Answer:
69Ga=68.925580(3),71Ga=70.9247005(3)
Tungsten (W), Copper (Cu), and Iron (Fe) all belong to the same family, whose members are generally used as conductors of electricity. What family is this?
Answer:
Transition metals.
Explanation:
Conductor of electricity typically refers to any material or object that allow the conduction (transfer) of electric charge.
Tungsten (W), Copper (Cu), and Iron (Fe) all belong to the same family, whose members are generally used as conductors of electricity. This family is known as transition elements.
The transition elements refers to the chemical elements found in group III to XII (3-12) of the periodic table and typically has a d-orbitals (d subshell) that is partially filled with electrons.
Tungsten (W), Copper (Cu), and Iron (Fe) belongs to the family of transition metals.
Conductors of electricity are object or substance that conduct electricity. Currents can flow through them efficiently.
The Elements Tungsten (W), Copper (Cu), and Iron (Fe) all belong to the group/family called transition metals.
Transition metals forms one or more stable ions and they have incompletely filled d orbitals.
Generally, transition metals are good conductor of electricity. They are very good catalyst for chemical reaction.
read more: https://brainly.com/question/25514704?referrer=searchResults
how many atoms does SO₃ have?
This formula has three types of atoms - nitrogen (N), hydrogen (H) and oxygen (O). There are a total of 4 atoms in one molecule of SO3.
Select the correct answer.
What is the SI unit of time?
OA.
second
OB.
minute
OC. hour
OD
day
Reset
Next
Answer:
A. Second
Explanation:
The S.I unit of time is in Seconds.
The S. I unit is known as the metric system is the most commonly used system of reporting scientific measurements in the world today. Other units are the imperial units.
It is the international system of unit used in almost all countries. The seven basic SI units are:
Quantities Units
Length meters(m) Time seconds(s)Amount of substance moles(mol)Mass kilograms(kg)Luminous intensity candela(cd)Temperature kelvin(K)Electric current ampere(A)The SI unit of time which measures the duration of an activity or event is therefore given as seconds(s)
3. When two atoms bond together to form a molecule, which parts of the atoms
become part of the bond?
Answer:
Atoms come together to form molecules because of their electrons. Electrons can join (or bond) atoms together in two main ways. When two atoms share electrons between them, they are locked together (bonded) by that sharing. These are called covalent bonds
Question 55 pm
View the model and answer the question below.
In 1-2 complete sentences, identify the black lines and explain what they represent.
Answer:
They are magnetic lines and theses lines depict the invisible magnetic field around the magnet! Hope this helps I got it right on my quiz:)
Explanation:
Answer:
theses lines depict the invisible magnetic field around the magnet!
What is the mass of 2.49 cm of aluminum? The density of aluminum is 2.70 g/cm.
Answer:
6.723
Explanation:
2.49*2.70
Which verb describes a process that is NOT indicative of a chemical change?
a) ferment
b) burn
c) rot
d) melt
Answer:
melt
Explanation:
i got it right on CK-12
A substance's color changing is not always an indication of a chemical change. Changing the color of a metal, for example, has no effect on its physical properties. Melt is not indicative of a chemical change.
What is melting point ?The typical definition of the melting point is the temperature at which a substance changes from a solid to a liquid.
The melting point of a liquid is the temperature at which the liquid converts from a solid to a liquid above atmospheric pressure. At this period, both the liquid and solid phases are in a thermodynamic equilibrium.
The melting point is frequently used to forecast a chemical's behavior when it changes between the solid and gas phases. Higher intermolecular forces and hence lower evaporation rate are indicators of higher melting values.
Thus, option D is correct.
To learn more about melting point follow the link below;
https://brainly.com/question/25777663
#SPJ2
Students were supposed to recover 80% of the product from a chemical reaction. Given the laboratory procedures, the students should have collected 50.2 g of product. Chemistry students performed three trials of the experiment and recorded their data in the table below. Which student has recorded both accurate and precise measurements?
Answer:
Olivia ?? depends
Explanation:
I have the same question but if yours is different from mine than that's not the answer. Janema Olivia Michael
Trial #1 46.1 g 50.1 g 53.1 g
Trial #2 47.8 g 50.2 g 53.0 g
Trial #3 53.1 g 50.2 g 53.2 g This is what my chart looks like and you can see Olivia's is the most consistent :)
What is an example of a solid turning into another state of matter?
Answer:
Explanation:
Let me start with a simple one:
An ice cube ( solid ) changing into water ( a liquid )
Another example:
Dry ice ( solid ) submiling.
HOPE IT HELPES
Which statement explains the kinetic theory of heat? Objects whose particles are at the same temperature are in thermal equilibrium. Objects are made of tiny particles, and their motion depends on the temperature. An object's thermal energy is caused by the movement of the tiny particles that it is made of. Heat is transferred as thermal energy by the interaction of moving particles.
Answer:
Which statement explains the kinetic theory of heat?
A)Objects whose particles are at the same temperature are in thermal equilibrium.
B) Objects are made of tiny particles, and their motion depends on the temperature.
C) Heat is transferred as thermal energy by the interaction of moving particles.
D) An object's thermal energy is caused by the movement of the tiny particles that it is made of.
YOU ANSWER IS (C) "heat is transferred as thermal energy by the interaction of moving particles"
Explanation: I TOOK THE K12 TEST ENJOY !!!!
Answer:
Heat is transferred as thermal energy by the interaction of moving particles.
Explanation:
I took the test
2. Randy has a 500 g of water at 20°C. If he wants the final temperature of the water to be 75°C (the change in temperature will be 55°C), how many Joules of heat will he need to add? (Cwater = 4.184 J/(g°C)
Answer:
115060 J
Explanation:
From the question given above, the following data were obtained:
Mass (M) = 500 g
Initial temperature (T1) = 20 °C
Final temperature (T2) = 75 °C
Change in temperature (ΔT) = 55 °C
Specific heat capacity (C) = 4.184 J/g°C
Heat (Q) required =?
The heat required to change the temperature of the water can obtained as follow:
Q = MCΔT
Q = 500 × 4.184 × 55
Q = 115060 J
Therefore, the heat needed to change the temperature of the water is 115060 J.
7. How many kilograms are equal to 3.3 scruples?
Answer:
The answer would be 0.004276728059999999 kilograms. Rounded it would be 0.004 kilograms
Explanation:
0.0043 kilograms are equal to 3.3 scruples.
What are measuring quantities?Measuring quantities are those quantities that are used to measure some quantities of substances. Like volume, mass, length, etc. Kilograms and grams are the measuring quantity used to measure the mass of an object.
A unit is basically just a specific amount of a quantity that is used as a benchmark when measuring that quantity.
Units of measurement were frequently decided upon a long time ago. It is one meter long since it is the foundation unit of length that scientists have agreed to use. There were various possible lengths for a meter.
1 scruple = 20 grains
1 grain = 64.79891 milligrams = 0.065 g = 0.000065 kg
3.3 scruples is equal to: 3.3 x 20 x 0.000065 = 0.0043 kg.
Thus, 3.3 scruples = 0.0043 kg.
To learn more about measuring quantities, refer to the below link:
https://brainly.com/question/12090502
#SPJ2
which of the following compounds would be expected to be hard and brittle and to have a high melting point
Why does Earth get more energy from the sun than from all the other stars in the universe combined?
A.) The sun is much hotter than the other stars.
B.) The sun is much more dense than the other stars,
C.) The sun is much closer than the other stars.
D.) The sun is much larger than the other stars,
Answer:
C
Explanation:
C is correct because it is extremely close compared to other stars, the closest at 23 light-years(the distance from the Earth to the sun) away.
The earth gets more energy from the sun than from all the other stars in the universe combined because the sun is much closer than the other stars.
The universe is composed of several stars. These stars are at various distances from the earth.
The earth is closest to the sun. The distance between the earth and the sun is about 93,000,000 miles or 150,000,000 km.
Owing to the proximity of the sun and the earth, the earth get more energy from the sun than from all the other stars in the universe combined.
Learn more: https://brainly.com/question/11948445
26. Which method is correct for determining the number of gallons required to fill an automobile's
64 liter tank?
1.000 liter
a. 64 liters
4 quarts
1.000 liter 1 gallon
b. 64 liters
1 gallon
1.057 quarts
4 quarts
1.057 quarts
c. 64 liters
4 quarts
1.057 quarts 1 gallon
d. 64 liters
1.000 liter 1 gallon
1.000 liter
4 quarts
1.057 quarts
Answer:
b is correct method.
Explanation:
Given that,
Volume of tank = 64 liter
We need to find the conversion liter to quarts
Using conversion
[tex]1\ L=\dfrac{1\ l}{1.057\ quarts}[/tex]
We need to find the conversion quarts to gallons
Using conversion
[tex]1\ quarts=\dfrac{1\ l}{4\ gallons}[/tex]
We need to find correct method
Using conversion
[tex]64\ L=\dfrac{1\ L}{1.057}\times\dfrac{1\ gallon}{4\ quarts}[/tex]
Hence, b is correct method.
A student filled a graduated cylinder with water and read the meniscus at 36.1 mL. The student then
dropped a metal cylinder into the graduated cylinder and the water level rose to 43.7 mL. If the metal
cylinder had a density of 2.70 g/
mL, determine the mass of the solid object. Show work.
Answer:
The mass of solid object is 20.52 g.
Explanation:
Given data:
Volume of water = 36.1mL
Volume of water with metal cylinder = 43.7 mL
density of metal cylinder = 2.70 g/mL
Mass of solid object = ?
Solution:
First of all we will calculate the volume of solid object.
Volume of solid object = Volume of water with metal cylinder - Volume of water
Volume of solid object = 43.7 mL - 36.1mL
Volume of solid object =7.6 mL
Density:
density = mass/ volume
2.70 g/mL = mass / 7.6 mL
mass = 2.70 g/mL × 7.6 mL
mass = 20.52 g
The mass of solid object is 20.52 g.
4. The periodic table is organized into groups and periods of elements. The point
characteristics of a certain group of elements are listed below. Which of
these elements is in this group?*
Characteristics of a Group of Elements
• Is shiny
• Is solid at room temperature
• Has atoms with two valence electrons
O A Lithium
O B. Strontium
O C. Aluminum
O D. Silicon
Answer:B
Explanation:
Which statement correctly describes the nucleus of the atom?
A) The nucleus of the atom contains the electrons.
B) The nucleus of the atom is mostly empty space.
C) The nucleus of the atom surrounds the center of the atom.
D) The nucleus of the atom contains most of the mass of an atom.
Answer:
llllllllllkkkll
(Answer:D)
How many 15W LED bulbs could Niagara Falls power?
Complete question is;
Water flows over Niagara Falls at the average rate of 2,400,000 kg/s, and the average height of the falls is about 50 m. Knowing that the gravitational potential energy of falling water per second = mass (kg) x height (m) x gravity (9.8 m/s²), what is the power of Niagara Falls? How many 15 W LED light bulbs could it power?
Answer:
A) Power of Niagara Falls = 1.176 × 10⁹ W
B) 78.4 × 10⁶ bulbs
Explanation:
A) We are given;
The mass flow rate of Niagara falls = 2,400,000 kg/s
The average height of the fall = 50 meters
Gravitational potential energy = mass (kg) x height (m) x gravity (9.8 m/s²)
Now, formula for power is; workdone/time taken.
Thus it's potential energy/time taken.
Hence;
Power = (mass (kg) x height (m) x gravity (9.8 m/s²))/time(s)
We know that mass/time is mass flow rate.
Thus; power = mass flow rate (kg/s) × height (m) × gravity (9.8 m/s²)
Thus;
Power of Niagara Falls = 2400000 × 50 × 9.8 m/s²
Power of Niagara Falls = 1.176 × 10⁹ W
B) The number(n) of 15 W LED light bulbs Niagara falls could power is given by the relationship;
n × 15 W = 1.176 × 10⁹ W
Thus;
n = 1.176 × 10⁹ W/(15 W)
n = 78.4 × 10⁶ light bulbs
The number of 15 W LED light bulbs Niagara falls could power = 78.4 × 10⁶ bulbs
1. Is the equation above balanced or unbalanced? Zn + 2HCl ---> ZnCl2 + H2
Answer:it is balanced
Explanation:
u can see that there is 1 ZN on both side, 2H on both side, 2Cl on both side, so it is balanced
Answer:
Balanced
Explanation:
RxN
Zn + 2HCl → ZnCl₂ + H₂
We have 1 Zn on both sides of the reaction. Check
We have 2 H's on both sides of the reaction. Check
We have 2 Cl's on both sides of the reaction. Check
Therefore, our RxN is balanced.
Forensic means _______ the forum
Which of the following properties are found in ionic compounds?Immersive Reader
A- Formation of molecules
B- Low melting point
C- Doesn't dissolve in water
D-High melting point
Answer:
High melting point is answer
Classify each of these as a heterogeneous or homogeneous mixture
Answer:
blood- homogeneous
ocean water - heterogeneous
air- homogeneous
blueberry pancakes - homogeneous
milk - homogeneous
steel - homogeneous
Phosphorus atomic radius is smaller than magnesium atomic radius
True or false
Answer:
True
Explanation:
Atomic radius can be defined as a measure of the size (distance) of the atom of a chemical element such as hydrogen, oxygen, carbon, nitrogen etc, typically from the nucleus to the valence electrons. The atomic radius of a chemical element decreases across the periodic table, typically from alkali metals (group one elements such as hydrogen, lithium and sodium) to noble gases (group eight elements such as argon, helium and neon). Also, the atomic radius of a chemical element increases down each group of the periodic table, typically from top to bottom (column).
Hence, the atomic radius of phosphorus is smaller than the atomic radius of magnesium. Basically, the atomic radius of phosphorus is 98 pm while the atomic radius of magnesium is 145 pm.
The mass of an atom is determined by the number of protons the element has. The more protons, the heavier the element.
True or False
Answer:
a i think true.
Explanation:
A positively charged atom has _____.
gained protons
gained electrons
lost electrons
lost protons
Answer:
lots electrons
Explanation:
im pretty sure its right as well
what are four states, or phrases of matter? describe the shape and volume properties of each phase, can they change or are they fixed?
Answer:
solid liquid gas and plasma
A person is 1.84 m tall. What is their height in inches , if 1 m = 1.0936 yd and 1 yd = 3 ft?
Answer:
72.440064 in
Explanation:
Convert meters to yards.
(1.84 m) × (1.0936 yd/m) = 2.012224 yd
Convert yards to feet.
(2.012224 yd) × (3 ft/yd) = 6.036672 ft
Convert feet to inches.
(6.036672 ft) × (12 in/ft) = 72.440064 in
might be hard to read but i do not understand what the “K” means.
it means kinetic energy
Answer:
k means. crores
Explanation:
it. is. very easy
4. How does finding density of an object help you identify the material that each block is made of?
Answer:
You can identify an unknown substance by measuring its density and comparing your result to a list of known densities. Density = mass/volume. . You divide the mass by the volume and compare the density to a list of known densities.
