Answers
6(-393.5) + 3(-285.8) -1(49) -15(0)
Related Questions
Why is there no answer
Answers
Answer:
i don't know
Explanation:
Students in a science class learn that groundwater is an important
source of drinking water for many communities. They construct a model
to study how leaking chemicals from a landfill can affect groundwater.
What is the most effective way for the students to see how leaking
chemicals from a landfill can enter a well?
Select one:
A: Pump water out of the well to see how stained water from the tissue paper
moves toward the well.
B: Drop food color into the well at the well's opening.
C: Tear some of the colored tissue paper and put the paper pieces into the well at
the well's opening
D: Tilt the tank towards the well and drain some of the water out of the tank.
Answers
Determine the molarity of a solution formed by dissolving 0.968 g of MgCl2in enough water to yield 150.0 mL of solution.
Answers
Answer:
M = 0.0678 M
Explanation:
Hello there!
In this case, since the molarity of a solution is obtained by dividing the moles by the volume, it is firstly necessary to compute the moles of magnesium chloride in 0.968 g, via its molar mass, as shown below:
[tex]n=\frac{0.968g}{95.21g/mol}=0.0102mol[/tex]
Next, since 150.0 mL in liters is 0.1500 L, according to the appropriate units, the resulting molarity is:
[tex]M=\frac{0.0102mol}{0.1500L}\\\\M=0.0678M[/tex]
Best regards!
Can someone please help me with this
Answers
What do dwarf planets, asteroids, and comets have in common
Answers
Answer:
Asteroids and comets have a few things in common. They are both celestial bodies orbiting our Sun, and they both can have unusual orbits, sometimes straying close to Earth or the other planets. ... While asteroids consist of metals and rocky material, comets are made up of ice, dust, rocky materials and organic compounds.
- How does melting point compare among molecular compounds and ionic compounds?
Molecular compounds tend to have lower melting points.
Molecular compounds tend to have higher melting points.
Both compounds have melting points within the same temperature range.
Answers
Answer:
The melting and boiling points of molecular compounds are generally quite low compared to those of ionic compounds. This is because the energy required to disrupt the intermolecular forces between molecules is far less than the energy required to break the ionic bonds in a crystalline ionic compound (Figure 6.2. 1) .
Explanation:
hopefully this helps :)
if not then here. (Most of the time, the melting points of ionic compounds are very high compared to the melting points of molecular compounds.)
Answer: A. Molecular compounds tend to have lower melting points
Explanation:
is my current answer correct? if not, please correct me
Answers
Answer:
Yes you’re correct :)
Explanation:
If the moon is half full on January 2, on approximately what date will it next become full?
A. February 15
B. February 2
C. January 31
D. January 9
Answers
Answer: don’t listen to him the answer is January 9
Explanation: jus took the test
Why would the presence of oxygen bubbles be a good indicator of photosynthesis occurring?
Answers
kdjsbjsof in bwjfiejwnjfifihdhwhbsd
what are 2 products of an acid base neutralization reaction
Water and NaCI
water and salt
a neutral solution and water
a different acid and base
Answers
Answer:
a different acid and base
Explanation:
help, please? What science law explains why there should always be the same type of elements on the reactant side as there are on the product side? What does this law state? (HINT: Answer both of these questions. A: The Law of _________________ states that _____________.)
Answers
Answer:
the law of conservation of energy states that energy neither created nor destroyed that means in a chemical reaction Mass reactants ( starting material)=tomass of produt
A swimming pool is 50 meters long. How long is a swimming pool in cm?
(100 cm = 1 m)
Answers
Answer:
5000 cm
Explanation:
100 cm = 1m
100 x 50 = 1 x 50
5000 cms = 50 meters
What is the volume of an object that has a mass of 5.80 g and a density of 6.35 g/mL?
Answers
Answer:
1.09 mL
Explanation:
Density is a measure of a substance's mass over its volume.
d = m/v
We can rearrange the equation to solve for volume, using algebra.
v = d/m
Therefore v = 6.35/5.80 = 1.09 mL
A wildfire destroys most of the plant life in a forest. What would most likely happen to the animals that lived in the forest?
Answers
Answer:
They would be pushed out and lose their homes
Explanation:
A wildfire destroys most of the plant life in a forest. Animals would be pushed out and lose their homes.
What is wildfire?An unplanned, uncontrolled, and unpredictable fire inside an area of flammable vegetation is known by several names, including wildfire, bushfire, bushfire, wildland fire, and rural fire. A wildfire may be more precisely referred to by the terms bushfire, desert fire, forest fire, hill fire, peatland fire, prairie fire, vegetable fire, or veld fire, depending on the kind of vegetation that is present.
Wildfires are separate from controlled and prescribed burning, which is a good human use of wildland fire, even though controlled burns have the potential to turn into wildfires. Wildfires likely started shortly after terrestrial plants first appeared, which occurred in the Silurian epoch 419 million years ago, according to fossil charcoal. A wildfire destroys most of the plant life in a forest. Animals would be pushed out and lose their homes.
Therefore, animals would be pushed out and lose their homes.
To know more about wildfire, here:
https://brainly.com/question/12110285
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A case of paper has a mass of 2000 g. A case of paper contains 10 reams of paper. One ream of paper is 500 sheets. What is the mass, in grams, of 50 sheets of paper?
Answers
Answer:
s8sooooosoossososososkdk
How Do OBJECTS BEGIN MOVING?
Answers
When a outside force acts upon it.
An atom has 5 protons in its nucleus that gives it a positive charge. What can be inferred about the number and position of other particles that make the atom electrically neutral? *
A. 5 neutrons are located inside the nucleus.
B. 5 electrons are located inside the nucleus.
C. 5 neutrons are located outside the nucleus.
D. 5 electrons are located outside the nucleus.
Answers
Answer:
D. 5 electrons are located outside the nucleus.
Explanation:
Protons have a +1 positive charge, electrons have a -1 negative charge. Protons are in the nuclues and electrons are orbiting in the electron cloud.
in today's pandemic,how can you protect our ozone depletion?
Answers
Answer:
if you want to protect our ozone depletion you have aerosol products that don't contain HCFCs and CFCs as stimulus or incitement
Explanation:
why you should use aerosol because when the liquid mixture is freeded or released from the aerosol the liquid propellant becomes a gas so this can easily break up the product into a fine haze or a mist hope its helpful have a good luck
1 When 25 cm of 1.0 mol/dmº copper sulfate solution was mixed vith an excess of zinc
powder, the temperature of the solution rose by 50.6 °C. Calculate the energy change
for the reaction in kJ/mol.
CuSO4(aq) + Zn(s) + Cu(s) + ZnSO4(aq)
?
Answers
Answer:
See explanation
Explanation:
From the formula for heat;
q (enthalpy change) = (mass of solution) x (specific heat capacity) x (temperature change)
Since the density and heat capacity of the solution are the same as that of pure water.
Mass of copper sulphate solution = 50 g
Heat = 50 * 4.18 * 50.6°C
Heat = 10575.4 J
Number of moles = 1 * 25/1000 = 0.025 moles
10575.4 J/ 0.025 moles = 432016 J/mol/1000
= 423 KJ/mol
or
q = - 423 KJ/mol
1. An atom is the
a. basic unit of matter
b. volume of a substance
c. amount of matter in an object
d. smallest object seen by the unaided eye
Answers
Answer:
A. Basic Unit Of Life.
Explanation:
Matter is made up of elements. Also, We have Atoms In our Body.
What is the density of a liquid that has a volume of 20.0 mL and a mass of 15.8 grams?
Answers
Answer:
D= 0.79 g/mL
Explanation:
Density= mass/volume
D= (15.8 g)/(20.0 mL)
D= 0.79 g/mL
which of the following is not found in cytoplasm
A.water
B.carbohydrates
C.salt
D.vitamins
Answers
Answer:
Carbohydrates
Explanation:
this is because cytoplasm is a substance that fills living cells.
Which statement below accurately describes the atoms of a specific element?An antimony, Sb, atom contains 122 protons inside the nucleus and 51 neutrons outside the nucleus.A manganese, Mn, atom contains 55 electrons outside the nucleus and 25 neutrons inside the nucleus.A chlorine, Cl, atom contains 35 electrons and 27 protons inside the nucleus.An arsenic, As, atom contains 33 protons inside the nucleus and 33 electrons outside the nucleus.
Answers
Answer: An arsenic, As, atom contains 33 protons inside the nucleus and 33 electrons outside the nucleus.
Explanation:
The protons are positively charged, electrons are negatively charged and neutrons has no charge (neutral). The protons and neutrons are present inside the nucleus and the electrons are located outside the nucleus.
Antimony (Sb) has an atomic number of 51 and thus contains 51 electrons and 51 protons. It has a mass number of 121 and thus conatins 70 neutrons.
Manganese (Mn) has an atomic number of 25 and thus contains 25 electrons and 25 protons.
Chlorine (Cl) has an atomic number of 17 and thus contains 17 electrons and 17 protons.
Arsenic (As) has an atomic number of 33 and thus contains 33 electrons and 33 protons.
Pl help it’s for a grade
Answers
Answer:
A
Explanation:
kinetic energy of a body at rest = 0
Which element is used in the treatment of patients with respiratory diseases in hospitals?
Answers
Answer:
I think the oxygen.
Answer:
Oxygen (O2)
Explanation:
The fundamental importance of oxygen to life on this planet ensures its place in the care of patients with respiratory disorders. Although now well established for hypoxic patients, many questions remain regarding the benefits of oxygen for varying severity and types of chronic lung disease.
What are the three major categories used to classify elements?
a Solids, liquids, gases
b Protons, neutrons, electrons
c Groups, periods, states
d Metals. non-metals, metalloids
Answers
Answer:
i think option no. " D " = " metals, non-metals, metalloids " is the correct answer.
hope this answer will help u.
have a great time
Hope this helped you!
Al derretirse los cubos de hielo cómo será ahora la fuerza de atracción con respecto a la fuerza de repulsión
Answers
Answer:
La fuerza de atracción en el hielo sólido, que es un compuesto molecular, se debe al enlace de hidrógeno (que es la fuerza intermolecular más fuerte) entre las moléculas individuales de agua, por lo tanto, el hielo sólido es bastante fuerte y se mantiene en una estructura rígida.
Cuando el hielo se calienta, las moléculas absorben suficiente energía y, en lugar de solo la vibración del hidrógeno dentro de un área muy pequeña, los enlaces de hidrógeno se doblan y se estiran, con los ángulos y la longitud de los enlaces oscilando dentro de los rangos esperados.
Como tal, las fuerzas de atracción en el agua líquida son menores que las del hielo y las fuerzas de repulsión entre cargas similares tienen un efecto mayor en la plasticidad del agua que el hielo.
Explanation:
How is Melting and Cooling of Rock like a Chocolate Bar?
Answers
Answer:
Melting and cooling of a rock is like a chocolate bar because, when chocolate melts, it happens with heat just like melting of a rock. When chocolate cools, it just becomes a solid with no heat just like rocks when becoming an igneous rock.
Explanation:
You can kinda re-phrase it if u want cause yea. hhah.
list out the effects seen inplants due to lack of phosphorus.
Answers
Answer:
Plants normally turn dark green and look stunted (both leaves and stalks). Older leaves are first affected and may become violet. Sometimes the brown tips of the leaves remain fragile and their maturity seems to be delayed.
Explanation:
it is what it is booiiii
THIS IS SCIENCE
PLEASE HELP
Answers
Answer:
An unbalanced force? .
Pls give me feedback if thats not right.