1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
BaLLatris [955]
3 years ago
11

Nancy and Hiyang are training for a race. They entered some of their training notes in a chart. Which information should be adde

d to the chart in order find out who ran a greater distance? the time spent running each day the reference point used each day the units used to measure distance each day the location used by the runners each day
Chemistry
2 answers:
Mnenie [13.5K]3 years ago
4 0

The information that should be added to the chart in order to find out who ran a greater distance is THE UNITS USED TO MEASURE DISTANCE EACH DAY.

In science, the use of units if very important and each record made must be accompany with relevant units that are appropriate for the measurement taken. If units are not used along with data, it will be very difficult to quantify the values that are recorded. Scientists all over the world use SI units in their works in order to ensure uniformity.

katen-ka-za [31]3 years ago
3 0

The information that should be added to the chart in order find out who ran a greater distance are the units used to measure distance each day

 

Since we are talking about distance, then it is just correct that the units that must be added to the chart should be the measurement of the distance. The formula for distance is d = st. By using this formula, then you can accurately find the distance based on the speed of the runner and the time it took for them to reach the distance allocated.

You might be interested in
Calculate the density of carbon dioxide at STP
Artist 52 [7]

Answer:

Density = mass/volume

= 44/22.4

= 1.96 gram/liter

The density of the Carbon Dioxide at S.T.P. (Standard Temperature and Volume) is 1.96 gram/liter.

5 0
3 years ago
What are some properties of matter that can be identified without testing or measuring
kiruha [24]
Physical change - No change of matter in this phase
chemical change - All types of phase change occur here
8 0
3 years ago
How long does it take for a 12.62g sample of ammonia to heat from 209K to 367K if heated at a constant rate of 6.0kj/min? The me
Georgia [21]
First, consider the steps to heat the sample from 209 K to 367K.

1) Heating in liquid state from 209 K to 239.82 K

2) Vaporaizing at 239.82 K

3) Heating in gaseous state from 239.82 K to 367 K.


Second, calculate the amount of heat required for each step.

1) Liquid heating

Ammonia = NH3 => molar mass = 14.0 g/mol + 3*1g/mol = 17g/mol

=> number of moles = 12.62 g / 17 g/mol = 0.742 mol

Heat1 = #moles * heat capacity * ΔT

Heat1 = 0.742 mol * 80.8 J/mol*K * (239.82K - 209K) = 1,847.77 J

2) Vaporization

Heat2 = # moles * H vap

Heat2 = 0.742 mol * 23.33 kJ/mol = 17.31 kJ = 17310 J

3) Vapor heating

Heat3 = #moles * heat capacity * ΔT

Heat3 = 0.742 mol * 35.06 J / (mol*K) * (367K - 239.82K) = 3,308.53 J

Third, add up the heats for every steps:

Total heat = 1,847.77 J + 17,310 J + 3,308.53 J = 22,466.3 J

Fourth, divide the total heat by the heat rate:

Time = 22,466.3 J / (6000.0 J/min) = 3.7 min

Answer: 3.7 min


3 0
3 years ago
NEED IT ASAP!PLEASE HURRY
marin [14]

Answer:

snow, or freezing rain?

Explanation:

because freezing rain can occur then, but snow is more common.

7 0
2 years ago
Since helium is lighter than air, it is difficult to measure the mass of a sample, so to find out the mass of helium in a birthd
d1i1m1o1n [39]

Answer:

0.7457 g is the mass of the helium gas.

Explanation:

Given:  

Pressure = 3.04 atm

Temperature = 25.0 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T₁ = (25.0 + 273.15) K = 298.15 K  

Volume = 1.50 L

Using ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

3.04 atm × 1.50 L = n × 0.0821 L.atm/K.mol × 298.15 K  

<u>⇒n = 0.1863 moles</u>

Molar mass of helium = 4.0026 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

0.1863\ mole= \frac{Mass}{4.0026\ g/mol}

Mass_{He}= 0.7457\ g

<u>0.7457 g is the mass of the helium gas. </u>

6 0
3 years ago
Other questions:
  • How does the kinetic molecular theory explain the behavior of gases?
    6·1 answer
  • You have a strong solution of lemonade that you need to dilute before serving. During the dilution which of the following will c
    8·1 answer
  • Which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of Ni2+ i
    8·1 answer
  • 100 PNTS ANSWER ASAP PLZ The density of a particular small rubber ball is 1.1 g/cm3. It was dropped into a 100 mL beaker filled
    13·2 answers
  • Should have only one variable <br> what is the word to that definition
    14·1 answer
  • What is the molar mass of the anhydrous
    15·2 answers
  • What’s the answer? I need an answer as soon as possible please!
    8·2 answers
  • What mixtures can be separated by fractional distillation besides crude oil and liquid ethanol
    12·1 answer
  • Which TWO observations are evidence that a chemical change is happening?
    7·1 answer
  • Gas Law- please help!!!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!