Answer:
Explanation:
The exponent is negative because water molecules are absolutely tiny. You can't see a molecule of water on the palm of your hand with your naked eyes, right? If a the mass of a molecule was 1.50 x 10^24, it'd be HUGE... like absolutely massive (possible the size of your city). Molecules are just tiny, tiny particles
HELP WITH THIS WORD PROBLEMStudents want to gather evidence for the claim that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction. They decide to react vinegar and baking soda in a sealed plastic bag. Which of the following would provide the evidence the students need?
The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.
Bubbles were produced during the reaction, which meant that a gas was being produced
.The plastic bag did not change in any way, indicating that it was not involved in the reaction.
The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.
How many oxygen molecules are in this compound: H2O
Answer:
1 oxygen molecule is present in H₂O
Explanation:
How to find out?
There's a 2 beside H in H₂O showing that there are '2 atoms of hydrogen'
However there's no number to the right of Oxygen, so it is just 1.
15. What is the molar mass of H2CO3?
(atomic mass: C = 12.01, H = 1.01, 0 = 15.99)
Answer:
62.00
Explanation:
H2 means that there are two moles of hydrogen so multiply the atomic mass by two (1.01 × 2 = 2.02)
C only has one mole sp leave 12.01 alone
And multiply oxygen by 3 because there are three moles of oxygen (15.99 × 3 = 47.97)
Add them all together!
2.02 + 12.01 + 47.97 = 62.00 for molar mass
Calculate the change in heat (Q) that occurs when 7.58grams of steam at 101°C cools to liquid water at 40°C. (cp = 4.184 J/g°C)
Answer:
Q = 19065.4 J
Explanation:
Q₁ = the required energy for phase change of H₂O from vapor to liquid
Q₁ = mass of H₂O * heat of vaporization
Q₁ = 7.58 g * 2260 J/g
Q₁ = 17130.8 J
Q₂ = energy required to cool the water fro 101°C to 40°C
Q₂ = mass of H₂O * specific heat of H₂O * ΔT
Q₂ = 7.58 × (4.184 J/gC) × (101 - 40)
Q₂ = 1934.6 J
Q = Q₁ + Q₂
Q = (17130.8 + 1934.6) J
Q = 19065.4 J
WILD GUESS
OUT OF BAKUGOU SHOTO AND DEKU
GUESS WITCH ONE I SIMP FOR
Answer: all of them?
Explanation:
Answer:
Deku.
Explanation:
True or False: Tsunamis always look like a towering wall of water approaching the beach.
Answer:
false
Explanation:
Answer:
True
Explanation:
they can get up to several hundreds of feet.
What is the answer?
Answer:
Option A
Explanation:
The atomic number is the number of protons in the nucleus of an atom.
HELP PLEASE ||Suppose you add water to a 6 g of sugar to make a solution with a concentration of 3 g/L. What is the total volume of the solution?
Answer:
2 L
Explanation:
Divide the mass by the concentration to find the volume.
(6 g)/(3g/L) = 2 L
According to the concept of solubility, in order to make solution of sugar the total volume of solution is 2 g/L.
What is solubility?Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
In order to calculate total volume of solution divide mass/ concentration that is 6/3=2 g/L.
Thus, the total volume of the solution is 2 g/L.
Learn more about solubility,here:
https://brainly.com/question/29589228
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Human body cells are made by doing what ?
Answer:
When cells become damaged or die the body makes new cells to replace them. This process is called cell division. One cell doubles by dividing into two. Two cells become four and so on.
Explanation:
Look at the dots around each symbol and the energy levels from the resources above;
Answer the questions in the text entry option for this assignment.
Copy and paste questions and respond in complete sentences.
Include a space between each question.
Be specific with your responses for each question. Assume your reader has no knowledge of the subject and you are teaching them via your answers.
Please answer the following questions:
Why does Na have only one dot?
Why do none of these diagrams show more than 8 dots?
What relationship do you notice between the dots in these two charts?
The number of dots that hydrogen and helium have in their dot diagram is the same as the number of electrons shown for them on the Periodic Table. Why? (Hint: Octet Rule (Links to an external site.))
Hello! Here's the answer I was able to come up with:
Why does Na have only one dot?
Sodium, or Na, has only one valence electron. (This makes the atom tend to participate in ionic bonding and "give" its single valence electron to an atom like chlorine.)
Why do none of these diagrams show more than 8 dots?
It is physically impossible for an atom to have more than 8 electrons in its valence layer, according to the Octet Rule.
What relationship do you notice between the dots in these two charts?
The dot diagram for each element represents the number of electrons each element will have in its outermost, or valence, shell. (2-8-8)
The number of dots that hydrogen and helium have in their dot diagram is the same as the number of electrons shown for them on the Periodic Table. Why?
An atom can have a maximum of two electrons in its innermost layer. Hydrogen and helium have only one and two electrons, respectively, so they don't have enough electrons to actually have more than one layer. Therefore, their outermost layer is, in fact, their only layer. This is why the number of dots that hydrogen and helium have in their dot diagram is the same as the number of electrons shown for them on the Periodic Table.
Don't copy this word for word! You will most likely be in trouble for plagiarism. Instead, rewrite these ideas in your own words, or paraphrase. Good luck, and I know you can do it! ♥
How are igneous and sedimentary rocks similar? A.They are both formed by erosion. B.They are both formed from cooled lava. C.Heat and pressure can turn them into lava. D.Heat and pressure can turn them into metamorphic rock.
Answer:
D
Explanation:
I learned this last year.
2A → B + C The above reaction is run and it is found that a plot of the natural log of the concentration versus time is linear. This indicates that the reaction is ...
Answer:
zero order reaction
Explanation:
The seem to be a reaction is zero order as the data only fits to zero order integrated rate law.
Integrated rate law:
[A] = [A]_0 – kt
Here y = [ A] and slope is -k , so when we plot concentration of A with respect to t then we get the equation in the form of line
y = mx + c
So the answer Zero order in [A]
write the electronic configuration of an Na+ and CL-1
Answer:
Na+ lost one electron: 1s2 2s2 2p6
Cl- gained an electron: 1s2 2s2 2p6 3s2 3p6
Explanation:
Transferring charge by touching or rubbing is called-
A) charging by contact
B) convection
C) insulation
D) none of these
Answer:
A) Charging by contact
Explanation:
Transfer of heat by direct contact, Heat energy is conducted from the hotter medium to the cooler medium
which horizon has the least weathered rocks? How do you know?
Answer:
C: The C horizon is a subsurface horizon. It is the least weathered horizon. Also known as the saprolite, it is unconsolidated, loose parent material. The master horizons may be followed by a subscript to make further distinctions between differences within one master horizon.
Explanation: