All categories

3 years ago

A gas has ? Please help will appreciate it. Thanks

Chemistry

1 answer:

Kaylis [27]3 years ago

6 0

Answer is C. No definite shape or definite volume
A gas is a substance with no definite volume and no definite shape. Solids and liquids have volumes that do not change easily. A gas, on the other hand, has a vol- ume that changes to match the volume of its container. The molecules in a gas are very far apart compared with the molecules in a solid or a liquid.

You might be interested in

Balance the equation for the reaction of benzene and hydrogen to form cyclohexane.. C6H6 + H2 → C6H12.

Vedmedyk [2.9K]

Here is a universal law to balance chemical equations :
All chemical equations must be balanced because of the law of conservation of mass.
It states that "matter cannot be created or destroyed."
So, the number of atoms that you start with at the beginning of the reaction must equal the number of atoms that you end up with.
keeping this law in our mind,lets balance the equation for the reaction of benzene and hydrogen to form cyclohexane.
C 6 H 6 + H 2 → C 6 H 12.
Here is the balance chemical equation.
2 C 6 H 6 + 6 H 2 → 2 C 6 H 12.

3 0

3 years ago

Pls help i will mark brainlist

Veseljchak [2.6K]

58.5 moles

can i plz get brainliest

4 0

2 years ago

9. Thallium-208 has a half-life of 3.053 min. How long will it take for 120 g of it to decay

damaskus [11]

Answer:

12.213 minutes will be taken for 120 g-Thalium-208 to decay to 75 grams.

Explanation:

Radioactive isotopes decay exponentially in time, the mass of the isotope ( $m(t)$ ), in grams, is described by the formula in time ( $t$ ), in minutes:

$m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$ (1)

Where:

$m_{o}$ - Initial mass of the isotope, in grams.

$\tau$ - Time constant, in minutes.

In addition, the time constant associated with the isotope decay can be described in terms of half-life ( $t_{1/2}$ ), in minutes:

$\tau = \frac{t_{1/2}}{\ln 2}$ (2)

If we know that $m(t) = 7.5\,g$ , $m_{o} = 120\,g$ and $t_{1/2} = 3.053\,min$ , then the time taken by the isotope is:

$\tau = \frac{t_{1/2}}{\ln 2}$

$\tau = \frac{3.053\,min}{\ln 2}$

$\tau \approx 4.405\,min$

$t = -\tau \cdot \ln \frac{m(t)}{m_{o}}$

$t = -(4.405\,min)\cdot \ln \left(\frac{7.5\,g}{120\,g} \right)$

$t \approx 12.213\,min$

12.213 minutes will be taken for 120 g-Thalium-208 to decay to 75 grams.

4 0

2 years ago

Balance the equation

kap26 [50]

Answer: Balanced chemical equation will be :

$5SiO_2+2CaC_2\rightarrow 5Si+2CaO+4CO_2$

Explanation:

$SiO_2+CaC_2\rightarrow Si+CaO+CO_2$ (Unbalanced)

A balanced chemical reaction follows the Law of Conservation of Mass. which states in a chemical reaction mass can neither be created nor be destroyed. In other words total mass of the products is equal to the total mass of reactants.

Balanced chemical equation will be :

$5SiO_2+2CaC_2\rightarrow 5Si+2CaO+4CO_2$

3 0

3 years ago

Write all products and relevant tests and observations when KOH reacts with NH4NO3

Leni [432]

Answer:

get a bucket and a mop that's a wap that's wap I'm talking wobble wobble wobble that's a wap

3 0

2 years ago