please answer as quick as possible
Q2. Which of the following elements is an alkali metal
A Potassium
B Chlorine
C Neon
D Krypton
Answer:
A - potassium........ M
Answer:
POTASSIUM
Explanation:
3. Which of these statements is false?
A. Electrons have a negative charge
B. Electrons have a mass of 1 amu
C. The nucleus of an atom is positively charged
D. The neutron is found in the nucleus of an atom
the answer is B. ......
ok so can someone help me with my guy problems
Answer:
ofc! whats ur question my guy
Explanation:
Answer:
sure
Explanation:
A solution of 0.220 g of KIO3 is prepared in 50 ml volumetric flask. 2.00 mL of this solution is pipetted into a beaker with 8.00 ml distilled water, to give 10 ml of diluted KIO3. To this, 10.00 mL of starch sulfite was added. What would be the initial concentration of IO3- in this final solution
Answer:
0.00044 g/mL
Explanation:
First, 0.220 g of KIO₃ are dissolved in 50 mL, so the concentration at this point is:
0.220 g / 50 mL = 0.0044 g/mLThen 2.00 mL of this solution are added to 8.00 mL of water (final volume = 10.00 mL). We calculate the concentration of the resulting solution:
0.0044 g/mL * 2.00mL / 10.00mL = 0.00088 g/mLFinally, to this 10 mL solution, another 10.00 mL were added. Thus the KIO₃ (or IO₃⁻) concentration is:
0.00088 g/mL * 10.00mL / 20.00mL = 0.00044 g/mLHow much heat does it take to move 45 g of ice at -25°C to water at 31°C?
2. Each type of atom is called an element. Which part of the atom give the
atoms its Identity?
The smallest particle of an element which is indivisible and takes part is chemical reaction as a whole without division is called an atom.
the three fundamental particles that identify the atoms are protons, neutrons and electrons.
Fill in the blank. (Copper has a charge of 2+)
Cu+ AgNO3 → Ag +
Answer:
Cu(NO3)2
Explanation:
Cu+AgNO3--->Ag+Cu(NO3)2
[tex]Cu+AgNO_3[/tex] → [tex]Ag+Cu(NO_3)_2[/tex] is the complete reaction.
What is a chemical reaction?A chemical change occurs when two or more substances combine to form a new substance.
[tex]Cu+AgNO_3[/tex] → [tex]Ag+Cu(NO_3)_2[/tex] is the complete reaction.
Copper and silver nitrate react to form cupric nitrate and silver.
Learn more about the chemical reactions here:
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what are the good and bad effects of bacteria
Answer:
they are bacteria
Explanation:
Answer:
Good bacteria keeps you healthy by supporting your immune function and controlling inflammation. Certain types of good bacteria can also: Help your body digest food. Keep bad bacteria from getting out of control and making you sick.
Explanation:
I hope this helps and pls mark me brainliest :)
There are three bulbs powered by a battery. What will happen if the middle light burns out.
Answer:
ABC
Explanation:
A thick, oily liquid found deep in the earth that is refined and used as a source for gasoline is called _____________?
Petroleum
Reserve
Lumber
Coal
It would be A, Petroleum.
Hope this helped!
-William
The diagram shows the structure of an animal cell.
Which number label represents the cell membrane? (5 points)
Answer:
1
Explanation:
The cell membrane is the protective, semi-permeable membrane surrounding a cell and its contents.
Answer:
I think 19 I think I don't know
Heellllp plzz
thanks
Answer:
Tap test
Explanation:
Answer:
the rest dont sound as reasonable to me so i would say C
Explanation:
In a rate law the rate constant k, depends on which condition?
Answer:
Temperature is the awnser
20 points to whoever can answer these 3 questions correctly
Answer:
1.true
2.2
3. false
Explanation:
.........
Help plz pozlzlzksj help
Answer:
increase moles of gas inside
Explanation:
Answer:
Its ( C )- Decrease the temperature of the gas inside the basketball
Explanation:
To make sure the balloon doesn't inflate so much it bursts you should NOT completely inflate the balloons when you know the temperature will increase!
please help i don’t know this at all i am in a test
it is also called solution
Explanation:
In chemistry, a solution is a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent. ... The term "aqueous solution" is used when one of the solvents is water.
Which of the following keeps the planets in their orbits in the Solar System?
A friction
B gravity
C magnetism
D pressure
Answer:
B- gravity
Explanation:
Gravity is a force in which everything in the universe is trying to pull everyother thing towards themsef. Here, the sun's gravity keeps the planet in orbit.
I hope im right! !!
1. Which of the following best explains the motion of the box on the table?
Answer:
The box is at rest
Explanation:
not moving object
two oxides, X and Y are added seperately to dilute sulfuric acid and dilute sodium hydroxide. X reacts with dilute sulfuric acid but Y does not react. Y reacts with aqueous sodium hydroxide but X does not react. which type of oxide are X and Y ?
Answer:
c
Explanation:
x basic and metallic while y is acidic
The study of chemicals is called chemistry.
The correct answer is B.
The compound which has oxygen in it is called oxide. According to the question, the element is react with the acid and base.
The X only reacts with the acidic compound but not basic compound hence the element X is basic in nature. while Y only reacts with the basic compound, not X, hence the Y element is acidic in nature.
Therefore, the correct answer is B.
For more information, refer to the link:-
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elect the correct answer.
Which atom or ion is the largest?
A.
K
B.
K+
C.
Ca
D.
Ca2+
E.
Li
Answer:
Ca2+ I'm not sure hahahahhahah
Answer:
Ca
hope it is helpful..
How can a paperclip float on water? Use the
word 'surface tension' in your answer,
During ANY type of phase change, which of the following is TRUE? *
1. The temperature changes
2. The energy increases
3. The energy decreases
4. The temperature stays the same
balance the following equation FeC²+Cl². FeCl³
Answer:
this equation is not proper see that where is the reactant.
Explanation:
give give a proper question and I will
if fecl2 + c2 gives a fecl3 where does the carbon compound go
Answer:
2FeCl2 + Cl2 → 2FeCl3
Explanation:
What does 10% humidity in a weather report indicate?
A)the level of humidity is high.
B)the level of humidity is low.
C)the level of humidity is moderate.
D)the air can not hold anymore water.
Answer:
B
the humidity is the % of water in the air and it is out of 100% of the air. so 10/100 is low
Answer:
B
Explanation:
30%-50% is considered moderate. Anything below 30% is considered dry, anything above 50% is considered high. I hope this helps!
In a flexible container, when the temperature of a gas increases, the volume of the gas will increase.
Please select the best answer from the choices provided
T
F
Answer:
true
Explanation:
hope this helps, I took the test too
build a prototype or test model of the invention
The tectonic plates float on the lower portion of Earth's crust?
Answer:
The tectonic plates comprise the bottom of the crust and the top of the Earth's mantle. There are ten major plates on Earth and many more minor ones. They float on a plastic-like part of the Earth's mantle called the asthenosphere.
Explanation:
Answer:
Yes
Explanation:
Shale is a sedimentary rock that can can be metamorphosed into slate by
HELP ASAP!!!!!!!
Nieko purchases a box of granola cereal that has a mass of 0.312 kg. When he gets
home, he sorts the cereal into groups: oats, raisins, and nuts. Next, he measures the
mass of each group. What will Nieko find when he adds together the mass of each
group?
Answer:
girlll we got da same question we need help
Nieko purchases a box of granola cereal that has a mass of 0.312 kg, then according to law of conservation of mass, the mass of each group is 0.312 kg.
What is law of conservation of mass?According to law of conservation of mass the mass in isolated system can neither be created nor destroyed by chemical reaction and physical transformation but it transfer from one form to another.
When wood burn the mass of soot, gases and ashes is equal to the original mass of charcoal and the oxygen when it first created is one of the best example of law of conservation of mass.
Thus, Nieko purchases a box of granola cereal that has a mass of 0.312 kg, then according to law of conservation of mass, the mass of each group is 0.312 kg.
To learn more about law of conservation of mass, refer to the link below:
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