Answers
Related Questions
What is the chemical name of the compound K2SO4? Use the list of polyatomic ions and the periodic table to help you answer.
A. Dipotassium sulfate
B. Potassium sulfate
C. Potassium (||) sulfate
D. Potassium sulfide
Answers
Answer:
B. Potassium Sulfate
Explanation:
SO4=sulfate
-2 charge cancels
Answer:
B. Potassium Sulfate
Explanation: for clever users /plato
If a 50kg car is pulling a 30kg car, how much force would be required to accelerate the cars at 2m/s/s?
Answers
Answer:
160N
Explanation:
F = m × a
Where;
F = force (Newton)
m = mass (kg)
a = acceleration (m/s²)
According to this question, a 50kg car is pulling a 30kg car. This means that the total mass of the cars is 50kg + 30kg = 80kg
Hence, the force required to accelerate the cars at 2m/s² can be calculated this:
F = 80 × 2
F = 160kgm/s²
F = 160N
1. Se preparan 750 ml de una disolución en agua, que contiene 0,00071 moles de Nitrato de potasio para adobar una carne de res. Calcular la ppm de la disolución. 2. Una muestra de 600 ml de disolución tiene 4 mg de ión fluoruro (F-). Cuántas ppm de F hay en la muestra?. Ayudaaaaaa plis
Answers
Answer:
1. 95.7 ppm
2. 6.67 ppm
Explanation:
Podemos pensar la denominación ppm como partes por millón, es un tipo de unidad que define concentración de solutos en una solución.
ppm = μg/g o si lo queremos ver en volumen, μg/mL
Quiere decir microgramos de soluto en 1 g de solución o mL de solución.
Ej 1. En primer lugar convertimos los moles de KNO₃ a gramos
0.00071 mol . 101.1 g/mol = 0.071781 g
Si pasamos los gramos a μg → 0.071781 g . 1000000 μg/ 1g = 71781 μg
Dividimos 71781 μg /750 ml = 95.7 ppm
Ej 2. Convertimos los mg a μg → 4 mg . 1000 μg/ 1 mg = 4000 μg
Ahora dividimos: 4000 μg /600 ml = 6.67 ppm
What is the correct electron configuration for Si (atomic number 14)?
O A. 1522322p6352208
O B. 1s22s22p63s13p3
O C. 1822s22p63s23p3
O D. 1522522p3s23p2
SUIDRAT
Answers
Answer:
1s22s22p63s23p3
do you need explanation?
How do electrons affect the state of an element?
Answers
Answer:
Explanation:
All matter is made up of atoms. ... These shells are actually different energy levels and within the energy levels, the electrons orbit the nucleus of the atom. The ground state of an electron, the energy level it normally occupies, is the state of lowest energy for that electron.
What caused space technology to improve so quickly?
Answers
Answer:
“spinoff”
Explanation:
Here is just a sampling of the many “spinoff” technologies, as NASA refers to them, resulting from space research and development that we now use in everyday life.
what happens when a covalent bond vs. an ionic bond is formed?
Answers
Explanation:
Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. ... A covalent bond involves a pair of electrons being shared between atoms. Atoms form covalent bonds in order to reach a more stable state.
What are 1a 3b and 7a explains on the periodic cable
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Answer:
Explanation:
1a=group 1 elements(H,Li,Na,K....)
3b=group 3 elements (Sc,Y,La....)
7a=group 17 elements (F,Cl,Br,I....)
Jase mixed 2 liquids together and to his amazement, he saw that a solid had formed! What is this solid known as?
(will give brainliest)
Answers
Answer:
......
Explanation:
Is 2AgNO3 + BaCI2 -> 2AgCl + Ba(NO3)2 Balanced or unbalanced. If unbalanced which element cause the unbalance
Answers
Answer:
This is balanced
Explanation:
Both sides contain 2 Ag 2 NO3 1 Ba and 2 Cl.
A local plant nursery uses large sprinklers to water the plants twice a day. The water contains phosphorus, which is a fertilizer that helps plants grow. Some of the water becomes runoff and ends up in nearby streams and lakes. This is an example of which type of short-term human-induced environmental change? eutrophication
Answers
Answer:
It’s eutrophication
Explanation:
There is no way it can be DEFORESTATION or NON SUSTAINABLE SPECIES
Non sustainable harvesting has something to do with animals and eutrophication means adding excessive nutrients
Answer:A.
Explanation: I took the test, sorry if this is incorrect
_____is the chemical bond formed when two atoms share electrons.
Answers
Answer:
covalent bond
Explanation:
Answer:
The covalent bond is the chemical bond formed when two atoms share electrons.
Which elements are abundant in visible universe
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Hydrogen is the most abundant element in the Universe; helium is second. However, after this, the rank of abundance does not continue to correspond to the atomic number; oxygen has abundance rank 3, but atomic number 8. All others are substantially less common.
HOPE THIS HELPED <3
Someone help with this ions and isotopes worksheet?
Answers
Isotopes are atoms of the same element that have different numbers of neutrons. Protons are positively-charged particles found in the nucleus of an atom.
Electrons are negatively-charged particles found in the outer shell of an atom. The charge on an element is determined by the number of protons and electrons present in the atom.
a.) Li+: number of protons = 3
Number of electrons = 2
charge of Li+ = +1
b.) Be2+: number of protons = 4
Number of electrons = 2
charge of Be2+ = 2+
c.) C4+: number of protons = 8
Number of electrons = 4
charge of C4+ = 4+
d.) O2-: number of protons = 8
Number of electrons = 10
charge of O2- = -2
e.) N3-: number of protons = 7
Number of electrons = 10
charge of N3- = -3
f.) C4- : number of protons = 4
Number of electrons = 4
charge of C4- = -4
g.) 14C6: The mass number = 14
Atomic number = 6
Number of neutrons = 8
h.) 18O8: The mass number = 18
Atomic number = 8
Number of neutrons = 10
i.) 19F9: The mass number = 19
Atomic number = 9
Number of neutrons = 10
j.) 40Ca20: The mass number =40
Atomic number = 20
Number of neutrons = 20
k.) 37Cl17: The mass number = 37
Atomic number = 17
Number of neutrons = 20
l.) 238U92: The mass number = 238
Atomic number = 92
Number of neutrons = 146
To learn more about isotopes click here https://brainly.com/question/21536220
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At extremely cold temperatures, processes stop. Which Law of Thermodynamics addresses this?
Answers
Answer:
The Second Law
Explanation:
Is radium usually considered as part of the alkaline earth category in terms of chemistry?
Answers
Explanation:
Radium (atomic number 88) has similar properties to barium and is also in the Group 2 category. However, radium is a radioactive element and is generally under the category of radioisotopes in addition to being an alkaline earth metal, because it is not a stable element.
PLEASE HELP! 30 POINTS + BRAINLIEST!
If the product of the reaction is analyzed and found to contain 0.130 g of nitrogen and 0.370 g of oxygen, which compound was made?
Answers
Answer:
bro
Explanation:
If the product of the reaction is analyzed and found to contain 0.130 g of nitrogen and 0.370 g of oxygen are N2O5
Can someone help mee ?
Answers
What is the formula for volume of a rectangular solid?
1.)length x width x height
2.) 1/2 length x width x height
3.)1/2 base x height
4.) length x width
Answers
Answer:
1. length x width x height
Answer:
1st.
thats the one for u to choose
What is the value for AG at 100 Kif AH = 27 kJ/mol and AS = 0.09 kJ/(mol-K)?
A. AG = 2700 kJ/mol
B. AG = -36 kJ/mol
C. AG = 0 kJ/mol
D. AG = 18 kJ/mol
Answers
Answer:
ΔG = 18KJ/mol
Explanation:
Given data:
ΔS = 0.09 Kj/mol.K
ΔH = 27 KJ/mol
Temperature = 100 K
ΔG = ?
Solution:
Formula:
ΔG = ΔH - TΔS
ΔS = entropy
ΔH = enthalpy
by putting values,
ΔG = 27 KJ/mol - 100K(0.09 Kj/mol.K)
ΔG = 27 KJ/mol - 9 KJ/mol
ΔG = 18KJ/mol
Answer:
ΔG = 18kJ/mol
Explanation:
took the quiz on ap ex and it was correct
Which example shows how genetic engineering can be used in the agricultural industry?
A.
Two tomato plants that produce sweet tomatoes are crossed to produce offspring that also produce sweet tomatoes.
B.
A horse is bred with a donkey to produce a hybrid offspring that has characteristics of both parents.
C.
A gene for pest resistance is inserted into the genome of a corn plant.
D.
A sheep is cloned to produce an exact copy of the original sheep.
Answers
Answer:
c. a gene for pest resistance is inserted into the genome of a corn plant
Explanation:
Answer: A duh
Explanation:
becastse
What does the 16 mean in the isotopes carbon 16
Answers
Answer:
Carbon 16
Explanation:
Isotope of nitrogen
the filament in an electric light bulb is made from a. platinum b. fiberglass c. aluminum d. tungsten
Answers
most abundant noble gas in the air
Answers
Answer:
Argon
Explanation:
I'm pretty sure it's argon.
The more variation in a species, the less likely the chance that species has of surviving. true or false
Answers
Answer:
The more variation in a species, the less likely the chance that species has of surviving. false
Explanation:
As species have heritable variation the species produce more offsprings that can survive and offsprings within a favorable variation are more likely to survive and reproduce. Hence favorable variation makes the species diverse and more in population. Thus greater are the chances of survival, a decrease in diversity will lead to a decline in variability, and fewer chances of survival.What is the percentage of water in the following compound? Answer using three significant figures.
Sodium carbonate decahydrate, Na2CO3 • 10H2O
% by mass H2O
Answers
Answer:
63.0
Explanation:
on edge
What is the mass shown?
(Sorry u cant really see!)
Answers
What is true of electrons?
1. They are negatively charged and located inside the nucleus
2.They are positively changed and located inside the nucleus
3. They are negatively charged and located outside the nucleus
4. They positively changed and located outside the nucleus
Answers
Answer:
electrons are negatively charged and are located in the electron cloud (outside the nucleus)
Answer:
The answer is option 3.
Explanation:
Electrons are negatively charged and is located outside the nuclues.
Protons are positively charged, neutrons are neutral and both are located inside the nucleus.
Where does the chemical energy of food start?
Answers
Answer:
Chemical energy in foodChemical energy in foodAs the bonds between the atoms in food loosen or break, a chemical reaction takes place, and new compounds are created. The energy produced from this reaction keeps us warm, helps us move, and allows us to grow. Different foods store different amounts of energyExplanation:
plz mark as brainilist
Answer:
BELOW !!
Explanation:
Chemical energy in food
As the bonds between the atoms in food loosen or break, a chemical reaction takes place, and new compounds are created. The energy produced from this reaction keeps us warm, helps us move, and allows us to grow. Different foods store different amounts of energy.
Water is produced from the reaction of hydrogen and oxygen gas, according to the equation below. What is the excess reactant in the reaction of 4.2 moles of hydrogen with 3.0 moles of oxygen?
2H2(g) + O2(g) = 2H2O(L)
Select one:
a. Water
b. Oxygen
c. No excess reactant
d. Hydrogen
Answers
Explanation:
Mole ratio of Oxygen to Hydrogen gas = 1 : 2.
If we use 3.0 moles of oxygen gas, we would need 3.0 * 2 = 6.0 mol of hydrogen gas.
However we only have 4.2 mol of hydrogen. Therefore hydrogen is limiting and oxygen is in excess. (B)