Answer:
the molecules in the reactants interact to form new substances.
Explanation:
need help with these three questions!!!
Answer:
6. In order from left to right the balanced coeficcients are,
6, 1, 2, 3
8. [tex]C_{7}H_{10}_{(l)}+6H_{(g)}=C_{7}H_{16}_{(l)[/tex]
9. In order from left to right the balanced coeficcients are,
1, 11, 7, 8
help is science, if you don't know the answer just don't put anything /:
Answer:
Light
Explanation:
Light is a good example of invisible particles. We cannot see light particles aka photon. We only know the light is present by the objects we see. Because we can only see objects when light reflects from them on our eyes.
[I could only think of one example if I can remember one more I'll edit it down]
How many Cl- bond with one Na+ ion?
A 0.85% saline solution is: a.8.5 mL of saline added to 91.5 mL of water b.85 g of NaCl made up to 1,000 mL of water c.0.85 g NaCl made up to 100 mL of water d.8.5 g NaCl in 100 mL of water
Answer:
c
Explanation:
A 0.85% saline solution would consist of 0.85 g NaCl made up to 100 mL of water.
A 0.85% saline solution contains 0.85% by weight of NaCl. Hence, in order to prepare such a solution, 0.85 g of NaCl is weighed out into a beaker or cylinder and distilled water is added up to the 100 mL mark. On the other hand, 8.5 g of the NaCl can be weighed out and then distilled water added to 1000 mL mark.
The correct option is, therefore, c.
The model below shows a part of a human body's muscular system.
Muscles are organs that make movement possible. Which organ system is responsible for controlling muscular movement?
A. Endocrine system
B. Skeletal system
C. Nervous system
D. Digestive system
Answer:
you must go to jones im doing the same test
Explanation:
Which value indicate the strongest base
A. pH of 2
B. pH of 5
C. ph of 12
D. pH of 8
Explanation:
The highest number is the strongest base. Therefore the pH of 12 is the strongest base here (C).
PLEASEEEE I NEED HELPP
Write the reaction for the decomposition of sodium hydrogen carbonate to form sodium carbonate, water and carbon dioxide.
Answer:
Na2O + CO2 >> Na2CO3
Explanation:
Balanced. Single displacement, I think. SYNTHESIS
I think this is Right im not an expert so
Plz answer the question
Answer:
Equation:
p + 8p = 63
9p = 63
Divide both sides by 9:
p = 7
The parakeet weights 7 ounces.
Weight of fish:
The fish weights 8 times as much as the parakeet, or 8 * 7 = 56 ounces
The fish weights 56 ounces.
Explanation:
When a car burns gas most of the energy is lost as heat. This inefficiency of energy transfer is an example of which law of energy?
A. second
B. fourth
C. first
D. third
Answer:
C) first
Explanation:
What pieces of evidence do scientists use to support the current theory of rapid expansion?
Answer:
When looking at the radiation emitted by distant stars or galaxies, scientists see emission spectra 'shifted' towards the red end of the electromagnetic spectrum—the observed wavelengths are longer than expected. ... Something causes the wavelength of the radiation (emitted by faraway stars and galaxies)
When a mixture of oxygen and hydrogen is ignited in a test tube, the reaction shown occurs. Hydrogen + Oxygen → Water + Energy Substances that form as a result of a chemical reaction are called catalysts catalysts products products precipitates precipitates reactants
Answer:
products
Explanation:
In chemistry, chemical reactions is the combination of two or more substances to yield other substances. The substances that react is called REACTANTS while the substances formed after the reaction is called PRODUCTS.
According to this question, a mixture of oxygen and hydrogen is ignited in a test tube as follows:
Hydrogen + Oxygen → Water + Energy
In this reaction, the substances being combined (usually found on the left side of the equation) are hydrogen and oxygen. Hence, oxygen and hydrogen are REACTANTS. Also, the substances produced as a result of the reaction is water (H2O). The PRODUCTS of the reaction is WATER.
Answer:
Soy isk polq ja uso??
Explanation:
Na uend qoaki uwsh.. aju qah!
Which compound has both ionic and covalent bonding? *
Ethanol
Glucose
Calcium carbonate
Dichloromethane
Answer:
Calcium carbonate
Explanation:
Ionic compounds that tend to have one or more polyatomic ions are the ones that tend to exhibit both ionic and covalent bonding. The only one that meets this is calcium carbonate.
It may be harmful when people compete to see who can hold their breath the longest underwater. Without oxygen, brain cells *
Answer: Without oxygen, brain cells cannot make enough ATP.
Explanation:
Hypoxia is a condition that occurs due to low levels of oxygen. In conditions such as holding of breath for a long period of time, the oxygen carrying haemoglobin ( oxyhaemoglobin) breaks down, releasing oxygen to the body tissues, which constantly consumes oxygen keeping the levels low.
In the presence of decreased oxygen supply, autoregulatory mechanisms that control the blood flow to the brain by adjusting the diameter of the arterioles fails. The consequent rapid decrease in the cerebral blood supply leads to hypoxia and lack of glucose( decreased ATP production). If severe hypoxia is sustained for more than a few minutes, this could lead to irreversible brain damage.
Therefore, It may be harmful when people compete to see who can hold their breath the longest underwater.
Without oxygen, brain cells die as a result of the cells being unable to
metabolize glucose.
The brain is an important organ that controls almost all the activities that
takes place in the body. They have cells which converts the glucose to
energy which is needed for day to day activities.
When there is no oxygen, glucose isn't metabolized and energy is deficient.
The brain cells won't be able to function and then causes its cells to die
thereby resulting in brain damage.
Read more on https://brainly.com/question/20333433
Need help with this.
Answer:
18.2 g.
Explanation:
You need to first figure out how many moles of nitrogen gas and hydrogen (gas) you have. To do this, use the molar masses of nitrogen gas and hydrogen (gas) on the periodic table. You get the following:
0.535 g. N2 and 1.984 g. H2
Then find out which reactant is the limiting one. In this case, it's N2. The amount of ammonia, then, that would be produced is 2 times the amount of moles of N2. This gives you 1.07 mol, approximately. Then multiply this by the molar mass of ammonia to find your answer of 18.2 g.
what are two atoms if hydrogen?
Answer:
ummm molecules i have no idea- i tried tho..
Explanation:
is known as a diatomic element hydrogen is the lightest element has an atomic number of one uses the symbol H at standard temperature and pressure hydrogen is an odorless and colorless gas it is combustible and produces water when it burns in air hydrogen is also the most abundant element in the universe with 90% of atoms in the universe being made of hydrogen main sequence Stars such as the sun burn hydrogen as fuel
help me pleaseee, if you do tyy :)
0.485 moles BaSO4 is equal to how many grams of BaSO4?
___ grams BaSO4
By adding electrons to an uncharged object, the object *
becomes negatively charged
becomes positively charged
becomes energized
changes color
Answer:
becomes negatively charged
Explanation:
this is because when an object receives electrons it becomes negatively charged and the object that loses electrons becomes positively charged.
Answer:
First one because by adding more electrons it makes something more negative. So it becomes negatively charged
How do waves travel through space?
Explanation:
Electromagnetic waves are waves which can travel through the vacuum of outer space. Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has both an electric and a magnetic component.
What type of liquid is sucrose solution? (Salt solution, weak acid, etc)
Sucrose solution is an example of sugar solution. Details about a solution can be found below.
What is a solution?A solution is a mixture, which may be liquid, gas or solid, formed by dissolving one or more substances.
A solution is formed when a solute substance dissolved in a solvent.
For example; sucrose is a solute molecule that dissolves in water to form a sucrose solution.
It is important to note that sucrose solution is hypertonic to water i.e. it is a more concentrated solution. There is a net movement of water molecules, by osmosis from the water outside to the sucrose solution.
Learn more about solution at: https://brainly.com/question/3850162
#SPJ1
what has 16 protons and -2 charge? PLEASE NEED IT FOR FINALS FOR CHEMISTRY!!
Answer:
Sulfur
Explanation:
it has 16 proton and 2- charges
As you move down a group, you will recall that the radius increases. Why do you think an increase in atomic radius would result in a lower ionization energy?
Answer:
Because as we move down the group size/ radius of atom increases due to increase in shells and screening effect. The hold of nucleus on valence electrons decreases and effective nuclear charge decreases so it is easy to remove electron from greater sized atoms as compared to smaller sized aroms.
Energy required to remove electron is ionization energy so greater sized atoms have low ionization energy.
Explanation:
Which transformations in the rock cycle require heat? Select all that apply.
Igneous rock to metamorphic rock
Metamorphic rock to sedimentary rock
Metamorphic rock to igneous rock
Sedimentary rock to metamorphic rock
Igneous rock to sedimentary rock
Answer:
Igneous rock to metamorphic rock
Metamorphic rock to igneous rock
Sedimentary rock to metamorphic rock
Explanation:
In changing a rock through the listed processes heat is highly required.
Transformation from a rock to igneous rocks requires the most heat because the rock body must be molten.
Igneous rock to metamorphic rock is a metamorphic change that requires significant heat and pressure. The mineralogical fabric is affected by this change. In moving from metamorphic to igneous rock, the melting temperature of a rock must be attained in order for magma to form. Sedimentary changes to metamorphic rocks also require heat.What type od chemical reaction is the example below?
2 H2O2
2 H2O + O2
a
synthesis
combination
decomposition
single replacement
С
Answer:
Decomposition
Explanation:
One reactant has formed two products
The length of a year is equivalent to the time it takes for one.. (pls help I honestly forgot )
MULTIPLE CHOICE QUESTION
Gain or Lose
Magnesium (Mg) has 2 valence electrons. Will
the Mg atom gain or lose electrons to form an
ion?
• Elements > 4 valance e-
gain e-
• Elements < 4 valance e-
lose e-
Neither
Lose
Gain
If 56 grams of nitrogen is mixed with 56 grams of oxygen, what is the pressure of each gas if the total
pressure is 1320 Torrs?
Answer:
pN₂ = 695 torr; pO₂ = 625 torr
Explanation:
Step 1: Calculate the moles of each gas
The molar mass of N₂ is 28.01 g/mol.
56 g × 1 mol/28.01 g = 2.0 mol
The molar mass of O₂ is 32.00 g/mol.
56 g × 1 mol/32.00 g = 1.8 mol
Step 2: Calculate the total number of moles
n = nO₂ + nN₂ = 1.8 mol + 2.0 mol = 3.8 mol
Step 3: Calculate the partial pressure of each gas
We will use the following expressions.
pN₂ = P × X(N₂)
pN₂ = 1320 torr × (2.0 mol/3.8 mol)
pN₂ = 695 torr
pO₂ = P × X(O₂)
pO₂ = 1320 torr × (1.8 mol/3.8 mol)
pO₂ = 625 torr
Find the product 78.3 times 0.45
Please help :(
Answer:
35.235
Explanation:
I plugged 78.3x0.45 it into a calculator
An object at rest has equal forces acting on it. This can be described as a(n) ______ force.
Answer:
it would be balanced forces.
Explanation:
Balanced forces acting on an object do not change the objects motion.
The green pigment required for photosynthesis is:
A. glucose
B. chloroplast
C. chlorophyll
D. carbon dioxide
