Gold has a specific heat of 0.129 J/g °C. How many joules of heat energy are
required to raise the temperature of 23 grams of gold from 22 °C to 98
°C?
Look at picture
ASAP please will mark as brainlist don’t got much time
Answers
Answer:
210.657J
Explanation:
joules of heat energy needed= 23×0.129×(93-22)
=210.657J
Related Questions
1)Water takes this form above 100c (solid, liquid or gas)
2) Water takes this form below 0c (solid, liquid, or gas)
3) Water takes this star between 0 and 100c (solid, liquid, or gas)
4) Water changes to this state above 100c (solid, liquid, or gas)
Science wasn’t a subject so I chose chemistry but this is for my science class
Answers
Answer:
I say the 1st one I'm so terrible sorry if I'm wrong
Explanation:
Water can take many forms. At low temperatures (below 0°C), it is a solid. When at “normal” temperatures (between 0°C and 100°C), it is a liquid. While at temperatures above 100°C, water is a gas (steam).
The state the water is in depends upon the temperature. Each state (solid, liquid, and gas) has its own unique set of physical properties.
What are you doing when you are making sound
A. You are causing photons to vibrate
B. You are causing a medium to vibrate
C. You are causing the air pressure to drop
D. You are causing electromagnetic waves to radiate
Answers
What is the molecular formula of the following compound: NH_CI, molar mass = 51.5 g/mol?
Answers
Answer:
Explanation:
Explanation:
As you know, the empirical formula tells you what the smallest whole number ratio that exists between the atoms that make up a compound is.
In your case, you know that the empirical formula is
NH Cl
2
, which means that the regardles of how many atoms of each element you get in the actual compound, the ratio that exists between them will always be
1:2:1.
What you actually need to determine is how many empirical formulas are needed to get to the molecular formula.
Notice that the problem provides you with the molar mass of the compound. This means that you can use the molar mass of the empirical formula to determine exactly how many atoms you need to form the compound's molecule.
molar mass empirical formula×n=molar mass compound
To get the molar mass of the empirical formula, use the molar masses of its constituent atoms
14.0067 g/mol+2×1.00794 g/mol+35.453 g/mol=51.48 g/mol≈
51.5 g/mol
This means that you have
51.5g/mol×n=51.5g/mol
As you can see, you have
n=1.
This means that the empirical formula and the molecular formula are equivalent,
NH Cl.
2
Answer:
NH_Cl 2 is the answer to What is the molecular formula of the following compound: NH_CI, molar mass = 51.5 g/mol?
how many moles are in 5g of Na2CO3?
a) 0.047
b) 1
c) 2
d)21.2
Answers
Answer:
0.047
Explanation:
Data : 5g , Na2CO3
Formula:
Molecular mass of Na2Co3 = no.of atomic mass x no. of atom
moles = mass÷ molecular mass
molecular mass = 2(23)+1(12)+3(16)
=106amu
moles = 5÷106
= 0.047 Ans:
Lightning storms trigger wildfires that burn up a lot of the plants and grasses in the ecosystem. Trees are mostly spared. what is the cause of this
Answers
Answer:
B
Explanation:
:)
why cant you ice skate on a lake when it is not frozen
Answers
Answer:
You can't ice skate on a liquid, when it is frozen it is a solid, when it's unfrozen it is a liquid
How many moles are in 2.3 grams of phosphorus? show work
Answers
Answer:
0.074 moles
Explanation:
What is the physical state of substance in a chemical reaction? What are the symbols of physical state?
Answers
Answer:
The physical state of chemicals is also very commonly stated in parentheses after the chemical symbol, especially for ionic reactions. When stating physical state, (s) denotes a solid, (l) denotes a liquid, (g) denotes a gas and (aq) denotes an aqueous solution.
Explanation:
Hope you like my answer
Calculate the number of atoms in 0.0340 g Zn.
Answers
Answer:
moles Hg = 25.8 / 200.59 = 0.129
atoms = 0.129 x 6.02 x 10^23 =7.74 x 10^22
Moles Zn = 0.0340 / 65.39 =0.000520
atoms = 3.13 x 10^20
work in the same way : divide the mass by the molar mass and multiply by 6.02 x 10^23
Explanation:
The number of atoms in 0.0340g of Zinc (Zn) is 3.148 × 10²⁰ atoms.
HOW TO CALCULATE NUMBER OF ATOMS:
The number of atoms contained in a substance can be calculated by multiplying the number of moles of that substance by Avogadro's number (6.02 × 10²³). That is;no. of atoms = no. of moles × 6.02 × 10²³
In this question, we must first convert 0.0340g of Zinc to moles by using the following formula:no. of moles = mass ÷ molar mass
no of moles = 0.0340g ÷ 65g/mol
no of moles = 5.23 × 10-⁴mol
Hence, the number of atoms in Zinc is as follows:no of atoms = 5.23 × 10-⁴ × 6.02 × 10²³
no. of atoms = 5.23 × 6.02 × 10²³-⁴
no of atoms = 31.48 × 10¹⁹
no of atoms = 3.148 × 10²⁰ atoms.
Therefore, the number of atoms in 0.0340g of Zinc (Zn) is 3.148 × 10²⁰ atoms.Learn more: https://brainly.com/question/22552359?referrer=searchResults
please help im failing
Answers
Answer:
the second one
Explanation:
because there are 3 of Na and one N
How can a chemical reaction be sped up? Select from the drop-down menu to correctly complete the statement. Expose more of the reactant by increasing the A. Cataclyst B consentration c. Concentration d. Surface erea
Answers
Answer: A. Catalyst
Explanation:
An catalyst is used to speed up the rate of the reaction. In a biochemical reaction an enzyme is the only catalyst which is exposed to the reactant forming the enzyme substrate or reactant complex thus forming the product. The catalyst increases the product formation from the reactant by increasing the pace of the reaction. Catalyst does not get consumed in the reaction. It can be used repeatedly for multiple reactions.
What are the elements in group 1 of the
periodic table called?
Answers
Answer:
there called alkali metals
Answer:
alkali metals.
Explanation:
Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
A piece of substance Z is heated directly and it is found that 5805 Joules of energy are needed to raise the temperature of the substance from 25.0C to 35.0C. The specific heat of substance Z is known to be 1.28 J/gc. What was the mass in grams of this piece of substance Z?
Answers
Answer:
10.0 should be your answer
Explanation:
I have had this before unless of course they changed it
I NEED THE WORD EQUATION AND THE CHEMICAL EQUATION!!!!
Answers
3 + 24→4+ 2+2
Glycerine is viscous than water?why
Answers
Answer:
Yes
Explanation:
Why is glycerol more viscous than water?
The glycerine is more viscous than water because due to presence of hydrogen atoms , we all know that glycerine has more hydrogen bonding than water molecule , which makes an aggregation which means that glycerine is more viscous than water , in simple words glycerine can't flow as that of water molecule.
PLEASE HELP!!!
Which of the analogies best describes a Bohr model of an atom?
A. A Bohr model is like a bowling ball because they are both solid spheres.
B.A Bohr model is like a model of the solar system because they both show orbits around a massive center
C. A Bohr model is like a string of beads because they both contain small parts that are lined up in a row.
D. A Bohr model is like a jigsaw puzzle because they are both made up of small parts that are all joined together.
Answers
Answer:
B is the Bohr model of atom
If you produced 50.0 moles of carbon dioxide from the complete combustion of ethanol in air, how many moles of water vapor are also produced?
Answers
hojbiuhok.
Explanation:
.;..........hv
12. When can a theory be revised?
if the general public does not understand the theory
when a new scientist begins working on it
after 10 years
if new knowledge expands and corrects our understanding
Answers
Answer:
if new knowledge expands and corrects our understanding
Explanation:
However, science is always changing. As new evidence is uncovered, a theory may be revised or replaced by a more useful explanation.
To dissolve in water, zinc (Zn) should form a compound with
chloride (CI– ).
carbonate (CO32–).
hydroxide (OH– ).
phosphate (PO43–).
Answers
Answer:
carbonate i think
Explanation:
Answer:
Its Chloride
Explanation:
because im cool
What do atoms consist of?
Answers
Answer:
protons, neutrons, electrons
Answer:
Atoms consist of 3 particals:Protons,Neutrons,and Electrons
How does the oceanic crust compare to continental crust?
(1) the oceanic crust is thinner and contains less basalt
(2) the oceanic crust is thinner and contains more basalt
(3) the oceanic crust is thicker and contains less basalt
(4) the oceanic crust is thicker and contains more basalt
Answers
I think the answer is number (4)
What is the ultimate goal of reproductive strategies?
Answers
Answer:
to accelerate progress towards meeting internationally agreed reproductive health targets and, ultimately, to attain the highest achievable standard of reproductive and sexual health for all.
This is science talking about rocks
extrusive
or
Intrusive
Answers
What is the chemical name for Iridium(V) Oxide?
Answers
Answer: Iro2
Explanation:
Iro2 compound name
Iridium(IV) oxide
Names
Chemical formula IrO2
Molar mass 224.22 g/mol
Appearance blue-black solid
Density 11.66 g/cm3
27 more rows
The chemical name for Iridium(v) oxide is Ir02
What volume (in L) of carbon dioxide will be produced from the reaction of 37.4 L of oxygen?
Answers
Answer:
Maybe somewhere close to 12 L?
Pliss HELP ME only if you know the answer
Answers
Answer:
100 and 1 atm
Explanation:
I think the gas is given kinetic energy only from its temperature
In which location would the air most likely be at standard temperature and pressure?
Answers
Answer: B. above a bowl of ice water
Explanation: I got this right on Edmentum.
$4000 principal earning 6% compounded annually. what will the balance be after 6 years
Answers
Answer:
Compound Interest is calculated on the initial Principal for a given unit of time(yearly, half-yearly, quarterly), it also includes all of the accumulated interests of the previous period of a loan or deposit.
In this type of interest, the amount after the first unit time becomes the principal for the second unit and the amount after second unit time becomes the principal for the third unit and so on.
So the difference between the final amount and the principal is called Compound interest.
If the interest is compounded yearly:-
A=P(1+R100)n
Here A = final Amount
P = Principal
R = interest rate
n = time period
Compound interest = Final amount - principal
Given:-
Principal (P) = $4000
Interest Rate (R) = 6%
Time period (n) = 5 years
How would adding the catalyst nitrogen monoxide (NO) affect this reaction?
2SO2(g) + O2(g) → 2SO3(g)
A.
NO increases the rate at which SO3 molecules are formed.
B.
NO reacts with SO3 to produce more SO2 molecules.
C.
NO decreases collisions between the SO2 and O2 molecules.
D.
NO increases the concentration of the SO2 and O2 molecules.
E.
NO increases the activation energy of the SO2 and O2 molecules.
Answers
Answer:
Explanation: It would be option A
Answer:
The Correct Answer is A
Explanation:
The rate increases.
What happens when Mg forms an ionic bond?
O it gains one electron and becomes a -1 anion
O it loses one electron and becomes a +1 cation
o It loses 2 electrons and becomes a +2 cation
o It shares electrons with the other atom in the bond
ASAP please will mark as brainlist
Answers
Answer:
option 1st is correct gains 1 electron and becomes a-1.