A car drives with constant speed of 112km/h. How long will it take to travel to distance of 56 kilometers?

Answers

Answer 1

112 km is travelled by car in 60 minutes

1 km is travelled by car in 60/112 minutes

56 km is travelled by car in 60/112*56 = 30 minutes  = 0.5 hours

Explanation:


Related Questions

How many kinds of atoms are there

Answers

Answer:

there are more than 109 different types of atom - one for each element.

What’s the first thing you should always do before starting a lab

Answers

Review your instructions

What's the largest planet on Earth?

Answers

Answer:

Asia

Explanation:

Answer:

Asia.

Explanation:


The compound M-O-H can act both as acid or base depending upon the ionisation
enthalpy of the element M. Justify by taking elements (M) of the third period of the
periodic table.
action​

Answers

Answer:

Explanation:

A compound that can act both as an acid and a base is called an amphoteric substance. A good example (based on the question) of an amphoteric substance is the Aluminium hydroxide [Al(OH)₃] where Aluminium is the "M" in M-O-H. Aluminium is in the third period of the periodic table. The reaction below shows aluminium can act both as an acid and as a base in different neutralization reactions.

As an acid

Al(OH)₃ + 3NaOH ⇒ Na₃AlO₃ + 3H₂O

As a base

3HCl + Al(OH)₃ ⇒ AlCl₃ + 3H₂O

NOTE: A neutralization reaction is a reaction between an acid and a base to give you salt and water

Which form of heat transfer is the sun heating Earth's atmosphere? *

Answers

Answer:

Radiation

Explanation:

Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is invisible.

Which acid
is synthetic and not found in
nature?​

Answers

Answer:

because acids come from various chemical substances

Which process is an example of a chemical change? drying clothes in the dryer heating a cup of tea chopping a tree activating a glow stick

Answers

Answer:

Activating a glow stick is the example of a chemical change, as snapping one will cause a chemical reaction, causing the glow. All of the other options are physical changes because nothing new is formed. Hope this helps!

Summarize the process a scientist goes through to come up with a
satisfactory solution.

Answers

guess and check, test, trial and error, completion.

How can the motion of an object that is NOT moving change?

Answers

Answer:

Inertia.

Explanation:

The resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.

We have that for the Question "How can the motion of an object that is NOT moving change?" it can be said that Force is the reason for motion and is how can the motion of an object that is NOT moving change

Force

From the question we are told

How can the motion of an object that is NOT moving change?

Generally

Motion defines as the movement of a body from one place to another

Therefore

What the question is asking is

What makes the movement occur

Force

Force is defines as Mass of of an object times its acceleration but aslo is

the work done in a given time frame

Therefore

Force is the reason for motion and is how can the motion of an object that is NOT moving change

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What is the percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution?
Please help​

Answers

Answer:

The percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution is 4.61 %

Explanation:

The mass percentage of a solution is a measure of concentration that indicates the number of grams of solute that there are per 100 grams of solution.

The percent by mass is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100 to give a percentage.

[tex]percentage by mass=\frac{solute mass}{solution mass} *100[/tex]

In this case:

solute mass: 30 gsolution mass: 650 g

Replacing in the definition of percent by mass:

[tex]percentage by mass=\frac{30 g}{650 g} *100[/tex]

Solving:

percent by mass= 4.61 %

The percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution is 4.61 %


To calculate the charge of an atom you must

Answers

Answer:

The charge of an element is equal to the number of protons minus the number of electrons. The number of protons is equal to the atomic number of the element given in the periodic table. The number of electrons is equal to the atomic number minus the charge of the atom.

Explanation:

Zinc reacts with hydrochloric acid according to the reaction equation Zn(s)+2HCl(aq)⟶ZnCl2(aq)+H2(g) How many milliliters of 6.50 M HCl(aq) are required to react with 8.75 g Zn(s)?

Answers

Answer:

41.17

Explanation:

n Zn =  mass / m.wt

      = 8.75 /(65.4) = 0.1338 mole

n HCL = ( from the balanced equation )

     2HCL                  Zn

          2mole   → 1  mole

          x  mole     →             0.1338mole

     n HCL = .268 mole

M= mole/liter

6.50= 0.268/x

so u have0.04117  liter = 41.17 ml

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 41.17 ml of 6.50 M HCl(aq) are required to react with 8.75 g Zn(s).

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

number of moles of zinc=  mass / molecular mass

                                       = 8.75 /(65.4) = 0.1338 mole

number of moles of HCl ( from the balanced equation )

2 moles of HCl reacts with one mole of Zn

number of moles of HCl = 2×0.1338 =0.268 mole

Molarity = number of mole of HCl/volume occupied by solution

6.50= 0.268/volume

Volume of HCl = 41.17 ml

Therefore, 41.17 ml of 6.50 M HCl(aq) are required to react with 8.75 g Zn(s).

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which compound forms 2 parts of hydrogen and 1 part of oxygen?

Answers

Answer:

water

for one molecule of water each atom has the atomic mass unit, u,shown.

Explanation:

*can i be the brainliest*

Is beans in water a suspension colloid or solution

Answers

Answer:

The CORRECT answer is Solution

Explanation:

Since a Colloid is a liquid like substance that cannot be removed from other solids the only possible choice would be a Solution. becuase with a solution you can drain the solution and still get the beans.

Convert 30°C into kelvin

Answers

Answer:303.15

Explanation:

plastics
shells
aluminum
cans
drift
wood
sea
weed
glass
This chart illustrates the type and number of items collected during a clean up of a
beach. Based on the chart, what approximate percentage of the total items result
from the action of people?

Answers

It will be weed because wood is sum else


A car travels 350 km in 7 hours. What is the average speed of the car (in km/hr)?

Answers

Answer:

50 km/hr

Explanation:

just divide the distance by the time (350/7)

Answer:

50 km/hr

Explanation:

Distance = 350 km

Time = 7 hours

Average Speed = ?

[tex]Average\:Speed = \frac{Distance}{Time} \\\\Average\: speed = \frac{350\:km}{7\:hr} \\\\A.V = 50\:km/hr[/tex]

1. Which number is more accurate if the correct number is 3.5. Is it 3.1, 3.3, 3.6, or 4.0?

Answers

Seems to be 3.6 since it’s closer by 1, As for 4.0 it would be 5 more.

Answer:

3.6

Explanation:

3.6 is only 0.1 away from 3.5

I hope this helped and plz give brainliest!

Calculate the mass of water if the densityis 1.02 g/mL and the volume is 62 ml. M = (D(V)
.016 mL
60.78 mL
63.24 mL
73.24 mL

Answers

Answer:

The answer is

63.24 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

volume = 62 mL

density = 1.02 g/mL

The mass is

mass = 1.02 × 62

We have the final answer as

63.24 g

Hope this helps you

6. An alloy of iron contains 75.0% iron and 25.0% other elements. How many grams of iron are present in 150. g of the alloy?

Answers

Answer:

108.5

Explanation:

half of 150 is 75 and half of that is 32.5. Add that to 75 and you'll get your answer

112.5 g of iron is present in the alloy.

From the question given above, the following data were obtained:

Percentage of iron (Fe) = 75%

Percentage of other elements = 25%

Mass of the alloy = 150 g

Mass of iron (Fe) =?

The mass of the iron present in the alloy can be obtained as follow:

[tex]Percentage = \frac{mass of element }{total mass }\\\\[/tex]

75% = [tex]\frac{mass of Fe}{150}[/tex]

[tex]0.75 = \frac{mass of Fe}{150}\\\\[/tex]

Cross multiply

Mass of Fe = 0.75 × 150

Mass of Fe = 112.5 g

Therefore, 112.5 g of iron is present in the alloy.

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How does the control group differ from the experimental group? Choose all the correct options.
A The control group contains more than one experimental variable
B
The control group is used as a standard to compare results to, but the experimental group is not
c The experimental group is used as a standard to compare results to, but the control group is not
D The control group is not tested or measured
E The control group does not contain the experimental variable, but the experimental group does.
F The control group does contain the experimental variable, but the experimental group does not

Answers

Answer:

B,D,E

Explanation:

The answer is B,D,E those are the correct options.

What is the SI unit for mass

Answers

Answer:

kilo gram

Explanation:

kilogram(kg)

Answer:

Kilogram (Kg).......

What should be the very last function performed in the lab before you leave?
a) Bid the instructor farewell
b) Make sure that your locker is secure
c) Wash your hands
d) Arrange a time with your lab partner for lunch

Answers

Answer:

c) Wash your hands

Explanation:

A laboratory or most popularly called as lab is a place or facility which provides controlled conditions where some educational research, scientific studies, experiments, testings, can be performed. The place is equipped with sophisticated machines, test samples, hazardous chemicals, instruments  etc.

The university or college lab, there is a incharge of the lab called as the lab instructor who is responsible for all the belongings of the lab and the safety of the experimenter or the students.

After performing some experiments or testing with some chemicals, the last and the most important thing we need to do is to wash our hand with soap or hand wash. it is very important because we touch many test samples and hazardous chemical which might go inside our mouth or eyes accidentally, which might be harmful to us.

So, it is important to wash our hand at last before leaving the lab.

why can't a beaker be used to measuring the volume of a liquid

Answers

Graduated cylinders are designed for accurate measurements of liquids with a much smaller error than beakers. They are thinner than a beaker, have many more graduation marks, and are designed to be within 0.5-1% error. ... Therefore, this more precise relative of the beaker is just as critical to almost every laboratory.

Answer:

It doesn't have measure marks on it.

The ground-state electron configuration for an element contains an unpaired 3s electron.

Answers

Answer:

Na

Sodium is located in the third row of the periodic table, where the 3s3s3, s orbital is being filled. Because sodium is the first of the two 3s3s3, s elements, its ground-state electron configuration contains a single, unpaired 3s3s3, s electron.

Explanation:

its late but ik someone can use it

The ground-state electron configuration for an element contains an unpaired 3s electron is Sodium, Na.

The ground state electron configuration of an element shows a series of how its electrons are arranged in thier orbitals at their  lowest energy state.

The element which contained an unpaired 3s electron is the Alkali metal, Sodium.

Sodium, Na has atomic number of 11 and at ground state and will therefore be written as  1s²2s²2p⁶3s¹   We can also write the condensed form since the core electrons is the same with Ne,  a noble gas which is [Ne]3s1.

The s orbital should contain at most 2 electrons , since for sodium, it has 1 electron in the 3s orbital, we say it is unpaired.

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When a scientist analyzes experimental results, the scientist is generally:

Answers

creating graphs and preforming calculations

Terry bought a gold necklace at a pawnshop and was wondering if it was “real” gold. She decided to perform a density test. She placed the necklace in a graduated cylinder of water that had 47.00 mL of water and the water rose to 48.35 mL. She then weighed the necklace and found it to have a mass of 22.89 g. What is the density of Terry’s necklace?

Answers

Answer:

d = 16.96 g/mL

Explanation:

Given that,

Initial water level in graduated cylinder is 47 mL and final water level is 48.35 mL.

The weight of the neclace is 22.89 g.\

We need to find the volume of the necklace. We know that, density equals mass per unit volume. So,

[tex]d=\dfrac{m}{V_f-V_i}\\\\d=\dfrac{22.89\ g}{(48.35-47)\ mL}\\\\d=16.96\ g/mL[/tex]'

Hence, the density of Terry’s necklace is 16.96 g/mL.

Answer:

A

Explanation:

The new mine means the supply is high and the price is low, so she can afford the necklace

HELP QUICK ILL GIVE YOU BRAINLIEST AND 25 POINTS! bromine (br) has four energy levels. name 2 other elements that would have four energy levels.

Answers

Answer:

titanium and potassium

Explanation:

Answer: geranium and krypton

Explanation: hope this helps

Question 26 (1 point)
Use the periodic table to determine which statement below is true of the element Bromine (Br).

•Bromine will lose 7 valence electrons to become a negative ion.
•Bromine will lose 7 valence electrons to become a positive ion.
•Bromine will gain 1 valence electron to become a negative ion.
•Bromine will gain 1 valence electron to become a positive ion.

Answers

Answer:

The correct option is;

Bromine will gain 1 valence electron to become a negative ion

Explanation:

Bromine can be found in period 4 in group 17 of the periodic table and is an halogen

The electron configuration of bromine can be presented as follows;

Electronic configuration 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁵

Therefore, an atom of bromine has 2 + 5 or 7 electrons in its outermost shell, which makes it have one less electron to complete a full octet structure and therefore, bromine has a strong affinity for electron to complete its octet structure and it is thus a strong oxidizing agent.

When bromine enters into a chemical reaction and gains the one valence electron it becomes a negatively charged ion.

What is the charge of a chromium ion that has lost 4 electrons?

Answers

Answer:

Explanation:

When an atom loses electron(s) it will lose some of its negative charge and so becomes positively charged. A positive ion is formed where an atom has more protons than electrons. In the opposite case when an atom gains electron(s) it becomes negatively charged (more electrons than protons)

and plzs do not hate

The charge of chromium after losing 4 electrons is +2.

What is the ionic charge?

Ions are two or more charged particles that make up ionic compounds. Electrostatic attraction keeps the ions together (in the solid phase) despite their opposing charges. Cations are positively charged ions, whereas anions are negatively charged ions. Many factors make ionic molecules significant.

They act as electrolytes for batteries and conduct electricity when dissolved in water. They could form a strong bond with other charged particles, such as those found in environmental samples or the human body. They find use in fireworks, flares, and lights because they are frequently multicolored when burned. The list is endless!

Studying the nomenclature used to give ionic compounds distinctive names is a good method to become familiar with and exposed to them. You will learn how to properly explain the identification of substances in language by converting from a chemical formula to a name—a highly essential problem as the diversity and complexity of known compounds keeps growing!

Therefore, the charge on chromium after losing 4 electrons is +2.

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