a) The bubbles must be negatively charged.
b) The bubbles must be positively charged.
c) The bubbles must have the opposite charge to the charge on the student.
d) The bubbles must have the same charge as the charge on the student.
Answers
Answer:
C
Explanation:
like charges repel each others so if they have the same charge they will move away from each other
Related Questions
what happens to rubber when hammered
Answers
Answer:
No change
Explanation:
Since rubber are elastic in nature, there's no change in it's state even if it is hammered. So, it will be in it's initial state as it was before.
The word "atom" comes from the Greek word
Answers
Answer:
1) atomos. 2) uncuttable.
Explanation:
none
Answer is atomos
Explanation: it’s the answer trust me
Where does reduction occur in an electrochemical cell?
Answers
Answer:
The cathode is the electrode where reduction takes place.
so
reduction occur in Cathode in an electrochemical cell.
Answer: Cathode
Explanation:
.
a 20.5g sample of cleaning detergent contains 8.61g of NH40H.CALCULATE the percentage composition of nitrogen in the cleaning detergent sample
Answers
Answer:
The mass percentage composition of nitrogen in the sample of the cleaning detergent is approximately 16.78%
Explanation:
The given mass of the sample of the cleaning detergent, m₁ = 20.5 g
The mass of the ammonium hydroxide, NH₄OH in the detergent, m₂ = 8.61 g
The molar mass of NH₄OH = 35.04 g/mol
The molar mass of nitrogen, N = 14.01 g/mol
Therefore, the mass, m₃ of nitrogen, N, in 8.61 g of ammonium hydroxide, NH₄OH, is found as follows;
m₃ = (14.01/35.04) × 8.61 g = (402,087/118,800) g ≈ 3.44 g
The mass of nitrogen, N, in the ammonium hydroxide, NH₄OH, contained in the 20.5 g sample of the cleaning agent, m₃ ≈ 3.44 grams
The percentage composition of nitrogen in the sample of the cleaning detergent, %N is given as follows;
[tex]\% Composition = \dfrac{Mass \ of \ component}{Total \ mass \ of \ cleaning \ detergent} \times 100[/tex]
Therefore;
%N ≈ ((3.44 g)/(20.5 g)) × 100 ≈ 16.78 %
The percentage composition of nitrogen, %N ≈ 16.78%.
ХА
19
Which two major parts of the Earth system does this photo most clearly
show?
O A. Atmosphere
B. Biosphere
c. Cryosphere
PREVIOUS
Answers
Answer:
B. Biosphere.
Explanation:
What mass of helium gas (in g) occupies 15.3 L at STP?
Answers
Answer:
[tex]\boxed {\boxed {\sf 2.73 \ g \ He}}[/tex]
Explanation:
We are asked to find the mass of helium gas given a volume.
1. Convert Liters to Moles1 mole of any gas occupies a volume of 22.4 liters. So, 1 mole of helium gas contains 22.4 liters of helium. Create a ratio using this information.
[tex]\frac {1 \ mol \ He }{ 22.4 \ L \ He}[/tex]
We are converting 15.3 liters of gas to moles, so we multiply by that value.
[tex]15.3 \ L \ He *\frac {1 \ mol \ He }{ 22.4 \ L \ He}[/tex]
The units of liters of helium (L He) cancel.
[tex]15.3 *\frac {1 \ mol \ He }{ 22.4}[/tex]
[tex]\frac {15.3}{22.4} \ mol \ He[/tex]
[tex]0.6830357143 \ mol \ He[/tex]
2. Convert Moles to GramsThe molar mass is the mass of 1 mole of a substance. These values are found on the Periodic Table as atomic masses, but the units are grams per moles. Look up the molar mass of helium.
He: 4.0026 g/molCreate another ratio using the molar mass.
[tex]\frac {4.0026 \ g \ He}{1 \ mol \ He}[/tex]
Multiply by the number of moles we calculated.
[tex]0.6830357143 \ mol \ He *\frac {4.0026 \ g \ He}{1 \ mol \ He}[/tex]
The units of moles of helium (mol He) cancel.
[tex]0.6830357143*\frac {4.0026 \ g \ He}{1 }[/tex]
[tex]2.73391875 \ g \ He[/tex]
3. RoundThe original measurement of volume has 3 significant figures, so our answer must have the same.
For the number we calculated, that is the hundredths place.
The 3 in the thousandths place to the right (2.73391875) tells us to leave the 3 in the hundredths place (2.73391875).
[tex]2.73 \ g \ He[/tex]
15.3 liters of helium gas is approximately 2.73 grams of helium.
What is the boiling point (in °C) of a 0.743 m aqueous solution of KCI?
Enter your rounded answer with
3 decimal places.
Answers
WILL MARK BRAINLY IF GOOD ANSWER :)
Chlorine and oxygen are both gases at room temperature. What are some characteristic properties of chlorine that distinguish it from oxygen?
Answers
Answer:
Well one characteristic is electical energy transforms into thermal energy and gases and the state of matter(one of the distinct form i which matter exist)
Explain how the existence of ions relates to the number of electrons present in atoms of an element? (A.P.E.X)
Answers
Answer:
if you have options please include them, but I'll give you an idea.
Explanation:
The existence of ions happens when atoms lose or gain electrons.
if an atom gains an electron it will become a negative ion (because electrons are negative, and you gained more negativity.)
if an atom loses an electron it will become a positive ion (because it has lost negativity, which is the electron that we've lost).
I hope it helps, if it does please mark me brainliest!
what charge does an atom that has gained electrons have?
Answers
Answer:
I think it's positive charge
Which of the following materials contains a base?
a. Stomach digestive juices
b. Orange juice
c. Ammonia window cleaner
d. Vinegar
Answers
Answer:
c. ammonia window cleaner
Explanation:
Window cleaners contain ammonia (a base) for the purpose of removing the dust and grease on the windows.
digestive juices, orange(a citrus) juice, and vinegar are all highly acidic.
... give me brainliest please :)) ...
A(n) _____ is a hydrocarbon in which one or more hydrogen atoms is replaced by a -COOH and a -NH2 group. aldehyde carboxylic acid alcohol amino acid
Answers
Answer:
Amino Acid
Explanation:
It's part of the Amino group, which are substituted hydrocarbons.
When NH₂ and COOH replaces hydrogens on the same carbon atom in a molecule, an Amino acid is formed.
What group is a COOH?
COOH : a Carboxylic Acid group!
Propane can be cracked to produce propane and hydrogen. Complete the symbol equation for the reaction.
Answers
Answer:
Explanation:
C3H8= C3H6 +H2
HF or HCl which can form the hydrogen bond? Explain your answer.
Answers
Answer:
can only form one hydrogen bond each
Explanation:
can only form one hydrogen bond each
A sample of oxygen gas has a volume of 453.7 mL when its pressure is 0.435 atm. What will the volume of the gas
be
at a pressure of 0.88 atmospheres, if the temperature remains constant?
Answers
Answer:
is you'r question correctly?
or not
Formation of HCl from H₂and Cl₂ is example of
photochemical
electrochemical
displacement
Answers
Answer:
Combination reaction.
Explanation:
The reaction depicted in the question is;
H2 (g) + Cl2 (g) ⟶ 2HCl (l)
Now, this reaction shows that two reactants namely hydrogen and chlorine react to form a single product named Hydrogen chloride. This process is called combination reaction.
Which statement describes the VSEPR theory?
A.
Electron pairs in the valence shell of an atom have a tendency to attract other nearby electron pairs.
B.
Electrons in the valence shell of an atom exert a repulsive force on other atoms while forming a chemical bond.
C.
Electron pairs in the valence shell of an atom exert a repulsive force on all other electron pairs in the valence shell of the atom.
D.
Electrons in the valence shell exert a repulsive force while completing their octet during the formation of chemical bond.
Answers
Answer:
A.
Electron pairs in the valence shell of an atom have a tendency to attract other nearby electron pairs.
Hope it helps you.PLZ HELP ME WITH MY WORK
For his science fair project, Martin studied the growth of trumpet vines. He grew 20 trumpet vines. All of the conditions were the same, except that he grew 10 in a flower bed without support and 10 in a flower bed near a trellis. The stems of the vines near the trellis twisted around the trellis, and these Yines grew tall and seemed much healthier than the vines grown without a trellis. In fact, four of the vines grown without a trellis died. Which characteristic of living things were the trumpet vines displaying as the stems twisted around the trellis?
A. Movement
B. Response to a stimulus
C. Use of energy
D. Reproduction
Answers
Answer:
it's B
Explanation:
Climbing plants require an external support to grow vertically and enhance light acquisition. Vines that find a suitable support have greater performance and fitness than those that remain prostrate. Therefore, the location of a suitable support is a key process in the life history of climbing plants
what is the most appropriate unit to measure the following; the length of a football field. b) the diameter of a tennis ball
Answers
Explanation:
a) m (metre)
b) mm (millimeter)
The elements in groups 1A, 6A, and 7A are called, __________, respectively. Group of answer choices alkaline earth metals, halogens, and chalcogens alkali metals, chalcogens, and halogens alkali metals, halogens, and noble gases alkaline earth metals, transition metals, and halogens halogens, transition metals, and alkali metals
Answers
Answer:
1A Alkali Metals
6A Chalcogens
7A Halogens
Answer:
alkali metals, chalcogens, halogens
Explanation:
Group 1A is alkali metals
Group 6A is chalcogens
Group 7A is halogens
why atoms of magnet differ from normal atoms?
Answers
Answer:
ones in magnets r close together while others can be spread apart
Which element will form In ion whose lonic radius is larger than its atomic radius?
(1) K
(2) F
(3) LI
(4) Mg
Answers
Answer:
Letter b so F
Explanation:
I hope this help
Explanation:
All five ions have an equal number of electrons and therefore share the same electron configuration. For example, a neutral calcium atom (Z=20) has 20 electrons; it loses two of them to form a Ca2+ cation, which would thus contain 20−2=18 electrons. Similarly, a phosphorus atom (Z=15) gains three electrons to form a P3− anion that contains 15+3=18 electrons.
Positively-charged protons in the nuclei attract the negatively-charged electron cloud. Each proton carries a +1 charge; the more protons an atom or ion contains the stronger the attraction it poses on its electron cloud. A nucleus of strong positive charge pulls its electron cloud towards itself tightly such that the latter would have a small radius.
The periodic table is arranged in the order of increasing proton number. Phosphorus comes the first among the five species and contains the least number of protons. Its ion would be the largest among the five. Calcium comes the last and forms the smallest ion.
Number of protons per nucleus P<S<Cl<K<CaStrength of Electrostatic attraction on the electron cloud P<S<Cl<K<CaIonic radius P3−>S2−>Cl−>K+>Ca2+
The chemical elements display periodicity when they're arranged according to
A: Atomic Weight
B: Atomic Mass
C: Atomic Volume
D: Atomic Number
Answers
Answer:
HEY YOUR ANSWER IS ATOMIC NUMBERCan someone please give me a clear definition of what ceramics are? It will really help! :)
Answers
The pots and other articles made from clay hardened by heat is called ceramics..
HOPE IT'S HELPFUL FOR U MATE!!!!
calcium hydrogen sulphite cress cross
Answers
Answer:
Ca Hso4 ×
Explanation:
Because i did whT you said
Oxit bazơ có những tính chất hóa học nào?
Answers
Answer:
tác dụng với acid,
Explanation:
calculate the maximum mass of ethanol that could be obtained from 30.0g of glucose
Answers
Answer:
15.3g
Explanation:
C6H12O6 → 2C2H5OH + 2CO2
1 mol C6H12O6 = 180g
1 mol CH3-CH2-OH = 46g
From 180g glucose ethanol can get = 92g
30g glucose ethanol gives us = (92*30)/180 = 15.33g
Can you answer Chemistry means in wide?
Answers
Answer:
Chemistry is a branch of a science which explain about study of composion properties and the transformation or change of matter.
Which level of organization is formed when a group of organs work together to perform complex functions?
Answers
I think that could be “system of organs”
Answer:
an organ system is formed when a group of organs works together to perform complex functions. it is composed of two or more tissue types and performs a specific set of tasks for the body
1.One gram-atom of Nitrogen is heavier than one gram-atom of Oxygen.
True or false
2.Measurements of a physical quantity. can be very precise but not accurate
True or False
Answers
Answer:
1 . statement is false
2. statement is true
