Answer:
Ba(NO₃)₂(aq) + Na₂SO₄(aq) ⇒ BaSO₄(s) + 2 NaNO₃(aq)
Explanation:
Let's consider the unbalanced double displacement equation for the reaction of an aqueous solution of barium nitrate and an aqueous solution of sodium sulfate.
Ba(NO₃)₂(aq) + Na₂SO₄(aq) ⇒ BaSO₄(s) + NaNO₃(aq)
To get the balanced equation, we will multiply NaNO₃(aq) by 2.
Ba(NO₃)₂(aq) + Na₂SO₄(aq) ⇒ BaSO₄(s) + 2 NaNO₃(aq)
Which two nitrogen bases pair together in DNA
A person standing waist-deep in a swimming pool may appear to have shorter legs then they actually have because of which process?
1. Refraction
2. Absorption
3. Diffraction
4. Reflection
Answer: Refraction
Explanation: i took the test
How many moles are present in 16 grams of carbon dioxide?
Answer:
n = 0.36 mol
Explanation:
We need to find number of moles present in 16 grams of carbon dioxide.
Let there are n number pf moles,
n = given mass/molecular mass
The molecular mass of carbon dioxide = 44 g/mol
So,
[tex]n=\dfrac{16\ g}{44\ g/mol}\\\\n=0.36\ \text{mol}[/tex]
So, there are 0.36 moles in 16 grams of carbon dioxide.
How can you make an item that is made of magnetic material become a permanent magnet instead of a temporary magnet? *
1.You can put it in a very strong magnetic field. 2.You can heat it while it is being influenced by a magnetic field. 3. You can leave it in the magnetic field of an actual magnet for a long time. 4. You can do any of the above.
You can put it in a very strong magnetic field.
Help me please) attached the screen below. Thanks
Answer:
1) d = 2.4 g/cm³
2) m = 25 g
3) v = 126.7 cm³
Explanation:
Given data:
Mass of material = 24 g
Volume of material = 10 cm³
Density of material = ?
Solution:
Formula:
d = m/v
by putting value,
d = 24 g / 10 cm³
d = 2.4 g/cm³
2) Given data:
Density of material = 5 g/cm³
Volume of material = 5 cm³
Mass of material = ?
Solution:
Formula:
d = m/v
5 g/cm³ = m / 5 cm³
m = 5 g/cm³×5 cm³
m = 25 g
3)Given data:
Density of material = 3 g/cm³
Mass of material = 380 g
Volume of material = ?
Solution:
Formula:
d = m/v
3 g/cm³ = 380 g / v
v = 380 g /3 g/cm³
v = 126.7 cm³
Type the correct answer in the box. Spell all words correctly.
What forms the backbone of a DNA strand?
A DNA molecule is made up of building blocks known as nucleotides. Each nucleotide consists of deoxyribose, a phosphate group, and one of the chemical bases. The nucleotides join together to form a _______
, which form the backbone of a DNA strand.
Which option shows the correct conversion of units from 3 L to mL?
3 L ∙ 100 mL1 L
3 L ∙ 1,000 mL1 L
3 L ∙ 1 mL100 L
3 L ∙ 1 mL1,000 L
Answer:
345
Explanation:
Which of these elements has the smallest atomic radius?
A. Se
B. Br
C. Ge
D. As
Answer:
Its Br on Ap ex
Explanation:
Just got it wrong ;( it's B
At low temperatures and high pressures ethene gas C2H4(g), does not behave like an ideal gas. Use chemical principles to explain why this is?
Answer:
The particles of an ideal gas have no volume and no attractions for each other. In a real gas, however, the molecules do have a measurable volume. The molecules of real cases have intermolecular attractions for each other.
An ideal gas behaves like a real gas under the conditions of low temperature and high pressure.
This is because at low temperature and high pressure molecules of gas will have negligible kinetic energy and strong force of attraction.
Thus ethene gas does not behave like an ideal gas at low temperatures and high pressures.
The particles of an ideal gas have no volume and no attraction for each other. In a real gas, however, the molecules have a measurable volume. The molecules of real gases have intermolecular attractions for each other. An ideal gas behaves like a real gas under conditions of low temperature and high pressure. This is because at low temperatures and high-pressure molecules of gas will have negligible kinetic energy and a strong force of attraction. Thus, ethene gas does not behave like an ideal gas at low temperatures and high pressures.
4. If the density of seawater at a depth of 10,000 m is 1.071 g/mL and a 25.0 g sample of water from that depth contains 99.7 mg K , what is the molarity of potassium ions in the sample
Answer:
0.11 M.
Explanation:
Hello!
In this case, since the molarity is computed as the moles of solute divided by the volume of solution in L, we first need to compute the moles of potassium in 99.7 mg as shown below:
[tex]n_K=99.7mgK*\frac{1gK}{1000mgK} *\frac{1molK}{39.1gK}=0.00255molK[/tex]
Moreover, given the density of the seawater (mixture containing the K and other solutes), we can compute the liters as shown below:
[tex]V=25.0g*\frac{1mL}{1.071g}*\frac{1L}{1000mL}=0.0233L[/tex]
Therefore, the molarity turns out:
[tex]M=\frac{0.00255mol}{0.0233L}\\\\M=0.11M[/tex]
Best regards!
All cells reproduce to produce new cells. How they
reproduce depends on the type of cell is being
produced. When you get a paper cut, your cells
reproduce by (4) to make new copies that are
the same as your old cells to heal. These skin cells
are (5)_and contain all your DNA. This is
different from your gametes, which are (6)
These cells are produced through the process of
(7). . The purpose of these cells is to ensure
that your children will have (8)_ __, and
not be identical to you.
Answer:
meiosis
Explanation:
Sex cells or gametes undergo a division process different from the rest of the cells, that is, they do not comply with mitosis but with meiosis, and this is because two cells (female and male gametes) have to fuse with their hemi load genetics to complete a new genetic code together.
Answer:
4) mitosis
5) chromatids
6) sex cells
7)meiosis
8) genetic variability
Explanation:
:P maTh
A scientist observes several different fossils in a
rock layer. Based on this observation, which is
the best conclusion?
A. The fossils are composed of lava that cooled
around several organisms.
B. The fossils formed about the same time as the
rock layer in which they were found.
C. The fossils formed after heat and pressure
changed the type of rock in the rock layer.
D. The fossils are composed of the same material
as the organisms from which they formed.
A scientist observes several different fossils in a
rock layer. Based on this observation, which is
the best conclusion?
Answer:A. The fossils are composed of lava that cooled
A. The fossils are composed of lava that cooledaround several organisms.
B. The fossils formed about the same time as the rock layer in which they were found.
Explanation:That's the right answer but you can choose one.
#CARRYONLEARNING #STUDYWELLTemperature and Heat are the same.
A. True
B. False
Explanation:
Heat is a measure of change, never a property possessed by an object or system.
Therefore, it is classified as a process variable.
Temperature describes the average kinetic energy of molecules within a material or system and is measured in Celsius (°C), Kelvin(K), Fahrenheit (°F), or Rankine (R).
Heat and temperature are two different quantities but they do rely on each other.
Hope it helps you!!Which of the following products would be counted in a countries GDP?
Answer:
consumption, investment, government consumption, and gross investment, and net exports.
Explanation:
What are 4 ways you can improve your skeletal system health?
Answer:
1. get vitamin c
2. get your bone mineral density tested
3. don't smoke or drink excessively
4. start weight-bearing exercise
Explanation:
helps improve skeletal system
Discuss the importance of Icaming social anthropology for university students
Answer:
what is the importance of anthropology as a student?
Social anthropology plays a central role in an era when global understanding and recognition of diverse ways of seeing the world are of critical social, political and economic importance. Social anthropology uses practical methods to investigate philosophical problems about the nature of human life in society.
Explanation:
how many moles are there in 3.80x10^22 molecules of CCI4?
image attached and will give brainliest
Answer:
0.0646 mole.
Explanation:
The following data were obtained from the question:
Number of molecules = 3.89×10²² molecules
Number of mole =?
The number of mole present in 3.89×10²² molecules of CCl₄ can be obtained as follow:
From Avogadro's hypothesis:
6.02×10²³ molecules = 1 mole
Therefore,
3.89×10²² molecules = 3.89×10²² molecules × 1 mole / 6.02×10²³ molecules
3.89×10²² molecules = 0.0646 mole
Thus, 0.0646 mole is present in 3.89×10²² molecules of CCl₄.
What is POH?
A. pH = log[OH-]
B. POH =[ht][OH-]
C. pOH = -log(OH)
D. pH = -log[H+]
Answer:
The answer is C
Explanation:
2.2.2: The pH Scale
pOH = -log[OH-]
Question 3 (1 point)
Consider the following unbalanced chemical equation representing the combustion of methane, yielding carbon dioxide and water.
CH4 + O2 --> CO2 + H20
If you had burned 800 g of methane, how many moles of Carbon dioxide would be produced?
A)122.22
B)8
C)2200
D)100
E)670
F)750
G)50
Answer:
Im pretty sure its B
Explanation:
Answer:
G) 50 mol
Explanation:
Given data:
Mass of methane = 800 g
Number of moles of CO₂ produced = ?
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Number of moles of methane:
Number of moles = mass/molar mass
Number of moles = 800 g/ 16 g/mol
Number of moles = 50 mol
Now we will compare the moles of methane and carbon dioxide.
CH₄ : CO₂
1 : 1
50 : 50
HELP BRAINLIEST Question 18
How many moles are in 20.0 g of CaCl2?
Link to Periodic Table of the Elements
0.180 mol
110.98 mol
5.55 mol
0.265 mol
Answer:
0.18mol
Explanation:
Given parameters:
Mass of CaCl₂ = 20g
Unknown:
Number of moles = ?
Solution:
To solve this problem;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of CaCl₂ = 40 + 2(35.5) = 111g/mol
Number of moles = [tex]\frac{20}{111}[/tex] = 0.18mol
please answer right need today not hard
Answer:
A
Explanation:
Describe and explain how molecules of oxygen behave when the temperature is so low that the oxygen becomes a liquid. ( This is science )
Please tell me
Answer/Explanation: Oxygen becomes liquid at -183°C.
Liquid nitrogen has a lower boiling point at −196 °C (77 K) than oxygen's −183 °C (90 K), and vessels containing liquid nitrogen can condense oxygen from air.
PLZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELLLLLLLLLP
Water changes from state to state in the water cycle. Which of the following best describes the process of the water cycle, which takes water from the clouds and drops it on the earth in the form of snow, sleet, hail, or rain?
A Transpiration
B Evaporation
C Precipitation
D Cloud Formation
Answer:
C. Precipitation
Explanation:
Answer:
Precipitation
Explanation:
In a genotype what does the lower case letter represent
Answer:
The lower case letter represents the recessive allele.
Explanation:
I just learned abt this today so im confident that this is correct
2. Phosphorus has an atomic number of 15, atomic mass of 31 and has a charge of -3. How many protons does Phosphorus has
Answer:
15
Explanation:
since atomic number=proton number so phosphorus has as proton number 15
Answer:
6.2
Explanation:
Help plz I ONLY GOT 2 mins left
Answer:
uhhh i don't know the experiment
put link and i might be able to help you
Explanation:
HELP ILL MARK BRAINLIEST PLS
Chemical compounds
A.
can be made up of a combination of different elements.
B.
are always made up of several atoms with the same number of protons.
C.
are always made up of one type of element and one type of atom.
D.
can be made up of one atom with several different elements in it.
Answer:
a.
can be made up of a combination of different elements.
A solution of 100.0 mL of 0.200 M KOH is mixed with a solution of 200.0 mL of 0.150 M NiSO4. (a) Write the balanced chemical equation for the reaction that occurs. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)
Answer:
2KOH(aq) + NiSO₂(aq) → K₂SO₄(aq) + NiOH₂(s)
Explanation:
This reaction is an example of a double-replacement reaction where the cations of two compounds exchange with its anions. In the reaction:
KOH(aq) + NiSO₄(aq)
There are produced K₂SO₄ and NiOH₂ salts (The last one is insoluble, its state is (s) but K₂SO₄ is very soluble, its state is (aq). The unbalanced reaction is:
KOH(aq) + NiSO₄(aq) → K₂SO₄(aq) + NiOH₂(s)
To balance the potassiums:
2KOH(aq) + NiSO₂(aq) → K₂SO₄(aq) + NiOH₂(s)And now, the reaction is balanced
PLEASE HELP DUE SOON
Answer:
This is all true if the atom has to be neutral.
Also what does V mean?
Helium: one shell with 2 neutrons and 2 protons in the center, with 2 electrons in the first shell.
Lithium: two shells with 4 neutrons and 3 protons in the center, with 2 electrons in the first shell, and 1 electron in the second shell.
Nitrogen: two shells with 7 neutrons and 7 protons in the center, with 2 electrons in the first shell, and 5 electrons in the second shell.
Flourine: two shells with 9 protons and 10 neutrons in the center, with 2 electrons in the first shell, and 7 electrons in the second shell.
Neon: two shells with 10 neutrons and 10 protons in the center, with 2 electrons in the first shell, and 8 electrons in the second shell.
Boron: two shells with 6 neutrons and 5 protons in the center, with 2 electrons in the first shell, and 3 electrons in the second shell.
In the sodium-potassium pump, sodium ion release causes two K ions to be released into the cell. __________________ True False
Answer:
false
Explanation:
As we know that in sodium-potassium pump .
sodium potassium move 3Na+ outside the cells
and moving 2k+ inside the cells
so that we can say that given statement is false
Answer FALSE
