Answer:
protons are positively charged (+1) neutrons have no charge (0) electrons are negatively charged (-1)
could you help answer these two question
Answer:
number 29 is D
Explanation: When the moon orbits the earth some of the light reflects off the moon, making it visible on the Earth.
I dont know how to answer 28 fully, is there a picture?
whats valency of nitrogen in N2O3, N2O5 and NO
Answer:
Valency of nitrogen in the given compounds:
N₂O₃ = +3
N₂O₅ = +5
NO = +2
-TheUnknownScientist 72
A student carries out this experiment using 32.0 g of sulfur powder. This produces 88.0 g of iron sulfide. What mass of iron filings did the student react? *
Please justify your answer as well
Answer:
He answered abou 5g of mass
Explanation:
covalent bond of N and S
Answer:
Covalent bond between identical atoms
Covalent bonds occur between identical atoms or between different atoms whose difference in electronegativity is insufficient to allow transfer of electrons to form ions. ... The two hydrogen atoms are attracted to the same pair of electrons in the covalent bond.
how many elements belong to the alkali metal family
Answer:
six
Explanation:
check your periodic table
Carbon monoxide (CO), carbon dioxide (CO2) and nitrogen dioxide (NO2) are low molecular weight covalent compounds. Which of the following best describes the state in which these compounds exist at Standard Temperature and Pressure (STP)?
solid
liquid
gas
plasma
Answer:
gas
Explanation:
at Standard Temperature and Pressure Carbon monoxide (CO), carbon dioxide (CO2) and nitrogen dioxide (NO2) exist as gases
Option C is correct
Low molecular weight covalent compoundsCovalent compounds are compounds that are characterized by strong Intra-molecular bonds and they are solids as they have higher molecular weights
But when compounds like Carbon monoxide (CO), carbon dioxide (CO2), and nitrogen dioxide (NO2) are formed with low molecular weight covalent bonds They exist as gases
More on Compound
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In making a pizza, which process involves a chemical
change?
o mixing spices for the sauce
o slicing pepperoni for the topping
o spreading cheese on the pizza
o baking the dough to form the crust
Answer:
baking the dough to form the crust
In making a pizza, the process that involves a chemical change is baking the dough to form the crust.
What is chemical change?Chemical changes occur when a substance combines with another to form an entirely new substance.
During a chemical change there is a formation of an entirely new product different from the original product.
Thus, In making a pizza, the process that involves a chemical change is baking the dough to form the crust.
Learn more about chemical change here: https://brainly.com/question/1222323
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I need help with this
Answer:
129 units cubed
Explanation:
There are ten spaces between 120 and 130, so we can infer that each line represents a change in volume of 1 unit. The volume of the substance in the graduated cylinder looks like it's 1 under 130, so its volume is 129 units.
Hopefully this was helpful! :)
Which of the cells is flat and protects you?
Answer:
Skin cells are flat and protect you!
Explanation:
Answer:
Epithelial cells are the safety shields of the body. Take another look at your hand. It is covered with epithelial cells that protect your body by being a barrier between your internal cells and the dirt and microbes in the environment.
I need help with this
How does the structure of a leaf help in photosynthesis?
Answer:
Leaves have a large surface area so more light hits them. The upper epidermis of the leaf is transparent, allowing light to enter the leaf. The palisade cells contain many chloroplasts which allow light to be converted into energy by the leaf
Answer:
The main function of a leaf is to produce food for the plant by photosynthesis. Chlorophyll, the substance that gives plants their characteristic green colour, absorbs light energy. The internal structure of the leaf is protected by the leaf epidermis, which is continuous with the stem epidermis.
Explanation:
Why are being flammable and combustible considered to be chemical properties and not physical properties?
A. They alter its mass and volume
B. They change the state of matter
C. They change the substance into another substance
D. They change the color of the substance
Answer:
C. They change the substance into another substance.
Explanation:
Hope it helps!!
In a compound, chemical energy is _______________ when bonds break.
Answer:
In a compound, chemical energy is _____required__________ when bonds break.
Eye color is mostly caused by ?
Answer:
Genes
Explanation:
Eye color is a genetic feature given to a child by the parents.
rays with short wavelengths that are the least penetrating, produce chemical effects, and kill germs are
Answer:ultraviolet rays
Explanation:
Ethanoic acid is a weak acid because
Is a carboxylic acid
Does not irritate the skin
Is not completely ionized in water
Produces one hydrogen ion per molecule
Answer:
is not completely ionized in water
The ethanoic acid (acetic acid) is considered as a weak acid because it does not releases all of its hydrogen in water, rather it dissociates partially and establishes an equilibrium with its conjugate base.
The temperature of a gas is increased. Which statement best explains the effect that this has on the motion of gas
particles?
Answer:
The average kinetic energy increases, and the particles collide more frequently.
Explanation:
Which of the following is matter in its solid form?
O Air
O Electricity
O Rock
O Water
Which item is a good example of potential energy?
A thrown baseball
O Electricity
O A rock
A battery
2) Why is nuclear fusion of interest today?
Answer: Nuclear fusion is of interest today, because it represents a clean source of energy without radioactive contamination.
Explanation: I think so
A general electron dot formula of a molecular compound is shown below.
A
:B:A
A
In this formula, A and B represent elements but are not actual symbols for elements. Which element(s) can A represent?
а
Any element in Group 2A
b
Hydrogen only
c
Any element in Group 7A
d
Helium only
Looking at the Lewis dot structure as shown, A is most likely hydrogen.
An ionic bond is formed between metals and nonmetals. The metal transfers electrons to nonmetals. The number of atoms involved in the bond depends on the respective valencies of the elements involved. Covalent bonds are formed by sharing electrons between atoms.
Given the general Lewis dot structure for the compound is A :B:A. We can see from the Lewis structure that A will most likely be hydrogen.
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how do ion-ion bonds, ion-dipole bonds and van der wall forces affect boiling or melting of substances?
What is helium an example of?
element
compound
atomic number
subatomic particle
Answer:I believe it is Subatomic Particle.
Determine the mass of 10g of CaCO3
Answer:
= 100u. Hence 10 g = 0.1 mole. Hope it's helpful to u
tijuan mixed a solid and a liquid together in a beaker
Which one of the following is a measure of the certainty of a
result comparing to a given value or the agreement of
measurements?
a. Accuracy
b. precision
c. Percentage
d. Uncertainty
Answer: a. Accuracy how close is your measurement tot the true value
Explanation:
Which one of the following is a measure of the certainty of a
result comparing to a given value or the agreement of
measurements?
a. Accuracy how close is your measurement tot the true value
b. precision; how close are yourr measurements to each other
c. Percentage: the ratio of tour measurement to the true value X 100
d. Uncertainty: how unsure are you of your measurements
The number 1x10^100 is called a googol. Write the number 50 googols in standard form.
Answer:
Explanation:
50 * 10^100 is 50 googols in scientific notation... but
come on, who would write that in standard form...
assuming that no heat is lost to the surroundings, what is the final temperature of the mixture?
Where does the energy of a hurricane come from? (1 point)
O the Sun
O strong winds
O Earth's spin
O Earth's moon
Answer:
strong winds come from the energy of a hurricane
The energy of a hurricane come from strong wind. The Taino Native American term hurricane, which translates to "bad spirit of the wind," is where the word hurricane originates.
What is hurricane ?A tropical storm that has sustained winds of 74 mph or greater is referred regarded as a hurricane. A storm's eye typically measures 20 to 30 miles in width and can reach distances of 400 miles. Storms can be dangerous because of their torrential downpours, strong gusts, and storm surges.
When warm, humid air begins to rise over water, hurricanes emerge. Cooler air replaces the rising air. Large clouds and thunderstorms continue to grow as a result of this process. Thanks to the earth's Coriolis Effect, these thunderstorms are still expanding and starting to rotate.
Thus, option B is correct.
To learn more about hurricane refer the link below;
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Drug addiction occurs in
age groups, from a
variety of backgrounds.
A young, narrow
B. all, narrow
C. all, wide
Answer:
A. young, narrow
Explanation:
Correct me if I am wrong
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