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3 years ago

Which of the following could be considered a scientific statement?

Chemistry

2 answers:

Taya2010 [7]3 years ago

7 0

X rays have a lower frequency than microwaves would be the scientific statement.

lidiya [134]3 years ago

5 0

Answer: X‒rays have a lower frequency than microwaves.

Explanation:

Hi, a scientific statement contains an objective description of the theme aborded.

It doesn't contain subjectivity or words like: better, beautiful or favourite.

The fourth sentence doesn´t contain subjectivity, so, is a scientific statement. It just describes the x rays objective functions.

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Can someone please help me

Vanyuwa [196]

Answer:

1.7

Explanation:

Density = M/V

When you divide 4.52 by 2.6, you get 1.738461538, which can be simplified to 1.7.

7 0

3 years ago

Seawater is typically 3.5% salt and has a density of 1.03 g/mL. How many grams of salt would be needed to prepare enough seawate

Bas_tet [7]

Answer:

Amount of salt needed is around 2.3*10³ g

Explanation:

The salt content in sea water = 3.5 %

This implies that there is 3.5 g salt in 100 g sea water

Density of seawater = 1.03 g/ml

Volume of seawater = volume of tank = 62.5 L = 62500 ml

Therefore, the amount of seawater required is:

$=Density*Volume = 1.03g/ml*62500ml = 6.44*10^{4} g$

The amount of salt needed for the calculated amount of seawater is:

$=\frac{6.44*10^{4}g\ water*3.5g\ salt }{100g\ water} =2254 g =2.3*10^{3} g$

8 0

3 years ago

Why must humans find substitutes for many minerals found on Earth? (A) form at an extremely slow rate (B) controlled by other co

DochEvi [55]

The correct answer is C, too deep in the Earth to collect. Hope this helps!

3 0

3 years ago

If 5,800 j of energy are applied to a 15.2 kg piece of lead, by how much does the temp change if the specific heat of lead is 0.

scoray [572]

Answer:

The answer will be 2.98K

Explanation:

Using the formula:

Q = mc∆T

Q= 5,800 (heat in joules)

m= convert 15.2kg to g which is 15200g (mass in grams)

c= 0.128 J/g °c (Specific heat capacity)

∆T= what we need to find (temperature change)

5800J = 15200g x 0.128 x ∆T

= 2.98K

7 0

3 years ago

Which planets mass is nearly double that of mercury?

Nana76 [90]

Answer:

earth I think like that because earth is the second planet

4 0

3 years ago