Answer:
0.02 mol.
Explanation:
The number of ions produced when a substance dissolves is always equal to the number of Adams in a chemical formula. What is incorrect about following statement?
Living organisms contain a variety of specailsed cells name one example of a specialised cell in the body and state its function example : function :
Answer:
See the answer below
Explanation:
The cell represents the basic unit of life and any living organism.
One example of specialized cells in the body are the sex cells.
The sex cells are primarily concerned with reproduction and perpetuation of life. The cells undergo meiosis to produce haploid gametes. Male and female gametes then fuse together during fertilization to give rise to diploid zygotes which eventually give rise to new organisms.
Question 7 of 10
The Sun has a diameter of about 865,000 miles.
Suppose you were making a scale model of the
solar system with a scale of 1 inch:1,000 miles.
How wide would the Sun be in your model?
A. 865,000 inches
B. 865 inches
C. 86.5 inches
O D. 8.65 inches
Answer:
you have to decide 865,000 with 1000 and the answer is 865
A woman uses 330 Joules of energy to push a box across the floor in 33 seconds. What is her power output in Watts?
Answer:
10 watts
Explanation:
Power = Work / Time
Power = 330 J / 33 s
Power = 10 watts
How many molecules of CrCl₃ are produced when 2.89 moles of CuCl₂ react? *
2Cr+3CuCI2-2CrCI3+3Cu
Explanation:
The reaction is CaCO
3
+2HCl→CaCl
2
+H
2
O+CO
2
.
Thus, 2 moles of HCl reacts with one mole of calcium carbonate to produce one mole each of calcium chloride, water and carbon dioxide respectively.
Hence, 3 moles of HCl will react with excess of calcium carbonate to produce 3×
2
1
=1.5 mol of carbon dioxide
what is phase change?
Explanation:
In chemistry, thermodynamics, and many other related fields, phase transitions (or phase changes) are the physical processes of transition between the basic states of matter: solid, liquid, and gas, as well as plasma in rare cases.
Answer:
In chemistry, thermodynamics, and many other related fields, phase transitions are the physical processes of transition between the basic states of matter: solid, liquid, and gas, as well as plasma in rare cases. A phase of a thermodynamic system and the states of matter have uniform physical properties.
Explanation:
1. All the individuals of one type of clownfish ( e. species) living in a reef compose which level of organization?
calcium + zinc nitrate ------->
a) zinc + calcium chloride
b) there will be no reaction
c) zinc + calcium nitrate
d) calcium + zinc nitrate
Answer:
c
Explanation:
there will be displacement reaction taking place
Answer:
there will be no reaction
Explanation:
there will be no reaction since calcium does not displace zinc
2.
You take a gas at 3 atm and increase the temperature from 120 K to 240 K. What is the final pressure?
A
6 atm
B
Not enough information
C
3 atm
D
1.5 atm
Answer:
A. 6atm
Explanation:
Using pressure law equation:
P1/T1 = P2/T2
Where;
P1 = initial pressure (atm)
T1 = initial temperature (K)
P2 = final pressure (atm)
T2 = final temperature (K)
According to this question;
P1 = 3 atm
P2 = ?
T1 = 120K
T2 = 240K
Using P1/T1 = P2/T2
3/120 = P2/240
Cross multiply
240 × 3 = P2 × 120
720 = 120P2
P2 = 720/120
P2 = 6atm
Which of the following elements is the most reactive?
A. Ba
B. Cs
C. Hf
D. Lu
Answer: Cs because its further to the right on the table, meaning its more reactive.
Explanation:
Answer:
Cs
Explanation:
This element is the farthest right, and lowest meaning that its reactivity is very high.
1. valence electrons and electronegativity
2. Both reactivity and electronegativity decrease down a group.
3. Electronegativity decreases down a group and reactivity increases down a group.
4. The number of valence electrons increases from left to right.
5. Cs
{quizlet: captncrun}
In the electrolysis of molten lead bromide, what is the product at the anode?
Answer:
it is the second one. Lead
Equal masses of two substances absorb the same amount of heat. The temperature of a substance A increases twice as much as substance B. Which substance has a higher specific heat capacity?
A. Substance A
B. Substance B
Letter A because the temperature of a substance A increases "Twice as much".
4. Proteins make up our bodies ?
Am I doing this right?
What is [OH-] of a solution
with a pH of 4.0?
Answer in M
When Acid Rain falls on limestone, the rock is eroded and carbon dioxide is produced.
Write a balanced equation for the reaction between calcium carbonate and nitric acid.
The formula of calcium carbonate is CaCO3
The formula of nitric acid is HNO3.
When put together:
CaCO3 + HNO3 = Ca(NO3)2 + CO2 + H2O
The balanced equation:
CaCO3 + 2HNO3 = Ca(NO3)2 + CO2 + H2O
what is the effect of light on valence electrons?
Answer:
When a small amount of external energy in the form of light is applied to the conductor, the valence electrons gain enough energy from the light to break the bonding with the atom and they jumps into the conduction band.
The effect of light on valence bis absent negative charges in the valence band, correspond to electrons elevated to the conduction band. When the semiconductor is lit, current flow is increased by both electrons and holes.
Why are valence electrons important?The outermost or valence shell electrons, known as valence electrons, are crucial because they shed light on an element's chemical characteristics and are the ones that are acquired, lost, or shared during a chemical reaction.
In general, when an atom's outermost electron shell is full, it is at its most stable and least reactive.
Thus, The valence electrons get enough energy from the light to break their link with the atom and move into the conduction band when a modest amount of external energy in the form of light is delivered to the conductor.
To learn more about the valence electron, follow the link;
https://brainly.com/question/28977387
#SPJ2
list the factor on which Ka of a weak acid depends
According to the graphs, by what factor will the ocean's acidity change from 2005 to 2100?
A) 0.2
B) 0.5
C) 1.6
D) 2.2
Answer: C) 1.6
Explanation: I got it right
i’m not even sure if this is the right subject or like if this is even a question lol anyways
List at least 3 physical or chemical properties of the element Cobalt
1. The chemical formula of caffeine is C8H10N4O2. Determine the percent composition of the molecule.
Show work please
Answer:
we find the mass for each element in one mole by multiplying the number of atoms in one molecule with the atomic mass
mC=8Ac=8*12=96g
mH=10AH=10*1=10g
mN=4AN=4*14=56g
mO=2AO=2*16=32g
by adding the masses together we find the molar mass of the molecule
M=mC+nH+mN+mO=96+10+56+32=194g/mole
we apply the rule of threes to find the percentage of each element
194g..96gC..10gH...56gN....32gO
100g....a...........b...........c.............d
a=(100*96)/194=49.48%C
b=(100*10)/194=5.19%H
c=(100*56)/194=28.85%N
d=(100*32)/194=16.48%O
Explanation:
What is the highest level of organization for living and nonliving things?
Community
Ecosystem
Family
Population
✨And give a explanation ✨
Why does nobody fking answer my questions.
How did stromatolites contribute oxygen to the early atmosphere?
through methane degradation
through photolysis
by weathering of rocks
through photosynthesis
Answer:
by wearing of rocks
Explanation:
earths gravity your welcome
Answer:
weathering of rocks is the answer to your question
A force of 25 newtons is exerted over an area of 50 square meters. Calculate
the pressure exerted in pascals.
Answer:
the pressure exerted in pascals is 0.5 Pa
Explanation:
The computation of the pressure exerted in pascals is shown below:
As we know that
Pressure = force ÷ area
= 25 ÷ 50
= 0.5 Pa
Hence, the pressure exerted in pascals is 0.5 Pa
We simply applied the above formula so that the correct pressure could come
In a chemical reaction between copper metal and silver nitrate, 12.7 g of copper(II) and 64.5 g of silver nitrate react, and 38.1 g of Silver is produced. 21) Predict the products and write the balanced equation and include the physical state of each. 22) What type of chemical reaction is this? 23) Which is the limiting reactant? You must include the work for this to receive full credit. 24) What mass of excess is used up, and what mass is left over? 25) Calculate the percent yield.
Answer:What should you do if you realize during research that your original theory is wrong
Explanation:
When electrons lost a blank ion is formed
When electrons are gained a blank ion is formed
Answer:
I love it
Explanation:
☁️ Answer ☁️
annyeonghaseyo!
Your answer is:
When electrons are lost, a positively charged ion is formed. When electrons are gained, a negatively charged ion is formed. (I like the car)
Hope it helps.
Have a nice day noona/hyung!~ ￣▽￣❤️
three examples of resistors
Answer:
fixed resistors, variable resistors, resistance dependent on a physical quantity
complete the bolded items in each box below
Show the bolded items and the boxes.
What element is in group 4 and period 3
how many significant figures are in the measurement 12.4 kg
explain why a total lunar eclipse appears red.
I
Answer:
During a total lunar eclipse, the Earth lies directly between the sun and the moon, causing the Earth to cast its shadow on the moon.
Explanation: