Answer:
the applied force is less than the force of friction.
Explanation:
proton is not affected by a magnet true or false
Answer:
true
Explanation:
negatively charged electrons are affected by the magnetic field.
Answer:
false
Explanation:
It isn't affected because nothing makes it change and the number stays the same
Give the brainliest
Classify the following metals by increasing order of melting temperature
a) Na Li K
Classify the following metals by increasing order of melting temperature
b) Al Mg Na
Explanation:
a. K Na Li
melting point decreases a
down the group since more shells are added down the group hence the the attractive force that the protons exert on the electrons decreases down the group and hence melting point also decreases down the group.
i.e Li,Na,K decreasing order.
And hence the increasing order will be:
K Na Li.
b. Na Mg Al
Effective nuclear charge increases across the period and hence melting point increases across the period since Al Mg and Na are in the same period hence the increasing order will be Na Mg Al.
Answer:
a. K,Na,Li
b. Na,Mg,Al
Explanation:
the first one Lithium because it has small atomic size hence their is greater attraction for the electrons in the energy level ,hence the heat required to break the bond is a lot hence high melting point
the second one Aluminium has a higher mpt than Mg and Na this is because as u go along the period the nuclear charge increases hence exerts higher attraction towards the electrons in the energy levels hence the bond formed is strong hence will require more heat to break.
A solid is that form of matter that possesses the following characteristics??
Which description refers to cumulus clouds?
are fluffy
form layers
are usually gray
cover most of the sky
Answer:
Are fluffy.
Explanation:
Cumulus clouds are clouds which have flat bases and are often described as "puffy", "cotton-like" or "fluffy" in appearance. Their name derives from the Latin cumulo-, meaning heap or pile. ... Cumulus clouds may appear by themselves, in lines, or in clusters.
Alkanes are hydrocarbons that contain
a.
single covalent bonds only.
c.
carbon and oxygen only.
b.
single or double covalent bonds.
d.
carbon, hydrogen, and oxygen.
Please select the best answer from the choices provided
A
B
C
D
Please hurry!!!
Answer:
single or double covalent bonds
Explanation:
define avagrados law
which of the following are the three states of matter. A animals, plants and stars B earth, wind and fire C solid liquid and fire D liquid, gas and solid
Answer:
D
Explanation:
Solid , Liquid and Gas
Answer:
D. liquid, gas, and solid
Hope I helped!
Explanation:
What do you think will happen to the speed of the molecules if a gas is heated?
can someone go answer my qeastion please this is what it looks like
Answer:
C
Explanation: i hope this helps plz tell me if its wrong so i can fix it :)
What happens to the mass of substances that go through a chemical reaction?
Answer:
In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction.
Explanation:
Calculate the quantity of heat in joules required to completely vaporize 100 grams of H2O() at 100.°C and 1.0 atm.
The quantity of heat : 226,000 J
Further explanationHeat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
Also can be formulated :Q = m. Hf
Hf = heat of fusion
Heat required for vaporize /evaporated can be calculated from
Q = m . Hv
m = mass, g
Hv = the heat of vaporization, for water = 2,260 J/g
So :
[tex]\tt Q=100\times 2,260=226,000 J[/tex]
What important piece of information should a sketch include in addition to the numeric dimensions?
Answer:
Bill of materials
Explanation:
hi pargol hehscshHsshsvbssjksgsgsbssjgdbsnshed
Answer:
Hola
Explanation:
which of the following elements has the greatest atomic radius?
A. potassium (K)
B. arsenic (As)
C. bromine (Br)
D. calcium (Ca)
Answer:
A. Potassium (K)
Explanation:
The trend of atomic radius goes:
As group number increases, radius decreases
As period number increases, radius increases
Answer:
francium
Explanation:
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
How many grams of hydrogen (H2) form in this reaction, according to this balanced equation?
2A1. + 6HCl -> 2AlCl3 + 3h2
53.96 g 218.76 g 266.66 g ?
A. 101.86 grams
B. 6.06 grams
C. 2.02 grams
D. 539.38 grams
Answer:
B = 6.06 g
Explanation:
Chemical equation:
2Al + 6HCl → 2AlCl₃ + 3H₂
In given balance chemical equation there are 3 moles of hydrogen are formed.
Mass of hydrogen in gram:
Formula:
Number of moles = mass/molar mass
Mass = number of moles × molar mass
Molar mass of hydrogen = 1.008×2 = 2.016 g/mol
Mass = 2.016 g/mol× 3 mol
Mass = 6.05 g
It is almost equal to 6.06 g thus option B is correct.
Answer: 6.06
Explanation:
Sarah backstrokes at a speed of 8 meters per second, how long will it take her to complete the race of 200 meters length?
Answer:
I think it would take her 25 Seconds
Explanation:
To calculate how long it would take for Sarah, I did 200 divided by 8. When I did that, I got 25 as my answer. I'm not exactly sure if it would be in seconds or minutes, but I feel that seconds is more reasonable. I hope this helps, and I hope it's not wrong, but I do not think it is.
Which phrases describe sedimentary rock
sedimentary rocks are rocks that are combined from other rocks pressed into one.
In general, how many valence electrons do transition metals have? (Valence are highest n, only s and p sublevel)
What ion is likely to form with transition metals? Speculate as to why you think some transition metals can form multiple ions?
Answer:
2 valence electrons.
Explanation:
Valence electrons are the sum total of all the electrons in the highest energy level (principal quantum number n). Most transition metals have an electron configuration that is
n
s
2
(
n
−
1
)
d
, so those
n
s
2
electrons are the valence electrons
pleaseeee helpp its a HW question
will mark brainliest!!
A container of nitrogen gas has a volume of 34 mL at 95 mm Hg. What is the new pressure if the gas volume increases to 55 mL?
Answer:
The answer is 58.73 mmHgExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
So we have
[tex]P_2 = \frac{95 \times 34}{55} = \frac{3230}{55} \\ = 58.72727272...[/tex]
We have the final answer as
58.73 mmHgHope this helps you
properties of proton
Answer:
Protons are found in the nucleus of the atom. This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27 kilograms.
Hope this helps☺️
Which of the following best describes an ionic compound? *
a positively charged compound composed of cations and atoms
a negatively charged compound composed of anions and atoms
a neutral compound composed of protons and electrons
a neutral compound composed of cations
The compound is neutral overall, but consists of positively charged ions called cations and negatively charged ions called anions.
(I hope this helped ^^)
Ionic compounds can be defined as a neutral compound composed of protons and electrons. Thus option C is correct.
An ionic compound has been formed by the transfer of electrons between atoms. The transfer of electrons will impose a charge on the atoms involved in the bond, and result in an ionic compound.
The interaction of the positively charged cations and negatively charged anions takes place. The protons are the positive charged species and electrons are the negatively charged species.
Thus, the ionic compound has been a neutral compound formed by protons and electrons. Thus option C is correct.
For more information about ionic compounds, trefer to the link:
https://brainly.com/question/9167977
Which structure represents an organ in a plant?
A : vascular system
B: stem
C: xylem
D: chloroplasts
Answer:
the answer is stem please mark me as brainlist
Which element is the most reactive?
sodium
nickel
carbon
oxygen
Answer:
Sodium.Hope this helps please consider marking brainliest!!
Explanation:
Sodium metal reacts rapidly with water to form a colourless basic solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The reaction continues even when the solution becomes basic. The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.
Calculate the number of carbon atoms in a 140.0g sample of glucose (C6H12O6) . Be sure your answer has a unit symbol if necessary, and round it to significant digits.
Answer:
There are 2.81 * 10^24 atoms present
Explanation:
To get this, we need to know the number of moles present in 140gramms of carbon.
Mathematically;
number of moles = mass/molar mass
molar mass of glucose is = 180 g/mol
So the number of moles will be ;
140/180 = 0.7778 mole
1 mole of glucose contains 6 moles of carbon;
so 0.7778 moles will contain = 4.667 moles
Mathematically, the number of atoms in 1 mole is 6.02 * 10^23 atoms
The number of atoms in 4.667 moles will be :
4.667 * 6.02 * 10^23 = 2.81 * 10^24 atoms
3. If the distance between two ions of the same charge is increased, what will happen to the energy of interaction between the ions? Why?
Answer:
The electrostatic attraction energy between ions of opposite charge is directly proportional to the charge on each ion (Q 1 and Q 2 in Equation 4.1. 1). Thus, more energy is released as the charge on the ions increases(assuming the internuclear distance does not increase substantially).
What would be an adaptation for living in the tundra
Answer: you would hace to adapt to the climate
Explanation:
Answer: Migration and hibernation are examples of behavioral adaptations used by animals in the Arctic tundra. The fact that many animals do not live year-round in the tundra means they leave or migrate for a length of time to warmer climates.
is 8 hcl and 2 h2 products, consumers or reactants
Answer:
8 hcl and h2 is reactants.
What substance makes lemon juice vinegar and soda
Answer:
Sodium bicarbonate or baking soda
Explanation:
Imagine a campfire on a cold day. At first, the temperature of each log is as cold as the air around it. A few hours after the fire has burned out, the temperature of the ashes will also be cold. But in between, when the fire is burning, the temperature of the logs and surrounding air is very hot. What is the source of this thermal energy? For the answer, begin by identifying the reactants and products for the overall chemical reaction of burning wood. Wood is mostly carbohydrates, the bulk of which is cellulose. Cellulose is made up of hundreds to thousands of glucose groups connectected by oxygen molecules. The chemical formula for cellulose is (C6H12O6)n, where n is the number of glucose groups. For more manageable models, carbohydrates will be modelled as glucose with a chemical formula of C6H12O6.
Answer:
See explanation
Explanation:
From the statement of the first law of thermodynamics, energy is neither created nor destroyed, but is transformed from one form to another.
Thermal energy is possessed by the hot air while the fire is burning. This thermal energy was obtained from the chemical energy stored in carbohydrates(cellulose) that is present in wood material. As the combustion proceeds, chemical energy stored in chemical bonds of the wood material converts into thermal energy (heat energy). The chemical reaction involved in the combustion of wood can be simplified as shown below; n represents the number of glucose units that combine to make up the cellulose present in the wood material.
nC6H12O6(s) + 6nO2(g) ===> 6nCO2(g) + 6nH2O(g)
n may even be as much as thousands of glucose units.