Answer:
there would be chemicals on the food.
Explanation: Hope this helps :)
How do chemical reactions turn substances into new substances?
help! how do chemical reactions turn substances into new substances?
Answer:
I think it's B.
All can change the Earth slowly and gradually except
A. erosion
B. weathering
C. melting rock
D. earthquake
Answer:
D. Earthquake
Explanation:
I think earthquake because the question is asking for SLOW changes and an earthquake is kind of a sudden change...so yeah.
Hope this helps :D
Why does reducing oil pollution in the oceans require an international effort?
Humans do not have the resources to stop ocean pollution.
Half of Earth’s oceans are not owned by any particular country.
Natural occurrences cause far more ocean pollution than human activities.
Cleaning oil pollution requires approval from the United Nations.
Answer:
Half of Earth’s oceans are not owned by any particular country.
Explanation:
Reducing oil pollution requires an international effort because ocean waters do not have boundaries and there are certain portion of the ocean that are not owned by any nation.
Oil pollution is a serious environmental issue. Oil spills can be carried by ocean currents from one place to another. They affect the aquatic ecosystem within a locality thereby reducing the biodiversity of life.International collaborations are sought to combat any issue of oil spillage due to global undertone to it.
The balanced chemical equation below shows the combustion reaction of butane (C₄H₁₀). What is the mole ratio of butane (C₄H₁₀) to carbon dioxide (CO₂)? *
[tex]2C_{4}H_{10} + 13O_{2} --\ \textgreater \ 8CO_{2} + 10H_{2}O[/tex]
2:8
13:8
13:10
1:5
A solution with a pH of 5 is ___ times as acidic as a solution with a pH of 6
Answer:
logarithmic
Explanation:
What is the probability of a
short plant in the cross
between a Tt and a tt plant?
Calculate the number of formula units in 1.87 mol of NH4Cl
a
1.13 x 1024 NH4Cl
b
1.88 x 1023 NH4Cl
c
6.75 x 1024 NH4Cl
d
1.12 x 1024 NH4Cl
Answer:
c is your answer
Explanation:
So, 53.49 g (M) of NH4Cl N H 4 C l contains 14.01 g (m) of N . So, the mass percent of nitrogen in NH4Cl N H 4 C l is 26.19%.
CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + CO2 (g) + H20 (1)
In the chemical reaction above, what states are CaCO3 and
H2O in, respectively?
a) Aqueous, Solid
b) Gas, Liquid
c) Gas, Aqueous
d) Solid, Liquid
e) Solid, Aqueous
Answer:
solid and liquid state respectively
Answer:
A - solid, liquid
Explanation:
ur welcome
which kind of substances get involved in a double displacement reaction?
A) only elements
B) covalent compounds
C) ionic compounds
Answer:
C) ionic compounds
Explanation:
Only ionic compounds takes place in a chemical double displacement reaction.
The reaction involves an actual exchange of partners to form a new compounds.
These compounds involved are ionic compounds.
there is usually the formation of an insoluble compound called precipitatethere is formation of water or any other non-ionizing compoundthere is liberation of a gaseous productCalculate the density of chloroform
Answer: The density of chloroform is 1.47 g/mL
Explanation : Given,
Volume = 40.5 mL
Mass of cylinder = 85.16 g
Mass of cylinder and liquid = 145.10 g
First we have to calculate the mass of liquid (chloroform).
Mass of liquid = Mass of cylinder and liquid - Mass of cylinder
Mass of liquid = 145.10 g - 85.6 g
Mass of liquid = 59.5 g
Now we have to calculate the density of liquid (chloroform).
Formula used:
[tex]Density=\frac{Mass}{Volume}[/tex]
Now putting g all the given values in this formula, we get:
[tex]Density=\frac{59.5g}{40.5mL}[/tex]
[tex]Density=1.47g/mL[/tex]
Therefore, the density of chloroform is 1.47 g/mL
4 What is the maximum number of students among whom 125 oranges, 150 citrus
and 225 guavaes can be equally divided? What is share of each fruit for a student?
Find it.
Answer:
25
Explanation:
fing the highest common factor
pime factorisation:
125=5×5×5
150=2×3×5×5
225=3×3×5×5
find the common numbers in all prime numbers
》5×5=25
Do the molecules of a liquid have (more, less, or the same) freedom of movement as the molecules of a gas? *
An oxide of trivalent metal contains 32% of oxygen. Calculate the atomic mass of the metal.
The atomic mass of the metal.(M) = 51 g/mol
Further explanationGiven
32% of oxygen
Required
the atomic mass of the metal.
Solution
An oxide of trivalent metal : M₂O₃(Ar O = 16 g/mol)
The molar mass of metal oxide = 2M+16.3=2M+48
32% of oxygen, then :
32% x 2M+48 = 48
0.32(2M+48)=48
0.64M+15.36=48
0.64M=32.64
M=51
Explain why smell is a physical property?
Answer:
because no chemical change is happening
Explanation:
How is the weather in the two cities pictured most likely going to change in the next 24 hours
Answer:
theres no picture
Explanation:
Acetylene gas, C2H2, is used as a fuel in welding torches. How many acetylene molecules are
in a cylinder that delivers 1400 L of acetylene at STP?
Answer:
375.8 × 10²³ molecules
Explanation:
Given data:
Number of molecules of acetylene = ?
Volume of cylinder = 1400 L
Temperature = standard = 273.15 K
Pressure = standard = 1 atm
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
PV = nRT
1 atm × 1400 L = n × 0.0821 atm.L/ mol.K × 273.15 K
1400 L.atm = n × 22.43 atm.L/ mol
n = 1400 L.atm / 22.43 atm.L/ mol
n = 62.4 mol
1 mole contain 6.022 × 10²³ molecules
62.4 mol × 6.022 × 10²³ molecules / 1 mol
375.8 × 10²³ molecules
Which formula can be used to calculate the molar mass of water (H2O)?
Answer:
One mole of H2O is made up of 2 moles of Hydrogen atoms and 1 mode of Oxygen atom. Mass of two moles of Hydrogen atoms = 2x1 g/mol. Mass of one mole of water = 2 g/mol + 16 g/mol = 18/ mol.
Explanation:
I majored in Chemistry
CAN YOU EXPLAIN?
Which structures distinguish cells in multicellular plants and
animals from those of unicellular organisms, and why are
cells important for identifying organs and their functions?
Answer:
Explanation:
Outer skin cells form flattened stacks that protect the body from the environment. Muscle cells are slender fibers that bundle together for muscle contraction. The cells of multicellular organisms may also look different according to the organelles needed inside of the cell.
A solution has a pOH of 12.4. What is the pH of this solution?
Answer:
pH = 1.6
Explanation:
pH + pOH = 14
=> pH + 12.4 = 14
∴ pH = 1.6
pls mark it as the brainliest
name some animals and plants that live on land?
please mark as brainliest
Answer:
cats, ants, spiders, elephants, porcupine, tiger, kangaroo, and ostrich. Mosses, hornworts, liverworts, lycophyte, seed plants, pteridophytes, and archaeopteridales.
Explanation:
Of which substance would an adult be able to consume the largest quantity before experiencing life-threatening effects?
Your answer:
botulinum
acetaminophen
sugar
water
salt
Answer:
Water
Explanation:
hope that helps:)
please help!!!
Decide which molecules in the simulation will represent the substances from the actual reaction. Include a strategy to deal with the difference in structure between the actual reaction N2 + 3H2 ⇌ 2NH3 and the simulated reaction. Not all molecules need to be used.
Answer:
I FINNALY GOT MY HANDS ON THE AWNSER, dont
copy word for word though Explanation:
Simulation of a reaction is a chemical reaction modeling or demonstration tool, using various software to better understand the molecular structure and the physical and chemical properties of the molecule. Here the actual reaction is N2 + 3H2 -----> 2NH3. In the simulation reactions, the nitrogen and hydrogen molecules in the actual reaction are described by different colored circles or dots and the bonds are produced using a single, double or triple line that touches each molecule and gives an appearance like the reactants and the products' ball and stick model. Example: Molecule of nitrogen as o---triple line---o. A molecule of hydrogen as O———O. Chemical symbols such as N and H are expressed in Actual Chemical Reaction, N2 and H2 and the bonds are represented by single, double or triple lines that do not impact the atoms in the molecule as follows: Nitrogen Molecule: N -triple Bond- N. Hydrogen Molecule: H - H.
Mastering Problems
Balancing Chemical Equations (10.1)
71. Write skeleton equations for these reactions.
a. hydrogen iodide(g) → hydrogen(g) + iodine(g)
b. aluminum(s) + iodine(s) — aluminum iodide(s)
c. iron(II) oxide(s) + oxygen(g) -> iron(III) oxide(s)
a. HI(g) ⇒ H₂9g) + I₂(g)
b. Al(s) + I₂(s)⇒AlI₃(s)
c. FeO(s)+O₂(g)⇒Fe₂O₃(s)
Further explanationGiven
word equations
Required
skeleton equations
Solution
The skeleton equation shows the chemical formula of the reaction between reactants and products, regardless of the actual amount of the reacting compound (unbalanced reaction)
The skeleton equations :
a. HI(g) ⇒ H₂9g) + I₂(g)
b. Al(s) + I₂(s)⇒AlI₃(s)
c. FeO(s)+O₂(g)⇒Fe₂O₃(s)
Can someone pleaseeee help if you’re correct I’ll give u brainlist
Answer:
I think it the second one adding external weight or the third one
Explanation:
I could never. im more like the last one
I'm really sorry if this was no help
Determine the number of electrons in the Cu2+ ion.
Answer: 27 electrons
copper has 29 protons in its nucleus. atoms can only lose or gain electrons. so because copper has 29 protons and will always have 29 protons, and the Cu2+ ion has a positive charge, there are more protons than electrons.
that means there should be 2 less electrons than protons. that leaves us with 29 protons and 27 electrons.
hope this helps :)
What is the mass of 4.50 moles of magnesium chloride, MgCl2?
Answer:
427.5g
Explanation:
Given parameters:
Number of moles = 4.5moles
Unknown:
Mass of MgCl₂ = ?
Solution:
To solve this problem;
Mass = number of moles x molar mass
Molar mass of MgCl₂ = 24 + 2(35.5) = 95g/mol
Mass = 4.5 x 95 = 427.5g
b- How many electrons does sodium have?
Answer: sorry I’m late but it is 11 electrons
Explanation:
Look at this image.
C is written in the middle and O is written on the left and right of C with four dots around each O. Two straight lines are drawn between C and each O.
What do the lines in this image represent?
Non-bonded valence electrons of oxygen
Valence electrons donated in carbon dioxide
Ionic bonds between carbon and oxygen
Double covalent bonds in carbon dioxide
Answer:
double covalent bonds in carbon di oxide
Carbon dioxide is a covalent compound formed by carbon and oxygen. There are two covalent double bonds between carbon and each oxygens. Thus option d is correct.
What is covalent bond?Covalent bond is a type of bond formed by the sharing of electrons between two atoms. Whereas, ionic bond is formed by lose or gain of electrons. Covalent bond is weaker than the ionic bond.
Carbon contains 4 electrons in its valence shell. Thus it needs 4 more electrons to attain stability. Oxygen contains two electrons in its valence shell and thus it needs 2 more electrons to become stable
A double bond is formed when two electrons are shared between two atoms. Thus, oxygen shares its two electron with carbon. And the second oxygen also shares its two electrons. Thus carbon attain 4 more electron and become stable.
Carbon shares its two electron with one oxygen and other two electron with the second oxygen thus, make each oxygen attains octet and become stable. Thus, the two straight lines between carbon and oxygen is double covalent bonds.
To find more about covalent bonds, refer the link below:
https://brainly.com/question/19382448
#SPJ2
How many molecules are in a gram?
Answer:
well, u can figure that out by multiply that amount by Avocado's number, which is 6.022x10 to the power of 23
How are plants and animals the
they different?
same? How are
Answer:
Plants and animals have different cell types, one is a autotroph and one is a heterotroph, plants can use photosynthesis and animals cannot.
Explanation: