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Amiraneli [1.4K]
3 years ago
15

What do scientist use to form a hypothesis

Chemistry
2 answers:
likoan [24]3 years ago
8 0

Answer:

an if/then statement

Explanation:

Kazeer [188]3 years ago
7 0
A hypothesis is usually written in the form of an if/then statement.
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5) Calculate the molality of 0.210 mol of KBr dissolved in 0.075kg pure<br> water?
Margaret [11]

Answer:

\boxed {\boxed {\sf 2.8 \ m }}

Explanation:

The formula for molality is:

m=\frac{moles \ of \ solute}{kg \ of \ solvent}

There are 0.210 moles of KBr and 0.075 kilograms of pure water.

moles= 0.210 \ mol \\kilograms = 0.075 \ kg

Substitute the values into the formula.

m= \frac{ 0.210 \ mol }{0.075 \ kg}

Divide.

m= 2.8 \ mol/kg= 2.8 \ m

The molality is <u>2.8 moles per kilogram</u>

5 0
3 years ago
At 23°C, 85.0 grams of NaNO3(s) are dissolved in 100. grams of H2O(l).
Alenkinab [10]

5g

Anything between 4 and 6 is ok.

8 0
3 years ago
What is the formula for potassium sulfide? <br> a. k2s2 <br> b. k2s <br> c. ks <br> d. ks2
wlad13 [49]
The formula for potassium sulfide is K2S
4 0
4 years ago
Read 2 more answers
How does the law of conservation of mass apply to this reaction: C2H4+O2=H2O+Co2?
pav-90 [236]
Consider the formation of water molecule. Hydrogen combines with oxygen to form  a water molecule.

 

In this case, the total mass of the reactants = total mass of the products. Also, the number of atoms of hydrogen and oxygen in the reactants side and the products side are equal.

that's all I know

3 0
3 years ago
Read 2 more answers
The US National Debt Clock showed the outstanding public debt to be $16,213,166,914,811 on October 28, 2012. How many stacks lik
Serggg [28]

Answer: 5.74×10^8 stacks

Explanation:

The U.S. quarter has a mass of 5.67 g and is approximately 1.55 mm thick.

1 stack would contain $2.83x 10^4

No. of stacks to pay off debt=

$16,213,166,914,811/2.83 ×10^4

= 5.74 × 10^8 stacks

6 0
4 years ago
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