Answer:
Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
Explanation:
PLEASE HELP WILL MARK BRAINLIEST
Answer:
1. protons
2. hydrogen
3. protons plus neutrons
4. nuclear force
5. they are composite particles
6. proton-positive-inside nucleus; neutron-no charge-inside nucleus; electron-negative-outside nucleus/electron cloud
7. sublevels
8. 4 energy levels
Explanation:
What are some of the ways that people can Reduce their use of fossil fuels?
Answer:
By using renewable energy sources.
Explanation:
You need to satisfy a quota of energy for (whatever country you live in). People do this by using the cheapest way of producing the most energy, the most efficient. Sounds great right? Wrong! It stuffs our atmosphere with harmful gasses like carbon dioxide. You can reduce the use of these fossil fuels by using renewable energy sources such as windmills, watermills, and most notable, solar panels!
Solar panels. Generating electricity with solar power instead of fossil fuels can dramatically reduce greenhouse gas emissions, particularly carbon dioxide (CO2). ... By going solar, you can reduce demand for fossil fuels, limit greenhouse gas emissions, and shrink your carbon footprint.
in an equilibrium reaction with a Keq of 1×10^8,the-
A) reaction are favored
B) reaction is exothermic
C) products are favored
D) reaction is spontaneous
When two different liquids are mixed together, the liquid with the lesser density will float on top of the liquid with the greater density. If 11mL of a liquid having a mass of 55 g is mixed with 12 mL of a liquid having a mass of 48 g, which liquid will float on top? Explain your answer. (Show your calculation)
Answer:ddddddddddd
Explanation:rrrrrrrrrrrrrrrrrrrrrrrrr
what is the blank +5+___=0
Answer:
(-5)
Explanation:
The half-life of carbon-14 is 5,730 years. Dating organic material by looking for C-14 can't be accurately done after 50,000 years. Suppose a fossilized tree branch originally contained 4.30 grams of C-14. How much C-14 would be left after 50,000 years?
Answer:
0.010g of C-14 would be later after 50,000 years
Explanation:
The kinetics of radioactive decay follows the equation:
Ln (N / N₀) = -kt
Where N could be taken as mass after time t,
N₀ initial mass = 4.30g;
k is rate constant = ln 2 / t(1/2)
= ln 2 / 5730years = 1.2097x10⁻⁴ years ⁻¹
Replacing:
Ln (N / 4.30g) = -1.2097x10⁻⁴ years ⁻¹ * 50000 years
N / 4.30 = 2.36x10⁻³
N =
0.010g of C-14 would be later after 50,000 yearsAny 1 know These Chemicals??
Answer:
A) 1 & 2 only
Explanation:
Seeing that the chemicals present are in question one I take it you are asking about that question.
Decreasing the concentration causes a decrease in reaction process and also the total amount of product you would get out of the given reaction
Decreasing the temperature causes the molecules in this reaction to become less excited or reactive, thus causing the reaction to slow down
Why did Chief John Ross decided to sign a treaty with Albert Pike? A. The victory at Wilson’s Creek convinced Ross the Confederacy would win. B. He was working as a spy for the Union. C. He planned to ignore the treaty and move his tribe west. D. Because his tribe needed money to support their interests during the war.
Answer:
D, i think..
Explanation:
Answer:
It's A.
Explanation:
A.The victory at Wilson's Creek convinced Ross the Confederacy would win.
While cleaning out the garage, Duane found his old bicycle. Some of the paint had worn off, exposing the iron frame inside. Duane noticed that parts of the iron frame had become reddish-brown and rough and that parts were flaking off. What happened to Duane's old bicycle?
Answer:
It began to rust.
Explanation:
Because it had been left out for a long time
The table below compares some of the properties of three different objects that are all made of pure substances.
Object Melting Point Mass Volume
X 327.5°C 10 g 25 cm3
Y 1,083°C 10 g 12.5 cm3
Z 327.5°C 5 g 12.5 cm3
According to the table, which of the following is most likely true?
Answer:
c. object y is made of a different substance than x and z
Explanation:
why well i did the study island and it told me the answer why so don't ask
Is food coloring and water a compound?
AI a =m not suresedfdssssssssssss
pls need asap!
A neutral atom of Bromine has a mass number (atomic mass) of 80. Which of the following statements about this atom is INCORRECT?
It would have 35 electrons
The number of protons and neutrons added together would equal 80
It would have 35 protons
It would have 35 neutrons
Answer:
C
Explanation:
Which group on the periodic table has the largest atoms?
Answer:
Cesium
hope this helps :)
Calculate the energy required to heat 622 g
mercury from 37°C to 42°C. The specific
heat capacity of Hg(l) is 0.138 J/g.° C.
Answer in units of cal.
Answer:
102.58 cal.
Explanation:
Given data:
Mass of mercury = 622 g
Initial temperature = 37°C
Final temperature = 42°C
Specific heat capacity of mercury = 0.138 J/g.°C
Energy required = ?
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 42°C - 37°C
ΔT = 5°C
Q = 622 g × 0.138 J/g.°C × 5°C
Q = 429.18 J
J to cal:
429.18 J × 1 cal /4.184 j
102.58 cal.
Determine la concentración de 10 ml de HCl que fueron valorados con 5 ml de NaOH 0.01 M. Seleccione una: a. 0.04 M b. 10 M c. 1 M d. 0.01 M e. 0.005 M
Answer:
0,005 M
Explanation:
Dado que:
Concentración de ácido (CA) = lo desconocido
Volumen de ácido (VB) = 10ml
concentración de base (CB) = 0.01 M
Volumen de base (VB) = 5 ml
Número de moles de ácido (NA) = 1
Número de moles de base (NB) = 1
Desde;
CAVA / CBVB = NA / NB
CAVANB = CBVBNA
CA = CBVBNA / VANB
CA = 0.01 × 5 × 1/10 × 1
CA = 0,005 M
(nh4)3po4 compound name
I just need help this is hard
Answer:
you can do anything if you put your mind to it. Also, school is not everything in life there are amazinng things in life that you need school for. you got this.
Condensation is a phase change that
O has an increase in kinetic energy
O has no change in potential energy
O is exothermic
O is endothermic
Answer:
endothermic
Explanation:
condensate is an endothermic change
determine the mass number and the atomic number of a chlorine atom that has 17 protons and 18 neutrons.
Answer:
35.453 atomic mass units
You can use Phet (Atomic masses, Elements and more) for Chemistry
Differentiate between physical and chemical change
Explanation:
Physical Change is a type of change where by no new chemical substance is formed. Physical changes are reversible. whilst Chemical change is a change where new chemical substance is always formed. Chemical changes are usually irreversible.
Examples of Physical Change include;
Melting of Ice
Melting of Candle
Grinding of chalk
Magnetization of Iron
Examples of Chemical Change includes;
Cooking of food
Rusting of Iron
Burning of Charcoal
Which mass and atomic number is correct for the following isotope: carbon-14
explain your answer
Answer:
Explanation:
Isotope notation is of the form
A
Z
X
where
Z
is the atomic number (number of protons),
A
is the mass number (sum of protons and neutrons), and X is the element.
In Carbon- 14 , 14 is the mass number (sum of protons and neutrons). This is our A .
Carbon has the atomic symbol C , and it has 6 protons. This is the atomic number, or A . Thus, the isotope notation for Carbon- 14 is 14 6 C
Hope this helps!
Explanation:
how many types of bonds can a carbon atom form?
Answer:
four
Explanation:
Carbon contains four electrons in its outer shell. Therefore, it can form four covalent bonds with other atoms or molecules.
Four students are carrying out different laboratory procedures. Piroja is mixing baking soda and vinegar to see if it reacts. Jason is heating salt water over a burner until the water evaporates. Kali is putting crushed ice and ice cubes on a table to see which melts first. Francisco is separating iron filings from sand using a magnet. Which experiment relies on convection? Piroja’s experiment Jason’s experiment Kali’s experiment Francisco’s experiment
Answer: Jason experiment
Explanation:
I just took the test
Answer: Jason's Experiment
Which of the following is a definition for an interstitial alloy?
a
an alloy in which the atomic sizes of the components are different
b
an alloy in which the atoms of the components in an alloy are about the same size
c
an alloy in which some of the atoms of the components are about the same size and some are different
d
a metal in which all of the atoms are of the same element
Answer:
c
Explanation:
An interstitial compound or interstitial alloy is a compound that is formed when an atom of sufficiently small radius sits in an interstitial “hole” in a metal lattice. Examples of small atoms are hydrogen, boron, carbon and nitrogen. These compounds are important industrially, for example some transition metal carbides and nitrides.
sodium hydroxide reacts with excess hydrochloric acid. calculate the mass of sodium hydroxide required to produce 117g of sodium chloride
NaoH+HcI→ NaCl +H2O
Na0H=23+16+l= 40 9m
Nacl=23 +35.5 =58.5 gm
mass of NaOH required=117x40/ 58.5 =80 gm
Molar mass of NaOH = 23+16+1 =40g/mol
Molar mass of NaCl = 23+35.5 =58.5g/mol
To produce 58.5g NaCl 40g NaOH is required
So, to produce 117g NaCl {(40/58.5)×117}g = 80g NaOH is required.
Hope, this helps.
what is the name of sc(oh)3
Answer:
Scandium(III) hydroxide
Explanation:
May I have brainliest please? :)
The name of the chemical compound Sc(OH)₃ is "scandium hydroxide."
A polyatomic ion is a charged chemical species composed of two or more atoms that are covalently bonded together and carry an overall electric charge. Unlike simple ions, which are single atoms with a positive or negative charge, polyatomic ions are groups of atoms with a net positive or negative charge due to the gain or loss of electrons.
In this compound:
"Sc" represents the chemical symbol for scandium, which is the metal cation in the compound.
"(OH)₃" represents three hydroxide ions (OH⁻) bound to the scandium cation.
The hydroxide ion (OH⁻) is a polyatomic ion that consists of one oxygen atom and one hydrogen atom, and it carries a negative charge.
So, the name of the compound Sc(OH)₃ is scandium hydroxide.
Learn more about polyatomic ion from the link given below.
https://brainly.com/question/6689894
#SPJ6
what is the name of the structure?
Answer:
The structure is called Propyl ethanoate
No of H atoms in 2.43 g of Aspartame(C^14H^18N^2O^5
Is this method CORRECT
Answer:
yes
Explanation:
The table below lists the properties of a metallic element.
shiny, silver colored, forms +1 and +2 ions, compound with sulfur is bright red.
Where on the periodic table would this element most likely be found?
Group 1
Group 2
Group 12
Group 13
Answer:
Group 12
Explanation:
Answer:
I got all answers correct on my test and got 100%, this question was in the test which got correct
so your answer is group 12
Explanation:
The more quickly you change your _____, the more ____ you will have to exert
Answer:
name, force
Explanation:
