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
Fed [463]
3 years ago
10

How many independent variables can be tested in a standard scientific experiment

Chemistry
1 answer:
Shalnov [3]3 years ago
6 0

One independent variable

You might be interested in
to show the electron configuration for an atom, what is the advantage of using an orbital notation compared to a dot structure
lesantik [10]

The advantage is o<span>rbital notation shows the spin of the electrons. That is the answer</span>

<span />

7 0
3 years ago
Read 2 more answers
One of the human body's adaptation is to sweat when it gets too hot. Sweat glands in the glands in the skin produce a solution o
Rina8888 [55]
The answer is D. Evaporated
5 0
3 years ago
Pick the correct answer!
Leto [7]

Answer:

I think it would be b. The octet rule states that transition metal group elements tend to react so that they attain a noble gas electron configuration.

8 0
3 years ago
Use the equation to determine what mass of FeS must react to form 326 g of FeCl2.
iogann1982 [59]

Answer:

We need 226 grams of FeS

Explanation:

Step 1: Data given

Mass of FeCl2 = 326 grams

Molar mass FeCl2 = 126.75 g/mol

Step 2: The balanced equation

FeS + 2 HCl → H2S + FeCl2

Step 3: Calculate moles FeCl2

Moles FeCl2 = 326 grams / 126.75 grams

Moles FeCl2 = 2.57 moles

Step 4: Calculate moles FeS needed

For 1 mol H2S and 1 mol FeCl2 produced, we need 1 mol FeS and 2 moles HCl

For 2.57 moles FeCl2 we need 2.57 moles FeS

Step 5: Calculate mass FeS

Mass FeS = 2.57 moles * 87.92 g/mol

Mass FeS = 226 grams FeS

We need 226 grams of FeS

4 0
3 years ago
Joan’s initial nickel (II) chloride sample was green and weighed 4.3872 g. After the dehydration reaction and removal of excess
ANEK [815]

Answer:

a) yes, it was an hydrate

b) the number of waters of hydration, x = 6

Explanation:

a) yes it was an hydrate because the mass decreased after the process of dehydration which means removal of water thus some water molecules were present in the sample.

b) NiCl2. xH2O

mass if dehydrated NiCl2 = 2.3921 grams

mass of water in the hydrated sample = mass of hydrated - mass of dehydrated = 4.3872 - 2.3921 = 1.9951 g which represent the mass of water that was present in the hydrated sample.

NiCl2.xH2O

mole of dehydrated NiCl2 = m/Mm = 2.3921/129.5994 = 0.01846 mole

mole of water = m/Mm = 1.9951/18.02 = 0.11072 mole

Divide both by the smallest number of mole (which is for NiCl2) to find the coefficient of each

for NiCl2 = 0.01846/0.01846 = 1

for H2O = 0.11072/0.01846 = 5.9976 = 6

thus the hydrated sample was NiCl2. 6H2O

4 0
3 years ago
Other questions:
  • A ruler has markings as shown below. Stefan uses this ruler to measure the length of a metal rod. How many decimal places should
    5·2 answers
  • Your dad is working on creating a brick border for the lake in your backyard. Each brick has a mass of 100 g and a volume of 20
    10·1 answer
  • What describes the basis of the band theory of metallic bonding
    11·1 answer
  • The ability to conduct electricity in the solid state is a characteristic of metallic bonding. This characteristic is best expla
    6·1 answer
  • Which of the three gases will have the highest average kinetic energy at a given temperature
    12·1 answer
  • Calculate the density of a block of water measuring 2 cm x 4 cm x 1 cm, with a mass of 5.4
    12·1 answer
  • What do many bases have in common
    15·1 answer
  • Two oxygen atoms bond with one carbon atom to form carbon dioxide. Carbon dioxide is a(n):
    11·1 answer
  • Calculate the activation energy for vacancy formation in Al given that the equilibrium number of vacancies at a temperature of 7
    15·1 answer
  • WILL MARK BRAINLIEST IF YOU ANSWER EVERY QUESTION!!!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!