Answer:
what's the question here then ?????
Explanation:
nepal ????
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)
Answer:
......
Explanation:
Can someone help mee ?
Someone help with this ions and isotopes worksheet?
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
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name 3 collinear points
Answer:
These three points all lie on the same line. This line could be called 'Line AB', 'Line BA', 'Line AC', 'Line CA', 'Line BC', or 'LineCB' .
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
Answer:
1. length x width x height
Answer:
1st.
thats the one for u to choose
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?
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
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
Answer:
B. Potassium Sulfate
Explanation:
SO4=sulfate
-2 charge cancels
Answer:
B. Potassium Sulfate
Explanation: for clever users /plato
What does the 16 mean in the isotopes carbon 16
Answer:
Carbon 16
Explanation:
Isotope of nitrogen
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
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
When calculating the amount of product formed during alcohol fermentation, one mole of ethanol is chemically equivalent to what volume of CO2 (g) measured at 1 atm and 273 K
Answer:
44.8 dm^3
Explanation:
The equation for the fermentation of glucose is;
C6H12O6 -----> 2C2H5OH + 2CO2
This means that two moles of ethanol carbon dioxide are produced.
If 1 mole of gas at STP occupies 22.4 dm^3, then two moles occupies; 22.4 dm^3 × 3 = 44.8 dm^3
the filament in an electric light bulb is made from a. platinum b. fiberglass c. aluminum d. tungsten
What caused space technology to improve so quickly?
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.
SOMEONE HELP ME PLEASE I’LL GIVE BRAINLY
Chemical change
physical change
Answer:
Chemical
Explanation:
If a 50kg car is pulling a 30kg car, how much force would be required to accelerate the cars at 2m/s/s?
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
Which of the following statements are true of indirect disease-causing factors? Check all that apply.
Indirect causes of disease include genetics, lifestyle, and environmental factors.
Indirect causes of disease are always passed down from parents.
Indirect causes of disease can trigger genes, leading to types of cancer.
Indirect causes of disease include infections and pathogens
Answer:indirect causes of disease include genetics, lifestyle, and environmental factors
Explanation:
The indirect disease -causing factors include some genetic factors, infections from other persons etc. Thus options A ,C and D are correct.
What are indirect disease -causing factors?There are some factors such as infection from other people make us infected also not by directly originating in ourselves. For example, passive smokers may have respiratory disorders.
Some disease can be generated indirectly from the gene types inherited from parents. These may cause imperfect gene coding and some times trigger cancer.
Infections such as flu, cold, different types of fevers, viral and bacterial infection are able to spread and might affect other two-three people.
Therefore, indirect disease -causing factors includes genetic disorders inherited from parents and infections from environment and hence options A, C and D are correct options.
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How do electrons affect the state of an element?
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 is the percentage of water in the following compound? Answer using three significant figures.
Sodium carbonate decahydrate, Na2CO3 • 10H2O
% by mass H2O
Answer:
63.0
Explanation:
on edge
What are 1a 3b and 7a explains on the periodic cable
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....)
What is the mass shown?
(Sorry u cant really see!)
Which elements are abundant in visible universe
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.
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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.
Answer:
c. a gene for pest resistance is inserted into the genome of a corn plant
Explanation:
Answer: A duh
Explanation:
becastse
most abundant noble gas in the air
Answer:
Argon
Explanation:
I'm pretty sure it's argon.
what is the molar mass of nickel (ll) chloride(NiCl2)
Answer:
Explanation:
yt
Answer:
129.5994 g/mol
Explanation:
At extremely cold temperatures, processes stop. Which Law of Thermodynamics addresses this?
Answer:
The Second Law
Explanation:
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
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 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
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.
Which of the following is an example of a chemical reaction?
Answer:
where is the option I can't see plz give the option first the I try to give answer
What is the correct electron configuration for Si (atomic number 14)?
O A. 1522322p6352208
O B. 1s22s22p63s13p3
O C. 1822s22p63s23p3
O D. 1522522p3s23p2
SUIDRAT
Answer:
1s22s22p63s23p3
do you need explanation?
Where does the chemical energy of food start?
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.
Is radium usually considered as part of the alkaline earth category in terms of chemistry?
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.