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
Lorico [155]
3 years ago
15

Please help me! Two groups of students were tested to compare their speed working math problems. Each group was given the same p

roblems. One group used calculators and the other group computed without calculators.
1.) What is the independent variable?

2.) What is the dependent variable?

3.) What is the constant variable?
Chemistry
1 answer:
LiRa [457]3 years ago
4 0
The constant variable is the math problems, the dependent variable is the calculators, and the independent variables are the students
You might be interested in
A frying pan needs a Teflon coating of 1.00 mm in thickness to cover an area of 36.0 square inches. How many ounces of Teflon ar
Otrada [13]

Answer:

m = 0.659 ounce

Explanation:

It is given that,

The thickness of a Teflon coating is, d = 1 mm

Area of the coating, A = 36 inch²

The density of Teflon, d = 0.805 g/mL

We need to find ounces of Teflon are needed.

Firstly, find the volume of the Teflon needed,

1 inch² = 6.4516 cm²

36 inch² = 232.258 cm²

Density,

\rho=\dfrac{m}{V}

V is volume of the Teflon needed, V = Ad

So,

m=\rho V\\\\m=0.805\ g/cm^3\times 232.258\ cm^2 \times 0.1\ cm\\\\m=18.69\ g

Also, 1 gram = 0.035274 ounce

18.69 gram = 0.659 ounce

So, 0.659 ounces of Teflon are needed.

3 0
3 years ago
uyty7trrhgr sjkrvhvdvhv idlhasg iaiosg sidrug iowyhg eiroygiyega riyh aeoirgv aeyg reioaaioeyr goirfoiyer goiag oare5iphq vouptr
Vilka [71]

Answer:

what does this mean lol

Explanation:

?

6 0
3 years ago
What is the volume of 1g of ice in cm3?
Amanda [17]

Answer:

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

What is the volume of 1g of ice in cm3?

Explanation:

3 0
3 years ago
I have 2 samples of solid chalk (aka calcium carbonate). Sample A has a total mass of 4.12 g and Sample B has a total mass of 19
IRINA_888 [86]

Answer:

A) Sample B has more calcium carbonate molecules

Explanation:

M = Molar mass of calcium carbonate = 100.0869 g/mol

N_A = Avogadro's number = 6.022\times 10^{23}\ \text{mol}^{-1}

For the 4.12 g sample

Moles of a substance is given by

n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{4.12}{100.0869}\\\Rightarrow n=0.0411\ \text{mol}

Number of molecules is given by

nN_A=0.0411\times 6.022\times 10^{23}=2.48\times 10^{22}\ \text{molecules}

For the 19.37 g sample

n=\dfrac{19.37}{100.0869}\\\Rightarrow n=0.193\ \text{mol}

Number of molecules is given by

nN_A=0.193\times 6.022\times 10^{23}=1.16\times 10^{23}\ \text{molecules}

1.16\times 10^{23}\ \text{molecules}>2.48\times 10^{22}\ \text{molecules}

So, sample B has more calcium carbonate molecules.

The ratio of the elements of carbon, oxygen, calcium atoms, ions, has to be same in both the samples otherwise the samples cannot be considered as calcium carbonate. Same is applicable for impurities. If there are impurites then the sample cannot be considered as calcium carbonate.

7 0
3 years ago
The valences of metal x,y and z are 1,2 and 3 respectively. What are the formulae of their;a) hydroxides, b) sulphates, c) hydro
Rina8888 [55]

Answer:

See answer below

Explanation:

AS we know that the valence for those metals X, Y, and Z are 1, 2 and 3, we can determine the formula of each compound.

1. Hydroxides.

An hydroxide is formed when an oxyde of a metal reacts with water. When this happens, the general molecular formula is:

Meₐ(OH)ₙ

Where:

a: valence or charge of the hydroxide (Which is -1)

n: valence of the metal.

Following this, the formula for X, Y and Z would be:

XOH

Y(OH)₂

Z(OH)₃

2. Sulphates

Sulphates follow a similar rule of hydroxide in the general molecular formula, but instead of having a charge of -1, it has a charge of -2 so:

Mₐ(SO₄)ₙ

So, following the rule:

X₂SO₄

Y₂(SO₄)₂ ------> YSO₄

Z₂(SO₄)₃

3. Hydrogens

Following the same rule as the previous, hydrogens works with a charge of -1, so:

MₐHₙ

Then:

XH

YH₂

ZH₃

4. Carbonates.

This follows the same rule as sulphates, with the same charge so:

Mₐ(CO₃)ₙ

Then:

X₂CO₃

YCO₃

Z₂(CO₃)₃

5. Nitrates

Follow the same rule as the hydroxides, with the same charge of -1.

Mₐ(NO₃)ₙ

Then:

XNO₃

Y(NO₃)₂

Z(NO₃)₂

6. Phosphates

In the case of phosphates, these have a charge of -3 so:

Mₐ(PO₄)ₙ

Then:

X₃PO₄

Y₃(PO₄)₂

Z₃(PO₄)₃ ----> ZPO₄

Hope this helps

6 0
3 years ago
Other questions:
  • The ph of a solution prepared by mixing 50.0 ml of 0.125 m naoh and 40.0 ml of 0.125 m hno3 is ________.
    15·1 answer
  • How does chlorine react with ethene
    14·2 answers
  • Fill in the blanks to complete the following table. Symbol Ion formed Number of electrons in ion Number of protons in ion Cl ___
    13·1 answer
  • A sample of oxygen is collected over water at a total pressure of 692.2 mmHg at 17°C. The vapor pressure of water at 17°C is 14.
    15·1 answer
  • What does d in organic chemistry stand for
    14·1 answer
  • The type of response when a plant moves away from the stimulus
    8·1 answer
  • What is 65x2? .....talk too meeee!! lm.ao I’m hella bored:)
    14·2 answers
  • What is the conjugate base of HC6H6O6-
    13·1 answer
  • There are two suspects in a shooting investigation. Bullets are recovered from the crime scene. Both suspects own guns, and thes
    5·1 answer
  • If sodium (Na) is combined with Chlorine (CI), the compound would have which formula? A. Naci 0 O B. CINa C. ClaNa D. Na2C14​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!