Answer:
it should be chemical
Explanation:
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?
Answer:
10.0 should be your answer
Explanation:
I have had this before unless of course they changed it
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
I think the answer is number (4)
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
Answer:
option 1st is correct gains 1 electron and becomes a-1.
In which location would the air most likely be at standard temperature and pressure?
Answer: B. above a bowl of ice water
Explanation: I got this right on Edmentum.
What is the ultimate goal of reproductive strategies?
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.
why cant you ice skate on a lake when it is not frozen
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
5.
Inner shell electrons are not shared between atoms when they form
chemical bonds.
1.TRUE
2.FALSE
Yes, the statement is true because chemical bonds formed by sharing or transferring outermost electrons of an atom.
Why inner shells are not shared?Inner shell electrons are not shared between atoms when they form chemical bonds but the outermost electrons can form bonds with the atoms because they are easy to lose and share.
So we can conclude that the statement is true because chemical bonds formed by sharing or transferring outermost electrons of an atom.
Learn more about bonds here: https://brainly.com/question/25965295
#SPJ1
please help im failing
Answer:
the second one
Explanation:
because there are 3 of Na and one N
Glycerine is viscous than water?why
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.
What is the chemical name for Iridium(V) Oxide?
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
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?
hojbiuhok.
Explanation:
.;..........hv
This is science talking about rocks
extrusive
or
Intrusive
To dissolve in water, zinc (Zn) should form a compound with
chloride (CI– ).
carbonate (CO32–).
hydroxide (OH– ).
phosphate (PO43–).
Answer:
carbonate i think
Explanation:
Answer:
Its Chloride
Explanation:
because im cool
What is the physical state of substance in a chemical reaction? What are the symbols of physical state?
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.
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
What charge would you expect for an formed by P?
O +2
O-2
O +3
w
Look at picture
ASAP please will mark as brainlist don’t got much time
Answer:
friend according to the question the answer is +3 ....
How many moles are in 2.3 grams of phosphorus? show work
Answer:
0.074 moles
Explanation:
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
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?
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).
4 points
Looking at the periodic table which way do we label the groups, which
way do we label the periods?
The vertical columns are groups
The horizontal rows are periods
Explanation:
groups are the vertical rows of element and each group have the same no of valence electron
periods are the horizontal row of element on the basis of no of orbital
What is the molecular formula of the following compound: NH_CI, molar mass = 51.5 g/mol?
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?
Identify one way Ultra Violet Rays can be harmful to humans? Thank you so much!
Answer
It can Blind humans
Explanation:
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
Which particle is NOT part of an atom?
Answer:
Magnetic Domain
Explanation:
An atom consists of nucleus and electrons revolving around it.
Nucleus is filled with proton and neutron.
So atom consists of electron, proton and neutron.
The magnetic domain is not present in an atom.
For an electron with angular (azimuthal) quantum number ℓ = 2, the magnetic quantum number m can have
Answer:
-2, -1, 0, +1, +2
Explanation:
The quantum numbers describe the quantum state of an electron in an atom. These numbers are symbolized as n, l, m, and s. There are rules for the combination of these numbers. The angular quantum number (ℓ) is related to the magnetic number (m): if ℓ is equal to a number a, thus m can be any integer number between - a and +a.
According to this rule:
If ℓ = 2, thus m can be have a value of an integer between -2 and +2 ⇒ -2, -1, 0, +1, +2
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
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.
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.
Answer:
B is the Bohr model of atom
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.
Answer:
Explanation: It would be option A
Answer:
The Correct Answer is A
Explanation:
The rate increases.
how many moles are in 5g of Na2CO3?
a) 0.047
b) 1
c) 2
d)21.2
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:
Pliss HELP ME only if you know the answer
Answer:
100 and 1 atm
Explanation:
I think the gas is given kinetic energy only from its temperature