Answer:
Ca 4, O 8, H 8, did this help
Nine atoms make up the chemical calcium nitrate, containing one each of calcium, nitrogen, and six oxygen atoms. 4Ca(NO3)2 contains 36 atoms in total.
What word best describes the number four in the phrase 4CA(NO3)2?Here, there are Four calcium nitrate molecules.The chemical equation 4 Ca + 10 HNO3 4 Ca(NO3)2 + NH4NO3 + 3 H2O has been solved and balanced with the finished products.Ca(NO3)2 is the formula for this substance. Calcium nitrate contains one calcium atom, two nitrogen atoms, and six oxygen atoms.Enter a chemical formula to get its elemental makeup and molar mass: 4Ca(NO3)2*H2O has a molar mass of 674.3665 g/mol.Calcium nitrate is a chemical compound made composed of nine atoms, including one each of calcium, nitrogen, and six oxygen atoms.Consequently, 4Ca(NO3)2 has = 4*9 = 36 atoms overall.To learn more about Calcium nitrate refer to:
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What is a primary difference between bacteria that are
in the kingdom Archaea and other bacteria?
Answer:Both atractive and repulsie
Explanation:
Do you think this one experiment is enough to change the scientific theory regarding the speed of light?
No. The speed of light does change. You mean speed of light in a vacuum. Measuring that value is elementary, in a 2-way measurement, as you show.
write out the products that would be created during this neutralization reaction H2SO4 + Cu(OH)2
Answer:
H2SO4+CU(OH)2 = CUSO4+2H2O
The general neutralization reaction between an acid and a base takes the form: acid + base → salt + water.
If you have some acid HA neutralizing some base BOH, the salt would be an ionic compound composed of the conjugate acid of BOH (i.e., B⁺) and the conjugate base of HA (i.e., A⁻).
Applied here, H2SO4 and Cu(OH)2 would react to form a salt CuSO4 (the Cu²⁺ ions coming from the copper(II) hydroxide and the SO4²⁻ ions coming from the sulfuric acid) and H2O.
Thus, the products of this neutralization reaction would be copper(II) sulfate (CuSO₄) and water (H₂O).
The balanced equation for this reaction would accordingly be:
H₂SO₄ + Cu(OH)₂ → CuSO₄ + 2H₂O.
Why does everyone keep saying I should call Uraraka “red cheeks” instead of “pink cheeks” (=_=)
i dont know man they're weird
Which describes the substances that form covalent bonds?
A. a metal and a metalloid
B. a metal and a nonmetal
C. two nonmetals
D. two metals
What do you think is the primary reason why the Unionid mussel population declined whenever there is a dramatic increase in the Zebra mussel
Answer:
When the Zebra arrived they ate all the food so the Unionid mussels declined as they died from the lack of food. Causing the Zebra Zebra numbers to increase and Unionid numbers to decline.
Vectors are arrows that tell us two things about force...WEIGHT and DIRECTION
True
False
how many moles of Si are in 78.0 grams of silicon
Answer:
[tex]\boxed {\boxed {\sf 2.78 \ mol \ Si}}}[/tex]
Explanation:
To convert from grams to moles, we must use the molar mass. This number can be found on the Periodic Table.
Si (Silicon): 28.085 g/molWe can use number as a ratio.
[tex]\frac { 28.085 \ g \ Si}{ 1 \ mol \ Si}[/tex]
Multiply by the given number of grams.
[tex]78.0 \ g \ Si *\frac { 28.085 \ g \ Si}{ 1 \ mol \ Si}[/tex]
Flip the fraction so the grams of silicon cancel.
[tex]78.0 \ g \ Si *\frac {1 \ mol \ Si }{ 28.085 \ g \ Si}[/tex]
[tex]78.0 *\frac {1 \ mol \ Si }{ 28.085 }[/tex]
[tex]\frac {78.0 \ mol \ Si }{ 28.085 }= 2.77728324729 \ mol \ Si[/tex]
The original number of grams (78.0) has 3 significant figures, so our answer must have the same. For the number of moles calculated, that is the hundredth place. The 7 in the thousandth place tells us to round the 7 to a 8.
[tex]2.78 \ mol \ Si[/tex]
There are about 2.78 moles of silicon in 78.0 grams.
Which of these can be used as an inert electrode?
copper
platinum
silver
zinc
Answer:
I believe it is platinum
Explanation:
I think it is, haha
Answer:
zinc
Explanation:
kwkejnrkewnrkwe
True or False vacuoles direct cell activities by sending instructions to different parts of an animal cell
Answer:
False
Explanation:
The nucleus controls the cells activities
In your own words, describe the process of convection.
Answer:
the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat
Explanation:
<3
Answer:
Convection when heat travels through metal or appliances.
Explanation:
Which of the following statements describes the elements within a row of the periodic table?
A. They are in the same family.
B. They have the same or nearly the same properties.
C. They have the same average atomic mass.
D. They have properties that change in a pattern.
What is the volume of 55 grams of carbon dioxide at STP
A. 2.45 L
B. 28 L
C. 1.25 L
D. 12.5L
Answer:
A. 2.45 L - Answer my answers is right.
A 4-liter container at 25 degrees Celsius contains 2.0 grams of He gas. What is the pressure inside the container?
Answer:
3.06 atm
Explanation:
Using general gas law equation as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (litres)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK
T = temperature (K)
According to the information provided in this question, V = 4L, T = 25°C = 25 + 273 = 298K, n = ?
Mass of He gas = 2.0g
Using mole = mass ÷ molar mass
Molar Mass of He = 4g/mol
mole = 2/4
mole = 0.5mol
Using PV = nRT
P = nRT/V
P = 0.5 × 0.0821 × 298 ÷ 4
P = 12.233 ÷ 4
P = 3.06 atm
Hence, the pressure inside the container is 3.06atm.
Pls help will give brainlist
Answer:
B
Explanation:
H2O is 2 hydrogen atoms, 1 oxygen atom. H2+O2 would yield H2O2, not H2O. The balanced equation is 2H2+2O2=2H2O
what is 15 /2.343*233+2341
if you are reading this you like the person you are sitting beside or just beside or will sit beside next.
Answer:
3832.67
Explanation:
Calculate the mass of potassium in 500g of potassium sulfate?
Answer:
174.94
Explanation:
Can you please help me !!
Answer:
Explanation:
A) O2 (non polar covalent)
B) HF (polar covalent)
C) NaCl (because its ionic)
im not 100% sure hope it helps
Calculate the ratio of H+ ions to OH– ions at a pH = 6. Find the concentration of H+ ions to OH– ions listed in Table B of your Student Guide. Then divide the H+ concentration by the OH– concentration. Record this calculated ratio in Table A of your Student Guide. Compare your approximated and calculated ratios of H+ ions to OH– ions at a pH = 6. Are they the same? Why or why not? Record your explanation in Table A. What is the concentration of H+ ions at a pH = 6? mol/L What is the concentration of OH– ions at a pH = 6? mol/L What is the ratio of H+ ions to OH– ions at a pH = 6?
Answer:
Answer:
You must know the concept of pH of a solution and its relation to the concentration of H+ and OH- ions. pH is a measure of the substance's acidity or basicity. From the definition of Arrhenius, an acid contains an H+ while a base contains a OH- ion. From this definition, we can say that an acidic substance has a higher concentration of H+ ions. Now, I'll introduce here that pH is the value of the negative logarithm of the concentration of H+. In equation,
pH = -log[H+]
The term pOH is therefore also, pOH = -log[OH-]. Therefore, the relationship that connects the two negative logarithms is:
pH + pOH = 14
The pH scale starts from 1 being the most acidic to 14 being the most basic. The neutral pH is 7. Thus, for a pH of 7, the H+ and the OH- concentrations are equal.
pH = 7 = -log[H+]
[H+] = 1×10⁻⁷ mol/L = [OH-]
Since the concentrations are equal, the ratio is equal to 1.
What are the characteristics of the three states of matter?
Solid:
Liquid:
Gas:
huryyyyyy plsssssssssssssssssss
Answer:
B.
Explanation:
bc it goes from having the potential to move to moving sorry if im wrong tho
Photo attached, please help me if you can :(
Answer:
I'm pretty sure the ionic structure is C, sorry this is only one answer tho : , (
Explanation:
Where are the metalloids located in the periodic table
Answer:
Blood
Explanation:
Which of the following is a standardized and convenient unit to use for comparing distances across the Solar System?
A
the distance from the Sun to Earth
B. the distance light travels in one year
C the distance Mercury travels in one year
D. the distance Earth travels around the Sun
If a nitrogen atom has 7 protons and 7 neutrons, what is its mass?
Need help fast plzzz!!! Please help.
Answer:
1. 0.5333333m (Calculator Soup Work Calculator)
2.
9. 29.1666666667% efficient
10. 44.5% efficient
Explanation:
will do other answers later
Write the number 0.0000087 in scientific notation.
Answer:
8.7 × 10-6
Explanation:
sorry if incorrect
Answer:
[tex]8.7 \times {10}^{ - 6} [/tex]
Explanation:
[tex]0.0000087[/tex]
[tex]8.7 \times {10}^{ - 6} [/tex]
Isotopes are atoms of the same element that have different O principal chemical properties, masses. O numbers of protons, O numbers of electrons.
Answer:
Different atomic mass, number of neutrons
Explanation:
Isotopes refer to atoms of the same element, with same atomic number, number of protons & electrons. However, they have different atomic mass, because of different number of neutrons.
What is a unwanted change in the environment caused by substances or from of energy??
Answer:
pollution I think
Explanation:
To slow down the flow of electrons in a circuit is called
Answer: Resistance slows down the flow of charge in a circuit. The unit of resistance is the ohm (Ω) which is defined as a volt per ampere of current.
Explanation: