Answer:
D=m/v
D=57.8/112.4
D=0.51423487544 g/mL^2
Explanation:
The density of an object with a mass of 57.8 g and volume of 112.4 mL is 514.23 mg/m L.
What do you mean by density?Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume.
Density is commonly expressed in units of grams per cubic centimeter.
Density can also be expressed as kilograms per cubic metre .
To calculate the density of an object ,
Given,
Mass=57.8 g(57.8×1000=57800mG) convert grams into milligrams
Volume=112.4mL
We know ,
Density =mass/volume
=514.23mG/mL
The density of an object with a mass of 57.8g and volume of 112.4 mL is 514.23 mg/m L.
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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
A positively charged atom has _____.
gained protons
gained electrons
lost electrons
lost protons
Answer:
lots electrons
Explanation:
im pretty sure its right as well
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!
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.
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
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.
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.
Day 2 question 2 is the one i’m having trouble with please help!
Answer:
Fish tank
Explanation:
It is the largest and therefore has the most volume.
. A golfer hits a golf ball with a club. The mass of the ball is 0.05 kg. The ball accelerates at 2,000 m/s2. What is the net force, to the nearest newton, that accelerates the ball? (please only type in the numerical response, no unit of measurement) Use the formula F= MA
Answer:
The answer is
100 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
Force = mass × accelerationFrom the question
mass = 0.05 kg
acceleration = 2000 m/s²
The force acting on the object is
Force = 0.05 × 2000
We have the final answer as
100 NHope this helps you
Answer:
100N
Explanation:
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.
how many atoms are in Cl₂O₃?
Answer:
There are 2 atoms in Chlorine(Cl)
and 3 atoms in Oxygen(O)
Explanation:
will mark brainliest for explanation What is formed when a solid dissolves in a liquid?
Soluble
Insoluble
Solvent
Solute
Solution
Answer:
A solute is the substance that dissolves to make a solution. In salt solution, salt is the solute. A solvent is the substance that does the dissolving – it dissolves the solute. In salt solution, water is the solvent.
During dissolving, particles of solvent collide with particles of solute. They surround the particles of solute, gradually moving them away until the particles are evenly spread through the solvent.
For each solute and solvent, there is a limit to the mass of solute that will dissolve in a particular volume of the solvent. When no more solute will dissolve, we say that the solution is a saturated solution.
Explanation:
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 :)
differentiate between metals and non metal
Metals are considered to be electropositive in nature due to their ability to donate electrons. Whereas non-metals are electronegative as they generally accept electrons. ... Metals shows the property of malleability while non-metals are non-malleable.
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)
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.
I need help with the electron configurations shown in the picture
Answer:
1s2 2s2 2p6 3s1
Explanation:
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.
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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:
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
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
Calculate the atomic mass of oxygen if the three common isotopes of oxygen have masses of 15.995 amu (99.759% abundance), 16.995 amu (0.037 % abundance), and 17.999 amu (0.204 % abundance). (please show work) I will give brainliest answer !
Answer:
15.999 amu
Explanation:
From the question given above, the following data were:
Isotope A:
Mass of A 15.995 amu
Abundance (A%) = 99.759%
Isotope B:
Mass of B = 16.995 amu
Abundance (B%) = 0.037%
Isotope C:
Mass of C = 17.999 amu
Abundance (C%) = 0.204%
Atomic mass of Oxygen =.?
The atomic mass of oxygen can be calculated by using the following formula:
Atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]
Atomic mass = [(15.995 × 99.759)/100] + [(16.995 × 0.037)/100] + [(17.999 × 0.204)/100]
Atomic mass = 15.956 + 0.006 + 0.037
Atomic mass = 15.999 amu
Therefore, the atomic mass of oxygen is 15.999 amu
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.
If the average velocity of an object is not the same for all time intervals, then the object moves at a(n)
Answer:
A
Explanation:
because the object's velocity had no acceleration between time intervals
According to the Punnett square: B represents the dominant gene for blue feathers and b represents the recessive gene for red feathers. Two heterozygous birds have one offspring. What percent chance does it have for red feathers?
A) 0%
B) 25%
C) 75%
D) 100%
Answer: 25%
Explanation: bb are don't have a dominant trait to overmask it
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
Write a brief passage describing a neutral atom of
nitrogen-14 (N-14). Describe the number of
protons, neutrons, and electrons in the atom,
where each type of particle is located, and how
the terms atomic number, mass number, and
atomic mass are related to the particles. Use the
periodic table to help you
Answer:
Detail is given below.
Explanation:
Electron:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e-
Mass= 9.10938356×10-31 Kg
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
Neutron and proton:
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Symbol of proton= P+
Symbol of neutron= n0
Mass of proton=1.672623×10-27 Kg
Mass of neutron=1.674929×10-27 Kg
Location of electron, proton and neutron.
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom of nitrogen have 7 protons than it must have 7 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
For example
Mass of nitrogen = number of neutron + number of proton
Mass of nitrogen = 7 + 7 = 14
Atomic number of nitrogen = number of electron or number of proton
Atomic number of nitrogen = 7
Answer:
There are 7 protons, 7 neutrons and 7 electrons in Nitrogen-14. Protons and neutrons are located in the nucleus, while electrons are located in electron shells. The number of protons determines the element's atomic number, the number of protons AND neutrons combined determine the element's mass number, and the average of the masses of all isotopes determines an element's atomic mass.
Explanation:
Hope this helps! :D
which of the following compounds would be expected to be hard and brittle and to have a high melting point
what is agriculture
Answer:
the science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.
the science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.
Convert -8.0 degrees F to
degrees C.
[?]°C
Answer:
7.22 Celcius
Explanation:
You got this.
