tree is an evolutionary tree that shows the evolutionary relationships between different groups of animals, Cladograms give a hypothetical picture of the actual evolutionary history of the organisms
Explanation: Hope this helps you out :)
Hi all!
This is the 2nd one pls help me, its easy.....
Thanks
Answer:
7. Concave and convex mirrors are called spherical mirrors because they are both made from the sphere. The difference between the two (in the simplest terms) is that diminished images form in convex mirrors while enlarged images form in concave mirrors.
8. The word ambulance is written inverted on an ambulance is because when a driver is driving and sees an ambulance in their rearview mirror, they can see the word ambulance the correct way. Otherwise the word ambulance would be backwards in the mirror. Thats why they write it backwards.
9. A plane mirror forms the image, object, etc, the same exact size that it is. The mirror can be small or large the size of the image will stay the same. So the difference between the object in a small and large plane mirror is none, there is no difference.
10. Car rearview mirrors are curved. This is to give a wider viewing angle. Flat surface mirrors give an accurate reflection. since the rearview mirrors are not flat, they are curved, they are less accurate, so thats why they have a warning label.
11. The sun emits the color of white. And as we know the color white consists of all colors. We can test this by putting the sunlight through a prism. since different colors of light travels at different speeds in the glass we cand see the light 'bent' .
12. Solar cookers use concave mirrors. This is because the mirror reflects the sunlight to a focal, 'center,' point. This center point will eventually heat up very, very hot.
If you have any questions feel free to ask - mark
How many total elements are in this compound H2SO4
Answer:
grgrrgrgrgrg
Explanation:
Answer:
2 hydrogen
2 sulphate
8 oxygen
1CaC2 + 2O2 ---> 1Ca+2CO2
I need the mole to mole ratio.
Would fire extinguishers that produce Carbon Dioxide (CO) gas be more effective in
fighting ground fires or ceiling fires? Explain.
Answer:
They would be more efficient in ground fires since carbon dioxide is much greater in mass then oxygen, so its affected by gravity .
Explanation:
Glucose is produced through the process of photosynthesis
and is shown below. How many atoms of hydrogen are
present in one molecule of glucose?
6
3
12
24
As shown in the picture, the chemical formula for glucose is C6H12O6. This means that there are 6 carbons, 12 hydrogens and 6 oxygens in one molecule of glucose.
Your Answer: 12
Chemistry question please help
Answer:
a) the tendency to form hard, brittle crystals.
Explanation:
Metallic bonding occurs between metals; metals are excellent conductors of electricity, are malleable (can be hammered into thin sheets) and have luster (are shiny). Brittleness is indicative of an ionic bond or ionic compound.
Is the bond C=O polar or non polar
Answer:
Non Polar
Explanation:
Non Polar molecule because of its linear symmetric shape
If each image represents one mole of the substance pictured, which contains the greatest
amount of substance?
A)molecules
B) atoms
C)formula units
D)none; all amounts are the same
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, all amounts are the same. The correct option is option D.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Calculating the amount of a chemical in grams from moles is among the most often chemistry computations. You will employ the mole ratio of reactants to reagents when balancing equations.
Therefore, all amounts are the same. The correct option is option D.
.To know more about mole, here:
https://brainly.com/question/15209553
#SPJ2
How many water molecules are in 5.2 moles of H20?
Answer: There are therefore 6.02 × 1023 water molecules in a mole of water molecules.
Explanation: Hope this helps
True or false: All heterotrophs are omnivores.
Answer:
False. They can be both omnivores and carnivores.
an artificial reef is intended to affect the ocean ecosystem by-
Answer: B
Explanation:
i did the test
Silver is a metal; it reacts with oxygen which is a non-metal to form Silver Oxide. The bond between Silver and Oxygen is called
(Related to Science)
The kinetic molecular theory, explains how particles in matter behave.
True
False
Answer:
true
Explanation:it is hard to explan
Can someone help me Balance chemical equations please
Which substance would be the strongest?
carbon
steel
gold
silver
Answer:
steel
Explanation:
Answer:
B. STEEL
Explanation:
what happens when bromine water is added to ethane and ethene
Answer:
Bromine water reacts with ethane as it is able to break open the double bond, forming 1,2-dibromoethane. This double bond is not present in ethane, so bromine water does not react with it. This reaction is known as electrophilic addition.
Explanation:
Ethene will readily react with bromine, so the colour of the bromine water changes from red-brown to colourless. Bromine atoms will add across the double bond in ethene to produce just one product; 1,2-dibromoethane.
I really like chemistry but no barely anything about it so could you tell me something about it please
Answer:
2 hydrogen atoms and one oxygen atoms make h2o/water
Does sanitizer conduct electricity
Answer:
Yes, since it has alcohol, it conducts electricity.
Brainliest to right answer
what are the chemical properties of acids
Answer:
Acids are sour in taste. Acids react with carbonates and hydrogen carbonates to form a salt, water, and carbon dioxide gas. Extremely active metals such as Potassium (K), Calcium (Ca), Sodium (Na), etc tend to explode when combined with acids. Weak Acids like Carbonic Acid doesn't act with any metal at all.
I copied and pasted
but I hope the info helps
Please help me with this question tyy
Oh sheesh girl.. this is tricky.. but I can try:)
Between the chemical reaction of the chemicals and the label on the bottle the ions from in the radioactive product contained in the bottle separates the label from the surface. Im guessing that due to the "radioactive waste" in the bottle that there are components of thermal heat, that may also have an effect on the "label". So when talking about the reaction we have a chemical and thermal reaction happening.
I tried... and im sorry if it dosen't make sense... +_=||
have a wonderful day :)
Which terms correctly identify the indicated structures in this sketch of a cell viewed under a microscope? Match each label to the correct cell part. Question 5 options: Golgi Apparatus Nucleus Endoplasmic Reticulum Mitochodrion Ribosome Lysosome
1.
2.
3.
4.
5.
6.
Answer:
Hello I saw you guys were having trouble please put me as the brainiest
Explanation:
1. Golgi Apparatus
2. Nucleus
3. Endoplasmic Reticulum
4. Mitochondrion
5. Ribosome
6. Lysosome
Calculate the number of moles that are in 2.0 L of a 0.75 M solutions of NaCl
Answer:
1.5
Explanation:
0.75M=Moles/2L
PLEASE HELP: 60 POINTS
Select all that apply!
The emission of a Beta particle has the effect of:
a change in mass of an electron emitted from the nucleus
decreasing mass by one unit
increasing mass by one unit
adding a proton to the nucleus
converting 1 neutron to 1 electron and 1 proton
Answer:
all of they above
Explanation:
Help pwease!!!!!!!!!!!!!!!
Answer:
B
Explanation:
I think its water desposits clay in thick , flat layers because the way how a clay feels.